1
LT1078/LT1079
10789fe
Micropower, Dual and
Quad, Single Supply, Precision Op Amps
Available in 8-Pin SO Package
50µA Max Supply Current per Amplifier
70µV Max Offset Voltage
180µA Max Offset Voltage in 8-Pin SO
250pA Max Offset Current
0.6µV
P-P
, 0.1Hz to 10Hz Voltage Noise
3pA
P-P
, 0.1Hz to 10Hz Current Noise
0.4µV/°C Offset Voltage Drift
200kHz Gain Bandwidth Product
0.07V/µs Slew Rate
Single Supply Operation
Input Voltage Range Includes Ground
Output Swings to Ground while Sinking Current
No Pull-Down Resistors Needed
Output Sources and Sinks 5mA Load Current
The LT
®
1078 is a micropower dual op amp in 8-pin
packages including the small outline surface mount pack-
age. The LT1079 is a micropower quad op amp offered in
the standard 14-pin packages. Both devices are optimized
for single supply operation at 5V. ±15V specifications are
also provided.
Micropower performance of competing devices is achieved
at the expense of seriously degrading precision, noise,
speed and output drive specifications. The design effort of
the LT1078/LT1079 was concentrated on reducing sup-
ply current without sacrificing other parameters. The
offset voltage achieved is the lowest on any dual or quad
nonchopper stabilized op amp—micropower or other-
wise. Offset current, voltage and current noise, slew rate
and gain bandwidth product are all two to ten times better
than on previous micropower op amps.
The 1/f corner of the voltage noise spectrum is at 0.7Hz,
at least three times lower than on any monolithic op amp.
This results in low frequency (0.1Hz to 10Hz) noise
performance which can only be found on devices with an
order of magnitude higher supply current.
Both the LT1078 and LT1079 can be operated from a
single supply (as low as one lithium cell or two Ni-Cad
batteries). The input range goes below ground. The all-
NPN output stage swings to within a few millivolts of
ground while sinking current—no power consuming pull
down resistors are needed.
Battery or Solar-Powered Systems
Portable Instrumentation
Remote Sensor Amplifier
Satellite Circuitry
Micropower Sample-and-Hold
Thermocouple Amplifier
Micropower Filters
Distribution of Input Offset Voltage
(LT1078 and LT1079 in H, J, N Packages)
INPUT OFFSET VOLTAGE (µV)
–120
PERCENT OF UNITS
080
1078/79 • TA02
80 40 40
16
14
12
10
8
6
4
2
0120
VS = 5V, 0V
TA = 25°C
Single Battery, Micropower, Gain = 100, Instrumentation Amplifier
+
+
INVERTING
INPUT
1M 2
3
16
5
7
A
1/2 LT1078
10.1k 1M
10.1k
NONINVERTING
INPUT
B
1/2 LT1078
4
8
3V (LITHIUM CELL)
OUT
TYPICAL PERFORMANCE
INPUT OFFSET VOLTAGE = 40µV
INPUT OFFSET CURRENT = 0.2nA
TOTAL POWER DISSIPATION = 240µW
COMMON MODE REJECTION = 110dB (AMPLIFIER LIMITED)
GAIN BANDWIDTH PRODUCT = 200kHz
OUTPUT NOISE = 85µV
P-P
0.1Hz TO 10Hz
= 300µV
RMS
OVER FULL BANDWIDTH
INPUT RANGE = 0.03V TO 1.8V
OUTPUT RANGE = 0.03V TO 2.3V
(0.3mV V
IN+
– V
IN
23mV)
OUTPUTS SINK CURRENT—NO PULL-DOWN RESISTORS
ARE NEEDED
LT1078/79 • TA01
+
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
2
LT1078/LT1079
10789fe
OBSOLETE PACKAGE
Consider the N Packages for Alternate Source
ABSOLUTE MAXIMUM RATINGS
W
WW
U
Operating Temperature Range
LT1078AM/LT1078M/
LT1079AM/LT1079M (OBSOLETE) ..... –55°C to 125°C
LT1078I/LT1079I .................................... 40°C to 85°C
LT1078AC/LT1078C/LT1078S8/
LT1079AC/LT1079C .................................... 0°C to 70°C
Lead Temperature (Soldering, 10 sec)..................300°C
Supply Voltage ...................................................... ±22V
Differential Input Voltage ....................................... ±30V
Input Voltage ...............Equal to Positive Supply Voltage
............5V Below Negative Supply Voltage
Output Short-Circuit Duration.......................... Indefinite
Storage Temperature Range
All Grades ......................................... 65°C to 150°C
PACKAGE/ORDER INFORMATION
W
UU
ORDER PART
NUMBER ORDER PART
NUMBER
1
2
3
4
8
7
6
5
TOP VIEW
IN A
OUT A
V+
OUT B
+IN A
V
+IN B
IN B
S8 PACKAGE
8-LEAD PLASTIC SO
B
A
NOTE: THIS PIN CONFIGURATION DIFFERS FROM THE
8-LEAD DIP PIN LOCATIONS. INSTEAD, IT FOLLOWS
THE INDUSTRY STANDARD LT1013DS8 SO PACKAGE
CONFIGURATION. FOR SIMILAR PERFORMANCE WITH
TRADITIONAL DIP PINOUT, SEE THE LT2078
ORDER PART NUMBER
LT1078ACH
LT1078MH LT1078IS8
LT1078S8
ORDER PART NUMBER
PART MARKING
1078
J8 PACKAGE
8-LEAD PDIP
T
JMAX
= 150°C, θ
JA
= 100°C/ W (J8)
T
JMAX
= 150°C, θ
JA
= 150°C/ W, θ
JC
= 45°C/W
TOP VIEW
OUT B
V
+
OUT A
–IN A –IN B
+IN B
+IN A
V
(CASE)
87
6
5
3
2
1
4
H PACKAGE
8-LEAD TO-5 METAL CAN
AB
1
2
3
4
8
7
6
5
TOP VIEW
V
+
OUT B
IN B
+IN B
OUT A
IN A
+IN A
V
N8 PACKAGE
8-LEAD PDIP
A
B
LT1079ACN
LT1079CN
LT1079IN
TOP VIEW
N PACKAGE
14-LEAD PDIP
J PACKAGE
14-LEAD CERAMIC DIP
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OUT A
IN A
+IN A
V+
+IN B
IN B
OUT B
OUT D
IN D
+IN D
V
+IN C
IN C
OUT C
AD
BC
T
JMAX
= 150°C, θ
JA
= 100°C/W (J)
LT1079ISW
LT1079SW
T
JMAX
= 110°C, θ
JA
= 220°C/W
1
2
3
4
5
6
7
8
TOP VIEW
SW PACKAGE
16-LEAD PLASTIC SO WIDE
16
15
14
13
12
11
10
9
OUT A
IN A
+IN A
V
+
+IN B
IN B
OUT B
NC
OUT D
IN D
+IN D
V–
+IN C
IN C
OUT C
NC
AD
BC
NOTE: FOR 14-PIN NARROW
PACKAGE SEE THE LT2079
T
JMAX
= 110°C, θ
JA
= 150°C/W
(Note 1)
OBSOLETE PACKAGES
Consider the N8 and S8 Packages for Alternate Source
T
JMAX
= 100°C, θ
JA
= 130°C/ W (N8)
T
JMAX
= 110°C, θ
JA
= 130°C/W (N)
LT1079MJ
LT1078AMJ8
LT1078MJ8
ORDER PART NUMBER
LT1078ACN8
LT1078CN8
LT1078IN8
3
LT1078/LT1079
10789fe
ELECTRICAL CHARACTERISTICS
VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 25°C unless otherwise noted.
LT1078C/LT1079C
LT1078I/LT1079I
LT1078AC/LT1079AC LT1078M/LT1079M
LT1078AM/LT1079AM LT1078S8/LT1079SW
SYMBOL PARAMETER CONDITIONS (NOTE 2) MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage LT1078 30 70 40 120 µV
LT1078IS8/LT1078S8 60 180 µV
LT1079 35 100 40 150 µV
LT1079ISW/LT1079SW 60 300 µV
V
OS
Long Term Input Offset 0.4 0.5 µV/Mo
Time Voltage Stability
I
OS
Input Offset Current 0.05 0.25 0.05 0.35 nA
I
B
Input Bias Current 6 8 6 10 nA
e
n
Input Noise Voltage 0.1Hz to 10Hz (Note 3) 0.6 1.2 0.6 µV
P-P
Input Noise Voltage Density f
O
= 10Hz (Note 3) 29 45 29 nVHz
f
O
= 1000Hz (Note 3) 28 37 28 nVHz
i
n
Input Noise Current 0.1Hz to 10Hz (Note 3) 2.3 4.0 2.3 pA
P-P
Input Noise Current Density f
O
= 10Hz (Note 3) 0.06 0.10 0.06 pAHz
f
O
= 1000Hz 0.02 0.02 pAHz
Input Resistance (Note 4)
Differential Mode 400 800 300 800 M
Common Mode 6 6 G
Input Voltage Range 3.5 3.8 3.5 3.8 V
0 0.3 0 0.3 V
CMRR Common Mode Rejection Ratio V
CM
= 0V to 3.5V 97 110 94 108 dB
PSRR Power Supply Rejection Ratio V
S
= 2.3V to 12V 102 114 100 114 dB
A
VOL
Large-Signal Voltage Gain V
O
= 0.03V to 4V, No Load 200 1000 150 1000 V/mV
V
O
= 0.03V to 3.5V, R
L
= 50k 150 600 120 600 V/mV
Maximum Output Voltage Output Low, No Load 3.5 6 3.5 6 mV
Swing Output Low, 2k to GND 0.55 1.0 0.55 1.0 mV
Output Low, I
SINK
= 100µA 95 130 95 130 mV
Output High, No Load 4.2 4.4 4.2 4.4 V
Output High, 2k to GND 3.5 3.9 3.5 3.9 V
SR Slew Rate A
V
= 1, V
S
= ±2.5V 0.04 0.07 0.04 0.07 V/µs
GBW Gain Bandwidth Product f
O
20kHz 200 200 kHz
I
S
Supply Current per Amplifier 38 50 39 55 µA
Channel Separation V
IN
= 3V, R
L
= 10k 130 130 dB
Minimum Supply Voltage (Note 5) 2.2 2.3 2.2 2.3 V
4
LT1078/LT1079
10789fe
ELECTRICAL CHARACTERISTICS
The denotes the specifications which apply over the temperature range
–40°C TA 85°C for I grades, – 55°C TA 125°C for AM/M grades. VS = 5V, 0V, VCM = 0.1V, VO = 1.4V unless otherwise noted.
LT1078I/LT1079I
LT1078AM/LT1079AM LT1078M/LT1079M
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage LT1078 70 250 95 370 µV
LT1078IS8/LT1079 80 280 100 400 µV
LT1079ISW 100 560 µV
V
OS
Input Offset Voltage Drift 0.4 1.8 0.5 2.5 µV/°C
T (Note 6) LT1078IS8 0.6 3.5 µV/°C
LT1079ISW 0.7 4.0 µV/°C
I
OS
Input Offset Current 0.07 0.50 0.07 0.70 nA
LT1078I/LT1079I 0.1 1.0 nA
I
B
Input Bias Current 710 712 nA
CMRR Common Mode Rejection Ratio V
CM
= 0.05V to 3.2V 92 106 88 104 dB
PSRR Power Supply Rejection Ratio V
S
= 3.1V to 12V 98 110 94 110 dB
A
VOL
Large-Signal Voltage Gain V
O
= 0.05V to 4V, No Load 110 600 80 600 V/mV
V
O
= 0.05V to 3.5V, R
L
= 50k 80 400 60 400 V/mV
Maximum Output Voltage Output Low, No Load 4.5 8 4.5 8 mV
Swing Output Low, I
SINK
= 100µA125 170 125 170 mV
Output High, No Load 3.9 4.2 3.9 4.2 V
Output High, 2k to GND 3.0 3.7 3.0 3.7 V
I
S
Supply Current per Amplifier 43 60 45 70 µA
LT1078C/LT1079C
LT1078AC/LT1079AC LT1078S8/LT1079SW
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage LT1078 50 150 60 240 µV
LT1079 60 180 70 270 µV
LT1078S8 85 350 µV
LT1079SW 90 480 µV
V
OS
Input Offset Voltage Drift 0.4 1.8 0.5 2.5 µV/°C
T (Note 6) LT1078S8 0.6 3.5 µV/°C
LT1079SW 0.7 4.0 µV/°C
I
OS
Input Offset Current 0.06 0.35 0.06 0.50 nA
I
B
Input Bias Current 69 611nA
CMRR Common Mode Rejection Ratio V
CM
= 0V to 3.4V 94 108 90 106 dB
PSRR Power Supply Rejection Ratio V
S
= 2.6V to 12V 100 112 97 112 dB
A
VOL
Large-Signal Voltage Gain V
O
= 0.05V to 4V, No Load 150 750 110 750 V/mV
V
O
= 0.05V to 3.5V, R
L
= 50k 110 500 80 500 V/mV
Maximum Output Voltage Output Low, No Load 4.0 7 4.0 7 mV
Swing Output Low, I
SINK
= 100µA105 150 105 150 mV
Output High, No Load 4.1 4.3 4.1 4.3 V
Output High, 2k to GND 3.3 3.8 3.3 3.8 V
I
S
Supply Current per Amplifier 40 55 42 63 µA
The denotes the specifications which apply over the temperature range 0°C TA 70°C. VS = 5V, 0V, VCM = 0.1V, VO = 1.4V
unless otherwise noted.
5
LT1078/LT1079
10789fe
ELECTRICAL CHARACTERISTICS
VS = ±15V, TA = 25°C unless otherwise noted.
LT1078C/LT1079C
LT1078I/LT1079I
LT1078AC/LT1079AC LT1078M/LT1079M
LT1078AM/LT1079AM LT1078S8/LT1079SW
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage (Including LT1078IS8/LT1078S8) 50 250 70 350 µV
LT1079ISW/LT1079SW 80 500 µV
I
OS
Input Offset Current 0.05 0.25 0.05 0.35 nA
I
B
Input Bias Current 6 8 6 10 nA
Input Voltage Range 13.5 13.8 13.5 13.8 V
–15.0 –15.3 –15.0 –15.3 V
CMRR Common Mode Rejection Ratio V
CM
= 13.5V, –15V 100 114 97 114 dB
PSRR Power Supply Rejection Ratio V
S
= 5V, 0V to ±18V 102 114 100 114 dB
A
VOL
Large-Signal Voltage Gain V
O
= ±10V, R
L
= 50k 1000 5000 1000 5000 V/mV
V
O
= ±10V, R
L
= 2k 400 1100 300 1100 V/mV
V
OUT
Maximum Output Voltage R
L
= 50k ±13.0 ±14.0 ±13.0 ±14.0 V
Swing R
L
= 2k ±11.0 ±13.2 ±11.0 ±13.2 V
SR Slew Rate 0.06 0.10 0.06 0.10 V/µs
I
S
Supply Current per Amplifier 46 65 47 75 µA
The denotes the specifications which apply over the temperature range – 40°C TA 85°C for I grades, –55°C TA 125°C for
AM/M grades. VS = ±15V unless otherwise noted.
LT1078I/LT1079I
LT1078AM/LT1079AM LT1078M/LT1079M
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage (Including LT1078IS8) 90 430 120 600 µV
LT1079ISW 130 825 µV
V
OS
Input Offset Voltage Drift 0.5 1.8 0.6 2.5 µV/°C
T (Note 6) LT1078IS8 0.7 3.8 µV/°C
LT1079ISW 0.8 5.0 µV/°C
I
OS
Input Offset Current 0.07 0.50 0.07 0.70 nA
LT1078I/LT1079I 0.1 1.0 nA
I
B
Input Bias Current 710 712 nA
A
VOL
Large-Signal Voltage Gain V
O
= ±10V, R
L
= 5k 200 700 150 700 V/mV
CMRR Common Mode Rejection Ratio V
CM
= 13V, –14.9V 94 110 90 110 dB
PSRR Power Supply Rejection Ratio V
S
= 5V, 0V to ±18V 98 110 94 110 dB
Maximum Output Voltage Swing R
L
= 5k ±11.0 ±13.5 ±11.0 ±13.5 V
I
S
Supply Current per Amplifier 52 80 54 95 µA
6
LT1078/LT1079
10789fe
ELECTRICAL CHARACTERISTICS
The denotes the specifications which apply over the temperature range
0°C TA 70°C. VS = ±15V unless otherwise noted.
LT1078C/LT1079C
LT1078AC/LT1079AC LT1078S8/LT1079SW
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage 70 330 90 460 µV
LT1078S8 100 540 µV
LT1079SW 115 750 µV
V
OS
Input Offset Voltage Drift 0.5 1.8 0.6 2.5 µV/°C
T (Note 6) LT1078S8 0.7 3.8 µV/°C
LT1079SW 0.8 5.0 µV/°C
I
OS
Input Offset Current 0.06 0.35 0.06 0.50 nA
I
B
Input Bias Current 69 611 nA
A
VOL
Large-Signal Voltage Gain V
O
= ±10V, R
L
= 5k 300 1200 250 1200 V/mV
CMRR Common Mode Rejection Ratio V
CM
= 13V, –15V 97 112 94 112 dB
PSRR Power Supply Rejection Ratio V
S
= 5V, 0V to ±18V 100 112 97 112 dB
Maximum Output Voltage Swing R
L
= 5k ±11.0 ±13.6 ±11.0 ±13.6 V
I
S
Supply Current per Amplifier 49 73 50 85 µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Typical parameters are defined as the 60% yield of parameter
distributions of individual amplifiers, i.e., out of 100 LT1079s (or 100
LT1078s) typically 240 op amps (or 120) will be better than the indicated
specification.
Note 3: This parameter is tested on a sample basis only. All noise
parameters are tested with V
S
= ±2.5V, V
O
= 0V.
Note 4: This parameter is guaranteed by design and is not tested.
Note 5: Power supply rejection ratio is measured at the minimum supply
voltage. The op amps actually work at 1.8V supply but with a typical offset
skew of –300µV.
Note 6: This parameter is not 100% tested.
7
LT1078/LT1079
10789fe
TIME (SEC)
0
NOISE VOLTAGE (0.4µV/DIV)
8
LT1078/79 • TPC04
24610
CHANNEL A
CHANNEL B
TA = 25°C
VS = ±2.5V
TYPICAL PERFORMANCE CHARACTERISTICS
UW
Input Bias Current
vs Common Mode Voltage
Input Bias and Offset Currents
vs TemperatureSupply Current vs Temperature
TEMPERATURE (°C)
–50
SUPPLY CURRENT PER AMPLIFIER (µA)
55
50
45
40
35
30
25 25 75
LT1078/79 • TPC01
–25 0 50 100 125
VS = ±15V
VS = 5V, 0V
TEMPERATURE (°C)
–50
BIAS CURRENT (nA) OFFSET CURRENT (pA)
100
50
0
–5
–6
–7 050 75
LT1078/79 • TPC02
–25 25 100 125
I
OS
I
B
V
S
= 5V, 0V TO ±15V
COMMON MODE VOLTAGE (V)
–1
INPUT BIAS CURRENT (nA)
0
–2
–4
–6
–8
–10
–12 0123
LT1078/79 • TPC03
4
T
A
= 125°C
T
A
= –55°C
V
S
= 5V, 0V
T
A
= 25°C
0.1Hz to 10Hz Noise 0.01Hz to 10Hz Noise Noise Spectrum
TIME (SEC)
0
NOISE VOLTAGE (0.4µV/DIV)
80
LT1078/79 • TPC05
20 40 60 100
CHANNEL B
T
A
= 25°C
V
S
= ±2.5V
CHANNEL A
0.4µV
FREQUENCY (Hz)
0.1 1 100
10
VOLTAGE NOISE DENSITY (nV/Hz)
CURRENT NOISE DENSITY (fA/Hz)
100
30
1000
300
10 1000
LT1078/79 • TPC06
CURRENT
NOISE
VOLTAGE
NOISE
1/f CORNER
0.7Hz
TA = 25°C
VS = ±2.5V
(AT VS = ±15V
VOLTAGE NOISE
IS 4% LESS
CURRENT NOISE
IS UNCHANGED)
10Hz Voltage Noise Distribution
Distribution of Offset Voltage Drift
with Temperature (In All Packages
Except Surface Mount)
Long Term Stability of Two
Representative Units (LT1078)
VOLTAGE NOISE DENSITY (nV/Hz)
25
LT1078/79 • TPC07
30 35 40
PERCENT OF UNITS
35
30
25
20
15
10
5
0
T
A
= 25°C
V
S
= ±2.5V
329 OP AMPS TESTED
FROM THREE RUNS
106 LT1078'S
45 LT1079'S
TIME (MONTHS)
0
OFFSET VOLTAGE CHANGE (µV)
1234
LT078/79 • TPC09
5
15
10
5
0
–5
–10
–15
T
A
= 25°C, V
S
= 5V, 0V
V
CM
= 0.1V
1A
2B
1B
2A
OFFSET VOLTAGE DRIFT WITH TEMPERATURE (µV/°C)
PERCENT OF UNITS
25
20
15
10
5
0
LT1078/79 • TPC08
2 –1 0 1 2
1111
357
44
120109
85
47
43
89
VS = 5V, 0V
VCM = 0.1V
120 LT1078'S
70 LT1079'S
520 OP AMPS
8
LT1078/LT1079
10789fe
TYPICAL PERFORMANCE CHARACTERISTICS
UW
LOAD RESISTANCE TO GROUND ()
100
100k
VOLTAGE GAIN (V/V)
1M
10M
10k 100k1k 1M
LT1078/79 • TPC18
25°C
–55°C
125°C
25°C
–55°C
125°C
VS = ±15V
VS = 5V, 0V
Minimum Supply Voltage
POSITIVE SUPPLY VOLTAGE (V)
0
INPUT OFFSET VOLTAGE (µV)
100
0
100
200
300
400
500
LT1078/79 • TPC16
123
V = 0V
0.1V VCM 0.4V
125°C
–55°C
0°C
25°C
70°C
NONFUNCTIONAL
Voltage Gain vs Frequency
FREQUENCY (Hz)
0.01
VOLTAGE GAIN (dB)
1M
LT1078/79 • TPC10
1100 10k
140
120
100
80
60
40
20
0
–20 0.1 10 1k 100k
V
S
= ±15V
V
S
= 5V, 0V
T
A
= 25°C
Slew Rate, Gain Bandwidth
Product and Phase Margin vs
Temperature
TEMPERATURE (°C)
–50
GAIN BANDWIDTH
PRODUCT (kHz) SLEW RATE (V/µs)
PHASE MARGIN (DEG)
0.12
0.10
0.08
0.06
0.04
240
220
200
180
160
80
70
60
50
40
050 75
LT1078/79 • TPC13
–25 25 100 125
SLEW = ±15V
GBW = ±15V
GBW = 5V, 0V
SLEW = 5V, 0V
φ
M
= ±15V
φ
M
= 5V, 0V
f
O
= 20kHz
Large-Signal Transient Response
VS = 5V, 0V
1V/DIV
A
V
= 1, NO LOAD 50µs/DIV
INPUT PULSE 0V TO 3.8V
LT1078/79 • TPC27
0V
Warm-Up Drift
TIME AFTER POWER-ON (MINUTES)
0
CHANGE IN OFFSET VOLTAGE (µV)
LT1078/79 • TPC17
12
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
03
T
A
= 25°C
V
S
= ±15V
WARM UP DRIFT
AT V
S
= 5V, 0V IS
IMMEASURABLY LOW
LT1079
LT1078
Large-Signal Transient Response
VS = ±15V
5V/DIV
A
V
= 1 100µs/DIV
NO LOAD
LT1078/79 • TPC28
0V
Voltage Gain vs Load Resistance
Capacitive Load Handling
CAPACITIVE LOAD (pF)
10
OVERSHOOT (%)
120
100
80
60
40
20
010000
LT1078/79 • TPC12
1000100
T
A
= 25°C
V
S
= 5V, 0V
A
V
= 1
A
V
= 10
A
V
= 5
Gain, Phase vs Frequency
FREQUENCY (kHz)
30
30
20
10
0
–10 100 300
LTC1078/79 TPC11
VOLTAGE GAIN (dB)
100
120
140
160
180
200
PHASE SHIFT (DEG)
10 1000
PHASE
MARGIN
66°
PHASE
MARGIN
54°
5V, 0V ±15V
±15V
5V, 0V
TA = 25°C
CL = 20pF
GAIN
9
LT1078/LT1079
10789fe
TYPICAL PERFORMANCE CHARACTERISTICS
UW
TEMPERATURE (°C)
–50
COMMON MODE RANGE (V)
25 0 25 50 75
LT1078/79 • TPC22
125
V
+
V
+
– 1
V
+
– 2
V
+ 1
V
V
– 1 100
V
+
= 2.5V TO 18V
V
= 0V TO –18V
Output Saturation vs Temperature
vs Sink Current
TEMPERATURE (°C)
–50
SATURATION VOLTAGE (mV)
1000
100
10
125 125
LT1078/79 • TPC19
0 25 50 10075
I
SINK
= 2mA
I
SINK
= 1mA
I
SINK
= 100µA
I
SINK
= 1µA
NO LOAD
R
L
= 5k TO GND
I
SINK
= 10µA
V
S
= 5V, 0V
Common Mode Range
vs Temperature Closed Loop Output Impedance
FREQUENCY (Hz)
OUTPUT IMPEDANCE ()
1k
100
10
1
0.1
LT1078/79 • TPC24
10 100 1k 10k 100k
A
V
= 100
A
V
= 10
A
V
= 1
Output Voltage Swing
vs Load Current
SOURCING OR SINKING LOAD CURRENT (mA)
0.01
OUTPUT VOLTAGE SWING (V)
V
+
V
+
– 1
V
+
– 2
V
+ 2
V
+ 1
V
10
LT1078/79 • TPC20
0.1 1
125°C25°C
–55°C
125°C
–55°C
25°C
Undistorted Output Swing
vs Frequency
FREQUENCY (kHz)
0.01
PEAK-TO-PEAK OUTPUT SWING, V
S
= ±15V (V)
PEAK-TO-PEAK OUTPUT SWING, V
S
= 5V, 0V (V)
30
20
10
0
5
4
3
2
1
0
100
LT1078/79 • TPC23
110
V
S
= 5V, 0V
R
L
100k
V
S
= ±15V
R
L
100k
V
S
= ±15V
R
L
= 30k
V
S
= 5V, 0V
R
L
1k
T
A
= 25°C
LOAD R
L
,
TO GND
Distribution of Input Offset Voltage
(LT1078 in 8-Pin SO Package)
Channel Separation vs Frequency
Power Supply Rejection Ratio
vs Frequency
Common Mode Rejection Ratio
vs Frequency
FREQUENCY (Hz)
10
COMMON MODE REJECTION RATIO (dB)
100 1k 10k 100k
LT1078/79 • TPC25
1M
T
A
= 25°C
120
100
80
60
40
20
0
V
S
= ±15V
V
S
= 5V, 0V
FREQUENCY (Hz)
0.1
POWER SUPPLY REJECTION RATIO (dB)
120
100
80
60
40
20
0100 10k
LT1078/79 • TPC26
110 1k 100k 1M
TA = 25°C
VS = ±2.5V + 1VP-P SINE WAVE
POSITIVE
SUPPLY
NEGATIVE
SUPPLY
FREQUENCY (Hz)
1 1k 100k
LT1078/79 • TPC27
10 100 10k 1M
CHANNEL SEPARATION (dB)
140
120
100
80
60
40
20
0
TA = 25°C
VS = ±2.5V
VIN = 3VP-P TO 2kHz
RL = 10k
INPUT OFFSET VOLTAGE (µV)
160
PERCENT OF UNITS
160
LT1078/79 • TPC21
–80 080
16
14
12
10
8
6
4
2
0120 –40 40 120
T
A
= 25°C
V
S
= 5V, 0V
10
LT1078/LT1079
10789fe
TYPICAL PERFORMANCE CHARACTERISTICS
UW
Small-Signal Transient Response
VS = ±2.5V
20mV/DIV
A
V
= 1 10µs/DIV
C
L
= 15pF
LT1078/79 • TPC25
0V
Small-Signal Transient Response
VS = 5V, 0V
20mV/DIV
A
V
= 1 10µs/DIV
C
L
= 15pF
INPUT 50mV TO 150mV LT1078/79 • TPC24
0.1V
Small-Signal Transient Response
VS = ±15V
20mV/DIV
A
V
= 1 10µs/DIV
C
L
= 15pF
LT1078/79 • TPC26
0V
APPLICATIONS INFORMATION
WUUU
The LT1078/LT1079 devices are fully specified with
V
+
= 5V, V
= 0V, V
CM
= 0.1V. This set of operating
conditions appears to be the most representative for
battery-powered micropower circuits. Offset voltage is
internally trimmed to a minimum value at these supply
voltages. When 9V or 3V batteries or ±2.5V dual supplies
are used, bias and offset current changes will be minimal.
Offset voltage changes will be just a few microvolts as
given by the PSRR and CMRR specifications. For example,
if PSRR = 114dB (= 2µV/V), at 9V the offset voltage change
will be 8µV. Similarly, V
S
= ±2.5V, V
CM
= 0V is equivalent
to a common mode voltage change of 2.4V or a V
OS
change of 7µV if CMRR = 110dB (3µV/V).
A full set of specifications is also provided at ±15V supply
voltages for comparison with other devices and for com-
pleteness.
Single Supply Operation
The LT1078/LT1079 are fully specified for single supply
operation, i.e., when the negative supply is 0V. Input
common mode range goes below ground and the output
swings within a few millivolts of ground while sinking
current. All competing micropower op amps either cannot
swing to within 600mV of ground (OP-20, OP-220, OP-420)
or need a pull-down resistor connected to the output to swing
to ground (OP-90, OP-290, OP-490, HA5141/42/44). This
11
LT1078/LT1079
10789fe
APPLICATIONS INFORMATION
WUUU
difference is critical because in many applications these
competing devices cannot be operated as micropower op
amps and swing to ground simultaneously.
As an example, consider the instrumentation amplifier
shown on the front page. When the common mode signal
is low and the output is high, amplifier A has to sink
current. When the common mode signal is high and the
output low, amplifier B has to sink current. The competing
devices require a 12k pull-down resistor at the output of
amplifier A and a 15k at the output of B to handle the
specified signals. (The LT1078 does not need pull-down
resistors.) When the common mode input is high and the
output is high these pull-down resistors draw 300µA (150µA
each), which is excessive for micropower applications.
The instrumentation amplifier is by no means the only
application requiring current sinking capability. In seven
of the nine single supply applications shown in this data
sheet the op amps have to be able to sink current. In two
of the applications the first amplifier has to sink only the
6nA input bias current of the second op amp. The compet-
ing devices, however, cannot even sink 6nA without a pull-
down resistor
Since the output of the LT1078/LT1079 cannot go exactly
to ground, but can only approach ground to within a few
millivolts, care should be exercised to ensure that the
output is not saturated. For example, a 1mV input signal
will cause the amplifier to set up in its linear region in the
gain 100 configuration shown in Figure 1a, but is not
Single supply operation can also create difficulties at the
input. The driving signal can fall below 0V — inadvertently
or on a transient basis. If the input is more than a few
hundred millivolts below ground, two distinct problems
can occur on previous single supply designs, such as the
LM124, LM158, OP-20, OP-21, OP-220, OP-221, OP-420
(1 and 2), OP-90/290/490 (2 only):
1. When the input is more than a diode drop below ground,
unlimited current will flow from the substrate (V
terminal) to the input. This can destroy the unit. On the
LT1078/LT1079, resistors in series with the input protect
the devices even when the input is 5V below ground.
2. When the input is more than 400mV below ground (at
25°C), the input stage saturates and phase reversal
occurs at the output. This can cause lockup in servo
systems. Due to a unique phase reversal protection cir-
cuitry, the LT1078/LT1079 output does not reverse, as
illustrated in Figure 2, even when the inputs are at –1V.
enough to make the amplifier function properly in the
voltage follower mode, Figure 1b.
Figure 1a. Gain 100 Amplifier
+
5V
1mV
R99R
100mV
LT1078/79 • F01a
+
5V
1mV
OUTPUT
SATURATED
3.5mV
LT1078/79 • F01b
Figure 1b. Voltage Follower
Figure 2. Voltage Follower with Input Exceeding the Negative Common Mode Range (VS = 5V, 0V)
2V
0V
6V
P-P
INPUT 1ms/DIV
–1V TO 5V
LT1078/79 • F02a
1ms/DIV
LT1078/LT1079 NO PHASE REVERSAL
LT1078/79 • F02C
2V
0V
4V
1ms/DIV
OP-90 EXHIBITS OUTPUT PHASE REVERSAL
LT1078/79 • F02b
2V
0V
4V
4V
12
LT1078/LT1079
10789fe
APPLICATIONS INFORMATION
WUUU
Matching Specifications
In many applications the performance of a system de-
pends on the matching between two op amps, rather than
the individual characteristics of the two devices. The two
and three op amp instrumentation amplifier configura-
tions shown in this data sheet are examples. Matching
characteristics are not 100% tested on the LT1078/LT1079.
Some specifications are guaranteed by definition. For
example, 70µV maximum offset voltage implies that mis-
match cannot be more than 140µV. 97dB (= 14µV/V)
CMRR means that worst-case CMRR match is 91dB
(= 28µV/V). However, Table 1 can be used to estimate the
expected matching performance at V
S
= 5V, 0V between
the two sides of the LT1078, and between amplifiers A and
D, and between amplifiers B and C of the LT1079.
Table 1
LT1078AC/LT1079AC/LT1078AM/LT1079AM LT1078C/LT1079C/LT1078M/LT1079M
PARAMETER 50% YIELD 98% YIELD 50% YIELD 98% YIELD UNITS
V
OS
Match, V
OS
LT1078 30 110 50 190 µV
LT1079 40 150 50 250 µV
Temperature Coefficient V
OS
0.5 1.2 0.6 1.8 µV/°C
Average Noninverting I
B
68610 nA
Match of Noninverting I
B
0.12 0.4 0.15 0.5 nA
CMRR Match 120 100 117 97 dB
PSRR Match 117 105 117 102 dB
Comparator Applications
The single supply operation of the LT1078/LT1079 and its
ability to swing close to ground while sinking current lends itself to use as a precision comparator with TTL
compatible output.
4
V
S
= 5V, 0V 200µs/DIV
LT2078/79 • F03
2
0
0
–100
INPUT (mV) OUTPUT (V)
Figure 3. Comparator Rise Response
Time to 10mV, 5mV, 2mV Overdrives
V
S
= 5V, 0V 200µs/DIV
LT2078/79 • F04
0
100
0
INPUT (mV) OUTPUT (V)
4
2
Figure 4. Comparator Fall Response
Time to 10mV, 5mV, 2mV Overdrives
13
LT1078/LT1079
10789fe
TYPICAL APPLICATIONS
U
Micropower, 10ppm/°C, ±5V Reference Gain of 10 Difference Amplifier
+
+
2M
220k
120k 3
2
1
8
4
1/2 LT1078
9V
5.000V
OUT
1M 6
5
7
LT1034BC-1.2
510k
1M
5.000V
OUT
–9V 510k
1%
20k
160k
1%
1/2 LT1078
SUPPLY CURRENT = 9V BATTERY = 115µA
9V BATTERY = 85µA
OUTPUT NOISE = 36µV
P-P
, 0.1Hz TO 10Hz
THE LT1078 CONTRIBUTES LESS THAN 3% OF THE TOTAL OUTPUT NOISE AND
DRIFT WITH TIME AND TEMPERATURE. THE ACCURACY OF THE –5V OUTPUT
DEPENDS ON THE MATCHING OF THE TWO 1M RESISTORS
LT1078/79 • TA03
+
1M
1M
10M
OUTPUT
0.0035V TO 2.4V
1/2 LT1078
BANDWIDTH= 20kHz
OUTPUT OFFSET= 0.7mV
OUTPUT NOISE= 80µV
P-P
(0.1Hz TO 10Hz)
260µV
RMS
OVER FULL
BANDWIDTH
THE USEFULNESS OF DIFFERENCE AMPLIFIERS IS LIMITED BY
THE FACT THAT THE INPUT RESISTANCE IS EQUAL TO THE SOURCE
RESISTANCE. THE PICOAMPERE OFFSET CURRENT AND LOW
CURRENT NOISE OF THE LT1078 ALLOWS THE USE OF 1M SOURCE
RESISTORS WITHOUT DEGRADATION IN PERFORMANCE. IN ADDITION,
WITH MEGOHM RESISTORS MICROPOWER OPERATION CAN BE MAINTAINED
LT1078/79 • TA04
–IN
+IN
10M
3V
Picoampere Input Current, Triple Op Amp Instrumentation Amplifier with Bias Current Cancellation
+
9
10
8
1/4 LT1079
+
+
+
R2
1M
R2
1M
1/4 LT1079
1/4 LT1079
1/4 LT1079
3
2
1
R1
1M
R1
1M
R
G
200k
6
5
7
12
13
14
R3
9.1M
R3
9.1M
9V
4
11
2R
20M
OUTPUT
4mV TO 8.2V
R
10M
2R
20M
–IN
+IN
GAIN = 1 +
()
2R1
R
G
R3
R2 = 100 FOR VALUES SHOWN
LT`1078/79 • TA05
INPUT BIAS CURRENT TYPICALLY < 150pA
INPUT RESISTANCE = 3R = 30M FOR VALUES SHOWN
NEGATIVE COMMON MODE LIMIT = (I
B
)(2R) + 20mV 140mV
GAIN BANDWIDTH PRODUCT = 1.8MHz
14
LT1078/LT1079
10789fe
TYPICAL APPLICATIONS
U
85V, –100V Common Mode Range
Instrumentation Amplifier (AV = 10)
+
+
6
5
7
1/2 LT1078
100k
100k
1/2 LT1078
2
3
1
OUTPUT
8V TO –9V
LT1078/79 • TA06
BANDWIDTH= 2kHz
OUTPUT OFFSET= 8mV
OUTPUT NOISE= 0.8mV
P-P
(0.1Hz TO 10Hz)
= 1.4mV
RMS
OVER FULL BANDWIDTH
(DOMINATED BY RESISTOR NOISE)
9V
–9V
8
4
1M
10M
1M
10M
10M
+IN
–IN
INPUT RESISTANCE = 10M
+
1/2 LT1078 OUTPUT
LT1078/79 • TA07
V
OMIN
= 6mV
NO DISTORTION TO 100Hz
3V
2M
2M
1M
INPUT
1.8V
–1.8V
1.8V
0V
Half-Wave Rectifier
Absolute Value Circuit (Full-Wave Rectifier)
+
+
5
6
7
1/2 LT1078
1/2 LT1078
2
3
1
OUTPUT
LT1078/79 • TA08
VOMIN = 4mV
NO DISTORTION TO 100Hz
5V
8
4
200k
200k
INPUT
1N4148
3.5V
3.5V
0V
3.5V
Programmable Gain Amplifier (Single Supply)
13
12
14 OUT
+
1/4 LT1079
9
10
+
1/4 LT1079
6
5
+
1/4 LT1079
2
3
88
3
1
2
7
4
9
A
C
B
+
1/4 LT1079
7
CD4016B
13 5 6
11
4
11
1
3V TO 18V 3V TO 18V
1M100k10k1.11k
IN
LT1078/79 • TA09
ERROR DUE TO SWITCH ON RESISTANCE,
LEAKAGE CURRENT, NOISE AND TRANSIENTS
ARE ELIMINATED
CD4016B
GAIN PIN 13 PIN 5 PIN 6
1000 HIGH LOW LOW
100 LOW HIGH LOW
10 LOW LOW HIGH
15
LT1078/LT1079
10789fe
TYPICAL APPLICATIONS
U
Single Supply, Micropower, Second Order Lowpass Filter with 60Hz Notch
+
+
6
5
7
1/2 LT1078
2.64M
0.1%
2.64M
0.1%
1/2 LT1078
3
2
1
OUTPUT
TYPICAL OFFSET
600µV
LT1078/79 • TA10
5V
8
4
1.35M
0.1%
IN
2000pF
0.5%
1000pF
0.5%
1000pF
0.5%
0.02µF
5.1M
1% 120k
5%
100pF
0.01µF
27.6k
0.1%
27.6k
0.1%
f
C
= 40Hz
Q > 30
Micropower Multiplier/Divider
+
6
5
13
12
1/4 LT1079
4
11
714
+
2
31/4 LT1079 1
+
9
10 1/4 LT1079 8
1.5V TO –9V
9V
505k
0.1% 505k
0.1%
505k
0.1%
220pF 220pF
30k
5%
30k
5%
Q1
+
220pF
30k
5%
Y INPUT
(5mV TO 50V)
X INPUT
(5mV TO 50V)
Q2 Q4
499k
0.5%
10k
GAIN
Z INPUT
(5mV TO 50V)
OUTPUT
(5mV TO 8V)
1/4 LT1079
Q1,Q2, Q3, Q4 = MAT-04
TYPICAL LINEARITY = 0.01% OF FULL-SCALE OUTPUT
Q3
OUTPUT = , POSITIVE INPUTS ONLY
(X)(Y)
(Z)
NEGATIVE SUPPLY CURRENT = 165µA + X + Y+ Z + OUT
500k
POSITIVE SUPPLY CURRENT = 165µA +
BANDWIDTH (< 3VP-P SIGNAL): X AND Y INPUTS = 10kHz
Z INPUT = 4kHz
OUT
500k
LT1078/79 • TA11
16
LT1078/LT1079
10789fe
TYPICAL APPLICATIONS
U
Micropower Dead Zone Generator
+
2
3
1
1/4 LT1079
510k
1M**
1M** 1M*
Q1
2N4393
+
6
5
7
1/4 LT1079
+
9
10
8
1/4 LT1079
+
13
12
14
1/4 LT1079
1M**
Q4
Q2 Q3
470k
1M*
GAIN
200k
510k
1M**
510k
4
11
9V
1M
1M 680k
1M
1N914
1N914
Q5
–9V
Q6
2N4393
1000pF
V
SET
DEAD ZONE
CONTROL INPUT
0.4V TO 5V
V
OUT
LT1078/79 • TA12
BIPOLAR SYMMETRY IS EXCELLENT
BECAUSE ONE DEVICE, Q2,
SETS BOTH LIMITS
SUPPLY CURRENT 240µA
BANDWIDTH = 150kHz
INPUT
*
**1% FILM
RATIO MATCH 0.05%
Q2, Q3, Q4, Q5 CA3096 TRANSISTOR ARRAY
V
SET
V
SET
V
OUT
V
IN
17
LT1078/LT1079
10789fe
TYPICAL APPLICATIONS
U
Platinum RTD Signal Conditioner with Curvature Correction
+
3
2
1
8
4
1/2 LT1078
LT1004-1.2
+
6
5
7
1/2 LT1078
13k*
12.3k*
1k**
1k**
1k**
R
P
1k AT
0°C
43.2k**
1.21M*
(SELECT AT 110°C)
5k
220°C
TRIM
1µF
10k*
50k
5°C
TRIM
1µF
0.02V TO 2.2V
OUT
=
2°C TO 220°C ±0.1°C
3V (LITHIUM)
R
P
**
*
= ROSEMOUNT 118MF
= TRW MAR-6 0.1%
= 1% METAL FILM
LT1078/79 • TA14
Lead-Acid Low-Battery Detector with System Shutdown
+
+
2
3
1
6
5
7
8
4
1/2 LT1078
1/2 LT1078
2M
1% 2M
1%
255k
1% 280k
1%
910k
5%
LT1004-1.2
LO = BATTERY LOW
(IF V
S
< 10.90V)
LO = SYSTEM SHUTDOWN
(IF V
S
< 10.05V)
BATTERY
OUTPUT
LT1078/79 • TA13
TOTAL SUPPLY CURRENT = 105µA
12V
18
LT1078/LT1079
10789fe
OBSOLETE PACKAGE
SCHEMATIC
WW
SI PLIFIED
1/2 LT1078, 1/4 LT1079
10k 10k 2.2k 5.6k
Q5 Q6
Q11
600
600
Q1
Q21
Q2
Q22
Q9
C2
175pF
6.2k
Q7
Q28
4
1
Q12
Q3
Q16 Q14
Q29
Q4 Q24
8.6k C1
50pF
C5
2.5pF
Q27
V
+
Q10 Q17
Q8
6.2k
Q19
Q18
Q15 Q32
1.3k 3.6k
Q37
Q30
13
Q25
C4
4pF 2.9k
3k
Q31
C3
40pF
Q23
Q20
1.35k 30
Q34
Q36
OUT
Q26
30
Q35
5k
Q54
112
150k
Q33
10k
V
+
Q38
5.35k
Q45 Q55
Q51
Q42
Q44
V
+
V
Q46
Q47
11.5k
V
+
12.5k
Q40
Q41
Q48
9.1k
Q43
V
700k
700k
LT1078/79 • SIMPLIFIED SCHEM
IN
IN
+
Q50 Q49
J1
Q39
Q53
Q52
H8 (TO-5) 0.230 PCD 1197
0.050
(1.270)
MAX
0.016 – 0.021**
(0.406 – 0.533)
0.010 – 0.045*
(0.254 – 1.143)
SEATING
PLANE
0.040
(1.016)
MAX 0.165 – 0.185
(4.191 – 4.699)
GAUGE
PLANE
REFERENCE
PLANE
0.500 – 0.750
(12.700 – 19.050)
0.305 – 0.335
(7.747 – 8.509)
0.335 – 0.370
(8.509 – 9.398)
DIA
LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE
AND 0.045" BELOW THE REFERENCE PLANE
FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS 0.016 – 0.024
(0.406 – 0.610)
*
**
0.230
(5.842)
TYP
0.027 – 0.045
(0.686 – 1.143)
0.028 – 0.034
(0.711 – 0.864)
0.110 – 0.160
(2.794 – 4.064)
INSULATING
STANDOFF
45°TYP PIN 1
H Package
8-Lead TO-5 Metal Can (.230 Inch PCD)
(Reference LTC DWG # 05-08-1321)
PACKAGE DESCRIPTIO
U
19
LT1078/LT1079
10789fe
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
OBSOLETE PACKAGES
J8 1298
0.014 – 0.026
(0.360 – 0.660)
0.200
(5.080)
MAX
0.015 – 0.060
(0.381 – 1.524)
0.125
3.175
MIN
0.100
(2.54)
BSC
0.300 BSC
(0.762 BSC)
0.008 – 0.018
(0.203 – 0.457) 0° – 15°
0.005
(0.127)
MIN
0.405
(10.287)
MAX
0.220 – 0.310
(5.588 – 7.874)
1234
8765
0.025
(0.635)
RAD TYP
0.045 – 0.068
(1.143 – 1.727)
FULL LEAD
OPTION
0.023 – 0.045
(0.584 – 1.143)
HALF LEAD
OPTION
CORNER LEADS OPTION
(4 PLCS)
0.045 – 0.065
(1.143 – 1.651)
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
J14 1298
0.045 – 0.065
(1.143 – 1.651)
0.100
(2.54)
BSC
0.014 – 0.026
(0.360 – 0.660)
0.200
(5.080)
MAX
0.015 – 0.060
(0.381 – 1.524)
0.125
(3.175)
MIN
0.300 BSC
(0.762 BSC)
0.008 – 0.018
(0.203 – 0.457) 0° – 15°
1234567
0.220 – 0.310
(5.588 – 7.874)
0.785
(19.939)
MAX
0.005
(0.127)
MIN 14 11 891013 12
0.025
(0.635)
RAD TYP
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
J8 Package
8-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
J Package
14-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
PACKAGE DESCRIPTIO
U
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
N8 1098
0.100
(2.54)
BSC
0.065
(1.651)
TYP
0.045 – 0.065
(1.143 – 1.651)
0.130 ± 0.005
(3.302 ± 0.127)
0.020
(0.508)
MIN
0.018 ± 0.003
(0.457 ± 0.076)
0.125
(3.175)
MIN
0.009 – 0.015
(0.229 – 0.381)
0.300 – 0.325
(7.620 – 8.255)
0.325 +0.035
–0.015
+0.889
–0.381
8.255
()
12 34
8765
0.255 ± 0.015*
(6.477 ± 0.381)
0.400*
(10.160)
MAX
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
20
LT1078/LT1079
10789fe
LT/CPI 1201 1.5K REV E • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1994
PACKAGE DESCRIPTION
U
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
SW Package
16-Lead Plastic Small Outline (Wide .300 Inch)
(Reference LTC DWG # 05-08-1620)
N Package
14-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
FAX: (408) 434-0507
www.linear.com
N14 1098
0.020
(0.508)
MIN
0.125
(3.175)
MIN
0.130 ± 0.005
(3.302 ± 0.127)
0.045 – 0.065
(1.143 – 1.651)
0.065
(1.651)
TYP
0.018 ± 0.003
(0.457 ± 0.076)
0.100
(2.54)
BSC
0.005
(0.125)
MIN
0.009 – 0.015
(0.229 – 0.381)
0.300 – 0.325
(7.620 – 8.255)
0.325 +0.035
–0.015
+0.889
–0.381
8.255
()
0.255 ± 0.015*
(6.477 ± 0.381)
0.770*
(19.558)
MAX
31 24567
8910
11
1213
14
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
0.016 – 0.050
(0.406 – 1.270)
0.010 – 0.020
(0.254 – 0.508)× 45°
0°– 8° TYP
0.008 – 0.010
(0.203 – 0.254)
SO8 1298
0.053 – 0.069
(1.346 – 1.752)
0.014 – 0.019
(0.355 – 0.483)
TYP
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
BSC
1234
0.150 – 0.157**
(3.810 – 3.988)
8765
0.189 – 0.197*
(4.801 – 5.004)
0.228 – 0.244
(5.791 – 6.197)
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
*
**
S16 (WIDE) 1098
NOTE 1
0.398 – 0.413*
(10.109 – 10.490)
16 15 14 13 12 11 10 9
12345678
0.394 – 0.419
(10.007 – 10.643)
0.037 – 0.045
(0.940 – 1.143)
0.004 – 0.012
(0.102 – 0.305)
0.093 – 0.104
(2.362 – 2.642)
0.050
(1.270)
BSC 0.014 – 0.019
(0.356 – 0.482)
TYP
0° – 8° TYP
NOTE 1
0.009 – 0.013
(0.229 – 0.330) 0.016 – 0.050
(0.406 – 1.270)
0.291 – 0.299**
(7.391 – 7.595)
× 45°
0.010 – 0.029
(0.254 – 0.737)
NOTE:
1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
*
**