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Quad Low-Offset, Low-Power
Operational Amplifier
©2001 Maxwell Technologies
All rights reserve d.
OP400
09.12.02 REV 5
VOL T AGE
LIMITING
NET WORK
+IN -IN
BIAS
v+
v-
OUT
FEATURES:
•RAD-PAK® technology-hardened against natural space
• radiation
• Total dose hardness:
- > 100 krad (Si), depending upon space mission
• Package:
- 16 pin Rad-Pak® flat package
• Low input offset voltage 150µV max
• Low offset voltage drift
- +1.2µV/°C max (over -55 to +125°C)
• Low supply current (per amplifier) 725 µA max
• High open-loop gain 5000V/mV min
• Input bias current 3 nA Max
• Low noise voltage density 11 nV per (Hz)½ at 1 kHz
•Stable with large capacitive loads 10 nF typ
DESCRIPTION:
Maxwell Technologies’ OP400 monolithic quad operational
amplifier microcircuit features a greater than 100 krad (Si) typ-
ical total dose tolerance, depending upon space mission.
Using Maxwell’s radiation-hardened RAD-PAK® packaging
technology, the OP 400 has an ex tremely low input offset volt-
age no less than 150 mV with a dr ift of under 1.2 mV /°C, guar -
anteed over the full military temperature range. The OP400
features low power consumption, drawing less than 725 µ A
per amplifier.
Maxwell Technologies' patented RAD-PAK packaging technol-
ogy incorporates radiation shielding in the microcircuit pack-
age. It eliminates the need for box shielding while providing
the required radiation shielding for a lifetime in orbit or space
mission. In a GEO orbit, RAD-PAK provides greater than 100
krad (Si) radiation dose tolerance. This product is available
with screening up to Class S.
Logic Diagram
OP400
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©2001 Maxwell Technologies
All rights reserve d.
Quad Low-Offset, Low-Power Operational Amplifier
09.12.02 REV 5
TABLE 1. PINOUT DESCRIPTION
PIN SYMBOL DESCRIPTION
1, 7, 10, 16 OUT A - D Output Signal
2, 6, 11, 15 -IN A - D Negative Input Signal
3, 5, 12, 14 +IN A - D Positive Input Signal
8, 9 NC Not Connected
4 V+ Positive Voltage
13 V- Negative Voltage
TABLE 2. OP400 ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL MIN MAX UNIT
Supply Voltage VCC ±20 V
Differential Input Voltage ±30 V
Input Voltage Supply Voltage
Output Short-Circuit Duration Continuous
Storage Temperature Range TS-65 150 °C
Operating Temperature Range TA-55 125 °C
TABLE 3. DELTA LIMITS
PARAMETER VARIATION
ICC ±10% of specified value in Table 4
TABLE 4. OP400 DC ELECTRICAL CHARACTERISTICS
(VS = ±15V, TA = -55 TO 125°C, UNLESS OTHERWISE SPECIFIED)
PARAMETER SYMBOL TEST CONDITIONS SUBGROUPS MIN TYP MAX UNITS
Input Offset Voltage VOS +25°C 1 --- 40 150 µV
-55 to 125°C 2, 3 -- 70 270
Long Term Input Voltage Stability --- 1, 2, 3 --- 0.1 --- µV/mo
Input Offset Current IOS VCM = 0V +25°C 1 --- 0.1 1.0 nA
-55 to 125°C 2, 3 0.1 2.5
Input Bias Current IBVCM = 0V +25°C 1 --- 0.75 3.0 nA
-55 to 125°C 2, 3 1.30 5.0
OP400
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©2001 Maxwell Technologies
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Quad Low-Offset, Low-Power Operational Amplifier
09.12.02 REV 5
Input Resistance Differential
Mode RIN +25°C +25E = Engi-
neering (test-
ing @ +25°C)
1 --- 10 --- MΩ
Input Resistance Common Mode RINCM 1, 2, 3 --- 200 --- GΩ
Large Signal Voltage Gain AVO VO = ±10V
RL = 10
kΩ
+25°C 1 5000 12000 --- V/mV
-55 to 125°C 2, 3 3000 9000 --
RL = 2 kΩ+25°C 1 2000 3500 ---
-55 to 125°C 2, 3 1000 2300 --
Input Voltage Range 1IVR 3/ +25°C 1 ±12 ±13 --- V
-55 to 125°C 2, 3 ±12 ±12.5 --
Common Mode Rejection CMR VCM =
±12V +25°C 4 120 140 --- dB
-55 to 125°C 5, 6 115 130 --
Power Supply Rejection Ratio PSRR VS = ±3V
to ±18V +25°C 1 --- 0.1 1.8 µV/V
-55 to 125°C 1, 2, 3 -- 0.2 3.2
Output Voltage Swing VORL = 10
kΩ1, 2, 3 ±12 ±12.6 --- V
RL = 2 kΩ1, 2, 3 ±11 ±12.4 ---
Supply Current Per Amplifier ISV No Load +25°C 1 --- 600 725 µA
-55 to 125°C 2, 3 -- 600 775
Input Capacitance CIN +25°C 1 --- 3.2 --- pF
Capacitive Load Stability AV = +1
No Oscilla-
tions
+25°C 1 --- 10 --- nF
1. Guaranteed by CMR test.
TABLE 5. OP400 AC Electrical Characteristics
(VS = ±15V, TA = -55 TO 125°C, UNLESS OTHERWISE SPECIFIED.)
PARAMETER SYMBOL Test Conditions SUBGROUP MIN TYP MAX UNIT
Input Noise Voltage en p-p 0.1 Hz to 10 Hz +25°C 1 --- 0.5 --- µVP-P
Input Noise Voltage
Density enfO = 10 Hz +25°C1---22--nV√Hz
fO = 1 KHz +25°C1---11--
Input Noise Current in p-p 0.1 Hz to 10 Hz +25°C1---15---pA
P-P
Input Noise Current
Density infO = 10 Hz +25°C 1 --- 0.6 --- nV√Hz
Slew Rate SR -55 to 125°C 1, 2, 3 0.1 0.15 --- V/µs
Gain Bandwidth Product GBWP AV = +1 -55 to 125°C 1, 2, 3 --- 500 --- kHz
TABLE 4. OP400 DC ELECTRICAL CHARACTERISTICS
(VS = ±15V, TA = -55 TO 125°C, UNLESS OTHERWISE SPECIFIED)
PARAMETER SYMBOL TEST CONDITIONS SUBGROUPS MIN TYP MAX UNITS
OP400
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©2001 Maxwell Technologies
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Quad Low-Offset, Low-Power Operational Amplifier
09.12.02 REV 5
Channel Separation CS VO = 20 Vp-p
fO = 10 Hz1+25°C 4 123 135 --- dB
1. Guaranteed by design.
TABLE 5. OP400 AC Electrical Characteristics
(VS = ±15V, TA = -55 TO 125°C, UNLESS OTHERWISE SPECIFIED.)
PARAMETER SYMBOL Test Conditions SUBGROUP MIN TYP MAX UNIT
OP400
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Quad Low-Offset, Low-Power Operational Amplifier
09.12.02 REV 5
OP400 TYPICAL OPERATING CHARACTERISTICS
OP400
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©2001 Maxwell Technologies
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Quad Low-Offset, Low-Power Operational Amplifier
09.12.02 REV 5
OP400 TYPICAL OPERATING CHARACTERISTICS (CONTINUED)
OP400
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©2001 Maxwell Technologies
All rights reserve d.
Quad Low-Offset, Low-Power Operational Amplifier
09.12.02 REV 5
OP400 TYPICAL OPERATING CHARACTERISTICS (CONTINUED)
OP400
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©2001 Maxwell Technologies
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Quad Low-Offset, Low-Power Operational Amplifier
09.12.02 REV 5
Note: All dimensions in inches.
16-PIN RAK-PAK® FLAT PACKAGE
SYMBOL DIMENSION
MIN NOM MAX
A 0.115 0.135 0.150
b 0.015 0.017 0.019
c 0.004 0.005 0.007
D 0.407 0.415 0.423
E 0.275 0.280 0.285
E1 -- -- 0.500
E2 0.150 0.156 0.162
E3 0.030 0.062 --
e 0.050 BSC
L 0.325 0.335 0.345
Q 0.020 0.033 0.045
S1 0.005 0.024 0.045
N16
OP400
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All data sheets are subject to change without notice
©2001 Maxwell Technologies
All rights reserve d.
Quad Low-Offset, Low-Power Operational Amplifier
09.12.02 REV 5
Important Notice:
These data sheets are created using the chip manufacturer’s published specifications. Maxwell Technologies verifies
functionality by testing key parameters either by 100% testing, sample testing or characterization.
The specifications presented within these data sheets represent the latest and most accurate information available to
date. However, these specifications are subject to change without notice and Maxwell Technologies assumes no
responsibility for the use of this information.
Maxwell Technologies’ products are not authorized for use as critical components in life support devices or systems
without express written approval from Maxwell Technologies.
Any claim against Maxwell Technologies must be made within 90 days from the date of shipment from Maxwell Te ch-
nologies. Maxwell Technologies’ liability shall be limited to replacement of defective parts.
OP400
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All data sheets are subject to change without notice
©2001 Maxwell Technologies
All rights reserve d.
Quad Low-Offset, Low-Power Operational Amplifier
09.12.02 REV 5
Product Ordering Options
Model Number
Feature Option Details
OP400 RP F X
Screening Flow
Package
Radiation Feature
Base Product
Nomenclature
Monolithic
S = Maxwell Class S
B = Maxwell Class B
I = Industrial (testing @ -55°C,
+25°C, +125°C)
E = Engineering (testing @ +25°C)
F = Flat Pack
RP = RAD-PAK® package
Quad Low-Offset, Low Power
Operational Amplifier
