EL8176FIZ-T7 - Intersil Corporation

FN7436.8

EL8176

Micropower Single Supply Rail-to-Rail

Input-Output Precision Op Amp

The EL8176 is a precision low power, operational amplifier.

The device is optimized for single supply operation between

2.4V to 5.5V.

The EL8176 draws minimal supply current while meeting

excellent DC-accuracy noise and output drive specifications.

Competing devices seriously degrade these parameters to

achieve micropower supply current.

The EL8176 can be operated from one lithium cell or two

Ni-Cd batteries. The input range includes both positive and

negative rail. The output swings to both rails.

Features

• 55µA supply current

• 100µV max offset voltage (8 Ld SO)

• 2nA input bias current

• 400kHz gain-bandwidth product

• Single supply operation down to 2.4V

• Rail-to-rail input and output

• Output sources 31 mA an d sinks 26mA load curr ent

• Pb-free plus (RoHS compliant)

Applications

• Battery- or solar-powered systems

• 4mA to 20mA current loops

• Handheld consumer products

• Medical devices

• Thermocouple amplifiers

• Photodiode pre amps

• pH probe amplifiers

Ordering Information

PART

NUMBER PART

MARKING PACKAGE

(Pb-Free) PKG.

DWG. #

EL8176FWZ-T7*

(Note 1) BBVA 6 Ld SOT-23 MDP0038

EL8176FWZ-T7A*

(Note 1) BBVA 6 Ld SOT-23 MDP0038

EL8176FSZ

(Note 1) 8176FSZ 8 Ld SO MDP0027

EL8176FSZ-T7*

(Note 1) 8176FSZ 8 Ld SO MDP0027

EL8176FIZ-T7*

(Note 2) 176Z 6 Ld WLCSP

(1.5mmx1.0mm) W3x2.6C

*Please refer to TB347 for details on reel specifications.

NOTES:

1. These Intersil Pb-free plastic packaged products employ special

Pb-free material sets, molding compounds/die attach materials,

and 100% matte tin plate plus anneal (e3 termination finish,

which is RoHS compliant and compatible with both SnPb and

Pb-free soldering operations). Intersil Pb-free products are MSL

classified at Pb-free peak reflow temper atures that meet or

exceed the Pb-free requirements of IPC/JEDEC J STD-020.

2. These Intersil Pb-free WLCSP and BGA packaged product s

products employ special Pb-free material sets; molding

compounds/die attach materials and SnAgCu - e1 solder ball

terminals, which are RoHS compliant and compatible with both

SnPb and Pb-free soldering operations. Intersil Pb-free WLCSP

and BGA packaged products are MSL classified at Pb-free peak

reflow temperatures that meet or exceed the Pb-free

requirements of IPC/JEDEC J STD-020.

Data Sheet April 3, 2009

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 |Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

2FN7436.8

April 3, 2009

Pinouts

EL8176

(6 LD SOT-23)

TOP VIEW

EL8176

(8 LD SO)

TOP VIEW

EL8176

(6 LD WLCSP)

TOP VIEW

OUT

V-

IN+

V+

IN-

IN+

V+

OUT

V- NC

OUT

V-

IN+

DNC*

V+

IN-

*DO NOT CONNECT

EL8176

3FN7436.8

April 3, 2009

Absolute Maximum Ratings (TA = +25°C) Thermal Information

Supply Voltage (VS) and Pwr-up Ramp Rate . . . . . . . 5.75V, 1V/µs

Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5V

Current into IN+, IN-, and EN. . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . V- - 0.5V to V+ + 0.5V

ESD Tolerance

Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3kV

Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300V

Thermal Resistance (Typical, Note 3) θJA (°C/W)

6 Ld SOT-23 Package . . . . . . . . . . . . . . . . . . . . . . . 230

6 Ld WLCSP Package . . . . . . . . . . . . . . . . . . . . . . . 130

8 Ld SO Package. . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Ambient Operating Temperature Range . . . . . . . . -40°C to +125°C

Storage Temperature R ange . . . . . . . . . . . . . . . . . -65°C to +150°C

Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . +125°C

Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and

result in failures not covered by warranty.

NOTES:

3. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.

IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests

are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA

Electrical Specifications V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open, VEN = 0V, TA = +25°C unless otherwise specified.

Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data

established by characterization.

PARAMETER DESCRIPTION CONDITIONS MIN

(Note 4) TYP MAX

(Note 4) UNIT

DC SPECIFICAT IONS

VOS Input Offset Voltage 8 Ld SO -100 ±25 100 µV

-220 220 µV

6 Ld SOT-23 -350 ±80 350 µV

-350 350 µV

WLCSP -500 -75 500 µV

Long Term Input Offset Voltage Stability 2.4 µV/Mo

Input Offset Drift vs Temperature 0.7 µV/°C

IOS Input Offset Current -1 ±0.4 1 nA

-4 4 nA

IBInput Bias Current -2 ±0.5 2 nA

-5 5 nA

CMIR Input Voltage Range Guaranteed by CMRR test 0 5 V

CMRR Common-Mode Rejection Ratio VCM = 0V to 5V 90 110 dB

90 dB

PSRR Power Supply Rejection Ratio VS = 2.4V to 5.5V 90 110 dB

90 dB

AVOL Large Signal Voltage Gain VO = 0.5V to 4.5V, RL = 100kΩ200 500 V/mV

200 V/mV

VO = 0.5V to 4.5V, RL = 1kΩ25 V/mV

ΔVOS

ΔTime

------------------

ΔVOS

ΔT

----------------

EL8176

4FN7436.8

April 3, 2009

VOUT Maximum Output Voltage Swing

SOT-23/SO-8 VOL; Output low, RL = 100kΩ38mV

10 mV

VOL; Output low, RL = 1kΩ130 200 mV

300 mV

VOH; Output high, RL = 100kΩ4.994 4.997 V

4.992 V

VOH; Output high, RL = 1kΩ4.750 4.867 V

4.7 V

Maximum Output Voltage Swing

WLCSP VOL; Output low, RL = 100kΩ38mV

10 mV

VOL; Output low, RL = 1kΩ130 200 mV

300 mV

VOH; Output high, RL = 100kΩ4.991 4.997 V

VOH; Output high, RL = 1kΩ4.750 4.867 V

4.7 V

IS,ON Supply Current, Enabled VEN = 5V, SOT-23/SO-8 35 55 75 µA

30 90 µA

VEN = 5V, WLCSP 60 85 110 µA

55 120 µA

IS,OFF Supply Current, Disabled VEN = 0V, SOT-23/SO-8 only 3 10 µA

10 µA

IO+ Short Circuit Output Sourcing Current RL = 10Ω18 31 mA

18 mA

IO- Short Circuit Output Sinking Current RL = 10Ω17 26 mA

15 mA

VSSupply Voltage Guaranteed by PSRR test 2.4 5.5 V

2.4 5.5 V

VINH Enable Pin High Level SOT-23 and SO packages only 2 V

VINL Enable Pin Low Level SOT-23 and SO packages only 0.8 V

IENH Enable Pin Input Current VEN = 5V,

SOT-23 and SO packages only 0.25 0.7 2.0 µA

2.5 µA

IENL Enable Pin Input Current VEN = 0V,

SOT-23 and SO packages only -0.5 0 +0.5 µA

-1 +1 µA

AC SPECIFICAT IONS

GBW Gain Bandwidth Product AV = 100, RF = 100kΩ, RL = 10kΩ,

RG=1kΩ to VCM 400 kHz

Unity Gain

Bandwidth -3dB Bandwidth AV = 1, RF = 0Ω, RL = 100kΩ to VCM,

VOUT = 10mVP-P 1MHz

Electrical Specifications V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open, VEN = 0V, TA = +25°C unless otherwise specified.

Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data

established by characterization. (Continued)

PARAMETER DESCRIPTION CONDITIONS MIN

(Note 4) TYP MAX

(Note 4) UNIT

EL8176

5FN7436.8

April 3, 2009

eNInput Noise Voltage Peak-to-Peak f = 0.1Hz to 10Hz, RL = 10kΩ to VCM 1.5 µVP-P

Input Noise Voltage Density fO = 1kHz 28 nV/√Hz

iNInput Noise Current Density fO = 1kHz 0.16 pA/√Hz

ISO Off-State Input to Output Isolation VEN = 5V, fO = 1kHz, AV = +1, VIN = 1VP-P

SOT-23 and SO packages only -73 dB

CMRR Input Common Mode Rejection Ratio fO = 120Hz; VCM = 1VP-P, -70 dB

PSRR+ Power Supply Rejection Ratio (V+)f

O = 120Hz; V+, V- = ±2.5V,

VSOURCE =1V

P-P -90 dB

PSRR- Power Supply Rejection Ratio (V-)f

O = 120Hz; V+, V- = ±2.5V,

VSOURCE =1V

P-P -70 dB

TRANSIENT RESPONSE

SR Slew Rate ±0.065 ±0.13 ±0.3 V/µs

tr, tf, Large

Signal Rise Time, 10% to 90%, VOUT AV

= +2,

VOUT = 2VP-P, Rg = Rf = R

10kΩ

to VCM 18 µs

Fall Time, 90% to 10%, VOUT AV

= +2,

VOUT = 2VP-P, Rg = Rf = R

10kΩ

to VCM 19 µs

tr, tf, Small

Signal Rise Time, 10% to 90%, VOUT AV

= +2,

VOUT = 10mVP-P,

Rg = Rf = R

10kΩ to VCM 2.4 µs

Fall Time, 90% to 10%, VOUT AV

= +2,

VOUT = 10mVP-P,

Rg = Rf = R

10kΩ to VCM 2.4 µs

tEN Enable to Output Turn-on Delay T ime, 10%

EN to 10% VOUT (SOT-23, SO packages) VEN = 5V to 0V, AV

= +2,

Rg = Rf = R

10kΩ to VCM 4µs

Enable to Output Turn-of f Delay Time, 10%

EN to 10% VOUT (SOT-23, SO packages) VEN = 0V to 5V, AV

= +2,

Rg = Rf = R

10kΩ to VCM 0.1 µs

NOTE:

4. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. T emperature limits established by characterization

and are not production tested.

Electrical Specifications V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open, VEN = 0V, TA = +25°C unless otherwise specified.

Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data

established by characterization. (Continued)

PARAMETER DESCRIPTION CONDITIONS MIN

(Note 4) TYP MAX

(Note 4) UNIT

Typical Performance Curves

FIGURE 1. AVOL vs FREQUENCY @ 1kΩ LOAD FIGURE 2. AVOL vs FREQUENCY @ 100kΩ LOAD

-20

GAIN (dB)

100

10 10k 1M

FREQUENCY (Hz)

100 -150

PHASE (°)

200

150

100

-50

-100

100k1k

PHASE

GAIN

-80

GAIN (dB)

120

-40

1 1k 100k 10M

FREQUENCY (Hz)

10 -120

PHASE (°)

-40

-80

10k 1M100

EL8176

6FN7436.8

April 3, 2009

FIGURE 3. GAIN vs FREQUENCY vs FEEDBACK RESISTOR

VALUES Rf/Rg

FIGURE 4. GAIN vs FREQUENCY vs VOUT, RL = 1k

FIGURE 5. GAIN vs FREQUENCY vs VOUT, RL = 10k FIGURE 6. GAIN vs FREQUENCY vs VOUT, RL = 100k

FIGURE 7. GAIN vs FREQUENCY vs RLFIGURE 8. FREQUENCY RESPONSE vs CLOSED LOOP GAIN

Typical Performance Curves (Continued)

-9

-8

-7

-6

-5

-4

-3

-2

-1

100 1k 10k 100k 1M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

Rf = Rg = 1k

Rf = Rg = 10k

Rf = Rg = 100k

V+ = 5V

RL = 10k

AV = +2

VOUT = 10mVP-P

CL = 8.3pF

-8

-7

-6

-5

-4

-3

-2

-1

100 1k 10k 100k 1M 10M

10 FREQUENCY (Hz)

NORMALIZED GAIN (dB)

VOUT = 100mV

VOUT = 10mV

VOUT = 50mV

VOUT = 1V

V+ = 5V

RL = 1k

AV = +1

CL = 8.3pF

-7

-6

-5

-4

-3

-2

-1

100 1k 10k 100k 1M 10M

10 FREQUENCY (Hz)

NORMALIZED GAIN (dB)

-8

VOUT = 50mV

VOUT = 100mV

VOUT = 10mV

VOUT = 1V

V+ = 5V

RL = 10k

AV = +1

CL = 8.3pF -7

-6

-5

-4

-3

-2

-1

100 1k 10k 100k 1M 10M

10 FREQUENCY (Hz)

NORMALIZED GAIN (dB)

-8

VOUT = 50mV

VOUT = 100mV

VOUT = 10mV

VOUT = 1V

V+ = 5V

RL = 100k

AV = +1

CL = 8.3pF

-7

-6

-5

-4

-3

-2

-1

100 1k 10k 100k 1M 10M

10 FREQUENCY (Hz)

NORMALIZED GAIN (dB)

-8

= 100k

RL = 10k

= 1k

V+ = 5V

AV = +1

VOUT = 10mVP-P

CL = 8.3pF

100 1k 10k 100k 1M 10M

-10

AV = 1

AV = 101

AV = 1001

FREQUENCY

(Hz)

GAIN (dB)

= 1001, R

= 1k, R

= 1M

AV = 1, Rg = INF, Rf = 0

= 101, R

= 1k, R

= 100k

AV = 10

AV = 10, Rg = 1k, Rf = 9.09k

V+ = 5V

VOUT = 10mVP-P

CL = 8.3pF

RL = 10k

EL8176

7FN7436.8

April 3, 2009

FIGURE 9. GAIN vs FREQUENCY vs SUPPLY VOLTAGE FIGURE 10. GAIN vs FREQUENCY vs SUPPLY VOLTAGE

FIGURE 11. GAIN vs FREQUENCY vs CLFIGURE 12. CMRR vs FREQUENCY; V+, V- = ±2.5V

FIGURE 13. PSRR vs FREQUENCY, V+, V- = ±2.5V FIGURE 14. OFF ISOLATION vs FREQUENCY; V+, V- = ±2.5V

Typical Performance Curves (Continued)

-9

-8

-7

-6

-5

-4

-3

-2

-1

1k 10k 100k 1M 10M

FREQUENCY

(Hz)

GAIN (dB)

V+ = 2V

V+ = 2.5V

V+ = 5V

RL = 10k

AV = +1

OUT

= 10mV

P-P

CL = 8.3pF

RL = 10k

CL = 8.3pF

AV = 100

VOUT = 10mVP-P

RF = 221kΩ

RG = 2.23kΩ

100 1k 10k 100k 1M

FREQUENCY (Hz)

GAIN (dB)

V+ = 2V

V+ = 2.5V

V+ = 5V

-9

-8

-7

-6

-5

-4

-3

-2

-1

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

CL = 64.3pF

CL = 47.3pF

CL = 35.3pF

CL = 26.3pF

CL = 8.3pF

V+ = 5V

RL = 10k

AV = +1

VOUT = 10mVP-P

1k 10k 100k 1M 10M -120

-100

-80

-60

-40

-20

1 10 100 1k 10k 100k 1M

CMRR (dB)

FREQUENCY (Hz)

V+ = 5V

RL = OPEN

AV = +1

VCM = 1VP-P

CL = 8.3pF

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

1 10 100 1k 10k 100k 1M

PSRR (dB )

FREQUENCY (Hz)

V+ = 5V

RL = OPEN

AV = +1

VCM = 1VP-P

CL = 8.3pF PSRR-

PSRR+

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

1 10 100 1k 10k 100k 1M

OFF ISOLATION (dB)

FREQUENCY (Hz)

V+ = 5V

RL = OPEN

AV = +1

VIN = 1VP-P

CL = 8.3pF

10M

EL8176

8FN7436.8

April 3, 2009

FIGURE 15. INPUT VOLT AGE NOISE DENSITY vs FREQUENCY FIGURE 16. INPUT CURRENT NOISE DENSITY vs FREQUENCY

FIGURE 17. INPUT VOLTAGE NOISE 0.1Hz TO 10Hz FIGURE 18. LARGE SIGNAL STEP RESPONSE

FIGURE 19. SMALL SIGNAL STEP RESPONSE FIGURE 20. ENABLE TO OUTPUT RESPONSE

Typical Performance Curves (Continued)

100

1000

0.1 1 10 100 1k 10k

FREQUENCY (Hz)

INPUT VOLTAGE NOISE (nV√Hz)

V+ = 5V

RL = OPEN

AV = +1

CL = 8.3pF

0.1

0.1 1 10 100 1k 10k

FREQUENCY (Hz)

INPUT CURRENT NOISE (pA√Hz)

V+ = 5V

RL = OPEN

AV = +1

CL = 8.3pF

-2.0

-1.5

-1.0

-0.5

0.5

1.0

1.5

2.0

012345678910

TIME (s)

V+ = 5V

RL = OPEN

Rg = 10, Rf = 10k

AV = 1000

CL = 8.3pF

INPUT NOISE (µV)

-2.5

-2.0

-1.5

-1.0

-0.5

0.5

1.0

1.5

2.0

2.5

0 50 100 150 200 250 300 350 400

TIME (µs)

LARGE SIGNAL (V)

V+, V- = ±2.5V

RL = 10k

Rg = 10k

AV = 4

CL = 8.3pF

VOUT = 4VP-P

Rf = 30k

-2

0 50 100 150 200 250 300 350 400

TIME (µs)

SMALL SIGNAL (mV)

V+, V- = ±2.5V

RL = 10k

Rg = Rf = 10k

AV = 2

CL = 8.3pF

VOUT = 10mVP-P

-0.5

0.5

1.0

1.5

2.0

2.5

3.0

0 20 40 60 80 100 120 140 160 180 200

TIME (µs)

V-ENABLE (V)

OUTPUT (V)

-0.5

0.5

1.0

1.5

2.0

2.5

3.0

V+, V- = ±2.5V

Rg = Rf = RL = 10k

AV = +2

VOUT = 2VP-P

CL = 8.3pF

VENABLE

VOUT

EL8176

9FN7436.8

April 3, 2009

FIGURE 21 . INPUT OF FSET VOLT AGE v s COMMON-MOD E

INPUT VOLTAGE FIGURE 22. INPUT OFFSET CURRENT vs COMMON-MODE

INPUT VOLTAGE

FIGURE 23. INPUT OFFSET VOLTAGE vs OUTPUT VOLTAGE FIGURE 24. SUPPLY CURRENT vs SUPPLY VOLTAGE

FIGURE 25. SUPPL Y CURRENT vs TEMPERA TURE

VS = ±2.5V ENABLED. RL = INF FIGURE 26. SUPPL Y CURRENT vs TEMPERA TURE

VS = ±2.5V ENABLED. RL = INF

Typical Performance Curves (Continued)

-100

-80

-60

-40

-20

100

-0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

VCM (V)

VIO (µV)

V+, V- = ±2.5V

Rg = 100

AV = +11

VOUT = 2VP-P

CL = 8.3pF

Rf = 10k

RL = INF

-2.0

-1.5

-1.0

-0.5

0.5

1.0

1.5

2.0

IBIAS (µA)

-0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

VCM (V)

V+, V- = ±2.5V

Rg = 100

AV = +11

VOUT = 2VP-P

CL = 8.3pF

Rf = 10k

RL = INF

-200

INPUT OFFSET VOLTAGE (µV)

-100

150

200

100

OUTPUT VOLTAGE (V)

1324

VCM = VDD/2

AV = -1

-150

-50 VDD = 2.5V

VDD = 5V

2.0 3.5 4.0 5.5

SUPPLY VOLTAGE (V)

2.5 5.04.53.0

SUPPLY CURRENT (µA)

-40-200 20406080100120

TEMPERATURE (°C)

n = 12

MAX

MEDIAN

MIN

SO, SOT-23 PACKAGE

SUPPLY CURRENT (µA)

100

SUPPLY CURRENT (µA)

n = 12

MAX

MEDIAN

MIN

WLCSP

-40-200 20406080100120

TEMPERATURE (°C)

EL8176

10 FN7436.8

April 3, 2009

FIGURE 27. DISABLED SUPPL Y CURRENT vs

TEMPERATURE VS = ±2.5V RL= INF FIGURE 28. IBIAS (+) vs TEMPERATURE VS = ±2.5V

FIGURE 29. IBIAS (+) vs TEMPERATURE VS = ±1.2V FIGURE 30. IBIAS (-) vs TEMPERATURE VS = ±2.5V

FIGURE 31. IBIAS (-) vs TEMPERATURE VS = ±1.2V FIGURE 32. INPUT OFFSET CURRENT vs TEMPERA TURE

VS = ±2.5V

Typical Performance Curves (Continued)

-40-200 20406080100120

TEMPERATURE (°C)

n = 12

MAX

MEDIAN

MIN

DISABLED SUPPLY CURRENT (µA)

-0.5

0.5

1.0

1.5

2.0

2.5

-40-200 20406080100120

TEMPERATURE (°C)

CURRENT (nA)

n = 12

MAX

MEDIAN

MIN

-0.5

0.5

1.0

1.5

2.0

2.5

3.0

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

CURRENT (nA)

n = 12

MEDIAN

MIN

MAX

-0.5

0.5

1.0

1.5

2.0

2.5

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

CURRENT (nA)

n = 12

MIN

MEDIAN

MAX

-0.5

0.5

1.0

1.5

2.0

2.5

3.0

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

CURRENT (nA)

n = 12

MAX

MEDIAN

MIN

-0.5

0.5

1.0

1.5

2.0

2.5

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

CURRENT (nA)

n = 12

MAX

MEDIAN

MIN

EL8176

11 FN7436.8

April 3, 2009

FIGURE 33. INPUT OFFSET CURRENT vs TEMPERA TURE

VS = ±1.2V FIGURE 34. INPUT OFFSET VOLT AGE vs TEMPERATURE

VS = ±2.5V

FIGURE 35. INPUT OFFSET VOL TAGE vs TEMPERA TURE

VS = ±1.2V FIGURE 36. INPUT OFFSET VOLT AGE vs TEMPERATURE

VS = ±2.5V

FIGURE 37. INPUT OFFSET VOL TAGE vs TEMPERA TURE

VS = ±1.2V FIGURE 38. INPUT OFFSET VOLT AGE vs TEMPERATURE

VS = ±2.5V

Typical Performance Curves (Continued)

-0.5

0.5

1.0

1.5

2.0

2.5

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

CURRENT (nA)

n = 12

MAX

MEDIAN

MIN

-50

100

150

200

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

VOS (µV)

SO PACKAGE

n = 12

MAX

MEDIAN

0MIN

-50

100

150

200

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

VOS (µV)

SO PACKAGE

n = 12

MAX

MIN

MEDIAN

-200

-100

100

200

300

400

-40-200 20406080100120

TEMPERATURE (°C)

VOS (µV)

n = 12 SOT-23 PACKAGE

MAX

MEDIAN

MIN

-200

-150

-100

-50

100

150

200

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

VOS (µV)

n = 12 SOT-23 PACKAGE

MAX

MEDIAN

MIN

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

VOS (µV)

150

100

150

n = 12

MAX

MEDIAN

MIN

WLCSP

EL8176

12 FN7436.8

April 3, 2009

FIGURE 39. INPUT OFFSET VOL TAGE vs TEMPERA TURE

VS = ±1.2V FIGURE 40. CMRR vs TEMPERATURE VCM = +2.5V TO -2.5V

FIGURE 41. PSRR vs TEMPERATURE VS = ±1.2V TO ±2.5V FIGURE 42. POSITIVE VOUT vs TEMPERA TURE RL = 1k

VS = ±2.5V

FIGURE 43. NEGA TIVE VOUT vs TEMPERATURE RL = 1k

VS = ±2.5V FIGURE 44. POSITIVE VOUT vs TEMPERA TURE RL = 100k

VS = ±2.5V

Typical Performance Curves (Continued)

-150

-100

-50

100

150 n = 12

MAX

MEDIAN

MIN

WLCSP

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

VOS (µV)

100

105

110

115

120

125

-40 -20 0 20 40 60 80 100 120

TEMPERAT URE (°C)

CMRR (dB)

n = 12

MAX

MEDIAN

MIN

100

105

110

115

120

125

130

135

140

-40 -20 0 20 40 60 80 100 120

TEMPERAT URE (°C)

PSRR (dB)

n = 12

MAX

MEDIAN

MIN

4.82

4.83

4.84

4.85

4.86

4.87

4.88

4.89

4.90

4.91

-40 -20 0 20 40 60 80 100 120

VOUT (V)

n = 12

TEMPERATURE (°C)

MAX

MEDIAN

MIN

100

120

140

160

180

200

220

240

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

VOUT (mV)

n = 12

MAX MEDIAN

MIN

4.9962

4.9964

4.9966

4.9968

4.9970

4.9972

4.9974

4.9976

4.9978

4.9980

4.9982

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

VOUT (V)

n = 12

MAX

MIN

MAX

MEDIAN

EL8176

13 FN7436.8

April 3, 2009

FIGURE 45. NEGA TIVE VOUT vs TEMPERATURE RL = 100k

VS = ±2.5V FIGURE 46. +SLEW RA TE vs TEMPERATURE VS = ±2.5V

INPUT = ±0.75V, AV = 2

FIGURE 47. -SLEW RA TE vs TEMPERATURE VS = ±2.5V

INPUT = ±0.75V, AV = 2 FIGURE 48. AVOL, RL = 100k, VS ±2.5V, VO = ±2V

Pin Descriptions

SO PIN

NUMBER SOT-23 PIN

NUMBER 6 Ld WLCSP

PIN NUMBER PIN NAME EQUIVALENT

CIRCUIT DESCRIPTION

1, 5 NC No internal connection

2 4 C1 IN- Circuit 1 Amplifier’s inverting input

3 3 C2 IN+ Circuit 1 Amplifier’s non-inverting input

4 2 B2 V- Circuit 4 Negative power supply

A1 DNC Do not connect. Pin must be left floating.

6 1 A2 OUT Circuit 3 Amplifier’s output

7 6 B1 V+ Circuit 4 Positive power supply

85 EN

Circuit 2 Amplifier’s enable pin with internal pull-down; Logic “1” selects the

disabled state; Logic “0” selects the enabled state.

Typical Performance Curves (Continued)

2.5

3.0

3.5

4.0

4.5

5.0

5.5

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

VOUT (mV)

n = 12

MAX

MEDIAN MIN

0.09

0.11

0.13

0.15

0.17

0.19

0.21

0.23

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

SLEW RATE (V/µs)

n = 12

MIN

MAX MEDIAN

0.10

0.11

0.12

0.13

0.14

0.15

0.16

0.17

-40-200 20406080100120

TEMPERATURE (°C)

CURRENT (pA)

n = 12

MEDIAN

MIN

MAX

100

200

300

400

500

600

700

800

900

-40 -20 0 20 40 60 80 100 120

TEMPERATURE (°C)

AVOL (V/mV)

n = 12

MEDIAN

MAX

MIN

EN OUT

CIRCUIT 3CIRCUIT 2

CAPACITIVELY

COUPLED

ESD CLAMP

CIRCUIT 4

V+V+V+

V- V- V-

IN+IN-

V+

V-

CIRCUIT 1

EL8176

14 FN7436.8

April 3, 2009

Applications Information

Introduction

The EL8176 is a rail-to-rail inp ut and output micro-power

precision single supply operational ampl ifier with an enable

feature. The device achieves rail-to-rail input and output

operation and eliminates the concerns introduced by a

conventional rail-to-rail I/O operational amplifier as

discussed below.

Rail-to-Rail Input

The input common-mode voltage range of the EL8176 goes

from negative supply to positive supply without introducing

offset errors or degrading performance associated with a

conventional rail-to-rail input operational amplifier. Many

rail-to-rail input st ag es use two differential input pairs, a

long-tail PNP (or PFET) and an NPN (or NFET). Seve re

penalties have to be p aid fo r this circuit top olog y. As the input

signal moves from one su pply rail to anothe r, the operational

amplifier switches from one input p air to the other ca using

drastic changes in input offset volt age an d an undesi red

change in magnitude and polarity of input of fset curren t.

The EL8176 achieves input rail-to-rail without sacrificing

important precision specifications and without degrading

distortion performance. The EL8176's input offset voltage

exhibits a smooth behavior throughout the entire

common-mode input range. The input bias current versus

the common-mode voltage range for the EL8176 gives us an

undistorted behavior from typically 10mV above the negative

rail all the way up to the positi ve rail.

Input Bias Current Compensation

The input bias currents as low as 500pA are achieved while

maintaining an excellent bandwidth for a micro-power

operational amplifier. Inside the EL8176 is an input bias

canceling circuit. The input stage transistors are still biased

with an adequate current for speed but the canceling circuit

sinks most of the base current, leaving a small fraction as

input bias current. The input bias curre nt

compensation/cancellation is stable from -40°C to +125°C

and operates from typically 10mV to the positive supply rail.

Rail-to-Rail Output

A pair of complement ary MOSFET devices achieves rail-to-rail

output swing. The NMOS sinks current to swing the output in

the negative direction. The PMOS sources current to swing the

output in the positive direction. The EL8176 with a 100kΩ load

will swing to within 3mV of the supply rails.

Enable/Disable Feature

The EL8176, in the SOT-23 and SO packages, offers an EN

pin. The active low EN pin disables the device when pulled

up to at least 2.0V. When disabled, the output is in a high

impedance state and the part consumes typically 3µA. When

disabled, the high impedance output allo ws multi ple parts to

be MUXed together . When configured as a MUX, the outputs

are tied together in parallel and a channel can be selected by

pulling the EN pin to 0.8V or lower.T he EN pin has an

internal pull-down. If left open or floating, the EN pin will

internally be pulled low, enabling the part by default.

Proper Layout Maximizes Performance

To achieve th e maximum performance of the high input

impedance and low offset voltage of the EL8176, care

should be taken in the circuit board layout. The PC board

surface must remain clean and free of moisture to avoid

leakage currents between adjacent traces. Surface coating

of the circuit board will reduce surface moisture and provide

a humidity barrier, reducing parasitic resistance on the

board. The use of guard rings around the amplifier inputs will

further reduce leakage currents. Figure 49 shows how the

guard ring should be configured and Figure 50 shows the top

view of how a surface mount layout can be arranged. The

guard ring does not need to be a specific width, but it should

form a continuous loop around both inputs. By setting the

guard ring voltage equal to the voltage at the non-inverting

input, parasitic capacitance is minimized as well. For further

reduction of leakage currents, components can be mounted

to the PC board using Teflon standoff insulators.

EL8176

V+

FIGURE 49.

HIGH IMPEDANCE INPUT

FIGURE 50.

EL8176

15 FN7436.8

April 3, 2009

Typical Applications

Thermocouples are the most popular temperature-sensing

device because of their low cost, interchangeability, and

ability to measure a wide range of temperatures. The

EL8176 is used to convert the differential thermocouple

voltage into single-ended signal with 10X gain . T he

EL8176's rail-to-rail input characteristic allows the

thermocouple to be biased at ground and the converter to

run from a single 5V supply.

V+

V-

EL8176

K TYPE

THERMOCOUPLE

10kΩR3

10kΩR2

100kΩ

410µV/°C

FIGURE 51. THERMOCOUPLE AMPLIFIER

EL8176

16 FN7436.8

April 3, 2009

EL8176

Small Outline Package Family (SO)

GAUGE

PLANE

A1 L

DETAIL X 4° ±4°

SEATING

PLANE

0.010 BMCA

0.004 C

0.010 BMCA

(N/2)

NN (N/2)+1

PIN #1

I.D. MARK

h X 45°

SEE DETAIL “X”

0.010

MDP0027

SMALL OUTLINE PACKAGE FAMILY (SO)

SYMBOL

INCHES

TOLERANCE NOTESSO-8 SO-14

SO16

(0.150”)

SO16 (0.300”)

(SOL-16)

SO20

(SOL-20)

SO24

(SOL-24)

SO28

(SOL-28)

A 0.068 0.068 0.068 0.104 0.104 0.104 0.104 MAX -

A1 0.006 0.006 0.006 0.007 0.007 0.007 0.007 ±0.003 -

A2 0.057 0.057 0.057 0.092 0.092 0.092 0.092 ±0.002 -

b 0.017 0.017 0.017 0.017 0.017 0.017 0.017 ±0.003 -

c 0.009 0.009 0.009 0.011 0.011 0.011 0.011 ±0.001 -

D 0.193 0.341 0.390 0.406 0.504 0.606 0.704 ±0.004 1, 3

E 0.236 0.236 0.236 0.406 0.406 0.406 0.406 ±0.008 -

E1 0.154 0.154 0.154 0.295 0.295 0.295 0.295 ±0.004 2, 3

e 0.050 0.050 0.050 0.050 0.050 0.050 0.050 Basic -

L 0.025 0.025 0.025 0.030 0.030 0.030 0.030 ±0.009 -

L1 0.041 0.041 0.041 0.056 0.056 0.056 0.056 Basic -

h 0.013 0.013 0.013 0.020 0.020 0.020 0.020 Reference -

N 8 14 16 16 20 24 28 Reference -

Rev. M 2/07

NOTES:

1. Plastic or metal protrusions of 0.006” maximum per side are not included.

2. Plastic interlead protrusions of 0.010” maximum per side are not included.

3. Dimensions “D” and “E1” are measured at Datum Plane “H”.

4. Dimensioning and tolerancing per ASME Y14.5M-1994

17 FN7436.8

April 3, 2009

EL8176

SOT-23 Package Family

321

0.15 DC

2X 0.20 C

B0.20 MDC A-B

2 3

SEATING

PLANE

0.10 C

1 3

0.15 A-BC

(L1)

0.25

0° +3°

-0°

GAUGE

PLANE

MDP0038

SOT-23 PACKAGE FAMILY

SYMBOL

MILLIMETERS

TOLERANCESOT23-5 SOT23-6

A 1.45 1.45 MAX

A1 0.10 0.10 ±0.05

A2 1.14 1.14 ±0.15

b 0.40 0.40 ±0.05

c 0.14 0.14 ±0.06

D 2.90 2.90 Basic

E 2.80 2.80 Basic

E1 1.60 1.60 Basic

e 0.95 0.95 Basic

e1 1.90 1.90 Basic

L 0.45 0.45 ±0.10

L1 0.60 0.60 Reference

N 5 6 Reference

Rev. F 2/07

NOTES:

1. Plastic or metal protrusions of 0.25mm maximum per side are not

included.

2. Plastic interlead protrusions of 0.25mm maximum per side are not

included.

3. This dimension is measured at Datum Plane “H”.

4. Dimensioning and tolerancing per ASME Y14.5M-1994.

5. Index area - Pin #1 I.D. will be located within the indicated zone

(SOT23-6 only).

6. SOT23-5 version has no center lead (shown as a dashed line).

All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.

Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality

Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without

notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and

reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result

from its use. No lice nse is gran t ed by i mpli catio n or other wise u nder an y p a tent or patent rights of Inter sil or it s sub sidi aries.

For information regarding Intersil Corporation and its products, see www.intersil.com

FN7436.8

April 3, 2009

EL8176

Wafer Level Chip Scale Package (WLCSP)

PIN 1 ID

BOTTOM VIEW

CBAb

SIDE VIEW

TOP VIEW

SD 2

W3x2.6C

3x2 ARRAY 6 BALL WAFER LEVEL CHIP SCALE PACKAGE

SYMBOL MILLIMETERS

A 0.51 Min, 0.55 Max

A10.225 ±0.015

A20.305 ±0.013

bΦ0.323 ±0.025

D 0.955 ±0.020

D10.50 BASIC

E 1.455 ±0.020

E11.00 BASIC

e 0.50 BASIC

SD 0.25 BASIC

SE 0.00 BASIC

Rev. 3 03/08

NOTES:

1. All dimensions are in millimeters.