EL8172 Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifiers

EL8172

Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifiers

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	Technical Documentation		Tools And Support
	Pricing / Samples		Related Devices

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	EL8172FSZ

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	EL8172FSZ	Details
	EL8172FSZ-T7	Details
	EL8172FSZ-T7A	Details

Datasheet
	EL8172
	Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifiers

BW (MHz)

.17

SR (V/μs)

.55

V_S (min) (V)

2.4

V_S (max) (V)

5.5

I_S (per amp) (mA)

.095

Noise V_N (nV/√Hz)

I_BIAS (μA)

.00001

V_OS (max) (mV)

# of Devices/ Channels

I_OUT (mA)

V_OUT (V)

4.99

Rail-to-Rail Input

Rail-to-Rail Output

PSRR (dB)

104

CMRR (dB)

100

Gain A_V (min)

100

Enable

Gain Error (%)

Product Information

Key Features

95μA maximum supply current
Maximum input offset voltage
- 300μV (EL8172)
- 1500μV (EL8171)
50pA maximum input bias current
450kHz -3dB bandwidth (G = 10)
170kHz -3dB bandwidth (G = 100)
Single supply operation
- Input voltage range is rail-to-rail
- Output swings rail-to-rail
- Ground sensing
Pb-free (RoHS compliant)

Description

The EL8171 and EL8172 are micropower instrumentation amplifiers optimized for single supply operation over the +2.4V to +5.5V range. Inputs and outputs can operate rail-to-rail. As with all instrumentation amplifiers, a pair of inputs provide very high common-mode rejection and are completely independent from a pair of feedback terminals. The feedback terminals allow zero input to be translated to any output offset, including ground. A feedback divider controls the overall gain of the amplifier.

The EL8172 is compensated for a gain of 100 or more, and the EL8171 is compensated for a gain of 10 or more. The EL8171 and EL8172 have PMOS input devices that provide sub-nA input bias currents.

The amplifiers can be operated from one lithium cell or two Ni-Cd batteries. The EL8171 and EL8172 input range goes from below ground to slightly above positive rail. The output stage swings completely to ground (ground sensing) or positive supply - no pull-up or pull-down resistors are needed.

Pricing / Packaging / Samples / Ordering

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Check distributor inventory	Available in RoHS/Pb-Free

	Part No.	Design-In Status	Temp.	Package	MSL	Price US $

	EL8172FSZ	Active	Full-Range Ind	8 Ld SOIC	3	1.14

	EL8172FSZ-T7	Active	Full-Range Ind	8 Ld SOIC T+R	3	1.14

	EL8172FSZ-T7A	Active	Full-Range Ind	8 Ld SOIC T+R	3	1.25

	EL8172IS	InActive	Ind	8 Ld SOIC	1	N/A

	EL8172IS-T13	InActive	Ind	8 Ld SOIC T+R	1	N/A

	EL8172IS-T7	InActive	Ind	8 Ld SOIC T+R	1	N/A

	EL8172ISZ	InActive	Ind	8 Ld SOIC	3	N/A

	EL8172ISZ-T13	InActive	Ind	8 Ld SOIC T+R	3	N/A

	EL8172ISZ-T7	InActive	Ind	8 Ld SOIC T+R	3	N/A

The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.
MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020
SMD = Standard Microcircuit Drawing

Technical Documentation

Application Note(s):
Building an Accurate SPICE Model for Low Noise, Low Power Precision Amplifiers From SPICE Netlist to Allegro Design Sub-circuit Instrumentation Amplifier Application Note Making Accurate Voltage Noise and Current Noise Measurements on Operational Amplifiers Down to 0.1Hz Radiated Interference in Audio Circuits
Datasheet(s):
Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifiers
Technical Homepage:
Amplifiers/Buffers Precision Analog Homepage

Tools And Support
iSim Design Simulation
iSim:PE Users Guide

Application Block Diagrams

Applications

Battery- or solar-powered systems
Strain gauges
Current monitors
Thermocouple amplifiers

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Parametric Table

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