ISL28274 Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifier and Precision Operational Amplifier

ISL28274

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Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifier and Precision Operational Amplifier

Datasheets,
Related Docs
& Simulations

Ordering Information

iBuy direct from Intersil	iBuy direct - out of stock	Request samples
Check distributor inventory	Available in RoHS/Pb-Free

Part No.

Design-In
Status

Temp.

Package

MSL

Price
US $

ISL28274FAZ

Active

Full-Range Ind

16 Ld QSOP

1.84

ISL28274FAZ-T7

Active

Full-Range Ind

16 Ld QSOP T+R

1.84

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

Description

The ISL28274 is a combination of a micropower instrumentation amplifier (Amp A) with a low power precision amplifier (Amp B) in a single package. The ISL28474 consists of two micropower instrumentation amplifiers (Amp A) and two low power precision amplifiers (Amp B) in a single package. The amplifiers are optimized for operation at 2.4V to 5V single supplies. Inputs and outputs can operate rail-to-rail. As with all instrumentation amplifiers, a pair of inputs provide a 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 additional precision amplifier can be used to generate higher gain, with smaller feedback resistors or used to generate a reference voltage.

The instrumentation amp (Amp A) is compensated for a gain of 100 or more and the precision amp (Amp B) is unity gain stable. Both amplifiers have PMOS inputs that provide less than 30pA input bias currents.

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

Key Features

Combination of IN-AMP and OP-AMP in a Single Package
120μA Supply Current for ISL28274
Input Offset Voltage IN-AMP 500μV Max
Input Offset Voltage OP-AMP 225μV Max
30pA Max Input Bias Current
100dB CMRR and PSRR
Single Supply Operation of 2.4V to 5.0V
Ground Sensing
Input Voltage Range is Rail-to-Rail and Output Swings Rail-to-Rail
Pb-Free available (RoHS Compliant)

Related Documentation

Datasheet(s):
Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifier and Precision Operational Amplifier

Evaluation Board(s):
ISL28474EVAL1Z Evaluation Board User's Guide

Technical Homepage:
Amplifiers/Buffers

Parametric Data


# of Devices/ Channels		2

INA BW @ -3dB or GBWP (MHz)		6

OPA BW @ -3dB or GBWP (MHz)		.3

INA Slew Rate (V/μs)		±0.5

OPA Slew Rate (V/μs)		±0.14

V_S (min) (V)		2.4

V_S (max) (V)		5

INA V_N (nV/√Hz)		78

OPA V_N (nV/√Hz)		50

Rail-to-Rail		RRIO

INA Gain A_V (min)		100

OPA Gain A_V (min)		1

I_S (mA)		.078

I_BIAS (μA)		.00003

I_OUT (mA)		26

INA V_OS (max) (mV)		.4

OPA V_OS (max) (mV)		.225

INA Gain Error (%)		.2

Enable		N

CMRR (dB)		100

PSRR (dB)		100

Application Block Diagrams

Applications

4mA to 20mA Loops
Industrial Process Control
Medical Instrumentation

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Parametric Table

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	ISL28474		Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifier and Precision Operational Amplifier