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MAX9943

High-Voltage, Precision, Low-Power Op Amps

Excellent Combination of Low Power and Precision in a Small Package

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Overview

Description

The MAX9943/MAX9944 is a family of high-voltage amplifiers that offers precision, low drift, and low power consumption.

The MAX9943 (single) and MAX9944 (dual) op amps offer 2.4MHz of gain-bandwidth product with only 550µA of supply current per amplifier.

The MAX9943/MAX9944 family has a wide power supply range operating from ±3V to ±19V dual supplies or a 6V to 38V single supply.

The MAX9943/MAX9944 are ideal for sensor signal conditioning, high-performance industrial instrumentation and loop-powered systems (e.g., 4mA–20mA transmitters).

The MAX9943 is offered in a space-saving 6-pin TDFN or 8-pin µMAX® package. The MAX9944 is offered in an 8-pin SO or an 8-pin TDFN package. These devices are specified over the -40°C to +125°C automotive temperature range.

MAX9943, MAX9944: Typical ±20mA Current-Source in Loop-Powered Systems

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Key Features

Wide 6V to 38V Supply Range
Low 100µV (max) Input Offset Voltage
Low 0.4µV/°C Offset Drift
Unity Gain Stable with 1nF Load Capacitance
2.4MHz Gain-Bandwidth Product
550µA Supply Current
20mA Output Current
Rail-to-Rail Output
Package Options
- 3mm x 5mm, 8-Pin µMAX or 3mm x 3mm, 6-Pin TDFN Packages (Single)
- 5mm x 6mm, 8-Pin SO or 3mm x 3mm, 8-Pin TDFN Packages (Dual)

Applications/Uses

Amplifiers
Automatic Test Equipment (ATE)
Displays: Industrial, Front Panel, and Instrumentation
High-Performance ADC/DAC Input/Output
High-Voltage ATE
Industrial Instrumentation
Industrial: Process Measurement and Control
Loop-Powered Systems
Panel Meters
Power Meters
Programmable Logic Controllers (PLCs)
Sensor Interfaces

Parametric Specs

Part Number

Amps.

Rail to Rail

V_SUPPLY (Total)
(V)

I_CC per Amp.
(µA)

V_OS
(µV)

CMRR @DC
(dB)

PSRR @DC
(dB)

Input I_BIAS
(nA)

Unity Gain BW
(MHz)

Slew Rate
(V/µs)

e_n
(nV/√Hz)

Package/Pins

Budgetary
Price

min

max

typ

max

typ

max

typ

See Notes

MAX9943

Output Only

550

100

125

130

2.4

0.35

17.6

TDFN/6

UMAX/8

$1.08 @1k

MAX9944

SOIC (N)/8

TDFN/8

$1.65 @1k

See All Operational Amplifiers (174)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

MAX9943EVKIT: Evaluation Kit for the MAX9943

Quality And Environmental

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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Environmental Management System >

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Related Resources

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Type	ID	Title
App Note	6076	High-Voltage Battery Charger with Frequency Sync Input
Tutorial	4701	Introduction to Programmable Logic Controllers (PLCs) and the Operational Function of Main System Modules
Tutorial	4699	Overview of Sensor Signal Paths
App Note	4639	Use High-Performance Simultaneous-Sampling ADCs for Sensor Signal Conditioning in Industrial Multichannel Data Acquisition Systems (DASs)
Tutorial	4394	How to Use High-Voltage and High-Current-Drive Op Amps in ±20mA or 4–20mA Current-Loop Systems
App Note	731	Overload Circuitry Protects Batteries and Power Supplies

Technical Docs

Reference Designs

Type	ID	Title
Evaluation Board	6603	MAX9943EVKIT Evaluation Kit for the MAX9943