MAX9634 Precision Current Sense Amplifier Datasheet and Application Circuit

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

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Overview

The MAX9634 is a high-accuracy, high-side current-sense amplifier with a VOS of less than 250μV (max), a gain error of less than 0.5% (max), and a quiescent supply current of only 1μA. Available in a tiny 1mm x 1mm UCSP package or a 5-lead SOT23 package, it is ideal for notebooks, cell phones, PDAs and all battery-powered portable devices that require high precision, low quiescent current and small size.

The MAX9634 provides an input common-mode voltage range of 1.6V to 28V. The family of current sense amplifiers has a voltage output and is available in four gain versions: 25V/V (MAX9634T), 50V/V (MAX9634F), 100V/V (MAX9634H), and 200V/V (MAX9634W).

Four gain options provide great flexibility in the selection of external sense resistors. The extremely low 250μV (max) input offset voltage allows a small 25mV to 50mV rail-to-rail VSENSE voltage to maintain an extremely low voltage drop over the entire current measurement range.

The MAX9634 is available in a tiny 4-bump UCSP (1mm x 1mm x 0.6mm package) and 5-lead SOT23 package and is fully specified over the -40°C to +85°C extended temperature range.

Key characteristics

1μA (max) ultra low supply current
Low gain error input common mode range of 250μV (max) low input offset voltage less than 0.5% (max): +1.6V to +28V
Voltage output provides 4 gain versions

• 25V/V (MAX9634T)
• 50V/V (MAX9634F)
• 100V/V (MAX9634H)
• 200V/V (MAX9634W)

Miniature 1mm x 1mm x 0.6mm, 4-bump UCSP or 5-lead SOT23 package

Application/use

Cellular phone laptop
PDA
Portable/Battery-Powered System Power Management System

MAX9634 Application Circuit

Download information for MAX9634:

The MAX9634 data sheet is available in PDF!