MAX9634

nanoPower, 4-Bump UCSP/SOT23, Precision Current-Sense Amplifier

Industry's Smallest Current-Sense Amp: 1mm x 1mm with ICC < 1µA, VOS < 250µV, Gain Error < 0.5%


Please check latest availability status for a specific part variant.

Description

The MAX9634 high-side current-sense amplifier offers precision accuracy specifications of VOS less than 250µV (max) and gain error less than 0.5% (max). Quiescent supply current is an ultra-low 1µA. The MAX9634 fits in a tiny, 1mm x 1mm UCSP™ package size or a 5-pin SOT23 package, making the part ideal for applications in notebook computers, cell phones, PDAs, and all battery-operated portable devices where accuracy, low quiescent current, and small size are critical.

The MAX9634 features an input common-mode voltage range from 1.6V to 28V. These current-sense amplifiers have a voltage output and are offered in four gain versions: 25V/V (MAX9634T), 50V/V (MAX9634F), 100V/V (MAX9634H), and 200V/V (MAX9634W).

The four gain selections offer flexibility in the choice of the external current-sense resistor. The very low 250µV (max) input offset voltage allows small 25mV to 50mV full-scale VSENSE voltage for very low voltage drop at full-current measurement.

The MAX9634 is offered in tiny 4-bump UCSP (1mm x 1mm x 0.6mm footprint) and 5-pin SOT23 packages specified for operation over the -40°C to +85°C extended temperature range.
MAX9634: Typical Operating Circuit MAX9634: Typical Operating Circuit Enlarge+

Key Features

  • Ultra-Low Supply Current of 1µA (max)
  • Low 250µV (max) Input Offset Voltage
  • Low < 0.5% (max) Gain Error
  • Input Common Mode: +1.6V to +28V
  • Voltage Output
  • Four Gain Versions Available
    • 25V/V (MAX9634T)
    • 50V/V (MAX9634F)
    • 100V/V (MAX9634H)
    • 200V/V (MAX9634W)
  • Tiny 1mm x 1mm x 0.6mm, 4-Bump UCSP or 5-Pin SOT23 Packages

Applications/Uses

  • Cell Phones
  • Notebook Computers
  • PDAs
  • Portable/Battery-Powered Systems
  • Power-Management Systems
Part NumberOutput FormatCMVR
(V)
CMVR
(V)
VCC
(V)
VCC
(V)
ICC
(µA)
Bi-Dir. Curr. SenseVSENSE_FS
(mV)
VOS @25°C
(µV)
GainGain Accuracy @25°C
(%)
BW
(kHz)
Comp-
arators
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxminmaxtyprecomm.maxmax@ -3dBSee Notes
MAX9634 Voltage1.6281.6280.5No
25
50
100
250
100 V/V
200 V/V
25 V/V
50 V/V
0.5
15
30
60
125
0-40 to +85
SOT23/5
UCSP (R)/4
WLP/4
$0.71 @1k
See All Current Sense Amplifiers (51)
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.


MAX9634EVKIT: Evaluation Kit for the MAX9634
MAXNANOPWRBD: Evaluation Kit for the MAX32660, MAX11615, MAX40018, MAX9119, MAX9634, MAX17222
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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