MAX9612:High-Side, Current-Sense Amplifiers with 12-Bit ADC and Op Amp/Comparator

Current-Sense Amplifiers with Digital Output and 60V Common-Mode Range

The MAX9611/MAX9612 are high-side current-sense amplifiers with an integrated 12-bit ADC and a gain block that can be configured either as an op amp or comparator, making these devices ideal for a number of industrial and automotive applications. The high-side, current-sense amplifiers operate over a wide 0V to 60V input common-mode voltage range. The programmable full-scale voltage (440mV, 110mV, and 55mV) of these amplifiers offers wide dynamic range, accurate current measurement, and application flexibility in choosing sense resistor values. A choice of either an internal op amp or a comparator is provided to the user. The internal amplifier can be used to limit the inrush current or to create a current source in a closed-loop system. The comparator can be used to monitor fault events for fast response. An I2C-controlled 12-bit, 500sps analog-to-digital converter (ADC) can be used to read the voltage across the sense resistor (VSENSE), the input common-mode voltage (VRSCM), op-amp/comparator output (VOUT), op-amp/comparator reference voltage (VSET), and internal die temperature. The I2C bus is compatible with 1.8V and 3.3V logic, allowing modern microcontrollers to interface to it. The MAX9611 features a noninverting input-to-output configuration while the MAX9612 features an inverting input-to-output configuration. The MAX9611/MAX9612 operate with a 2.7V to 5.5V supply voltage range, are fully specified over the -40°C to +125°C automotive temperature range, and are available in a 3mm x 5mm, 10-pin µMAX® package.

Key Features
  • 0V to +60V Input Common-Mode Voltage Range
  • 2.7V to 5.5V Power-Supply Range, Compatible with 1.8V and 3.3V Logic
  • 5µA Software Shutdown Current
  • Integrated 12-Bit ADC
  • 13µV Current-Sense ADC Resolution
  • 500µV (max) Current-Sense ADC Input Offset Voltage
  • 0.5% (max) Current-Sense ADC Gain Error
  • I²C Bus with 16 Addresses
  • Small, 3mm x 5mm 10-Pin µMAX Package
  • -40°C to +125°C Operating Temperature Range
MAX9611, MAX9612: Typical Application Circuit
MAX9611, MAX9612: Typical Application Circuit
Applications/Uses
  • Base-Station Feeder Cable Bias-T
  • Base-Station PA Control
  • Battery-Operated Equipment
  • Hybrid Automotive Power Supplies
  • Server Backplanes
  • Telecom Cards
DataSheet
titleDownload file
MAX9611-MAX9612 Data SheetMAX9611-MAX9612.pdf
Parametrics
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
MAX9611Digital0602.75.51600No440300Adj.0.540001-40 to +125µMAX/10$1.67 @1k
MAX9612µMAX/10
Design kits & evaluation modules
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX9612AUB+ActiveµMAX,;10 pin;15.4 mm²-40°C to +125°CLead Free
MAX9612AUB+TActiveµMAX,;10 pin;15.4 mm²-40°C to +125°CLead Free
MAX9611-MAX9612.pdf MAX9612
MAX9611-MAX9612.pdf MAX9611