Top

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

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

Product Details

Key Features

Parametric specs for Current Sense Amplifiers
VSENSE_FS (mV) (recomm.) 440
VOS @25°C (µV) (max) 300
Output Format Digital
CMVR (V) (min) 0
CMVR (V) (max) 60
VCC (V) (min) 2.7
VCC (V) (max) 5.5
ICC (µA) (typ) 1600
Bi-Dir. Curr. Sense No
Gain Adj.
Gain Accuracy @25°C (%) (max) 0.5
Oper. Temp. (°C) -40 to +125
Package/Pins UMAX/10
Budgetary
Price (See Notes)
1.86
View Less

Simplified Block Diagram

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Parameters

Parametric specs for Current Sense Amplifiers
VSENSE_FS (mV) (recomm.) 440
VOS @25°C (µV) (max) 300
Output Format Digital
CMVR (V) (min) 0
CMVR (V) (max) 60
VCC (V) (min) 2.7
VCC (V) (max) 5.5
ICC (µA) (typ) 1600
Bi-Dir. Curr. Sense No
Gain Adj.
Gain Accuracy @25°C (%) (max) 0.5
Oper. Temp. (°C) -40 to +125
Package/Pins UMAX/10
Budgetary
Price (See Notes)
1.86

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

Applications/Uses

  • Base-Station Feeder Cable Bias-T
  • Base-Station PA Control
  • Battery-Operated Equipment
  • Hybrid Automotive Power Supplies
  • Server Backplanes
  • Telecom Cards

Description

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.

Simplified Block Diagram

MAX9611, MAX9612: Typical Application Circuit MAX9611, MAX9612: Typical Application Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .