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MAX9611
High-Side, Current-Sense Amplifiers with 12-Bit ADC and Op Amp/Comparator
Current-Sense Amplifiers with Digital Output and 60V Common-Mode Range
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Key Features
Applications/Uses
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 |
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Simplified Block Diagram
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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.
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.
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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