Overview
The AD8557ARZ-REEL7, produced by Analog Devices Inc., is a zero drift, sensor signal amplifier designed to accurately convert variable sensor outputs into a well-defined output voltage range. This amplifier features digitally programmable gain and output offset, making it highly versatile for various sensor applications. It utilizes Analog Devices' proprietary low noise auto-zero and DigiTrim technologies to ensure high accuracy and flexibility in signal processing. The AD8557 is suitable for operating in a wide range of environments, with a temperature range from -40°C to +125°C and a single-supply voltage operation from 2.7 V to 5.5 V.
Key Specifications
| Parameter | Value |
|---|---|
| Input Offset Voltage | 12 μV maximum over temperature |
| Input Offset Voltage Drift | 65 nV/°C maximum |
| Common Mode Rejection Ratio (CMRR) | 96 dB minimum |
| Gain Range | 28 to 1300 |
| Output Offset Voltage Adjustment | Digitally programmable, ratiometric to supply voltage |
| Supply Voltage | 2.7 V to 5.5 V |
| Operating Temperature Range | -40°C to +125°C |
| Package Type | 8-lead SOIC |
| Interface | Single-wire serial interface |
Key Features
- Digitally programmable gain and output offset voltage
- Very low input offset voltage and drift
- High common mode rejection ratio (CMRR)
- Stable with any capacitive load
- Single-wire serial interface for configuration
- Output clamping via external reference voltage
- Pull-up current source at input pins and pull-down current source at VCLAMP pin
- Qualified for automotive applications
Applications
- Automotive sensors
- Pressure and position sensors
- Precision current sensing
- Thermocouple amplifiers
- Industrial weigh scales
- Strain gauges
Q & A
- What is the input offset voltage of the AD8557ARZ-REEL7?
The input offset voltage is 12 μV maximum over temperature.
- What is the common mode rejection ratio (CMRR) of the AD8557ARZ-REEL7?
The CMRR is 96 dB minimum.
- What is the gain range of the AD8557ARZ-REEL7?
The gain range is from 28 to 1300.
- How is the output offset voltage adjusted in the AD8557ARZ-REEL7?
The output offset voltage is digitally programmable and ratiometric to the supply voltage.
- What is the operating temperature range of the AD8557ARZ-REEL7?
The operating temperature range is from -40°C to +125°C.
- What type of package is the AD8557ARZ-REEL7 available in?
The AD8557ARZ-REEL7 is available in an 8-lead SOIC package.
- What interface does the AD8557ARZ-REEL7 use for configuration?
The AD8557ARZ-REEL7 uses a single-wire serial interface for configuration.
- Is the AD8557ARZ-REEL7 stable with capacitive loads?
Yes, the AD8557ARZ-REEL7 is stable with any capacitive load.
- What are some typical applications of the AD8557ARZ-REEL7?
Typical applications include automotive sensors, pressure and position sensors, precision current sensing, thermocouple amplifiers, industrial weigh scales, and strain gauges.
- Is the AD8557ARZ-REEL7 qualified for automotive applications?
Yes, the AD8557ARZ-REEL7 is qualified for automotive applications.
