Overview
The AD8555ARZ-REEL7, produced by Analog Devices Inc., is a zero-drift, sensor signal amplifier designed for high accuracy and flexibility in signal processing. This amplifier features digitally programmable gain and output offset, making it ideal for converting variable pressure sensor and strain bridge outputs into well-defined output voltage ranges. The AD8555 utilizes ADI's patented low noise auto-zero and DigiTrim® technologies to achieve extremely low input offset voltage and drift, along with high common-mode rejection ratio (CMRR). It operates over an extended industrial temperature range of −40°C to +125°C and is available in both 8-lead SOIC and 16-lead LFCSP packages.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | 2 | 10 | µV | ||
| Input Offset Voltage Drift (TCVOS) | 25 | 60 | nV/°C | ||
| Common-Mode Rejection Ratio (CMRR) | 96 | dB | |||
| Digitally Programmable Gain Range | 70 | 1280 | |||
| Supply Voltage Range | 2.7 | 5.5 | V | ||
| Operating Temperature Range | -40 | 125 | °C | ||
| Package Type | 8-Lead SOIC, 16-Lead LFCSP |
Key Features
- Very low offset voltage: 10 µV maximum over temperature
- Very low input offset voltage drift: 60 nV/°C maximum
- High CMRR: 96 dB minimum
- Digitally programmable gain and output offset voltage
- Single-wire serial interface
- Open and short wire fault detection
- Low-pass filtering via a single external capacitor
- Stable with any capacitive load
- Externally programmable output clamp voltage for driving low voltage ADCs
- Pull-up current source at input pins and pull-down current source at VCLAMP pin
Applications
- Pressure and position sensors
- Thermocouple amplifiers
- Industrial weigh scales
- Precision current sensing
- Strain gages
Q & A
- What is the AD8555ARZ-REEL7 used for?
The AD8555ARZ-REEL7 is used as a zero-drift, sensor signal amplifier with digitally programmable gain and output offset, ideal for converting variable sensor outputs into well-defined voltage ranges.
- What are the key features of the AD8555ARZ-REEL7?
Key features include very low offset voltage, low input offset voltage drift, high CMRR, digitally programmable gain and output offset, single-wire serial interface, and open/short wire fault detection.
- What is the operating temperature range of the AD8555ARZ-REEL7?
The operating temperature range is from -40°C to +125°C.
- What are the available package types for the AD8555ARZ-REEL7?
The AD8555ARZ-REEL7 is available in both 8-lead SOIC and 16-lead LFCSP packages.
- How is the gain of the AD8555ARZ-REEL7 adjusted?
The gain is digitally programmable through a single-wire serial interface, with a range from 70 to 1280.
- What is the supply voltage range for the AD8555ARZ-REEL7?
The supply voltage range is from 2.7 V to 5.5 V.
- Does the AD8555ARZ-REEL7 support low-pass filtering?
- Is the AD8555ARZ-REEL7 RoHS compliant?
- What types of sensors can the AD8555ARZ-REEL7 be used with?
The AD8555ARZ-REEL7 can be used with pressure and position sensors, thermocouples, industrial weigh scales, precision current sensing, and strain gages.
- How does the AD8555ARZ-REEL7 handle fault detection?
The AD8555ARZ-REEL7 includes open and short wire fault detection through pull-up and pull-down current sources.
