Overview
The ADA4255ACPZ-RL, produced by Analog Devices Inc., is a precision programmable gain instrumentation amplifier (PGIA) with integrated bipolar charge pumps. This device is designed to provide high precision and robust performance in various industrial and process control applications. The ADA4255 features a zero-drift topology that self-calibrates DC errors and lower frequency 1/f noise, ensuring excellent DC precision over a wide temperature range of −40°C to +105°C. The integrated charge pumps enable the production of high voltage bipolar supplies, allowing for a wide input voltage range without compromising input impedance.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Power Consumption | 83 mW | (DVDD = 3 V, VDDCP = 5 V) | ||
| Precision Gains | 1/16 V/V | 176 V/V | ||
| Input Offset Voltage | ±14 µV | |||
| Input Offset Voltage Drift | ±0.08 µV/°C | |||
| Gain Drift | ±1 ppm/°C | |||
| Common-Mode Rejection Ratio (CMRR) | 111 dB | (G = 1 V/V) | ||
| Input Protection | ±60 V | |||
| Package Type | 28-Lead LFCSP (5mm x 5mm x 0.95mm w/ EP) |
Key Features
- Integrated bipolar charge pump for high voltage bipolar supplies
- Simplified isolation requirements using low voltage components
- Wide input range on low voltage supplies
- Dedicated output amplifier supplies for ADC protection
- Low power consumption: 83 mW (DVDD = 3 V, VDDCP = 5 V)
- 36 precision gains from 1/16 V/V to 176 V/V
- Robust ±60 V protected 2:1 input multiplexer
- Excellent DC precision with low input offset voltage and drift
- High CMRR: 111 dB minimum at G = 1 V/V
- Excitation current source output for sensor biasing
- SPI port with checksum (CRC) support and internal/external fault detection
- Seven general-purpose input and output (GPIOx) pins with special functions
Applications
- Universal process control front ends
- Data acquisition systems
- Test and measurement systems
- System power monitoring
Q & A
- What is the ADA4255ACPZ-RL used for?
The ADA4255ACPZ-RL is a precision programmable gain instrumentation amplifier used in various industrial and process control applications, including universal process control front ends, data acquisition systems, test and measurement systems, and system power monitoring.
- What is the temperature range of the ADA4255ACPZ-RL?
The ADA4255ACPZ-RL is specified over a temperature range of −40°C to +105°C.
- How many precision gains does the ADA4255ACPZ-RL offer?
The ADA4255ACPZ-RL offers 36 precision gains ranging from 1/16 V/V to 176 V/V.
- What is the input protection of the ADA4255ACPZ-RL?
The ADA4255ACPZ-RL has robust ±60 V protected 2:1 input multiplexer.
- Does the ADA4255ACPZ-RL have integrated EMI filtering?
Yes, the ADA4255ACPZ-RL includes integrated electromagnetic interference (EMI) filtering.
- What is the power consumption of the ADA4255ACPZ-RL?
The power consumption of the ADA4255ACPZ-RL is 83 mW when DVDD = 3 V and VDDCP = 5 V.
- Does the ADA4255ACPZ-RL have an excitation current source?
Yes, the ADA4255ACPZ-RL includes an excitation current source output for biasing sensors such as resistance temperature detectors (RTDs).
- What is the package type of the ADA4255ACPZ-RL?
The ADA4255ACPZ-RL is offered in a 28-Lead LFCSP (5mm x 5mm x 0.95mm w/ EP) package.
- Does the ADA4255ACPZ-RL support SPI communication?
Yes, the ADA4255ACPZ-RL has an SPI port with checksum (CRC) support.
- What are the GPIOx pins used for in the ADA4255ACPZ-RL?
The ADA4255ACPZ-RL includes seven general-purpose input and output (GPIOx) pins that can be configured to provide various special functions.
