Overview
The ADA4254ACPZ from Analog Devices Inc. is a zero drift, high voltage, low power programmable gain instrumentation amplifier (PGIA) designed for process control and industrial applications. This amplifier features a zero drift topology that self-calibrates DC errors and low frequency 1/f noise, ensuring excellent DC precision over the entire specified temperature range. With a power consumption of only 22 mW, it is an excellent choice for systems requiring precision, robustness, and low power consumption.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Gain Range | 0.0625 | - | 128 | V/V |
| Input Offset Voltage | - | - | ±14 μV | μV |
| Input Offset Voltage Drift | - | - | ±0.08 μV/°C | μV/°C |
| Gain Drift | - | - | ±1 ppm/°C | ppm/°C |
| CMRR | 116 dB | - | - | dB |
| Input Bias Current | - | - | ±1.5 nA | nA |
| Input Impedance (Common Mode) | >1 GΩ||pF | - | - | GΩ||pF |
| Input Supply Range | ±5 V | - | ±28 V | V |
| Operating Temperature Range | -40°C | - | +105°C | °C |
| Package Type | 28-Lead LFCSP, 24-Lead TSSOP | - | - | - |
Key Features
- Zero drift amplifier topology for excellent DC precision
- 12 binary weighted gains ranging from 1/16 V/V to 128 V/V and three scaling gain options (1 V/V, 1.25 V/V, 1.375 V/V)
- Low power consumption: 22 mW (±12 V supplies)
- ±60 V protected input multiplexer with high impedance inputs
- Integrated electromagnetic interference (EMI) filters
- Seven general-purpose input/output (GPIO) pins with special functions
- Excitation current source output for biasing sensors like RTDs
- SPI port with cyclical redundancy check (CRC) support for robust communication
- Internal fault detection and wire break test currents
- On-chip test multiplexer
Applications
- Universal process control front ends
- Data acquisition systems
- Test and measurement systems
Q & A
- What is the ADA4254ACPZ primarily designed for?
The ADA4254ACPZ is designed for process control and industrial applications, offering high precision, low power consumption, and robust features.
- What are the gain options available on the ADA4254ACPZ?
The ADA4254ACPZ offers 12 binary weighted gains ranging from 1/16 V/V to 128 V/V, along with three scaling gain options of 1 V/V, 1.25 V/V, and 1.375 V/V.
- What is the power consumption of the ADA4254ACPZ?
The power consumption is 22 mW when operated with ±12 V supplies.
- What kind of input protection does the ADA4254ACPZ offer?
The ADA4254ACPZ features a ±60 V protected input multiplexer with high impedance inputs.
- Does the ADA4254ACPZ have integrated EMI filtering?
Yes, the ADA4254ACPZ includes integrated electromagnetic interference (EMI) filters to block harsh RF noise.
- What communication interface does the ADA4254ACPZ support?
The ADA4254ACPZ supports an SPI port with cyclical redundancy check (CRC) for robust communication.
- What are the operating temperature ranges for the ADA4254ACPZ?
The operating temperature range is from -40°C to +105°C.
- What package types are available for the ADA4254ACPZ?
The ADA4254ACPZ is available in 28-Lead LFCSP and 24-Lead TSSOP packages.
- Does the ADA4254ACPZ have any safety features?
Yes, it includes internal fault detection, wire break test currents, and on-chip test multiplexer for enhanced safety.
- What special functions can the GPIO pins of the ADA4254ACPZ be configured for?
The seven GPIO pins can be configured to provide various special functions, including excitation current sources for biasing sensors like RTDs.
