Overview
The ADA4254ACPZ-RL, produced by 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 robust design with excellent dc precision, low power consumption, and a wide range of gain settings. It is optimized for use in universal process control front ends, data acquisition systems, and test and measurement systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Offset Voltage | - | - | ±14 | μV |
| Input Offset Voltage Drift | - | - | ±0.08 | μV/°C |
| Gain Drift | - | - | ±1 | ppm/°C |
| Common Mode Rejection Ratio (CMRR) | 116 | - | - | dB (G = 1 V/V) |
| Input Bias Current | - | - | ±1.5 | nA |
| Input Impedance (Common Mode) | >1 | - | - | GΩ||pF |
| Input Impedance (Differential) | >1 | - | - | GΩ||pF |
| Input Supply Range | ±5 | - | ±28 | V |
| Power Consumption | - | - | 22 | mW (±12 V supplies) |
| Temperature Range | -40 | - | 105 | °C |
| Package | - | - | 28-Lead LFCSP, 24-Lead TSSOP | - |
Key Features
- 12 binary weighted gains ranging from 1/16 V/V to 128 V/V and three scaling gain options of 1 V/V, 1.25 V/V, and 1.375 V/V, resulting in 36 possible gain settings.
- Low input offset voltage and drift, and low gain drift for excellent dc precision.
- High CMRR of 116 dB minimum at G = 1 V/V.
- Low input bias current and high input impedance.
- Integrated input EMI filtering and ±60 V protected input multiplexer.
- Dedicated output amplifier supplies and 7 GPIO ports with special functions.
- Sequential chip select mode, external multiplexer control, and excitation current sources.
- SPI port with checksum (CRC) support, internal fault detection, and wire break test currents.
- On-chip test multiplexer and various safety features for system SIL certification.
Applications
- Universal process control front ends.
- Data acquisition systems.
- Test and measurement systems.
Q & A
- What is the ADA4254ACPZ-RL used for? The ADA4254ACPZ-RL is used in process control, data acquisition, and test and measurement systems due to its high precision and robust design.
- What are the gain settings available on the ADA4254ACPZ-RL? The ADA4254ACPZ-RL offers 12 binary weighted gains from 1/16 V/V to 128 V/V and three scaling gain options of 1 V/V, 1.25 V/V, and 1.375 V/V.
- What is the input offset voltage of the ADA4254ACPZ-RL? The input offset voltage is ±14 μV maximum.
- How does the ADA4254ACPZ-RL protect against EMI? The ADA4254ACPZ-RL includes integrated electromagnetic interference (EMI) filters to block harsh RF noise from the sensitive inputs of the amplifier.
- What is the temperature range of the ADA4254ACPZ-RL? The specified temperature range is from -40°C to +105°C.
- What types of packages are available for the ADA4254ACPZ-RL? The ADA4254ACPZ-RL is available in a 28-lead LFCSP and a 24-lead TSSOP package.
- Does the ADA4254ACPZ-RL support SPI communication? Yes, the ADA4254ACPZ-RL features an SPI port with checksum (CRC) support for robust communication.
- What safety features does the ADA4254ACPZ-RL include? The ADA4254ACPZ-RL includes internal fault detection, wire break test currents, and various safety features to ease system SIL certification.
- How much power does the ADA4254ACPZ-RL consume? The power consumption is 22 mW with ±12 V supplies.
- What is the purpose of the GPIO ports on the ADA4254ACPZ-RL? The 7 GPIO ports can be configured to provide various special functions, including excitation current sources for sensors like RTDs.
