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ADA4254
RECOMMENDED FOR NEW DESIGNSZero Drift, High Voltage, Low Power, Programmable Gain Instrumentation Amplifier
- Part Models
- 7
- 1ku List Price
- Starting From $3.57
Part Details
- Optimized for ADC synchronization
- Low power: 22 mW (±12 V supplies)
- 12 binary gain steps from 1/16 V/V to 128 V/V
- 3 scaling gains: 1 V/V, 1.25 V/V, and 1.375 V/V
- ±60 V protected input multiplexer
- Excellent dc precision
- Low input offset voltage: ±14 μV maximum
- Low input offset voltage drift: ±0.08 μV/°C maximum
- Gain calibration via ROM
- Low gain drift: ±1 ppm/°C maximum
- High CMRR: 116 dB minimum, G = 1 V/V
- Low input bias current: ±1.5 nA maximum
- High input impedance
- Integrated input EMI filtering
- Wide input supply range: ±5 V to ±28 V
- Dedicated output amplifier supplies
- 7 GPIO ports with special functions
- Sequential chip select mode
- External multiplexer control
- Excitation current sources
- SPI port with checksum (CRC) support
- Internal fault detection
- Wire break test currents
- On-chip test multiplexer
- 28-lead, 5 mm × 5 mm LFCSP, 24-lead TSSOP
- Specified temperature range: −40°C to +105°C
The ADA4254 is a zero drift, high voltage, low power programmable gain instrumentation amplifier (PGIA) designed for process control and industrial applications. The ADA4254 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. The power consumption of the ADA4254 is a mere 22 mW, making the device an excellent choice for industrial systems that demand precision, robustness, and low power.
The zero drift amplifier topology of the ADA4254 self calibrates dc errors and low frequency 1/f noise, achieving excellent dc precision over the entire specified temperature range. This high level of precision maximizes dynamic range and greatly reduces calibration requirements in many applications.
The input multiplexer provides ±60 V protection to the high impedance inputs of the amplifier, while providing the capability to switch between two input sources. In addition, integrated electromagnetic interference (EMI) filters block harsh RF noise from the sensitive inputs of the amplifier.
Various safety features on the ADA4254 detect both internal and external faults. The serial port interface (SPI) supports cyclical redundancy check (CRC) error detection to ensure robust communication. These safety features ease system safety integrity level (SIL) certification.
Seven general-purpose input/output (GPIO) pins, which can be configured to provide various special functions, are included in the ADA4254. An excitation current source output is available to bias sensors such as resistance temperature detectors (RTDs).
The ADA4254 is specified over the −40°C to +105°C temperature range and is offered in a compact 5 mm × 5 mm, 28-lead LFCSP and a 24-lead TSSOP.
Applications
- Universal process control front ends
- Data acquisition systems
- Test and measurement systems
Documentation
Data Sheet 1
User Guide 2
Video 1
3rd Party Solutions 1
Webcast 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| ADA4254ACPZ | 28-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP) | ||
| ADA4254ACPZ-R7 | 28-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP) | ||
| ADA4254ACPZ-RL | 28-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP) | ||
| ADA4254ACPZ-WP | 28-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP) | ||
| ADA4254ARUZ | 24-Lead TSSOP | ||
| ADA4254ARUZ-R7 | 24-Lead TSSOP | ||
| ADA4254ARUZ-RL | 24-Lead TSSOP |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- ADA4254
In-Amp Diamond Plot Tool
The Diamond Plot Tool is a web application that generates a configuration-specific Output Voltage Range vs. Input Common-Mode Voltage graph, also known as the Diamond Plot, for Analog Devices Instrumentation Amplifiers. Based on user inputs such as supply voltage, gain, and input signal range, the tool detects saturation and recommends in-amps for which the input signal is in-range and the configuration is valid. Avoid saturation, find the best in-amp for your design, and save time.
Open ToolSPICE Model 1
IBIS Model 1
Signal Chain Designer - BETA
Signal Chain Designer is a web-based tool designed to create and simulate complex precision signal chains. See your circuit’s performance before you commit to your PCB: transfer function, noise, power consumption, input range, and DC error. Quickly experiment with different parts and architectures. Signal chains can be exported to LTspice for further analysis.
Open ToolLTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
ADA4254 Evaluation Board