The ADA4254 from Analog Devices 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.
Key Features and Benefits
- Low Power: eases thermal constraints, lowers power supply requirements
- Input Range and input overvoltage protection: handles wider range of input signals while improving robustness
- Space savings: reduction of board area, especially in costly enclosures
Applications
- Industrial Automation: process control, analog Input/output module, functional safety
- Instrumentation: data acquisition, weigh scales
- General Purpose: voltage sensing, current sensing, sensor interface
Block Diagrams and Tables
Related Evaluation Board
Product Technical Specifications
EU RoHS
Compliant
ECCN (US)
EAR99
Part Status
Active
HTS
8542.33.00.01
Automotive
No
PPAP
No
Number of Channels per Chip
1
Maximum Voltage Gain (dB)
154(Typ)
Maximum Voltage Gain Range (dB)
>=125
Minimum CMRR (dB)
92
Minimum CMRR Range (dB)
85 to 95
Minimum PSRR (dB)
80
Maximum Input Offset Voltage (mV)
0.014@±28V
Maximum Operating Supply Voltage (V)
±28|56
Maximum Supply Voltage Range (V)
>=50
Minimum Single Supply Voltage (V)
10
Typical Single Supply Voltage (V)
28|24|12|15|18
Maximum Single Supply Voltage (V)
56
Minimum Dual Supply Voltage (V)
±5
Typical Dual Supply Voltage (V)
±24|±9|±12|±15|±18
Maximum Dual Supply Voltage (V)
±28
Maximum Input Bias Current (uA)
0.0015@±28V
Maximum Supply Current (mA)
0.765@28V/-0.985@-28V
Typical Output Current (mA)
1.5(Max)@±28V
Maximum Input Resistance (MOhm)
10000(Typ)@±28V
Power Supply Type
Single|Dual
Maximum Power Dissipation (mW)
56
Minimum Operating Temperature (°C)
-40
Maximum Operating Temperature (°C)
105
Packaging
Tape and Reel
Mounting
Surface Mount
Package Height
0.73
Package Width
5
Package Length
5
PCB changed
28
Standard Package Name
CSP
Supplier Package
LFCSP EP
Pin Count
28