Overview
The ADA4522-1ARZ from Analog Devices Inc. is a single-channel, zero-drift operational amplifier (op-amp) designed for high accuracy and low noise. This device features ground sensing inputs and rail-to-rail output, making it suitable for a wide range of applications that require precise signal amplification. The ADA4522-1ARZ operates over a broad voltage range of 4.5V to 55V, including single-ended supplies of 5V, 10V, 12V, and 30V, as well as dual supplies of ±2.5V, ±5V, and ±15V. Its high open-loop gain and very low DC and AC errors ensure total accuracy over time, temperature, and voltage conditions.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Input Offset Voltage (Vos) | 5µV max | VSY = 5V, VCM = VSY/2 V, TA = 25°C |
| Input Offset Voltage Drift | 15nV/°C max | VSY = 5V, VCM = VSY/2 V, TA = 25°C |
| Input Bias Current | 150pA max | VSY = 5V, VCM = VSY/2 V, TA = 25°C |
| Input Offset Current | 250pA max | VSY = 5V, VCM = VSY/2 V, TA = 25°C |
| Bandwidth (-3dB) | 6.5MHz typical | VIN = 10mV p-p, RL = 10Kohm, CL = 50pF, AV = 1, VSY = 5V, TA = 25°C |
| Slew Rate | 1.4V/µs typical | RL = 10Kohm, CL = 50pF, AV = 1, VS = 5V, VCM = 2.5V, TA = 25°C |
| Common Mode Rejection Ratio (CMRR) | 155dB typical | VCM = 0 to 3.5V, VSY = 5V, TA = 25°C |
| Supply Voltage Range | 4.5V to 55V, ±2.25V to ±27.5V | |
| Operating Temperature Range | -40°C to +125°C | |
| Package | 8-lead MSOP, 8-lead SOIC, 14-lead SOIC, 14-lead TSSOP |
Key Features
- Zero-drift architecture for high accuracy over time, temperature, and voltage conditions.
- Low noise and power consumption.
- Ground sensing inputs and rail-to-rail output.
- On-chip filtering for high immunity to electromagnetic interference (EMI).
- Unity-gain stable and integrated EMI filters.
- Thermal shutdown circuitry to prevent overheating.
- Wide operating voltage range: 4.5V to 55V, including single-ended and dual supplies.
- High open-loop gain and very low DC and AC errors.
Applications
- Inductance, capacitance, and resistance (LCR) meter/megohmmeter front-end amplifiers.
- Load cell and bridge transducers.
- Magnetic force balance scales.
- High precision shunt current sensing.
- Thermocouple/RTD sensors.
- Programmable logic controller input and output amplifiers.
Q & A
- What is the input offset voltage of the ADA4522-1ARZ?
The input offset voltage is 5µV maximum at VSY = 5V, VCM = VSY/2 V, and TA = 25°C.
- What is the operating temperature range of the ADA4522-1ARZ?
The operating temperature range is -40°C to +125°C.
- What is the typical bandwidth of the ADA4522-1ARZ?
The typical bandwidth is 6.5MHz at VIN = 10mV p-p, RL = 10Kohm, CL = 50pF, AV = 1, VSY = 5V, and TA = 25°C.
- Does the ADA4522-1ARZ have thermal shutdown protection?
Yes, the ADA4522-1ARZ has thermal shutdown circuitry that activates when the junction temperature reaches 190°C and disables the amplifier.
- What are the package options for the ADA4522-1ARZ?
The package options include 8-lead MSOP, 8-lead SOIC, 14-lead SOIC, and 14-lead TSSOP.
- What is the common mode rejection ratio (CMRR) of the ADA4522-1ARZ?
The CMRR is 155dB typical at VCM = 0 to 3.5V, VSY = 5V, and TA = 25°C.
- Is the ADA4522-1ARZ immune to electromagnetic interference (EMI)?
Yes, the ADA4522-1ARZ has on-chip filtering to achieve high immunity to EMI.
- What is the slew rate of the ADA4522-1ARZ?
The slew rate is 1.4V/µs typical at RL = 10Kohm, CL = 50pF, AV = 1, VS = 5V, VCM = 2.5V, and TA = 25°C.
- What are some typical applications of the ADA4522-1ARZ?
Typical applications include LCR meter/megohmmeter front-end amplifiers, load cell and bridge transducers, magnetic force balance scales, high precision shunt current sensing, thermocouple/RTD sensors, and programmable logic controller input and output amplifiers.
- What is the supply voltage range of the ADA4522-1ARZ?
The supply voltage range is 4.5V to 55V, including single-ended and dual supplies.
