Overview
The AD8538AUJZ-REEL7 is a high-precision, low-power operational amplifier (op-amp) produced by Analog Devices Inc. This device is part of the AD8538/AD8539 series, known for its extremely low offset voltage, low input bias current, and low power consumption. The AD8538 is suitable for applications requiring high precision and low noise, making it ideal for various industrial, automotive, and portable instrumentation uses.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | −40°C ≤ TA ≤ +125°C | 5 | 13 | 30 | µV |
| Input Bias Current | IB | −40°C ≤ TA ≤ +85°C | 15 | 25 | 35 | pA |
| Input Offset Current | IOS | −40°C ≤ TA ≤ +125°C | 20 | 50 | 150 | pA |
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 2.5 V | 100 | 140 | 135 | dB |
| Power Supply Rejection Ratio | PSRR | VS = 2.7 V to 5.5 V | 100 | 125 | 125 | dB |
| Supply Current/Amplifier | ISY | IO = 0, −40°C ≤ TA ≤ +125°C | 150 | 180 | 215 | µA |
| Slew Rate | SR | RL = 10 kΩ | 0.35 | - | - | V/µs |
| Settling Time (0.01%) | tS | G = ±1, 1 V step, CL = 20 pF, RL = 1 kΩ | 5 | - | - | μs |
| Gain Bandwidth Product | GBP | - | 430 | - | - | kHz |
| Voltage Noise Density | en | f = 1 kHz | - | 50 | - | nV/√Hz |
Key Features
- Low Offset Voltage: Maximum of 13 µV, ensuring high precision in applications.
- Low Input Bias Current: As low as 25 pA, reducing errors in high-impedance circuits.
- Low Power Consumption: Supply current of 180 µA per amplifier, suitable for battery-powered devices.
- High Gain, CMRR, and PSRR: High common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR) for robust performance in noisy environments.
- Single-Supply Operation: Operates from 2.7 V to 5.5 V, making it versatile for various power supply configurations.
- Low Noise Performance: Voltage noise density of 50 nV/√Hz at 1 kHz, ideal for low-noise applications.
Applications
- Mobile Communications: Suitable for signal processing in mobile communication devices due to its low noise and high precision.
- Portable Instrumentation: Ideal for battery-powered instrumentation where low power consumption is critical.
- Automotive Applications: Qualified for use in automotive systems, ensuring reliability over a wide temperature range.
- Medical Devices: Used in medical equipment where high precision and low noise are essential.
Q & A
- What is the typical offset voltage of the AD8538?
The typical offset voltage of the AD8538 is 13 µV.
- What is the input bias current of the AD8538?
The input bias current is typically 25 pA.
- What is the supply current per amplifier for the AD8538?
The supply current per amplifier is typically 180 µA.
- What is the common-mode rejection ratio (CMRR) of the AD8538?
The CMRR is typically 140 dB.
- What is the power supply rejection ratio (PSRR) of the AD8538?
The PSRR is typically 125 dB.
- What is the slew rate of the AD8538?
The slew rate is 0.35 V/µs.
- What is the gain bandwidth product (GBP) of the AD8538?
The GBP is 430 kHz.
- What is the voltage noise density of the AD8538 at 1 kHz?
The voltage noise density is 50 nV/√Hz at 1 kHz.
- Is the AD8538 qualified for automotive applications?
Yes, the AD8538 is qualified for automotive applications.
- What is the operating voltage range for the AD8538?
The AD8538 operates from a single supply of 2.7 V to 5.5 V or dual supply of ±1.35 V to ±2.5 V.
