Overview
The ADA4528-1ACPZ-R7, produced by Analog Devices Inc., is an ultralow noise, zero-drift operational amplifier. This device features rail-to-rail input and output swing, making it highly versatile for various precision applications. With an offset voltage of 2.5 μV and an offset voltage drift of 0.015 μV/°C, it is particularly suited for applications where minimal error is crucial. The ADA4528-1 operates over a wide supply range of 2.2 V to 5.5 V for single-supply operation and ±1.1 V to ±2.75 V for dual-supply operation, ensuring high gain and excellent common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR) specifications.
Key Specifications
| Parameter | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | Vos | 2.5 | μV | |||
| Offset Voltage Drift | TCVos | 0.015 | μV/°C | |||
| Open-Loop Gain | AOL | 130 | dB | |||
| Common-Mode Rejection Ratio (CMRR) | CMRR | 135 | dB | |||
| Power Supply Rejection Ratio (PSRR) | PSRR | 130 | dB | |||
| Unity-Gain Crossover Frequency | fUGB | 4 | MHz | |||
| Gain Bandwidth Product (GBP) | GBP | AV = +100 | 3 | MHz | ||
| -3 dB Closed-Loop Bandwidth | f-3dB | VIN = 10 mV p-p, RL = 10 kΩ, CL = 100 pF, AV = +1 | 6.2 | MHz | ||
| Voltage Noise Density | en | f = 1 kHz, AV = +100 | 5.6 | nV/√Hz | ||
| Input Resistance (Differential Mode) | RINDM | 225 | kΩ | |||
| Input Capacitance (Differential Mode) | CINDM | 15 | pF | |||
| Output Voltage High | VOH | RL = 10 kΩ to VCM | 2.49 | 2.495 | 2.485 | V |
| Output Voltage Low | VOL | RL = 10 kΩ to VCM | 5 | 10 | 15 | mV |
Key Features
- Ultralow Noise and Zero-Drift: The ADA4528-1 features an offset voltage of 2.5 μV and an offset voltage drift of 0.015 μV/°C, along with a low voltage noise density of 5.6 nV/√Hz at 1 kHz.
- Rail-to-Rail Input and Output Swing: This allows the amplifier to operate effectively across the entire supply voltage range.
- High Gain and Excellent CMRR and PSRR: With a minimum open-loop gain of 130 dB, CMRR of 135 dB, and PSRR of 130 dB, it is ideal for precision amplification of low-level signals.
- Wide Operating Supply Range: The device can operate from 2.2 V to 5.5 V in single-supply mode and ±1.1 V to ±2.75 V in dual-supply mode.
- Unity-Gain Stable: The ADA4528-1 is stable at unity gain, making it versatile for various applications.
- Extended Industrial Temperature Range: Specified to operate from −40°C to +125°C.
Applications
- Thermocouple and Thermopile Amplification: Ideal for precision temperature measurement.
- Load Cell and Bridge Transducers: Suitable for high-precision measurement in industrial and medical applications.
- Precision Instrumentation: Used in high-accuracy instrumentation where low noise and drift are critical.
- Electronic Scales: Ensures precise weight measurements.
- Medical Instrumentation: Suitable for medical devices requiring high precision and low noise.
- Handheld Test Equipment: Ideal for portable test equipment that requires high accuracy and low power consumption.
Q & A
- What is the offset voltage of the ADA4528-1?
The offset voltage of the ADA4528-1 is 2.5 μV.
- What is the typical voltage noise density of the ADA4528-1?
The typical voltage noise density is 5.6 nV/√Hz at 1 kHz.
- What is the operating supply voltage range for the ADA4528-1?
The ADA4528-1 operates from 2.2 V to 5.5 V in single-supply mode and ±1.1 V to ±2.75 V in dual-supply mode.
- Is the ADA4528-1 unity-gain stable?
Yes, the ADA4528-1 is unity-gain stable.
- What are the typical applications of the ADA4528-1?
Typical applications include thermocouple and thermopile amplification, load cell and bridge transducers, precision instrumentation, electronic scales, medical instrumentation, and handheld test equipment.
- What is the temperature range for the ADA4528-1?
The ADA4528-1 is specified to operate from −40°C to +125°C.
- What are the package options for the ADA4528-1?
The ADA4528-1 is available in 8-lead MSOP and 8-lead LFCSP packages.
- What is the gain bandwidth product (GBP) of the ADA4528-1?
The gain bandwidth product (GBP) is 3 MHz at AV = +100.
- What is the -3 dB closed-loop bandwidth of the ADA4528-1?
The -3 dB closed-loop bandwidth is 6.2 MHz for VIN = 10 mV p-p, RL = 10 kΩ, CL = 100 pF, and AV = +1.
- What is the input resistance of the ADA4528-1 in differential mode?
The input resistance in differential mode is 225 kΩ.
