Overview
The ADA4895-1ARZ from Analog Devices Inc. is a high-speed voltage feedback operational amplifier designed for applications requiring low noise, high gain, and precision. This single-channel amplifier is gain ≥ 10 stable, featuring low input noise of 1 nV/√Hz and a 1/f noise of 2 nV/√Hz at 10 Hz. It operates with a quiescent current of 3 mA and has a wide supply voltage range of 3 V to 10 V, making it suitable for systems needing large dynamic range and high speed. The ADA4895-1ARZ is built using Analog Devices' proprietary next-generation SiGe bipolar process, ensuring high performance across various applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Bandwidth (G = +10) | 236 | MHz | ||
| Slew Rate | 943 | V/µs | ||
| Settling Time to 0.1% | 22 | ns | ||
| Input Noise | 1 | nV/√Hz | ||
| 1/f Noise at 10 Hz | 2 | nV/√Hz | ||
| Input Offset Voltage | -350 | 350 | µV | |
| Input Bias Current | -16 | -6 | µA | |
| Supply Voltage Range | 3 | 10 | V | |
| Quiescent Current per Amplifier | 2.8 | 3 | 3.2 | mA |
| Operating Temperature Range | -40 | 125 | °C | |
| Package Type | 8-lead SOIC |
Key Features
- Low Noise: 1 nV/√Hz wideband noise and 2 nV/√Hz 1/f noise at 10 Hz.
- High Speed: 236 MHz bandwidth at G = +10 and 943 V/µs slew rate.
- Rail-to-Rail Output: Ensures maximum output swing.
- Low Distortion: SFDR of −96 dBc at 100 kHz, VOUT = 2 V p-p.
- Low Power Consumption: Quiescent current of 3 mA per amplifier.
- Wide Supply Range: Operates from 3 V to 10 V.
- Disable Feature: Allows the amplifier to be disabled for power-saving or other control purposes.
- High Temperature Range: Operates over −40°C to +125°C.
Applications
- Low Noise Preamplifiers: Ideal for applications requiring minimal noise generation.
- Ultrasound Amplifiers: Suitable for medical imaging and diagnostic equipment.
- PLL Loop Filters: Used in phase-locked loop circuits for frequency stabilization.
- High Performance ADC and DAC Drivers: Drives high-performance analog-to-digital and digital-to-analog converters.
Q & A
- What is the bandwidth of the ADA4895-1ARZ at a gain of +10?
The bandwidth of the ADA4895-1ARZ at a gain of +10 is 236 MHz.
- What is the slew rate of the ADA4895-1ARZ?
The slew rate of the ADA4895-1ARZ is 943 V/µs.
- What is the input noise of the ADA4895-1ARZ?
The input noise of the ADA4895-1ARZ is 1 nV/√Hz.
- What is the 1/f noise of the ADA4895-1ARZ at 10 Hz?
The 1/f noise of the ADA4895-1ARZ at 10 Hz is 2 nV/√Hz.
- What is the supply voltage range of the ADA4895-1ARZ?
The supply voltage range of the ADA4895-1ARZ is from 3 V to 10 V.
- What is the quiescent current of the ADA4895-1ARZ per amplifier?
The quiescent current of the ADA4895-1ARZ per amplifier is 3 mA.
- What is the operating temperature range of the ADA4895-1ARZ?
The operating temperature range of the ADA4895-1ARZ is from −40°C to +125°C.
- What package types are available for the ADA4895-1ARZ?
The ADA4895-1ARZ is available in an 8-lead SOIC package.
- Does the ADA4895-1ARZ have a disable feature?
Yes, the ADA4895-1ARZ has a disable feature that allows the amplifier to be disabled for power-saving or other control purposes.
- What are some typical applications of the ADA4895-1ARZ?
Typical applications include low noise preamplifiers, ultrasound amplifiers, PLL loop filters, and drivers for high-performance ADCs and DACs.
