Overview
The AD8646WARMZ-R7, produced by Analog Devices Inc., is a dual, rail-to-rail, input and output operational amplifier designed for single-supply operation. This amplifier is part of the AD8646/AD8647/AD8648 family, known for its low offset voltage, low noise, and wide bandwidth. It is particularly suited for applications requiring high precision and reliability in various fields such as portable instrumentation, audio amplification, and automotive systems.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | VCM = 0 V to 5 V | 0.6 | 2.5 | 3.2 | mV |
| Offset Voltage Drift | ΔVOS/ΔT | −40°C < TA < +125°C | 1.8 | 7.5 | - | μV/°C |
| Input Bias Current | IB | - | 0.3 | 1 | 550 | pA |
| Input Offset Current | IOS | - | 0.1 | 0.5 | 250 | pA |
| Input Voltage Range | VCM | - | 0 | - | 5 | V |
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 5 V | 67 | 84 | - | dB |
| Output Voltage High | VOH | IOUT = 1 mA | 4.98 | 4.99 | 4.90 | V |
| Output Voltage Low | VOL | IOUT = 1 mA | 8.4 | 20 | 40 | mV |
| Output Current | Isc | Short circuit | - | - | ±120 | mA |
| Supply Current per Amplifier | ISY | - | 1.5 | 2.0 | 2.5 | mA |
| Supply Current Shutdown Mode (AD8647 Only) | ISD | Both amplifiers shut down, VIN_SDA and VIN_SDB = 0 V | - | - | 10 nA | nA |
| Slew Rate | SR | RL = 2 kΩ | - | 11 | - | V/μs |
| Gain Bandwidth Product | GBP | - | - | 24 | - | MHz |
Key Features
- Low offset voltage: 2.5 mV maximum
- Single-supply operation: 2.7 V to 5.5 V
- Low noise: 8 nV/√Hz
- Wide bandwidth: 24 MHz
- High slew rate: 11 V/μs
- Short-circuit output current: ±120 mA
- Qualified for automotive applications
- No phase reversal
- Shutdown option available (AD8647 only)
Applications
The AD8646WARMZ-R7 is suitable for a variety of applications, including:
- Portable and low-powered instrumentation
- Audio amplification for portable devices and phone headsets
- Barcode scanners
- Automotive systems
- Medical instrumentation
- Position and pressure sensors, and strain gages
Q & A
- What is the typical offset voltage of the AD8646WARMZ-R7?
The typical offset voltage is 2.5 mV. - What is the operating supply voltage range for this amplifier?
The operating supply voltage range is 2.7 V to 5.5 V. - What is the gain bandwidth product of the AD8646WARMZ-R7?
The gain bandwidth product is 24 MHz. - Does the AD8646WARMZ-R7 have a shutdown feature?
No, the shutdown feature is available only in the AD8647 model. - What is the maximum short-circuit output current of the AD8646WARMZ-R7?
The maximum short-circuit output current is ±120 mA. - Is the AD8646WARMZ-R7 qualified for automotive applications?
Yes, it is qualified for automotive applications. - What is the common-mode rejection ratio (CMRR) of the AD8646WARMZ-R7?
The CMRR is 67 dB to 84 dB. - What is the slew rate of the AD8646WARMZ-R7?
The slew rate is 11 V/μs. - What is the typical supply current per amplifier for the AD8646WARMZ-R7?
The typical supply current per amplifier is 2.0 mA. - What are some common applications of the AD8646WARMZ-R7?
Common applications include portable instrumentation, audio amplification, barcode scanners, and automotive systems.
