Overview
The AD8684ARZ is a quad low-power, high-speed JFET operational amplifier produced by Analog Devices Inc. This device is designed for applications requiring low power consumption and high precision, making it ideal for portable and battery-powered instruments. The AD8684ARZ features a JFET input stage, which ensures very low input bias current and high input impedance, making it suitable for applications with high source impedance.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Supply Voltage | ±4.5 V to ±18 V | |
| Input Voltage Range | −11 V to +15 V | |
| Input Bias Current | 6 pA to 20 pA | −40°C to +85°C |
| Offset Voltage | 0.35 mV to 4 mV | −40°C to +85°C |
| Common-Mode Rejection Ratio (CMRR) | 70 dB to 90 dB | −40°C to +85°C |
| Slew Rate | 9 V/μs | |
| Bandwidth | 3.5 MHz typical | |
| Output Current per Channel | 12 mA | |
| Operating Temperature Range | −40°C to +85°C | |
| Package Type | 14-SOIC |
Key Features
- Low supply current: 250 μA maximum per amplifier
- High slew rate: 9 V/μs
- High bandwidth: 3.5 MHz typical
- Low offset voltage: 0.35 mV to 4 mV
- Very low input bias current: 6 pA to 20 pA
- High common-mode rejection ratio (CMRR): 70 dB to 90 dB
- Unity-gain stable and capable of driving higher capacity loads
- Low noise: 36 nV/√Hz voltage noise density at 1 kHz
Applications
- Portable and battery-powered instruments
- High source impedance applications
- Precision current sensing
- Medical instrumentation
- Industrial controls
- Precision filters
- Audio equipment
Q & A
- What is the typical bandwidth of the AD8684ARZ?
The typical bandwidth of the AD8684ARZ is 3.5 MHz. - What is the maximum input bias current of the AD8684ARZ?
The maximum input bias current is 20 pA at 25°C and 125 pA over the full temperature operating range. - What is the slew rate of the AD8684ARZ?
The slew rate is 9 V/μs. - What is the common-mode rejection ratio (CMRR) of the AD8684ARZ?
The CMRR is typically 90 dB. - What is the operating temperature range of the AD8684ARZ?
The operating temperature range is −40°C to +85°C. - What is the package type of the AD8684ARZ?
The package type is 14-SOIC. - Is the AD8684ARZ RoHS compliant?
Yes, the AD8684ARZ is RoHS compliant. - What is the maximum output current per channel of the AD8684ARZ?
The maximum output current per channel is 12 mA. - What are some typical applications of the AD8684ARZ?
Typical applications include portable and battery-powered instruments, precision current sensing, medical instrumentation, and industrial controls. - What is the supply voltage range for the AD8684ARZ?
The supply voltage range is ±4.5 V to ±18 V.
