Overview
The AD8624ACPZ-R7 is a quad precision rail-to-rail output operational amplifier produced by Analog Devices Inc. This component is part of the AD8622/AD8624 series, known for its low power consumption and high precision. The AD8624 is particularly suited for applications requiring low noise, high dc precision, and rail-to-rail output swing, making it ideal for various precision instrumentation and control systems.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | -40°C ≤ TA ≤ +125°C | 10 | 125 | 230 | μV |
| Input Bias Current | IB | -40°C ≤ TA ≤ +125°C | - | - | 1.5 nA | |
| Supply Current per Amplifier | ISY | -40°C ≤ TA ≤ +125°C | 175 | 225 | 310 | μA |
| Output Voltage High | VOH | RL = 10 kΩ to ground, -40°C ≤ TA ≤ +125°C | 2.40 | 2.45 | 2.49 | V |
| Output Voltage Low | VOL | RL = 10 kΩ to ground, -40°C ≤ TA ≤ +125°C | -2.45 | -2.40 | -2.36 | V |
| Slew Rate | SR | RL = 10 kΩ, CL = 100 pF, AV = 1 | - | 0.28 | - | V/μs |
| Gain Bandwidth Product | GBP | RL = 10 kΩ, CL = 20 pF, AV = 1 | - | 540 kHz | - | |
| Voltage Noise Density | en | f = 1 kHz | - | 12 nV/√Hz | - |
Key Features
- Very low offset voltage: 10 μV typical, 125 μV maximum.
- Low input bias current: Input bias current cancellation circuitry providing very low input bias current over the full operating temperature range.
- Rail-to-rail output swing: Operates from ±2.5 V to ±15 V supply voltages.
- Low noise: 0.2 μV p-p (0.1 Hz to 10 Hz) and 12 nV/√Hz at 1 kHz.
- Low power consumption: Maximum supply current of 350 μA per amplifier.
- High precision: Offset drift of 0.5 μV/°C and high common-mode rejection ratio (CMRR).
Applications
- Portable precision instrumentation
- Laser diode control loops
- Strain gage amplifiers
- Medical instrumentation
- Thermocouple amplifiers
Q & A
- What is the typical offset voltage of the AD8624?
The typical offset voltage of the AD8624 is 10 μV.
- What is the operating temperature range of the AD8624?
The AD8624 operates over a temperature range of -40°C to +125°C.
- What is the maximum supply current per amplifier for the AD8624?
The maximum supply current per amplifier is 350 μA.
- What is the slew rate of the AD8624?
The slew rate of the AD8624 is 0.28 V/μs for RL = 10 kΩ, CL = 100 pF, and AV = 1.
- What are the key applications of the AD8624?
The AD8624 is used in portable precision instrumentation, laser diode control loops, strain gage amplifiers, medical instrumentation, and thermocouple amplifiers.
- What is the gain bandwidth product of the AD8624?
The gain bandwidth product of the AD8624 is 540 kHz for RL = 10 kΩ, CL = 20 pF, and AV = 1.
- How much noise does the AD8624 generate?
The AD8624 generates 0.2 μV p-p noise from 0.1 Hz to 10 Hz and has a voltage noise density of 12 nV/√Hz at 1 kHz.
- What is the output voltage swing of the AD8624?
The AD8624 has a rail-to-rail output swing, operating from ±2.5 V to ±15 V supply voltages.
- Is the AD8624 suitable for low power applications?
Yes, the AD8624 is suitable for low power applications due to its low supply current of 350 μA per amplifier.
- What is the common-mode rejection ratio (CMRR) of the AD8624?
The CMRR of the AD8624 is typically 120 dB to 145 dB over the operating temperature range.
