Overview
The AD8512ARMZ from Analog Devices Inc. is a precision, dual-channel JFET operational amplifier known for its low noise, low input bias current, and high accuracy. This amplifier is particularly suited for applications requiring high impedance sensor amplification, precise current measurements using shunts, and superior performance in medical instruments, electronic measurement, and automated test equipment. The AD8512ARMZ features a combination of DC precision, low noise, and fast settling time, making it an excellent choice for various high-performance applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | |||
|---|---|---|---|---|---|---|
| Input Offset Voltage | Vos | 0.1 | 0.9 | mV | ||
| Input Bias Current | Ib | VS = ±15 V | 25 | pA | ||
| Supply Current/Amplifier | ISY | VO = 0 V, −40°C < TA < +125°C | 2.0 | 2.5 | 2.6 | mA |
| Slew Rate | SR | RL = 2 kΩ | 20 | V/μs | ||
| Gain Bandwidth Product | GBP | 8 | MHz | |||
| Settling Time | tS | To 0.1%, 0 V to 4 V step, G = +1 | 0.4 | μs | ||
| Output Current | IOUT | ±40 | ±54 | ±70 | mA | |
| Operating Temperature Range | TA | −40 | +125 | °C | ||
| Power Supply Rejection Ratio | PSRR | VS = ±4.5 V to ±18 V | 86 | 130 | dB | |
| Noise Voltage Density | en | f = 1 kHz | 8.0 | 10 | nV/√Hz |
Key Features
- Low input offset voltage (max 0.9 mV) and low offset voltage drift (typ 1.7 μV/°C)
- Very low input bias current (typ 25 pA at VS = ±15 V)
- Low noise (typ 8 nV/√Hz at f = 1 kHz)
- Fast settling time (typ 0.4 μs to 0.1%, 0 V to 4 V step, G = +1)
- High slew rate (typ 20 V/μs at RL = 2 kΩ)
- No phase reversal and unity-gain stability
- Dual-supply operation (±4.5 V to ±18 V)
- High output current (±70 mA per channel)
- Operating temperature range of −40°C to +125°C
- Available in 8-lead MSOP and other packages
Applications
- High impedance sensor amplification
- Precise current measurements using shunts
- Medical instruments
- Electronic measurement and automated test equipment
- Audio applications due to low noise and distortion
- Instrumentation, multipole filters, and photodiode amplifiers
- Sensors and other high-performance applications
Q & A
- What is the typical input offset voltage of the AD8512ARMZ?
The typical input offset voltage is 0.1 mV, with a maximum of 0.9 mV.
- What is the input bias current of the AD8512ARMZ?
The input bias current is typically 25 pA at VS = ±15 V.
- What is the slew rate of the AD8512ARMZ?
The slew rate is typically 20 V/μs at RL = 2 kΩ.
- What is the gain bandwidth product of the AD8512ARMZ?
The gain bandwidth product is 8 MHz.
- What is the settling time of the AD8512ARMZ?
The settling time is typically 0.4 μs to 0.1%, for a 0 V to 4 V step, G = +1.
- What is the operating temperature range of the AD8512ARMZ?
The operating temperature range is −40°C to +125°C.
- What are the typical supply currents for the AD8512ARMZ?
The supply current per amplifier is typically 2.5 mA at VO = 0 V, −40°C < TA < +125°C.
- Does the AD8512ARMZ suffer from phase reversal?
No, the AD8512ARMZ does not suffer from phase reversal.
- What are some common applications of the AD8512ARMZ?
Common applications include high impedance sensor amplification, precise current measurements, medical instruments, electronic measurement, automated test equipment, audio applications, and more.
- In what packages is the AD8512ARMZ available?
The AD8512ARMZ is available in 8-lead MSOP and other packages.
