Overview
The ADA4625-2ARDZ-RL, produced by Analog Devices Inc., is a high-performance operational amplifier (op-amp) known for its low noise, fast settling, and rail-to-rail output capabilities. This device is part of the ADA4625 series, which builds on Analog Devices' high voltage, single-supply, precision junction field effect transistor (JFET) input op-amps. It is designed to provide optimal performance in high voltage, high gain, and low noise applications, making it particularly suitable for a variety of demanding analog signal processing tasks.
Key Specifications
| Parameter | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Bias Current | Ib | TA = 25°C | - | ±15 pA | - | pA |
| Offset Voltage | Vos | TA = 25°C | - | ±80 µV | - | µV |
| Offset Voltage Drift | TCVos | −40°C to 85°C | - | ±1.2 µV/°C | - | µV/°C |
| Slew Rate | SR | VOUT = ±10 V, RL = 2 kΩ, AV = −1 | - | 48 V/µs | - | V/µs |
| Gain Bandwidth Product | GBP | AV = 100 | - | 18 MHz | - | MHz |
| Unity-Gain Crossover Frequency | UGC | AV = 1 | - | 12.4 MHz | - | MHz |
| -3 dB Bandwidth | - | AV = 1 | - | 16 MHz | - | MHz |
| Phase Margin | ΦΜ | ADA4625-2 | - | 75 Degrees | - | Degrees |
| Supply Voltage Range | VSY | Dual-supply: ±2.5 V to ±18 V, Single-supply: 5 V to 36 V | - | - | - | V |
| Supply Current per Amplifier | ISY | VOUT = 0 V | - | 4.5 mA | 5 mA | mA |
| Output Short-Circuit Current | ISC | - | - | ±46 mA | - | mA |
Key Features
- Low Input Bias Current: ±15 pA typical at TA = 25°C, ensuring minimal current draw from the input signal.
- Low Offset Voltage and Drift: ±80 µV maximum offset voltage and ±1.2 µV/°C maximum offset voltage drift, providing high precision and stability over temperature.
- Fast Settling Time: 0.01% in 700 ns typical, which is crucial for applications requiring quick response times.
- Wide Operating Voltage Range: Dual-supply operation from ±2.5 V to ±18 V and single-supply operation from 5 V to 36 V, offering flexibility in various power supply configurations.
- Rail-to-Rail Output: The output voltage swings rail to rail, maximizing dynamic output range in low voltage, single supply applications.
- High Capacitive Load Drive Capability: Able to drive high capacitive loads without significant degradation in performance.
- No Phase Reversal: Ensures that the output does not reverse phase under any input conditions, maintaining signal integrity.
Applications
- PLL Filter Amplifiers: Suitable for phase-locked loop (PLL) applications due to its low noise and wide bandwidth.
- Transimpedance Amplifiers: Ideal for converting current signals into voltage signals with high accuracy.
- Photodiode Sensor Interfaces: Used in photodiode sensor interfaces where low noise and high sensitivity are required.
- Low Noise Charge Amplifiers: Applicable in charge amplification where minimal noise is critical.
- Active Filter Amplifiers and Voltage Controlled Oscillators (VCOs): Suitable for high tuning voltage (VTUNE) and preamplifiers where low-level signals need high amplification and wide bandwidth.
Q & A
- What is the typical input bias current of the ADA4625-2?
The typical input bias current is ±15 pA at TA = 25°C.
- What is the maximum offset voltage of the ADA4625-2?
The maximum offset voltage is ±80 µV at TA = 25°C.
- What is the settling time of the ADA4625-2 to 0.01%?
The settling time to 0.01% is typically 700 ns.
- What is the operating voltage range for the ADA4625-2?
The ADA4625-2 can operate in dual-supply mode from ±2.5 V to ±18 V and in single-supply mode from 5 V to 36 V.
- Does the ADA4625-2 have rail-to-rail output capability?
Yes, the ADA4625-2 has rail-to-rail output capability, allowing the output voltage to swing from the negative supply rail to the positive supply rail.
- What is the maximum output short-circuit current of the ADA4625-2?
The maximum output short-circuit current is ±46 mA.
- Is the ADA4625-2 suitable for high capacitive load drive?
Yes, the ADA4625-2 has high capacitive load drive capability, making it suitable for driving high capacitive loads without significant performance degradation.
- What are some common applications of the ADA4625-2?
Common applications include PLL filter amplifiers, transimpedance amplifiers, photodiode sensor interfaces, low noise charge amplifiers, and active filter amplifiers and VCOs.
- Does the ADA4625-2 exhibit phase reversal?
No, the ADA4625-2 does not exhibit phase reversal under any input conditions, ensuring signal integrity.
- What is the gain bandwidth product of the ADA4625-2?
The gain bandwidth product is 18 MHz for a gain of 100.
