Overview
The ADA4625-1ARDZ-RL, produced by Analog Devices Inc., is a high-performance operational amplifier (op amp) designed for high voltage, single-supply, and rail-to-rail output applications. This device builds on Analog Devices' high voltage, single-supply, precision junction field effect transistor (JFET) input op amps, offering enhanced speed and low noise characteristics. It is particularly suited for applications requiring wide bandwidth, low noise, and high gain, making it ideal for phase-locked loop (PLL) filters, active filter amplifiers, and high tuning voltage (VTUNE) voltage-controlled oscillators (VCOs).
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 | TA = −40°C to 85°C | - | ±1.2 µV/°C | - | µV/°C |
| Supply Voltage Range | V+ | - | - | 5 V to 36 V (Single Supply) | V | |
| Supply Voltage Range | V+ | - | - | ±2.5 V to ±18 V (Dual Supply) | V | |
| 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 | ADA4625-1 | - | 88 Degrees | - | Degrees |
| 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.
- Fast Settling Time: 0.01% in 700 ns typical, allowing for quick response to input changes.
- Wide Operating Voltage Range: Supports both single-supply (5 V to 36 V) and dual-supply (±2.5 V to ±18 V) operations.
- Rail-to-Rail Output: Output voltage swings rail to rail, maximizing dynamic output range.
- High Capacitive Load Drive Capability: Can drive high capacitive loads without compromising performance).
- No Phase Reversal: Ensures stable operation without phase reversal, even under extreme input conditions).
Applications
- PLL Filter Amplifiers: Ideal for phase-locked loop applications due to its high bandwidth and low noise characteristics).
- Transimpedance Amplifiers: Suitable for converting current signals to voltage signals with high accuracy and speed).
- Photodiode Sensor Interfaces: Used in photodiode sensor interfaces where low noise and high gain are critical).
- Low Noise Charge Amplifiers: Applicable in charge amplification where minimal noise and high precision are required).
- Voltage-Controlled Oscillators (VCOs): Suitable for high tuning voltage (VTUNE) VCOs and preamplifiers where low-level signals need high amplification and wide bandwidth).
Q & A
- What is the typical input bias current of the ADA4625-1?
The typical input bias current is ±15 pA at TA = 25°C).
- What is the maximum offset voltage of the ADA4625-1?
The maximum offset voltage is ±80 µV at TA = 25°C).
- What is the settling time of the ADA4625-1 to 0.01%?
The settling time to 0.01% is 700 ns typical).
- What is the operating voltage range for the ADA4625-1?
The ADA4625-1 operates from 5 V to 36 V in single-supply mode and from ±2.5 V to ±18 V in dual-supply mode).
- Does the ADA4625-1 have rail-to-rail output capability?
Yes, the ADA4625-1 has rail-to-rail output capability).
- What is the output short-circuit current of the ADA4625-1?
The output short-circuit current is ±46 mA).
- What are some common applications of the ADA4625-1?
Common applications include PLL filter amplifiers, transimpedance amplifiers, photodiode sensor interfaces, low noise charge amplifiers, and VCOs).
- What is the gain bandwidth product of the ADA4625-1?
The gain bandwidth product is 18 MHz at a gain of 100).
- What is the phase margin of the ADA4625-1?
The phase margin is 88 degrees for the ADA4625-1).
- Can the ADA4625-1 drive high capacitive loads?
Yes, the ADA4625-1 can drive high capacitive loads without compromising performance).
