Overview
The AD8628AUJZ-REEL7 is a high-precision, single-supply, rail-to-rail input and output operational amplifier produced by Analog Devices Inc. This amplifier is part of the AD8628/AD8629/AD8630 series, known for its ultralow offset, drift, and bias current. It is designed to offer high accuracy and low noise, making it suitable for a variety of sensitive measurement applications in harsh operating environments.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Offset Voltage | VOS | −40°C ≤ TA ≤ +125°C | 1 | 5 | 10 | µV |
| Input Offset Drift | ∆VOS/∆T | −40°C ≤ TA ≤ +125°C | 0.002 | 0.02 | µV/°C | |
| Input Bias Current | IB | −40°C ≤ TA ≤ +125°C | 30 | 100 | 1.5 nA | pA |
| Supply Current | IS | −40°C ≤ TA ≤ +125°C | 0.85 | 1.0 | 1.2 | mA |
| Common-Mode Rejection Ratio | CMRR | VCM = 0 V to 5 V | 120 | 130 | 140 | dB |
| Large Signal Voltage Gain | AVO | RL = 10 kΩ, VO = 0.3 V to 4.7 V | 125 | 135 | 145 | dB |
| Output Voltage High | VOH | RL = 100 kΩ to ground | 4.99 | 4.996 | V | |
| Storage Temperature Range | −65°C | +150°C | °C | |||
| Operating Temperature Range | −40°C | +125°C | °C |
Key Features
- Lowest Auto-Zero Amplifier Noise: The AD8628AUJZ-REEL7 features the lowest noise among auto-zero amplifiers, making it ideal for high-precision applications.
- Low Offset Voltage: With a typical offset voltage of less than 1 µV, this amplifier ensures minimal output voltage errors even at high gains.
- Input Offset Drift: The extremely small temperature drift of 0.002 µV/°C ensures stable performance over a wide temperature range.
- Rail-to-Rail Input and Output Swing: This feature allows the amplifier to operate effectively with input and output signals that range from the negative supply rail to the positive supply rail.
- 5 V Single-Supply Operation: The amplifier can operate with a single 5 V supply, simplifying circuit design and reducing component count.
- High Gain, CMRR, and PSRR: With high common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR) of 130 dB, this amplifier provides excellent immunity to noise and interference.
- Very Low Input Bias Current: The maximum input bias current of 100 pA minimizes the impact on the input signal.
- Low Supply Current: The amplifier consumes a low supply current of 1.0 mA, making it suitable for power-sensitive applications.
- No External Components Required: The amplifier does not require any external components, simplifying the design process.
Applications
- Automotive Sensors: Qualified for automotive applications, these amplifiers are used in various automotive sensing systems.
- Pressure and Position Sensors: Ideal for precision measurement in pressure and position sensing applications.
- Strain Gage Amplifiers: Used in strain gage applications where high precision and low noise are critical.
- Medical Instrumentation: Suitable for medical devices requiring high accuracy and low noise.
- Thermocouple Amplifiers: Used in thermocouple applications to amplify small temperature differences accurately.
- Precision Current Sensing: Ideal for precision current sensing applications due to its low input bias current.
- Photodiode Amplifiers: Used in photodiode applications where low noise and high precision are necessary.
Q & A
- What is the typical offset voltage of the AD8628AUJZ-REEL7?
The typical offset voltage is less than 1 µV.
- What is the input offset drift of the AD8628AUJZ-REEL7?
The input offset drift is 0.002 µV/°C.
- Does the AD8628AUJZ-REEL7 require any external components?
No, it does not require any external components.
- What is the common-mode rejection ratio (CMRR) of the AD8628AUJZ-REEL7?
The CMRR is 130 dB.
- What is the maximum input bias current of the AD8628AUJZ-REEL7?
The maximum input bias current is 100 pA.
- What is the operating temperature range of the AD8628AUJZ-REEL7?
The operating temperature range is −40°C to +125°C.
- Is the AD8628AUJZ-REEL7 qualified for automotive applications?
- What is the supply current of the AD8628AUJZ-REEL7?
The supply current is typically 1.0 mA.
- Does the AD8628AUJZ-REEL7 have rail-to-rail input and output swing?
- What is the voltage noise density of the AD8628AUJZ-REEL7 at 1 kHz?
The voltage noise density at 1 kHz is 22 nV/√Hz.
