Overview
The AD526ADZ is a single-ended, monolithic software programmable gain amplifier (SPGA) produced by Analog Devices Inc. This device is designed to provide programmable gains of 1, 2, 4, 8, and 16, making it ideal for precision instrumentation applications that require adjustable gain settings. The AD526ADZ includes an amplifier, a resistor network, and TTL-compatible latched inputs, eliminating the need for external components. It offers excellent DC accuracy and low gain error, achieved through Analog Devices' laser trimming technology.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Programmable Gains | 1, 2, 4, 8, 16 | - |
| Gain Error (C Grade) | 0.01% (G = 1, 2, 4), 0.02% (G = 8, 16) | % |
| Temperature Drift | 0.5 ppm/°C | ppm/°C |
| Nonlinearity (J Grade) | ±0.005% FSR Max | % |
| Settling Time (Gain = 16) | 0.01% in 4.5 µs (10 V Signal Change), 0.01% in 5.6 µs (Gain Change) | µs |
| Offset Voltage (C Grade) | 0.5 mV Max | mV |
| Offset Voltage Drift (C Grade) | 3 µV/°C | µV/°C |
| Small Signal Bandwidth (Gain = 16) | 350 kHz | kHz |
| Bias Current | 50 pA | pA |
| Operating Temperature Range | -40°C to +85°C (Industrial Grades), -55°C to +125°C (S Grade) | °C |
Key Features
- Digitally programmable binary gains from 1 to 16, with two-chip cascade mode achieving gains from 1 to 256.
- Low gain error and low nonlinearity, making it suitable for precision instrumentation.
- Fast settling time: 0.01% in 4.5 µs for a 10 V signal change and 0.01% in 5.6 µs for a gain change at a gain of 16.
- Excellent DC accuracy with a maximum input offset voltage of 0.5 mV and an offset voltage drift of 3 µV/°C.
- TTL-compatible digital inputs and the ability to operate in either latched or transparent mode.
- Force/sense configuration to preserve accuracy with remote or low impedance loads.
- Low bias current of 50 pA due to the FET-input stage.
Applications
The AD526ADZ is ideal for precision instrumentation applications that require programmable gain, such as:
- Medical equipment and diagnostic instruments.
- Industrial process control and measurement systems.
- Aerospace and defense systems requiring high precision and reliability.
- Automotive and automotive safety systems.
- High-precision data acquisition systems.
Q & A
- What are the programmable gain settings of the AD526ADZ?
The AD526ADZ provides programmable gains of 1, 2, 4, 8, and 16.
- What is the maximum gain error for the AD526ADZ?
The maximum gain error is 0.01% for gains of 1, 2, and 4, and 0.02% for gains of 8 and 16 (C Grade).
- How does the AD526ADZ handle temperature drift?
The AD526ADZ has a temperature drift of 0.5 ppm/°C.
- What is the nonlinearity of the AD526ADZ?
The nonlinearity is ±0.005% FSR Max (J Grade).
- How fast does the AD526ADZ settle?
The settling time is 0.01% in 4.5 µs for a 10 V signal change and 0.01% in 5.6 µs for a gain change at a gain of 16.
- What is the maximum input offset voltage of the AD526ADZ?
The maximum input offset voltage is 0.5 mV (C Grade).
- Can the AD526ADZ operate in different modes?
Yes, the AD526ADZ can operate in either latched or transparent mode.
- What is the bias current of the AD526ADZ?
The bias current is 50 pA due to the FET-input stage.
- What are the operating temperature ranges for the AD526ADZ?
The operating temperature ranges are -40°C to +85°C for industrial grades and -55°C to +125°C for the S grade.
- What types of applications is the AD526ADZ suitable for?
The AD526ADZ is suitable for precision instrumentation applications, including medical equipment, industrial process control, aerospace, automotive, and high-precision data acquisition systems.
