Overview
The AD538SD/883B, produced by Analog Devices Inc., is a monolithic real-time analog computational circuit. This device provides precision analog multiplication, division, and exponentiation, making it highly versatile for various analog signal processing tasks. The AD538SD/883B is known for its low input and output offset voltages and excellent linearity, ensuring accurate computations over a wide dynamic range. Laser wafer trimming enables multiplication and division with errors as low as 0.25% of reading, and the device features a 400 kHz bandwidth for real-time signal processing.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 18-Lead Side-Brazed Ceramic Dual In-Line Package (DIP) |
| Temperature Range | -55°C to +125°C (Military Grade) |
| Power Supply Range | ±4.5 V to ±18 V |
| Bandwidth | 400 kHz |
| Input Offset Voltage | < 100 µV |
| Error (100:1 Range) | ±0.25% of Reading |
| On-Chip References | +2 V and +10 V |
| Dynamic Range (Denominator) | 1000:1 |
Key Features
- Simultaneous multiplication and division capabilities
- Resistor-programmable powers and roots
- No external trims required
- Low input and output offset voltages
- Wide power supply range (±4.5 V to ±18 V)
- Access to multiple summing junctions for increased flexibility
- Exponentiation with an m value from 0.2 to 5 using external resistors
- Direct log ratio computation possible
Applications
- One- or two-quadrant multiply/divide operations
- Log ratio computation
- Squaring/square rooting
- Trigonometric function approximations
- Linearization via curve fitting
- Precision Automatic Gain Control (AGC)
- Power functions
Q & A
- What is the primary function of the AD538SD/883B?
The AD538SD/883B is a real-time analog computational circuit that provides precision analog multiplication, division, and exponentiation.
- What is the temperature range for the AD538SD/883B?
The temperature range for the AD538SD/883B is -55°C to +125°C.
- What is the bandwidth of the AD538SD/883B?
The bandwidth of the AD538SD/883B is 400 kHz.
- How is the desired scale factor set for multiplication and division?
The desired scale factor can be set using the on-chip +2 V or +10 V references, or controlled externally.
- Can the AD538SD/883B perform exponentiation?
- What is the dynamic range of the denominator for the AD538SD/883B?
The dynamic range of the denominator is 1000:1.
- Does the AD538SD/883B require external trims?
No, the AD538SD/883B does not require external trims.
- What are the typical input offset voltages for the AD538SD/883B?
The typical input offset voltages are less than 100 µV.
- Can the AD538SD/883B be used for log ratio computation?
- What types of power supplies can the AD538SD/883B operate from?
The AD538SD/883B can operate from standard ±5 V, ±12 V, and ±15 V power supplies.
