Overview
The AD538AD, produced by Analog Devices Inc., is a monolithic real-time analog computational unit (ACU) designed to perform precision analog multiplication, division, and exponentiation. This device is notable for its high accuracy and wide dynamic range, making it suitable for various complex analog signal processing tasks. The AD538AD features low input and output offset voltages and excellent linearity, ensuring accurate computations over a broad input range. Laser wafer trimming enhances its performance by reducing errors to as low as 0.25% of reading for multiplication and division within a 100:1 input range.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Nominal Transfer Function | VO = VY(VZ/VX)^m | - | ||
| Input Dynamic Range | - | - | 1000:1 | - |
| Bandwidth | - | 400 kHz | - | kHz |
| Input Offset Voltage | - | <100 μV | - | μV |
| Output Offset Voltage | - | <100 μV | - | μV |
| Error (100:1 Range) | - | ±1% of reading ±500 μV | - | - |
| Power Supply Range | ±4.5 V | - | ±18 V | V |
| Operating Temperature Range | -25°C | - | +85°C (Industrial), +125°C (Military) | °C |
| Package Type | 18-Lead TO-118 Hermetic Side-Brazed Ceramic DIP | - | ||
Key Features
- Real-time analog multiplication, division, and exponentiation.
- High accuracy with errors as low as 0.25% of reading for a 100:1 input range.
- Wide dynamic range (denominator) of up to 1000:1.
- Simultaneous multiplication and division capabilities.
- Resistor-programmable powers and roots.
- No external trims required for one-quadrant operations.
- Low input and output offset voltages (<100 μV).
- +2 V and +10 V on-chip reference voltages.
- Monolithic construction for lower cost and higher reliability.
- Access to multiple summing junctions for increased flexibility.
Applications
- One- or two-quadrant multiplication and division.
- Log ratio computation.
- Squaring and 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 AD538AD?
The AD538AD is a monolithic real-time analog computational unit that provides precision analog multiplication, division, and exponentiation.
- What is the typical error for multiplication and division within a 100:1 input range?
The typical error is ±1% of reading ±500 μV.
- What is the bandwidth of the AD538AD?
The bandwidth is 400 kHz.
- What are the on-chip reference voltages available?
The on-chip reference voltages are +2 V and +10 V.
- What is the operating temperature range for the industrial grade?
The operating temperature range for the industrial grade is -25°C to +85°C.
- What is the package type of the AD538AD?
The package type is an 18-Lead TO-118 Hermetic Side-Brazed Ceramic DIP.
- Can the AD538AD perform two-quadrant division?
- What are some common applications of the AD538AD?
- Does the AD538AD require external trims for one-quadrant operations?
- What is the power supply range of the AD538AD?
