Overview
The AD7538KR-REEL is a 14-bit monolithic CMOS digital-to-analog converter (DAC) produced by Analog Devices Inc. This device utilizes laser-trimmed thin-film resistors to achieve excellent linearity and is manufactured using the linear-compatible CMOS (LC2MOS) process. It is designed to be speed compatible with most microprocessors and accepts TTL or CMOS logic level inputs. The AD7538KR-REEL is packaged in a 24-lead SOIC (Wide) and is suitable for various applications requiring high precision and reliability.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 14 bits | |
| Operating Temperature Range | 0°C to +70°C (J, K Versions) | |
| Power Supply Voltage | +12 V to +15 V (±5% tolerance) | V |
| Output Leakage Current | Low leakage configuration | |
| Package Type | 24-Lead SOIC (Wide) | |
| Input Logic Levels | TTL or CMOS compatible | |
| Monotonicity | Guaranteed monotonic to 14 bits over full temperature range | |
| Write Pulse Width | 140 ns to 180 ns | ns |
| LDAC Pulse Width | 170 ns to 240 ns | ns |
Key Features
- Guaranteed Monotonicity: The AD7538 is guaranteed monotonic to 14 bits over the full temperature range for all grades.
- Low Cost: Offers a low-cost solution for 12-bit system upgrades with its 14-bit dynamic range.
- Small Package Size: Available in a small 24-pin, 0.3" DIP and a 24-pin SOIC.
- Low Output Leakage: Achieves low output leakage current at high temperatures by tying VSS to a negative voltage.
- Wide Power Supply Tolerance: Operates on a +12 V to +15 V VDD with a ±5% tolerance.
- Double Buffering: Optional double buffering using LDAC allows simultaneous updates in systems with multiple AD7538s.
Applications
- Digital Audio: Suitable for precision audio applications requiring high linearity and low distortion.
- Precision Servo Control: Used in servo control systems where precise analog output is necessary.
- High Temperature Environments: Ideal for control and measurement in high temperature environments due to its wide operating temperature range.
Q & A
- What is the resolution of the AD7538KR-REEL?
The AD7538KR-REEL has a resolution of 14 bits.
- What is the operating temperature range of the AD7538KR-REEL?
The operating temperature range is 0°C to +70°C for J and K versions.
- What type of logic levels does the AD7538KR-REEL accept?
The AD7538KR-REEL accepts TTL or CMOS logic level inputs.
- What is the package type of the AD7538KR-REEL?
The AD7538KR-REEL is packaged in a 24-Lead SOIC (Wide).
- Is the AD7538KR-REEL monotonic over its full temperature range?
Yes, the AD7538KR-REEL is guaranteed monotonic to 14 bits over the full temperature range for all grades.
- How does the AD7538KR-REEL achieve low output leakage current?
The AD7538KR-REEL achieves low output leakage current by tying VSS to a negative voltage.
- What is the power supply voltage range for the AD7538KR-REEL?
The power supply voltage range is +12 V to +15 V with a ±5% tolerance.
- Does the AD7538KR-REEL support double buffering?
Yes, the AD7538KR-REEL supports optional double buffering using the LDAC pin.
- What are some typical applications of the AD7538KR-REEL?
Typical applications include digital audio, precision servo control, and control and measurement in high temperature environments.
- Is the AD7538KR-REEL still in production?
No, the AD7538KR-REEL is no longer manufactured, but substitutes or alternative package types may be available.
