Overview
The AD7247AANZ, produced by Analog Devices Inc., is an enhanced version of the industry-standard AD7247. This component is a complete, dual, 12-bit, voltage output digital-to-analog converter (DAC) integrated on a monolithic CMOS chip. It features output amplifiers and a Zener voltage reference, eliminating the need for external user trims to achieve full specified performance. The AD7247AANZ is designed for high-speed data transfer and is compatible with most modern microprocessors, making it suitable for a variety of applications requiring precise analog output control.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12 | Bits |
| Power Supply Range | 12 V to 15 V | V |
| Output Voltage Ranges | 0 V to +5 V, 0 V to +10 V, ±5 V | V |
| Output Amplifier Capability | +10 V across a 2 kΩ load to GND | V |
| Interface Type | Parallel (12-bit data) | |
| Chip Select Inputs | Active low logic inputs for each DAC | |
| Write Input | Active low logic input | |
| Package Type | 24-Lead PDIP | |
| Operating Temperature Range | –40°C to +85°C | °C |
Key Features
- Dual 12-bit DAC with output amplifiers and Zener voltage reference on a single CMOS chip.
- Operation from 12 V to 15 V power supplies.
- Faster interface times and better reference variations with VDD.
- Faster settling times compared to previous models.
- No external user trims required for full specified performance.
- Microprocessor compatible with high-speed data latches and interface logic.
- REF OUT/REF IN function allowing use of on-chip or external reference voltage.
- Asynchronous LDAC signal for updating DAC latches and analog outputs.
- ESD protection circuitry to prevent damage from electrostatic discharges.
Applications
- Industrial control systems requiring precise analog output control.
- Aerospace and defense applications where high reliability and small footprint are crucial.
- Medical devices needing accurate and stable analog signals.
- Automotive systems that require robust and reliable DAC performance.
- Test and measurement equipment where high precision is essential.
Q & A
- What is the resolution of the AD7247AANZ?
The AD7247AANZ has a resolution of 12 bits.
- What is the power supply range for the AD7247AANZ?
The AD7247AANZ operates from 12 V to 15 V power supplies.
- What are the available output voltage ranges for the AD7247AANZ?
The output voltage ranges are 0 V to +5 V, 0 V to +10 V, and ±5 V.
- How does the AD7247AANZ interface with microprocessors?
The AD7247AANZ is microprocessor compatible with high-speed data latches and interface logic, accepting 12-bit parallel data.
- Can the AD7247AANZ use an external reference voltage?
Yes, the AD7247AANZ provides a REF OUT/REF IN function allowing the use of either the on-chip 5 V reference or an external reference voltage.
- What is the significance of the LDAC signal in the AD7247AANZ?
The LDAC signal is asynchronous and updates the DAC latches and analog outputs on its rising edge, useful for simultaneous updating of multiple devices.
- What package types are available for the AD7247AANZ?
The AD7247AANZ is available in a 24-Lead PDIP package among others.
- What is the operating temperature range for the AD7247AANZ?
The operating temperature range is –40°C to +85°C.
- Does the AD7247AANZ require external user trims for full performance?
No, the AD7247AANZ does not require external user trims to achieve full specified performance.
- Is the AD7247AANZ protected against electrostatic discharges?
Yes, the AD7247AANZ features proprietary ESD protection circuitry to prevent damage from electrostatic discharges.
