Overview
The AD7845JPZ, produced by Analog Devices Inc., is a groundbreaking 12-bit multiplying Digital-to-Analog Converter (DAC) that integrates an on-chip amplifier. This device is fabricated using the LC2MOS process, enabling the implementation of precision linear components and digital circuitry on the same chip. It is notable for its 4-quadrant multiplying capability, making it versatile for a wide range of applications. The AD7845JPZ is designed to simplify microprocessor interfacing with its standard CS and WR signals, and it can operate in a stand-alone mode by tying these inputs to ground.
Key Specifications
| Parameter | Description |
|---|---|
| Number of Bits | 12 |
| Package Type | 28-Lead PLCC (J-Lead) |
| Supply Voltage (Analog) | ±14.25 V to ±15.75 V |
| Settling Time | 5 µs |
| Output Type | Voltage - Buffered |
| Output Range | ±10 V into a 2 kΩ load |
| Operating Temperature | 0°C to 70°C |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| INL/DNL | ±1 LSB (Max) |
Key Features
- 4-Quadrant Multiplying Capability: The AD7845JPZ is the industry's first DAC with full 4-quadrant multiplying capability, allowing for a wide range of voltage output configurations.
- On-Chip Amplifier: The device includes an internally compensated output amplifier that can supply ±10 V into a 2 kΩ load.
- Matched Application Resistors: Three application resistors (RA, RB, RC) are provided for gain ranging and voltage offsetting.
- Space-Saving Design: Available in various packages including 28-lead PLCC, 24-lead SOIC, and 24-lead DIP, reducing chip count and saving space.
- Digital Compatibility: All digital inputs are TTL and 5 V CMOS compatible, facilitating easy microprocessor interfacing.
- Low Input Offset Voltage: The amplifier's input offset voltage is low due to laser trimming at the wafer level.
Applications
- Industrial Control Systems: Suitable for applications requiring precise analog output control, such as in industrial automation and process control.
- Medical Devices: Used in medical equipment where accurate and stable analog outputs are crucial.
- Aerospace and Defense: Applicable in various military and aerospace systems requiring high precision and reliability.
- Test and Measurement Equipment: Ideal for use in test and measurement instruments that demand high accuracy and stability in analog outputs.
Q & A
- What is the resolution of the AD7845JPZ DAC?
The AD7845JPZ has a resolution of 12 bits.
- What is the output voltage range of the AD7845JPZ?
The output amplifier can supply ±10 V into a 2 kΩ load.
- What is the settling time of the AD7845JPZ?
The settling time is 5 µs.
- Is the AD7845JPZ compatible with microprocessors?
Yes, it is compatible with microprocessors as all digital inputs are TTL and 5 V CMOS compatible.
- What are the application resistors used for in the AD7845JPZ?
The application resistors (RA, RB, RC) are used for gain ranging and voltage offsetting.
- What is the operating temperature range of the AD7845JPZ?
The operating temperature range is 0°C to 70°C.
- Is the AD7845JPZ RoHS compliant?
Yes, the AD7845JPZ is lead-free and RoHS compliant.
- What are the available packages for the AD7845JPZ?
The device is available in 28-lead PLCC, 24-lead SOIC, and 24-lead DIP packages.
- How is the input offset voltage of the amplifier controlled?
The input offset voltage is low due to laser trimming at the wafer level.
- What is the moisture sensitivity level (MSL) of the AD7845JPZ?
The MSL is 1 (Unlimited).
