Overview
The AD7226KPZ, produced by Analog Devices Inc., is a quad 8-bit digital-to-analog converter (DAC) integrated into a single monolithic chip. This device features four voltage-output DACs, each with an output buffer amplifier and interface logic, eliminating the need for external trims to achieve full specified performance. The AD7226KPZ is fabricated using an all ion-implanted high speed Linear Compatible CMOS (LC2MOS) process, allowing for the integration of high-speed digital logic and precision analog circuits on the same chip.
The device is designed for microprocessor compatibility, with a common 8-bit TTL/CMOS-compatible input port and individual DAC latches controlled by level-triggered latch enable signals. This makes it versatile for simple interface to microprocessors.
Key Specifications
| Parameter | Unit | Conditions/Comments |
|---|---|---|
| Number of Bits | 8 | - |
| Number of D/A Converters | 4 | - |
| Settling Time | 4 μs | - |
| Data Interface | Parallel | - |
| Reference Type | External | - |
| Voltage - Supply, Analog | 11.4 V to 16.5 V, -5 V | Dual supply operation |
| Voltage - Supply, Digital | 14.25 V to 15.75 V | - |
| INL/DNL (LSB) | ±0.5 (Max), ±1 (Max) | - |
| Output Type | Voltage - Buffered | - |
| Differential Output | No | - |
| Architecture | R-2R | - |
| Operating Temperature | -40°C to 85°C | - |
| Package / Case | 20-LCC (J-Lead) | 20-PLCC (9x9) |
Key Features
- DAC-to-DAC Matching: Precise matching and tracking between the DACs due to fabrication on the same chip.
- Single-Supply Operation: The voltage mode configuration allows operation from a single power supply rail.
- Microprocessor Compatibility: Common 8-bit data bus with individual DAC latches, compatible with most 8-bit microprocessors.
- Small Size: Combines four DACs, four op amps, and interface logic into a 20-pin package, reducing board space requirements and increasing reliability.
- No User Trims: No external trims required to achieve full specified performance.
- Extended Temperature Range Operation: Operates over a temperature range of -40°C to 85°C.
Applications
- Process Control: Suitable for precise control in industrial processes.
- Automatic Test Equipment: Used in automated testing systems for calibration and measurement.
- Automatic Calibration of Large System Parameters: Ideal for adjusting gain and offset in complex systems.
Q & A
- What is the AD7226KPZ?
The AD7226KPZ is a quad 8-bit digital-to-analog converter (DAC) produced by Analog Devices Inc.
- How many DACs does the AD7226KPZ contain?
The AD7226KPZ contains four 8-bit voltage-output DACs.
- What is the settling time of the AD7226KPZ?
The settling time of the AD7226KPZ is 4 μs.
- Is the AD7226KPZ compatible with microprocessors?
Yes, the AD7226KPZ is microprocessor-compatible with a common 8-bit TTL/CMOS-compatible input port.
- What is the operating temperature range of the AD7226KPZ?
The operating temperature range is -40°C to 85°C.
- Does the AD7226KPZ require external trims?
No, the AD7226KPZ does not require external trims to achieve full specified performance.
- What is the reference voltage range for the AD7226KPZ?
The reference voltage range is from 2 V to 12.5 V with dual supplies, and it can also operate with a single supply at a reference of 10 V.
- What type of package does the AD7226KPZ come in?
The AD7226KPZ comes in a 20-PLCC (9x9) package.
- What are some typical applications of the AD7226KPZ?
Typical applications include process control, automatic test equipment, and automatic calibration of large system parameters.
- What is the architecture of the DACs in the AD7226KPZ?
The DACs in the AD7226KPZ use an R-2R architecture.
