Overview
The AD7846KP, produced by Analog Devices Inc., is a 16-bit voltage output Digital-to-Analog Converter (DAC) constructed using the LC2MOS process. This device features VREF+ and VREF− reference inputs and an on-chip output amplifier, allowing for configurable unipolar output ranges (0 V to +5 V, 0 V to +10 V) or bipolar output ranges (±5 V, ±10 V). The DAC employs a segmented architecture, ensuring 16-bit monotonicity and excellent integral linearity due to the tight matching between the input offset voltages of the two buffer amplifiers. It also includes a comprehensive microprocessor interface with 16 data I/O pins and control lines such as CS, R/W, LDAC, and CLR, facilitating readback functions and simultaneous updating of DACs in multi-DAC systems.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Number of Bits | 16 | - | - |
| Output Type | Voltage - Buffered | - | - |
| Output Range | Unipolar: 0 V to +5 V, 0 V to +10 V; Bipolar: ±5 V, ±10 V | V | - |
| Supply Voltage (Digital) | +4.75 V to +5.25 V | V | - |
| Supply Voltage (Analog) | ±11.4 V to ±15.75 V | V | - |
| Power Dissipation | 100 mW | mW | Typical, unloaded |
| Settling Time | 9 µs | µs | - |
| Integral Linearity (INL) | ±8 LSB (max) | LSB | - |
| Differential Linearity (DNL) | ±0.5 LSB (max) | LSB | - |
| Operating Temperature | 0°C to +70°C (J, K Versions); –40°C to +85°C (A, B Versions) | °C | - |
| Package Type | 28-lead PLCC, plastic, ceramic | - | - |
Key Features
- 16-Bit Monotonicity: Ensures accurate and reliable performance over the entire temperature range.
- Comprehensive Microprocessor Interface: Includes 16 data I/O pins and control lines (CS, R/W, LDAC, and CLR) for readback functions and simultaneous updating of DACs.
- Low Power Dissipation: 100 mW typical, making it the lowest power, high accuracy DAC in its class.
- Segmented Architecture: Uses a 16-resistor string with buffered amplifiers to achieve high resolution and linearity.
- Configurable Output Ranges: Supports both unipolar and bipolar output configurations.
- Readback Function: Allows reading back the DAC register contents, useful in Automated Test Equipment (ATE) applications.
Applications
The AD7846KP is suitable for various applications requiring high accuracy and precision, including:
- Automated Test Equipment (ATE): The readback function and comprehensive microprocessor interface make it ideal for ATE systems.
- Closed-Loop Systems: The guaranteed 16-bit monotonicity and excellent linearity ensure reliable performance in closed-loop applications.
- Industrial Control Systems: Its low power dissipation and high accuracy make it a good fit for industrial control environments.
- Medical Devices: The precision and reliability of the AD7846KP are beneficial in medical equipment where accuracy is critical.
Q & A
- What is the resolution of the AD7846KP DAC?
The AD7846KP has a resolution of 16 bits. - What are the configurable output ranges of the AD7846KP?
The AD7846KP can be configured for unipolar output ranges (0 V to +5 V, 0 V to +10 V) or bipolar output ranges (±5 V, ±10 V). - What is the power dissipation of the AD7846KP?
The power dissipation is typically 100 mW. - What is the settling time of the AD7846KP?
The settling time is 9 µs. - Does the AD7846KP support readback functions?
Yes, it supports readback functions through its comprehensive microprocessor interface. - What are the operating temperature ranges for the AD7846KP?
The operating temperature ranges are 0°C to +70°C (J, K Versions) and –40°C to +85°C (A, B Versions). - In what packages is the AD7846KP available?
The AD7846KP is available in 28-lead PLCC, plastic, and ceramic packages. - What is the architecture of the AD7846KP DAC?
The AD7846KP uses a segmented architecture with a 16-resistor string and buffered amplifiers. - Is the AD7846KP lead-free and RoHS compliant?
Yes, the AD7846KP is lead-free and RoHS compliant. - What are the typical applications of the AD7846KP?
The AD7846KP is typically used in Automated Test Equipment (ATE), closed-loop systems, industrial control systems, and medical devices.
