Overview
The AD7846KPZ is a 16-bit Digital-to-Analog Converter (DAC) produced by Analog Devices Inc. It is constructed using the LC2MOS process and features VREF+ and VREF− reference inputs along with an on-chip output amplifier. This DAC is designed to provide high accuracy and reliability, making it suitable for various applications requiring precise analog output.
The AD7846KPZ can be configured for both unipolar and bipolar output ranges, including 0 V to +5 V, 0 V to +10 V, ±5 V, and ±10 V. It uses a segmented architecture to ensure 16-bit monotonicity and excellent integral linearity.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Resolution | 16 bits | ||
| Number of Channels | 1 | ||
| Output Type | Voltage - Buffered | ||
| Output Range | 0 V to +5 V, 0 V to +10 V, ±5 V, ±10 V | V | Configurable |
| Settling Time | 9 µs | µs | |
| Power Dissipation | 100 mW | mW | |
| Operating Temperature | 0°C to 70°C | °C | |
| Package Type | 28-Lead PLCC | ||
| INL/DNL | ±8 (Max), ±0.5 (Max) | LSB | |
| Input High Voltage (VIH) | 2.4 V min | V | |
| Input Low Voltage (VIL) | 0.8 V max | V | |
| Input Current (IIN) | ±10 µA max | µA | |
| Input Capacitance (CIN) | 10 pF max | pF | |
| Output Low Voltage (VOL) | 0.4 V max | V | ISINK = 1.6 mA |
| Output High Voltage (VOH) | 4.0 V min | V | ISOURCE = 400 µA |
Key Features
- 16-Bit Monotonicity: Guaranteed 16-bit monotonicity over temperature, making it ideal for closed-loop applications.
- Readback Function: Ability to read back the DAC register contents, useful in Automated Test Equipment (ATE) systems.
- Low Power Dissipation: Power dissipation of 100 mW, making it the lowest power, high accuracy DAC on the market.
- Comprehensive Microprocessor Interface: Includes 16 data I/O pins and control lines (CS, R/W, LDAC, and CLR) for flexible control and readback functions.
- Segmented Architecture: Uses a segmented architecture with a 16-resistor string and buffer amplifiers to ensure high resolution and linearity.
- On-Chip Output Amplifier: Features VREF+ and VREF− reference inputs and an on-chip output amplifier for direct voltage output.
Applications
- Automated Test Equipment (ATE): The readback function and low power consumption make it suitable for ATE applications.
- Closed-Loop Systems: Ideal for closed-loop applications due to its guaranteed 16-bit monotonicity over temperature.
- Industrial Control Systems: Used in industrial control systems where precise analog output is required.
- Medical Devices: Suitable for medical devices that require high accuracy and reliability in analog output.
- Aerospace and Defense: Used in military and aerospace applications due to its robust specifications and reliability.
Q & A
- What is the resolution of the AD7846KPZ DAC?
The AD7846KPZ has a resolution of 16 bits.
- What are the possible output ranges for the AD7846KPZ?
The AD7846KPZ can be configured for output ranges of 0 V to +5 V, 0 V to +10 V, ±5 V, and ±10 V.
- What is the settling time of the AD7846KPZ?
The settling time of the AD7846KPZ is 9 µs.
- What is the power dissipation of the AD7846KPZ?
The power dissipation of the AD7846KPZ is 100 mW.
- What type of package is the AD7846KPZ available in?
The AD7846KPZ is available in a 28-Lead PLCC package.
- What is the operating temperature range of the AD7846KPZ?
The operating temperature range of the AD7846KPZ is 0°C to 70°C.
- Does the AD7846KPZ have a readback function?
Yes, the AD7846KPZ has a readback function that allows reading back the DAC register contents.
- What is the purpose of the LDAC line in the AD7846KPZ?
The LDAC line allows for simultaneous updating of DACs in a multi-DAC system.
- How does the CLR line function in the AD7846KPZ?
The CLR line resets the contents of the DAC latch to 00…000 or 10…000 depending on the state of R/W, allowing the DAC output to be reset to 0 V.
- Is the AD7846KPZ RoHS compliant?
Yes, the AD7846KPZ is lead-free and RoHS compliant.
