Overview
The AD7846KP-REEL is a 16-bit voltage output Digital-to-Analog Converter (DAC) manufactured by Analog Devices Inc. This device is constructed using the LC2MOS process and features VREF+ and VREF− reference inputs along with an on-chip output amplifier. The AD7846KP-REEL is capable of producing both unipolar and bipolar output ranges, specifically 0 V to +5 V, 0 V to +10 V, ±5 V, and ±10 V. It is designed with a segmented architecture that ensures 16-bit monotonicity and excellent integral linearity due to the tight matching between the input offset voltages of the two buffer amplifiers.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 16 bits | ||
| Output Range | 0 V to +5 V, 0 V to +10 V, ±5 V, ±10 V | ||
| 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 Resistance | 0.3 Ω typ | Ω | To 0 V |
| Short Circuit Current | ±25 mA typ | mA | To 0 V or any power supply |
| VDD | +11.4/+15.75 V min/V max | V | |
| VSS | −14.25 V to −15.75 V | V | |
| VCC | +4.75 V to +5.25 V | V |
Key Features
- Segmented Architecture: Ensures 16-bit monotonicity and excellent integral linearity.
- On-Chip Output Amplifier: Allows for flexible output configurations.
- Microprocessor Interface: Includes 16 data I/O pins and control lines (CS, R/W, LDAC, and CLR) for comprehensive control and readback functionality.
- Readback Function: Useful in Automated Test Equipment (ATE) applications.
- Simultaneous Updating: LDAC allows for simultaneous updating of DACs in multi-DAC systems.
- Reset Functionality: CLR line resets the DAC latch contents to 00…000 or 10…000 depending on the state of R/W.
- Packaging Options: Available in 28-lead plastic, ceramic, and PLCC packages.
Applications
- Closed-Loop Systems: Ideal due to its guaranteed 16-bit monotonicity over temperature.
- Automated Test Equipment (ATE): The readback function is particularly useful in ATE applications.
- Multi-DAC Systems: Supports simultaneous updating of DACs.
- Industrial Control Systems: Suitable for precise voltage output requirements.
- Medical Devices: Can be used in medical equipment requiring high precision and reliability.
Q & A
- What is the resolution of the AD7846KP-REEL DAC?
The AD7846KP-REEL has a resolution of 16 bits.
- What are the possible output ranges of the AD7846KP-REEL?
The output ranges include 0 V to +5 V, 0 V to +10 V, ±5 V, and ±10 V.
- What is the purpose of the segmented architecture in the AD7846KP-REEL?
The segmented architecture ensures 16-bit monotonicity and excellent integral linearity.
- What is the function of the LDAC line in the AD7846KP-REEL?
The LDAC line allows for simultaneous updating of DACs in multi-DAC systems.
- How does the CLR line function in the AD7846KP-REEL?
The CLR line resets the contents of the DAC latch to 00…000 or 10…000 depending on the state of R/W.
- What are the packaging options available for the AD7846KP-REEL?
The AD7846KP-REEL is available in 28-lead plastic, ceramic, and PLCC packages.
- What is the significance of the readback function in the AD7846KP-REEL?
The readback function is useful in Automated Test Equipment (ATE) applications, allowing the contents of the DAC register to be read back.
- What are the typical values for output resistance and short circuit current of the AD7846KP-REEL?
The output resistance is typically 0.3 Ω, and the short circuit current is typically ±25 mA.
- What are the voltage ranges for VDD, VSS, and VCC in the AD7846KP-REEL?
VDD: +11.4/+15.75 V, VSS: −14.25 V to −15.75 V, VCC: +4.75 V to +5.25 V.
- In which applications is the AD7846KP-REEL particularly useful?
The AD7846KP-REEL is particularly useful in closed-loop systems, ATE applications, multi-DAC systems, industrial control systems, and medical devices.
