Overview
The AD7846JNZ is a 16-bit Digital-to-Analog Converter (DAC) manufactured 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 can be configured to provide unipolar output ranges (0 V to +5 V, 0 V to +10 V) or bipolar output ranges (±5 V, ±10 V). The device is known for its excellent accuracy and monotonicity, making it suitable for various precision applications.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 16 bits | ||
| Output Range | 0 V to +5 V, 0 V to +10 V (unipolar), ±5 V, ±10 V (bipolar) | ||
| Integral Linearity Error | ±2 LSBs | Over temperature | |
| Power Supplies | VDD: +11.4 V to +15.75 V, VSS: –11.4 V to –15.75 V, VCC: +4.75 V to +5.25 V | V | Nominal values: VDD = +15 V, VSS = –15 V, VCC = +5 V |
| Power Dissipation | 100 mW typ | mW | Unloaded VOUT |
| Output Resistance | 0.3 Ω typ | Ω | To 0 V |
| Short Circuit Current | ±25 mA typ | mA | To 0 V or any power supply |
| Temperature Range | J, K Versions: 0°C to +70°C; A, B Versions: –40°C to +85°C | °C |
Key Features
- 16-Bit Monotonicity: Ensures monotonicity over the entire temperature range, making it ideal for closed-loop applications.
- Microprocessor Interface: Includes 16 data I/O pins and control lines (CS, R/W, LDAC, and CLR) for comprehensive microprocessor compatibility and readback capability.
- Segmented Architecture: Uses a segmented architecture with a 16-resistor string and 12-bit DAC for high resolution and integral linearity.
- Low Power Consumption: Typical power dissipation of 100 mW.
- Configurable Output Ranges: Can be configured for unipolar (0 V to +5 V, 0 V to +10 V) or bipolar (±5 V, ±10 V) output ranges.
- Package Options: Available in 28-lead plastic, ceramic, and PLCC packages.
Applications
- Automated Test Equipment (ATE): The readback function is particularly useful in ATE applications.
- Closed-Loop Systems: Ideal for applications requiring high accuracy and monotonicity.
- Industrial Control Systems: Suitable for precision control in industrial environments.
- Medical Devices: Can be used in medical equipment requiring precise analog output.
- Aerospace and Military: Qualified for use in military and aerospace devices due to its robust specifications and reliability.
Q & A
- What is the resolution of the AD7846JNZ DAC?
The AD7846JNZ has a resolution of 16 bits.
- What are the configurable output ranges of the AD7846JNZ?
The AD7846JNZ 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 typical power dissipation of the AD7846JNZ?
The typical power dissipation is 100 mW.
- What is the temperature range for the J and K versions of the AD7846JNZ?
The temperature range for the J and K versions is 0°C to +70°C.
- Does the AD7846JNZ support microprocessor interface?
Yes, it includes 16 data I/O pins and control lines (CS, R/W, LDAC, and CLR) for comprehensive microprocessor compatibility and readback capability.
- What is the significance of the segmented architecture in the AD7846JNZ?
The segmented architecture ensures 16-bit monotonicity and excellent integral linearity by using a 16-resistor string and a 12-bit DAC.
- What are the package options available for the AD7846JNZ?
The AD7846JNZ is available in 28-lead plastic, ceramic, and PLCC packages.
- Is the AD7846JNZ suitable for use in ATE applications?
Yes, the readback function of the AD7846JNZ is particularly useful in Automated Test Equipment (ATE) applications.
- What is the output resistance of the AD7846JNZ?
The output resistance is typically 0.3 Ω.
- What is the short circuit current of the AD7846JNZ?
The short circuit current is typically ±25 mA.
