Overview
The AD7846JP, 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 both unipolar and bipolar output configurations. The DAC can be set up to provide output ranges of 0 V to +5 V, 0 V to +10 V, or bipolar ranges of ±5 V and ±10 V. The segmented architecture ensures 16-bit monotonicity and excellent integral linearity due to the tight matching between the input offset voltages of the buffer amplifiers.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Number of Bits | 16 | - | - |
| Output Type | Voltage - Buffered | - | - |
| Reference Type | External | - | - |
| Voltage - Supply, Analog | ±11.4 V ~ 15.75 V | V | - |
| Voltage - Supply, Digital | 5 V | V | - |
| INL/DNL (LSB) | ±16 (Max), ±1 (Max) | LSB | - |
| Settling Time | 9 µs | µs | - |
| Operating Temperature | 0°C ~ 70°C | °C | - |
| Package | 28-LCC (J-Lead) | - | - |
| Power Dissipation | 100 mW (typical) | mW | VOUT unloaded |
Key Features
- 16-Bit Monotonicity: Guaranteed over temperature, making it ideal for closed-loop applications.
- Readback Capability: Allows reading back the DAC register contents, useful in Automated Test Equipment (ATE) applications.
- Microprocessor Interface: Comprehensive interface with 16 data I/O pins and control lines (CS, R/W, LDAC, and CLR) for writing to and reading from the I/O latch.
- Output Configuration: Can be configured for unipolar (0 V to +5 V, 0 V to +10 V) or bipolar (±5 V, ±10 V) output ranges.
- Low Power Consumption: Typical power dissipation of 100 mW.
- Segmented Architecture: Ensures 16-bit resolution with a 16-resistor string and a 12-bit DAC.
Applications
- Closed-Loop Systems: Ideal due to its guaranteed 16-bit monotonicity over temperature.
- Automated Test Equipment (ATE): The readback capability is particularly useful in ATE applications.
- Industrial Control Systems: Suitable for precise voltage output requirements in industrial settings.
- Medical Devices: Can be used in medical equipment requiring high precision and reliability.
- Aerospace and Defense: Applicable in various military and aerospace applications due to its robust specifications.
Q & A
- What is the resolution of the AD7846JP DAC?
The AD7846JP is a 16-bit DAC.
- What are the possible output voltage ranges for the AD7846JP?
The AD7846JP 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 settling time of the AD7846JP?
The settling time of the AD7846JP is 9 µs.
- Does the AD7846JP support readback functionality?
Yes, the AD7846JP supports readback capability, allowing the contents of the DAC register to be read back.
- What is the power dissipation of the AD7846JP?
The typical power dissipation of the AD7846JP is 100 mW.
- What are the operating temperature ranges for the AD7846JP?
The operating temperature range for the AD7846JP is 0°C to 70°C.
- What type of package is the AD7846JP available in?
The AD7846JP is available in 28-lead plastic, ceramic, and PLCC packages, specifically the 28-LCC (J-Lead) package.
- Is the AD7846JP suitable for industrial control systems?
Yes, the AD7846JP is suitable for industrial control systems due to its high precision and reliability.
- Can the AD7846JP be used in medical devices?
Yes, the AD7846JP can be used in medical devices requiring high precision and reliability.
- What is the architecture of the AD7846JP DAC?
The AD7846JP uses a segmented architecture with a 16-resistor string and a 12-bit DAC to ensure 16-bit resolution.
