Overview
The AD5312ARM, produced by Analog Devices Inc., is a dual 10-bit buffered voltage output Digital-to-Analog Converter (DAC) packaged in a 10-lead MSOP. This device operates from a single power supply ranging from 2.5 V to 5.5 V and consumes a low current of 230 µA at 3 V, making it suitable for battery-powered and low-power applications.
The AD5312ARM features on-chip rail-to-rail output buffer amplifiers, allowing the outputs to swing from 0 V to VREF. It also includes a power-on reset function that ensures the DAC outputs power up to 0 V and remain there until a valid write sequence is executed.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Resolution | 10 bits | ||||
| Relative Accuracy (A Version) | ±4 LSB | ||||
| Relative Accuracy (B Version) | ±2 LSB | ||||
| Differential Nonlinearity (A Version) | ±0.5 LSB | ||||
| Differential Nonlinearity (B Version) | ±0.05 LSB | ||||
| Offset Error | ±0.4 % of FSR | See Figure 3 and Figure 4 | |||
| Gain Error | ±0.15 % of FSR | VREF = VDD and offset plus gain error must be positive. | |||
| Output Voltage Settling Time | 7 μs | 9 μs | μs | ¼ Scale to ¾ Scale Change (0 × 100 to 0 × C300) | |
| Slew Rate | 0.7 V/μs | V/μs | Major-Code Transition | ||
| Power Supply Range | 2.5 V | 5.5 V | V | ||
| Current Consumption @ 5 V | 300 µA | µA | Including reference current | ||
| Power-Down Current @ 5 V | 200 nA | nA | |||
Key Features
- Dual 10-bit buffered voltage output DACs in a single package.
- Operates from a single 2.5 V to 5.5 V power supply.
- Micropower operation: 230 µA at 3 V, 300 µA at 5 V (including reference current).
- Power-down to 200 nA at 5 V, 50 nA at 3 V.
- On-chip rail-to-rail output buffer amplifiers with a slew rate of 0.7 V/μs.
- Guaranteed monotonic by design over all codes.
- Buffered/Unbuffered reference input options.
- Power-on-reset to 0 V.
- Simultaneous update of DAC outputs via LDAC.
- Low power serial interface with Schmitt-triggered inputs, compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.
Applications
- Portable battery-powered instruments.
- Digital gain and offset adjustment.
- Programmable voltage and current sources.
- Programmable attenuators.
- Automotive applications.
Q & A
- What is the resolution of the AD5312ARM DAC?
The AD5312ARM has a resolution of 10 bits.
- What is the power supply range for the AD5312ARM?
The AD5312ARM operates from a single 2.5 V to 5.5 V power supply.
- What is the current consumption of the AD5312ARM at 5 V?
The current consumption is 300 µA at 5 V, including reference current.
- How does the power-down feature work on the AD5312ARM?
The power-down feature reduces the current consumption to 200 nA at 5 V and 50 nA at 3 V.
- What is the slew rate of the output amplifiers in the AD5312ARM?
The slew rate of the output amplifiers is 0.7 V/μs.
- Is the AD5312ARM guaranteed to be monotonic?
Yes, the AD5312ARM is guaranteed monotonic by design over all codes.
- What interface standards is the AD5312ARM compatible with?
The AD5312ARM is compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.
- How are the DAC outputs updated in the AD5312ARM?
The DAC outputs can be updated simultaneously using the asynchronous LDAC input.
- What is the power-on reset state of the AD5312ARM?
The power-on reset state sets the DAC outputs to 0 V and keeps them there until a valid write sequence is executed.
- What are some typical applications of the AD5312ARM?
Typical applications include portable battery-powered instruments, digital gain and offset adjustment, programmable voltage and current sources, and programmable attenuators.
