Overview
The AD5322BRM from Analog Devices Inc. is a dual 12-bit buffered voltage output Digital-to-Analog Converter (DAC) packaged in a 10-lead MSOP. This device operates from a single 2.5 V to 5.5 V supply, consuming a low power of 230 μA at 3 V. It features on-chip rail-to-rail output buffer amplifiers, allowing the outputs to swing rail-to-rail with a slew rate of 0.7 V/μs. The AD5322BRM is designed for low power consumption and high accuracy, making it suitable for various applications including portable battery-powered instruments, digital gain and offset adjustment, and programmable voltage and current sources.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Conditions/Comments |
|---|---|---|---|---|---|
| Resolution | 12 | 12 | 12 | Bits | |
| Relative Accuracy (A Version) | ±2 | ±16 | LSB | ||
| Relative Accuracy (B Version) | ±2 | ±8 | LSB | ||
| Differential Nonlinearity (A Version) | ±0.2 | ±1 | LSB | ||
| Differential Nonlinearity (B Version) | ±0.2 | ±1 | LSB | ||
| Offset Error | ±0.4 | ±3 | % of FSR | VREF = VDD and offset plus gain error must be positive | |
| Gain Error | ±0.15 | ±1 | % of FSR | ||
| Output Voltage Settling Time | 8 | 10 | μs | ¼ Scale to ¾ Scale Change (0x400 to 0xC00) | |
| Slew Rate | 0.7 | V/μs | Major-Code Transition | ||
| Power Supply Range | 2.5 | 5.5 | V | ||
| Operating Temperature Range | −40 | +105 | °C | Industrial (A, B Version) |
Key Features
- Dual 12-bit buffered voltage output DACs in a single package
- Low power consumption: 230 μA at 3 V, power-down to 200 nA @ 5 V, 50 nA @ 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™
- Three programmable power-down modes
- Qualified for automotive applications
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 AD5322BRM DAC?
The AD5322BRM has a resolution of 12 bits.
- What is the power supply range for the AD5322BRM?
The AD5322BRM operates from a single 2.5 V to 5.5 V supply.
- What is the typical current consumption of the AD5322BRM at 3 V?
The typical current consumption is 230 μA at 3 V.
- What is the slew rate of the output buffer amplifiers?
The slew rate is 0.7 V/μs.
- Does the AD5322BRM have power-down modes?
- What is the operating temperature range for the AD5322BRM?
The operating temperature range is −40°C to +105°C.
- Is the AD5322BRM qualified for automotive applications?
- What type of serial interface does the AD5322BRM use?
The AD5322BRM uses a low power serial interface compatible with SPI®, QSPI™, and MICROWIRE™.
- What is the output voltage settling time for the AD5322BRM?
The output voltage settling time is typically 10 μs for a ¼ scale to ¾ scale change.
- Does the AD5322BRM have a power-on-reset feature?
