MCP4921 Digital-to-Analog Converters (DACs)
A Single Channel, Buffered Voltage Output Digital-to-Analog Converter with High Accuracy and Low Noise Performance
The MCP4921 devices are single channel 8-bit, 10-bit and 12-bit buffered voltage output Digital-to-Analog Converters (DACs), respectively. The devices operate from a single 2.7V to 5.5V supply with an SPI compatible Serial Peripheral Interface. The user can configure the full-scale range of the device to be VREF or 2*VREF by setting the gain selection option bit (gain of 1 of 2).
The user can shut down the device by setting the Configuration Register bit. In Shutdown mode, most of the internal circuits are turned off for power savings, and the output amplifier is configured to present a known high resistance output load (500 k? typical). The devices include double-buffered registers, allowing synchronous updates of the DAC output using the LDAC pin. These devices also incorporate a Power-on Reset (POR) circuit to ensure reliable powerup.
The devices provide high accuracy and low noise performance for consumer and industrial applications where calibration or compensation of signals (such as temperature, pressure and humidity) are required. The MCP4921 devices is available in the PDIP, SOIC, MSOP and DFN packages.
Features
- MCP4921: 12-Bit Voltage Output DAC
- Rail-to-Rail Output
- SPI Interface with 20 MHz Clock Support
- Simultaneous Latching of the DAC Output with LDAC Pin
- Fast Settling Time of 4.5 µs
- Selectable Unity or 2x Gain Output
- 2.7V to 5.5V Single-Supply Operation
- Extended Temperature Range: -40°C to +125°C
Specifications
- Parameters Specification VDD: 6.5V
- All Inputs and Outputs w.r.t. VSS: VSS –0.3V to VDD+0.3V
- Storage Temperature: -65°C to +150°C
- Ambient temperature with power applied: –55°C to +125°C
- Soldering temperature of leads (10 seconds): +300°C
- ESD Protection On All Pins (HBM): ? 4 Kv(HBM), ?400V (MM)
- Maximum Junction Temperature (TJ): +150°C
- Current at Input Pins: ±2 mA
- Current at Supply Pins: ±50 mA
- Current at Output Pins: ±25 mA