MCP4821-E/P Microchip

MCP4801/4811/4821 8/10/12-Bit Voltage Output Digital-to-Analog Converter with Internal V and SPI Interface REF Features Description MCP4801: 8-Bit Voltage Output DAC The MCP4801/4811/4821 devices are single channel 8-bit, 10-bit and 12-bit buffered voltage output MCP4811: 10-Bit Voltage Output DAC Digital-to-Analog Converters (DACs), respectively. The MCP4821: 12-Bit Voltage Output DAC devices operate from a single 2.7V to 5.5V supply with Rail-to-Rail Output an SPI compatible Serial Peripheral Interface. SPI Interface with 20 MHz Clock Support The devices have a high precision internal voltage Simultaneous Latching of the DAC Output reference (V = 2.048V). The user can configure the REF with LDAC Pin full-scale range of the device to be 2.048V or 4.096V by Fast Settling Time of 4.5 s setting the Gain Selection Option bit (gain of 1 of 2). Selectable Unity or 2x Gain Output The devices can be operated in Active or Shutdown mode by setting a Configuration register bit or using the 2.048V Internal Voltage Reference SHDN pin. In Shutdown mode, most of the internal 50 ppm/C V Temperature Coefficient REF circuits, including the output amplifier, are turned off for 2.7V to 5.5V Single-Supply Operation power savings, while the amplifier output (V ) stage is OUT Extended Temperature Range: -40C to +125C configured to present a known high resistance output load (500 k typical . Applications The devices include double-buffered registers, allowing a synchronous update of the DAC output Set Point or Offset Trimming using the LDAC pin. These devices also incorporate a Sensor Calibration Power-on Reset (POR) circuit to ensure reliable power- Precision Selectable Voltage Reference up. Portable Instrumentation (Battery-Powered) The devices utilize a resistive string architecture, with Calibration of Optical Communication Devices its inherent advantages of low DNL error, low ratio metric temperature coefficient and fast settling time. (1) These devices are specified over the extended Related Products temperature range (+125C). Voltage The devices provide high accuracy and low noise DAC No. of P/N Reference performance for consumer and industrial applications Resolution Channel (V ) REF where calibration or compensation of signals (such as temperature, pressure and humidity) are required. MCP4801 8 1 The MCP4801/4811/4821 devices are available in the MCP4811 10 1 PDIP, SOIC, MSOP and DFN packages. MCP4821 12 1 Internal (2.048V) MCP4802 8 2 MCP4812 10 2 MCP4822 12 2 MCP4901 8 1 MCP4911 10 1 MCP4921 12 1 External MCP4902 8 2 MCP4912 10 2 MCP4922 12 2 Note 1: The products listed here have similar AC/DC performances. 2010 Microchip Technology Inc. DS22244B-page 1MCP4801/4811/4821 Package Types PDIP, SOIC, MSOP DFN (2x3)* V V V 1 8 1 8 V DD OUT DD OUT 2 7 V CS V CS 2 7 SS SS 9 SHDN 3 6 SHDN SCK SCK 3 6 SDI 4 5 LDAC 4 5 LDAC SDI MCP4801: 8-bit single DAC MCP4811: 10-bit single DAC MCP4821: 12-bit single DAC * Includes Exposed Thermal Pad (EP) see Table 3-1. Block Diagram LDAC CS SDI SCK Interface Logic V Power-on DD Reset Input Register V SS DAC V REF Register (2.048V) String DAC Gain Output Logic Op Amp Output Logic V SHDN OUT DS22244B-page 2 2010 Microchip Technology Inc. MCP48X1