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MCP4921 数据表(PDF) 1 Page - Microchip Technology |
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MCP4921 数据表(HTML) 1 Page - Microchip Technology |
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1 / 50 page  2010 Microchip Technology Inc. DS22248A-page 1 MCP4901/4911/4921 Features • MCP4901: 8-Bit Voltage Output DAC • MCP4911: 10-Bit Voltage Output DAC • 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 • External Voltage Reference Input • External Multiplier Mode • 2.7V to 5.5V Single-Supply Operation • Extended Temperature Range: -40°C to +125°C Applications • Set Point or Offset Trimming • Precision Selectable Voltage Reference • Motor Control Feedback Loop • Digitally-Controlled Multiplier/Divider • Calibration of Optical Communication Devices Related Products Description The MCP4901/4911/4921 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 Con- figuration 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 power- up. The devices utilize a resistive string architecture, with its inherent advantages of low Differential Non-Linear- ity (DNL) error and fast settling time. These devices are specified over the extended temperature range (+125°C). 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 MCP4901/4911/4921 devices are available in the PDIP, SOIC, MSOP and DFN packages. Package Types P/N DAC Resolution No. of Channels Voltage Reference (VREF) MCP4801 8 1 Internal (2.048V) MCP4811 10 1 MCP4821 12 1 MCP4802 8 2 MCP4812 10 2 MCP4822 12 2 MCP4901 8 1 External MCP4911 10 1 MCP4921 12 1 MCP4902 8 2 MCP4912 10 2 MCP4922 12 2 Note: The products listed here have similar AC/DC performances. DFN-8 (2x3)* 1 2 3 4 8 7 6 5 CS SCK SDI VDD VSS VOUT LDAC MCP4901: 8-bit single DAC MCP4911: 10-bit single DAC MCP4921: 12-bit single DAC 8-Pin PDIP, SOIC, MSOP 1 2 3 4 8 7 6 5 CS SCK SDI VDD VSS VOUT LDAC VREF VREF EP 9 * Includes Exposed Thermal Pad (EP); see Table 3-1. 8/10/12-Bit Voltage Output Digital-to-Analog Converter with SPI Interface |
类似零件编号 - MCP4921 |
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类似说明 - MCP4921 |
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