Datasheet MCP4801, MCP4811, MCP4821 (Microchip)

MCP4801/4811/4821 8/10/12-Bit Voltage Output Digital-to-Analog Converter with Internal VREF and SPI Interface Features Description
• MCP4801: 8-Bit Voltage Output DAC The MCP4801/4811/4821 devices are single channel • MCP4811: 10-Bit Voltage Output DAC 8-bit, 10-bit and 12-bit buffered voltage output • MCP4821: 12-Bit Voltage Output DAC Digital-to-Analog Converters (DACs), respectively. The 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 (VREF = 2.048V). The user can configure the with LDAC Pin full-scale range of the device to be 2.048V or 4.096V by • Fast Settling Time of 4.5 µs 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 • 2.048V Internal Voltage Reference mode by setting a Configuration register bit or using the • 50 ppm/°C V SHDN pin. In Shutdown mode, most of the internal REF Temperature Coefficient circuits, including the output amplifier, are turned off for • 2.7V to 5.5V Single-Supply Operation power savings, while the amplifier output (VOUT) stage is • Extended Temperature Range: -40°C to +125°C configured to present a known high resistance output load (500 k typical.
Applications
The devices include double-buffered registers, • Set Point or Offset Trimming allowing a synchronous update of the DAC output 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. These devices are specified over the extended
Related Products(1)
temperature range (+125°C).
Voltage
The devices provide high accuracy and low noise
DAC No. of P/N Reference
performance for consumer and industrial applications
Resolution Channel (VREF)
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 MCP4802 8 2 (2.048V) 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 1 Document Outline 1.0 Electrical Characteristics FIGURE 1-1: SPI Input Timing Data. 2.0 Typical Performance Curves FIGURE 2-1: DNL vs. Code (MCP4821). FIGURE 2-2: DNL vs. Code and Temperature (MCP4821). FIGURE 2-3: Absolute DNL vs. Temperature (MCP4821). FIGURE 2-4: INL vs. Code and Temperature (MCP4821). FIGURE 2-5: Absolute INL vs. Temperature (MCP4821). FIGURE 2-6: INL vs. Code (MCP4821). FIGURE 2-7: DNL vs. Code and Temperature (MCP4811). FIGURE 2-8: INL vs. Code and Temperature (MCP4811). FIGURE 2-9: DNL vs. Code and Temperature (MCP4801). FIGURE 2-10: INL vs. Code and Temperature (MCP4801). FIGURE 2-11: Full-Scale VOUT vs. Ambient Temperature and VDD. Gain = 1x. FIGURE 2-12: Full-Scale VOUT vs. Ambient Temperature and VDD. Gain = 2x. FIGURE 2-13: Output Noise Voltage Density (VREF Noise Density) vs. Frequency. Gain = 1x. FIGURE 2-14: Output Noise Voltage (VREF Noise Voltage) vs. Bandwidth. Gain = 2x. FIGURE 2-15: IDD vs. Temperature and VDD. FIGURE 2-16: IDD Histogram (VDD = 2.7V). FIGURE 2-17: IDD Histogram (VDD = 5.0V). FIGURE 2-18: Hardware Shutdown Current vs. Temperature and VDD. FIGURE 2-19: Software Shutdown Current vs. Temperature and VDD. FIGURE 2-20: Offset Error vs. Temperature and VDD. FIGURE 2-21: Gain Error vs. Temperature and VDD. FIGURE 2-22: VIN High Threshold vs. Temperature and VDD. FIGURE 2-23: VIN Low Threshold vs. Temperature and VDD. FIGURE 2-24: Input Hysteresis vs. Temperature and VDD. FIGURE 2-25: VOUT High Limit vs.Temperature and VDD. FIGURE 2-26: VOUT Low Limit vs. Temperature and VDD. FIGURE 2-27: IOUT High Short vs. Temperature and VDD. FIGURE 2-28: IOUT vs. VOUT. Gain = 2x. FIGURE 2-29: VOUT Rise Time. FIGURE 2-30: VOUT Fall Time. FIGURE 2-31: VOUT Rise Time. FIGURE 2-32: VOUT Rise Time. FIGURE 2-33: VOUT Rise Time Exit Shutdown. FIGURE 2-34: PSRR vs. Frequency. 3.0 Pin descriptions TABLE 3-1: Pin Function Table for MCP4801/4811/4821 3.1 Supply Voltage Pins (VDD, VSS) 3.2 Chip Select (CS) 3.3 Serial Clock Input (SCK) 3.4 Serial Data Input (SDI) 3.5 Latch DAC Input (LDAC) 3.6 Analog Output (VOUT) 3.7 Exposed Thermal Pad (EP) 4.0 General Overview TABLE 4-1: LSb of each device FIGURE 4-1: Example for INL Error. FIGURE 4-2: Example for DNL Error. 4.1 Circuit Descriptions FIGURE 4-3: Typical Transient Response. FIGURE 4-4: Output Stage for Shutdown Mode. 5.0 Serial Interface 5.1 Overview 5.2 Write Command FIGURE 5-1: Write Command for MCP4821 (12-bit DAC). FIGURE 5-2: Write Command for MCP4811 (10-bit DAC). FIGURE 5-3: Write Command for MCP4801 (8-bit DAC). 6.0 Typical Applications 6.1 Digital Interface 6.2 Power Supply Considerations 6.3 Output Noise Considerations FIGURE 6-1: Typical Connection Diagram. 6.4 Layout Considerations 6.5 Single-Supply Operation 6.6 Bipolar Operation 6.7 Selectable Gain and Offset Bipolar Voltage Output 6.8 Designing a Double-Precision DAC 6.9 Building Programmable Current Source 7.0 Development support 7.1 Evaluation & Demonstration Boards 8.0 Packaging Information 8.1 Package Marking Information Corporate Office Atlanta Boston Chicago Cleveland Fax: 216-447-0643 Dallas Detroit Kokomo Toronto Fax: 852-2401-3431 Australia - Sydney China - Beijing China - Shanghai India - Bangalore Korea - Daegu Korea - Seoul Singapore Taiwan - Taipei Fax: 43-7242-2244-393 Denmark - Copenhagen France - Paris Germany - Munich Italy - Milan Spain - Madrid UK - Wokingham Worldwide Sales and Service