Datasheet MCP4902, MCP4912, MCP4922 (Microchip)

MCP4902/4912/4922 8/10/12-Bit Dual Voltage Output Digital-to-Analog Converter with SPI Interface Features Description
• MCP4902: Dual 8-Bit Voltage Output DAC The MCP4902/4912/4922 devices are dual 8-bit, • MCP4912: Dual 10-Bit Voltage Output DAC 10-bit, and 12-bit buffered voltage output • MCP4922: Dual 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 SPI compatible Serial Peripheral Interface. The user • SPI Interface with 20 MHz Clock Support can configure the full-scale range of the device to be • Simultaneous Latching of the Dual DACs VREF or 2 * VREF by setting the Gain Selection Option with LDAC pin bit (gain of 1 of 2). • Fast Settling Time of 4.5 µs The user can shut down both DAC channels by using • Selectable Unity or 2x Gain Output SHDN pin or shut down the DAC channel individually • External Voltage Reference Inputs by setting the Configuration register bits. In Shutdown • External Multiplier Mode mode, most of the internal circuits in the shutdown channel are turned off for power savings and the output • 2.7V to 5.5V Single-Supply Operation amplifier is configured to present a known high • Extended Temperature Range: -40°C to +125°C resistance output load (500 ktypical.
Applications
The devices include double-buffered registers, • Set Point or Offset Trimming allowing synchronous updates of two DAC outputs, using the LDAC pin. These devices also incorporate a • Precision Selectable Voltage Reference Power-on Reset (POR) circuit to ensure reliable power- • Motor Control Feedback Loop up. • Digitally-Controlled Multiplier/Divider The devices utilize a resistive string architecture, with • Calibration of Optical Communication Devices its inherent advantages of low DNL error and fast settling time. These devices are specified over the
Related Products(1)
extended 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 ChannelS (V
where calibration or compensation of signals (such as
REF)
temperature, pressure and humidity) are required. MCP4801 8 1 The MCP4902/4912/4922 devices are available in the MCP4811 10 1 Internal PDIP, SOIC and TSSOP packages. MCP4821 12 1 (2.048V)
Package Types
MCP4802 8 2 MCP4812 10 2
14-Pin PDIP, SOIC, TSSOP
MCP4822 12 2 VDD 1 14 VOUTA MCP4901 8 1 NC 2 13 VREFA
2
MCP4911 10 1 CS 3 12 V
X
SS External MCP4921 12 1 SCK 4 11 VREFB
P49 MCP4902 8 2
SDI 5 10 VOUTB
MC MCP4912 10 2
NC 6 9 SHDN
MCP4922 12 2
NC 7 8 LDAC
Note 1:
The products listed here have similar AC/
MCP4902:
8-bit dual DAC DC performances.
MCP4912:
10-bit dual DAC
MCP4922:
12-bit dual DAC  2010 Microchip Technology Inc. DS22250A-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 (MCP4922). FIGURE 2-2: DNL vs. Code and Temperature (MCP4922). FIGURE 2-3: DNL vs. Code and VREF, Gain = 1 (MCP4922). FIGURE 2-4: Absolute DNL vs. Temperature (MCP4922). FIGURE 2-5: Absolute DNL vs. Voltage Reference (MCP4922). FIGURE 2-6: INL vs. Code and Temperature (MCP4922). FIGURE 2-7: Absolute INL vs. Temperature (MCP4922). FIGURE 2-8: Absolute INL vs. VREF (MCP4922). FIGURE 2-9: INL vs. Code and VREF (MCP4922). FIGURE 2-10: INL vs. Code (MCP4922). FIGURE 2-11: DNL vs. Code and Temperature (MCP4912). FIGURE 2-12: INL vs. Code and Temperature (MCP4912). FIGURE 2-13: DNL vs. Code and Temperature (MCP4902). FIGURE 2-14: INL vs. Code and Temperature (MCP4902). 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. Ambient Temperature and VDD. FIGURE 2-19: Software Shutdown Current vs. Ambient Temperature and VDD. FIGURE 2-20: Offset Error vs. Ambient Temperature and VDD. FIGURE 2-21: Gain Error vs. Ambient Temperature and VDD. FIGURE 2-22: VIN High Threshold vs Ambient Temperature and VDD. FIGURE 2-23: VIN Low Threshold vs Ambient Temperature and VDD. FIGURE 2-24: Input Hysteresis vs. Ambient Temperature and VDD. FIGURE 2-25: VREF Input Impedance vs. Ambient Temperature and VDD. FIGURE 2-26: VOUT High Limit vs. Ambient Temperature and VDD. FIGURE 2-27: VOUT Low Limit vs. Ambient Temperature and VDD. FIGURE 2-28: IOUT High Short vs. Ambient Temperature and VDD. FIGURE 2-29: IOUT vs VOUT. Gain = 1x. FIGURE 2-30: VOUT Rise Time. FIGURE 2-31: VOUT Fall Time. FIGURE 2-32: VOUT Rise Time. FIGURE 2-33: VOUT Rise Time. FIGURE 2-34: VOUT Rise Time Exit Shutdown. FIGURE 2-35: PSRR vs. Frequency. FIGURE 2-36: Multiplier Mode Bandwidth. FIGURE 2-37: -3 db Bandwidth vs. Worst Codes. FIGURE 2-38: Phase Shift. 3.0 Pin Descriptions TABLE 3-1: Pin Function Table 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 Hardware Shutdown Input (SHDN) 3.7 Analog Outputs (VOUTA, VOUTB) 3.8 Voltage Reference Inputs (VREFA, VREFB) 4.0 General Overview TABLE 4-1: LSb of each device 4.1 DC Accuracy FIGURE 4-1: Example for INL Error. FIGURE 4-2: Example for DNL Accuracy. 4.2 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 MCP4922 (12-bit DAC). FIGURE 5-2: Write Command for MCP4912 (10-bit DAC). FIGURE 5-3: Write Command for MCP4902 (8-bit DAC). 6.0 Typical Applications 6.1 Digital Interface 6.2 Power Supply Considerations FIGURE 6-1: Typical Connection Diagram. 6.3 Layout Considerations 6.4 Single-Supply Operation 6.5 Bipolar Operation 6.6 Selectable Gain and Offset Bipolar Voltage Output Using a Dual DAC 6.7 Designing a Double-Precision DAC Using a Dual DAC 6.8 Building Programmable Current Source 6.9 Using Multiplier Mode 7.0 Development support 7.1 Evaluation and Demonstration Boards 8.0 Packaging Information 8.1 Package Marking Information Trademarks Worldwide Sales and Service