MCP4812-E/SN

MCP4802/4812/4822 8/10/12-Bit Dual Voltage Output Digital-to-Analog Converter with Internal VREF and SPI Interface Features Description • • • • • • The MCP4802/4812/4822 devices are dual 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 SPI compatible Serial Peripheral Interface. The devices have a high precision internal voltage reference (VREF = 2.048V). The user can configure the full-scale range of the device to be 2.048V or 4.096V by setting the Gain Selection Option bit (gain of 1 of 2). Each DAC channel can be operated in Active or Shutdown mode individually by setting the Configuration register bits. In Shutdown mode, most of the internal circuits in the shutdown channel 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 two DAC outputs using the LDAC pin. These devices also incorporate a Power-on Reset (POR) circuit to ensure reliable powerup. The devices utilize a resistive string architecture, with its inherent advantages of low DNL error, low ratio metric temperature coefficient 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 MCP4802/4812/4822 devices are available in the PDIP, SOIC and MSOP packages. Applications • • • • • Set Point or Offset Trimming Sensor Calibration Precision Selectable Voltage Reference Portable Instrumentation (Battery-Powered) Calibration of Optical Communication Devices Related Products(1) P/N DAC Resolution No. of Channels MCP4801 8 1 Voltage Reference (VREF) MCP4811 10 1 MCP4821 12 1 MCP4802 8 2 MCP4812 10 2 MCP4822 12 2 MCP4901 8 1 CS 2 MCP4911 10 1 SCK 3 MCP4921 12 1 MCP4902 8 2 MCP4912 10 2 MCP4922 12 2 Internal (2.048V) Package Types 8-Pin PDIP, SOIC, MSOP VDD 1 External SDI 4 MCP48X2 • • • • • • MCP4802: Dual 8-Bit Voltage Output DAC MCP4812: Dual 10-Bit Voltage Output DAC MCP4822: Dual 12-Bit Voltage Output DAC Rail-to-Rail Output SPI Interface with 20 MHz Clock Support Simultaneous Latching of the Dual DACs with LDAC pin Fast Settling Time of 4.5 µs Selectable Unity or 2x Gain Output 2.048V Internal Voltage Reference 50 ppm/°C VREF Temperature Coefficient 2.7V to 5.5V Single-Supply Operation Extended Temperature Range: -40°C to +125°C 8 VOUTA 7 VSS 6 VOUTB 5 LDAC MCP4802: 8-bit dual DAC MCP4812: 10-bit dual DAC MCP4822: 12-bit dual DAC Note 1: The products listed here have similar AC/DC performances.  2010-2015 Microchip Technology Inc. DS20002249B-page 1 MCP4802/4812/4822 Block Diagram CS SDI SCK LDAC Power-on Reset Interface Logic VDD VSS Input Input Register A Register B 2.048V VREF DACA Register DACB Register String DACA String DACB Gain Logic Gain Logic Output Op Amps Output Logic VOUTA DS20002249B-page 2 VOUTB  2010-2015 Microchip Technology Inc. MCP4802/4812/4822 1.0 ELECTRICAL CHARACTERISTICS † Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. Absolute Maximum Ratings † VDD....................................................................... 6.5V All inputs and outputs .......... VSS – 0.3V to VDD + 0.3V Current at Input Pins ......................................... ±2 mA Current at Supply Pins .................................... ±50 mA Current at Output Pins .................................... ±25 mA Storage temperature .......................... -65°C to +150°C Ambient temp. with power applied ..... -55°C to +125°C ESD protection on all pins 4 kV (HBM), 400V (MM) Maximum Junction Temperature (TJ)................+150°C ELECTRICAL CHARACTERISTICS Electrical Specifications: Unless otherwise indicated, VDD = 5V, VSS = 0V, VREF = 2.048V, Output Buffer Gain (G) = 2x, RL = 5 k to GND, CL = 100 pF, TA = -40 to +85°C. Typical values are at +25°C. Parameters Sym Min Typ Max Units Input Voltage VDD 2.7 — 5.5 V Input Current IDD — 415 750 µA Software Shutdown Current ISHDN_SW — 3.3 6 µA Power-on Reset Threshold VPOR — 2.0 — V Conditions Power Requirements All digital inputs are grounded, all analog outputs (VOUT) are unloaded. Code = 0x000h DC Accuracy MCP4802 Resolution n 8 — — Bits INL Error INL -1 ±0.125 1 LSb DNL DNL -0.5 ±0.1 +0.5 LSb Note 1 MCP4812 Resolution n 10 — — Bits INL Error INL -3.5 ±0.5 3.5 LSb DNL DNL -0.5 ±0.1 +0.5 LSb Note 1 MCP4822 Resolution n 12 — — Bits INL Error INL -12 ±2 12 LSb DNL DNL -0.75 ±0.2 +0.75 VOS -1 ±0.02 1 Offset Error Offset Error Temperature Coefficient Gain Error Gain Error Temperature Coefficient Note 1: 2: VOS/°C LSb Note 1 % of FSR Code = 0x000h — 0.16 — ppm/°C -45°C to +25°C — -0.44 — ppm/°C +25°C to +85°C gE -2 -0.10 2 G/°C — -3 — % of FSR Code = 0xFFFh, not including offset error ppm/°C Guaranteed monotonic by design over all codes. This parameter is ensured by design, and not 100% tested.  2010-2015 Microchip Technology Inc. DS20002249B-page 3 MCP4802/4812/4822 ELECTRICAL CHARACTERISTICS (CONTINUED) Electrical Specifications: Unless otherwise indicated, VDD = 5V, VSS = 0V, VREF = 2.048V, Output Buffer Gain (G) = 2x, RL = 5 k to GND, CL = 100 pF, TA = -40 to +85°C. Typical values are at +25°C. Parameters Sym Min Typ Max Units Conditions VREF 2.008 2.048 2.088 V VREF/°C — 125 325 ppm/°C -40°C to 0°C — 0.25 0.65 LSb/°C -40°C to 0°C — 45 160 ppm/°C 0°C to +85°C 0°C to +85°C Internal Voltage Reference (VREF) Internal Reference Voltage Temperature Coefficient (Note 2) VOUTA when G = 1x and Code = 0xFFFh — 0.09 0.32 LSb/°C Output Noise (VREF Noise) ENREF (0.110 Hz) — 290 — µVp-p Code = 0xFFFh, G = 1x Output Noise Density eNREF (1 kHz) — 1.2 — µV/Hz Code = 0xFFFh, G = 1x eNREF (10 kHz) — 1.0 — µV/Hz Code = 0xFFFh, G = 1x fCORNER — 400 — Hz Output Swing VOUT — 0.01 to VDD – 0.04 — V Phase Margin PM — 66 — Degree (°) Slew Rate SR — 0.55 — V/µs ISC — 15 24 mA tSETTLING — 4.5 — µs DAC-to-DAC Crosstalk —