MCP4902/4912/4922 Data Sheet - Microchip Technology

1 2010 Microchip Technology 1 mcp4902 /4912/ 4922 Features mcp4902 : Dual 8-Bit Voltage Output DAC MCP4912: Dual 10-Bit Voltage Output DAC MCP4922: 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 s Selectable Unity or 2x Gain Output External Voltage Reference Inputs External Multiplier Mode to Single-Supply Operation Extended Temperature Range: -40 C to +125 CApplications Set Point or Offset Trimming Precision Selectable Voltage Reference Motor Control Feedback Loop Digitally-Controlled Multiplier/Divider Calibration of Optical Communication DevicesRelated Products(1)DescriptionThe mcp4902 /4912/ 4922 devices are dual 8-bit,10-bit, and 12-bit buffered voltage outputDigital-to-Analog Converters (DACs), respectively.

2 Thedevices operate from a single to supply withSPI compatible Serial Peripheral Interface. The usercan configure the full-scale range of the device to beVREF or 2 * VREF by setting the Gain Selection Optionbit (gain of 1 of 2).The user can shut down both DAC channels by usingSHDN pin or shut down the DAC channel individuallyby setting the Configuration register bits. In Shutdownmode, most of the internal circuits in the shutdownchannel are turned off for power savings and the outputamplifier is configured to present a known highresistance output load (500 k typical . The devices include double-buffered registers,allowing synchronous updates of two DAC outputs,using the LDAC pin.)

3 These devices also incorporate aPower-on Reset (POR) circuit to ensure reliable devices utilize a resistive string architecture, withits inherent advantages of low DNL error and fastsettling time. These devices are specified over theextended temperature range (+125 C).The devices provide high accuracy and low noiseperformance for consumer and industrial applicationswhere calibration or compensation of signals (such astemperature, pressure and humidity) are required. The mcp4902 /4912/ 4922 devices are available in thePDIP, SOIC and TSSOP packages. Package TypesP/NDAC ResolutionNo. of ChannelSVolta ge Reference(VREF)MCP480181 Internal( )MCP4811101 MCP4821121 MCP480282 MCP4812102 MCP4822122 MCP490181 ExternalMCP4911101 MCP4921121 MCP490282 MCP4912102 MCP4922122 Note 1:The products listed here have similar AC/DC performances.

4 mcp4902 : 8-bit dual DACMCP4912: 10-bit dual DACMCP4922: 12-bit dual DAC141234131211109856714-Pin PDIP, SOIC, TSSOPVDDNCCSSCKVREFBNCNCSDILDACSHDNVOUTB VOUTAVREFAVSSMCP49X28/10/12-Bit Dual Voltage Output Digital-to-Analog Converter with SPI InterfaceMCP4902/4912/4922DS22250A-page 2 2010 Microchip Technology DiagramOp AmpsVDDVSSCSSDISCKI nterface LogicInput Register ARegister BInput DACA RegisterRegisterDACB StringDACBS tringDACA Power-on ResetVOUTAVOUTBLDACO utputGainLogicGainLogicOutputLogicSHDNVR EF AVREF BBufferBuffer 2010 Microchip Technology 3 mcp4902 /4912 CHARACTERISTICSA bsolute Maximum Ratings inputs and outputs .. VSS to VDD+ Current at Input Pins.

5 2 mACurrent at Supply Pins .. 50 mACurrent at Output Pins .. 25 mAStorage temperature .. -65 C to +150 CAmbient temp. with power applied .. -55 C to +125 CESD protection on all pins 4 kV (HBM), 400V (MM)Maximum Junction Temperature (TJ)..+150 C Notice: Stresses above those listed under MaximumRatings may cause permanent damage to the is a stress rating only and functional operation ofthe device at those or any other conditions above thoseindicated in the operational listings of this specificationis not implied. Exposure to maximum rating conditionsfor extended periods may affect device CHARACTERISTICSE lectrical Specifications: Unless otherwise indicated, VDD = 5V, VSS = 0V, VREF = , Output Buffer Gain (G) = 2x, RL = 5 k to GND, CL = 100 pF TA = -40 to +85 C.

6 Typical values are at +25 RequirementsOperating CurrentInput Cur-rent IDD 350700 AVDD = 5 VVDD = 3 VVREF input is unbuffered, all digital inputs are grounded, all analog outputs (VOUT) are unloaded. Code = 000h. 250500 AHardware Shutdown CurrentISHDN APower-on Reset circuit is turned offSoftware Shutdown CurrentISHDN_SW APower-on Reset circuit stays onPower-on-Reset ThresholdVPOR VDC AccuracyMCP4902 Resolutionn8 Bits INL ErrorINL-1 DNL + 1 MCP4912 Resolutionn10 Bits INL + 1 MCP4922 Resolutionn12 Bits INL ErrorINL-12 212 LSb + 1 Offset ErrorVOS of FSRCode = 0x000hNote 1:Guaranteed monotonic by design over all.

7 This parameter is ensured by design, and not 100% 4 2010 Microchip Technology Error TemperatureCoefficientVOS/ C ppm/ C -45 C to 25 C ppm/ C +25 C to 85 CGain Error gE of FSRCode = 0xFFFh, not including off-set errorGain Error Temperature Coefficient G/ C -3 ppm/ CInput Amplifier (VREF Input)Input Range Buffered VDD 2 Code = 2048 VREF = p-p, f = 100 Hz and 1kHzInput Range Unbuffered ModeVREF0 VDDVI nput ImpedanceRVREF 165 k Unbuffered ModeInput Capacitance Unbuffered ModeCVREF 7 pFMultiplier Mode -3 dB BandwidthfVREF 450 kHzVREF = , Unbuffered, G = 1xfVREF 400 kHzVREF = Vp-p, Unbuffered, G = 2xMultiplier Mode Total Harmonic DistortionTHDVREF -73 dBVREF = ,Frequency = 1 kHzOutput AmplifierOutput SwingVOUT to VDD VAccuracy is better than 1 LSb for VOUT = 10 mV to (VDD 40 mV)

8 Phase Margin m 66 degreesSlew RateSR V/ sShort Circuit CurrentISC 1524 mASettling Timetsettling sWithin 1/2 LSb of final value from 1/4 to 3/4 full-scale rangeDynamic Performance (Note 2)DAC-to-DAC Crosstalk 10 nV-sMajor Code Transition Glitch 45 nV-s1 LSb change around major carry ( to )Digital Feedthrough 10 nV-sAnalog Crosstalk 10 nV-sELECTRICAL CHARACTERISTICS (CONTINUED)Electrical Specifications: Unless otherwise indicated, VDD = 5V, VSS = 0V, VREF = , Output Buffer Gain (G) = 2x, RL = 5 k to GND, CL = 100 pF TA = -40 to +85 C. Typical values are at +25 1:Guaranteed monotonic by design over all :This parameter is ensured by design, and not 100% tested.

9 2010 Microchip Technology 5 mcp4902 /4912/ 4922 ELECTRICAL CHARACTERISTIC WITH EXTENDED TEMPERATUREE lectrical Specifications: Unless otherwise indicated, VDD = 5V, VSS = 0V, VREF = , Output Buffer Gain (G) = 2x, RL = 5 k to GND, CL = 100 pF. Typical values are at +125 C by characterization or RequirementsOperating CurrentIDD 400 AVREF input is unbuffered, all digi-tal inputs are grounded, all analog outputs (VOUT) are unloaded. Code=000hHardware Shutdown CurrentISHDN APOR circuit is turned-offSoftware Shutdown Current ISHDN_SW 5 APOR circuit stays turned-onPower-On Reset thresholdVPOR VDC AccuracyMCP4902 Resolutionn8 Bits INL ErrorINL DNL DNL 1 MCP4912 Resolutionn10 Bits INL ErrorINL 1 LSb DNLDNL 1 MCP4922 Resolutionn12 Bits INL ErrorINL 4 LSb DNLDNL 1 Offset ErrorVOS % of FSRCode 0x000hOffset Error TemperatureCoefficientVOS/ C -5 ppm/ C+25 C to +125 CGain Error gE % of FSRCode = 0xFFFh.

10 Not including off-set errorGain Error Temperature Coefficient G/ C -3 ppm/ CInput Amplifier (VREF Input)Input Range Buffered ModeVREF to VDD VNote 1 Code = 2048, VREF = p-p, f = 100 Hz and 1kHzInput Range Unbuffered ModeVREF0 VDDVI nput ImpedanceRVREF 174 k Unbuffered modeInput Capacitance Unbuffered ModeCVREF 7 pFNote 1:Guaranteed monotonic by design over all :This parameter is ensured by design, and not 100% 6 2010 Microchip Technology Mode -3 dB BandwidthfVREF 450 kHzVREF = Vp-p, Unbuffered, G = 1xfVREF 400 kHzVREF = Vp-p, Unbuffered, G = 2xMultiplying Mode Total Harmonic DistortionTHDVREF dBVREF = , Frequency = 1 kHzOutput AmplifierOutput SwingVOUT to VDD VAccuracy is better than 1 LSb for VOUT = 10 mV to (VDD 40 mV)Phase Margin m 66 degreesSlew RateSR V/ sShort Circuit CurrentISC 17 mASettling Timetsettling sWithin 1/2 LSb of final value from 1/4 to 3/4 full-scale rangeDynamic Performance (Note 2)