MCP48FXBX4/8 8/10/12-Bit Quad/Octal Voltage Output, 6 LSb INL Digital-to-Analog Converters with SPI Interface Features Package Types Operating Voltage Range: - 2.7V to 5.5V Full specifications - 1.8V to 2.7V Reduced device specifications Output Voltage Resolutions: CS 1 15 SDO MCP48FXBX4 - 8-bit: MCP48FXB0X (256 steps) V V REF0 2 14 REF1 20-Lead VQFN - 10-bit: MCP48FXB1X (1024 steps) V (1) V OUT0 3 13 OUT1 21 EP 5x5 mm Quad - 12-bit: MCP48FXB2X (4096 steps) V V OUT2 4 12 OUT3 Rail-to-Rail Output NC 5 11 NC Fast Settling Time of 7.8 s (Typical) DAC Voltage Reference Source Options: - Device V DD LAT1 1 20 LAT0/HVC -External V pin (buffered or unbuffered) REF V DD 2 19 SDI - Internal band gap (1.22V typical) CS 3 18 SCK MCP48FXBX4 Output Gain Options: V REF0 4 17 SDO 20-Lead TSSOP V OUT0 5 16 V -1x (unity) REF1 V OUT2 6 15 V Quad OUT1 - 2x (available when not using internal V as DD NC 7 14 V OUT3 voltage source) NC 8 13 NC Nonvolatile Memory (EEPROM) Option: V SS 9 12 NC - User-programmable Power-on Reset NC 10 11 NC (POR)/Brown-out Reset (BOR) output setting and device Configuration bits recall - Auto-recall of saved DAC register setting - Auto-recall of saved device configuration (voltage reference, gain, power-down) CS 1 15 SDO Power-on/Brown-out Reset Protection MCP48FXBX8 V REF0 2 14 V REF1 Power-Down Modes: V 20-Lead VQFN OUT0 (1) 3 13 V 21 EP OUT1 - Disconnects output buffer (high-impedance) V 5x5 mm Octal OUT2 4 12 V OUT3 - Selection of V pull-down resistors OUT V 5 11 V OUT4 OUT5 (125 k or 1 k ) Low-Power Consumption: - Normal operation: <2.6 mA (quad), 3.2 mA (octal) - Power-down operation: 680 nA typical LAT1 1 20 LAT0/HVC - EEPROM write cycle: 2.2 mA (quad), V DD 2 19 SDI 2.7 mA (octal) maximum CS 3 18 SCK MCP48FXBX8 V SPI Interface: REF0 4 17 SDO 20-Lead TSSOP V OUT0 5 16 V - Supports Mode 0,0 and Mode 1,1 REF1 V Octal OUT2 6 15 V OUT1 - Up to 20 MHz writes and 10 MHz reads V 7 14 V OUT4 OUT3 - Input buffers support interfacing to V OUT6 8 13 V OUT5 low-voltage digital devices V SS 9 12 V OUT7 Package Types: 20-Lead TSSOP, NC 10 11 NC 20-Lead 5 mm x 5 mm VQFN Note 1: Includes Exposed Thermal Pad (EP) see Extended Temperature Range: -40C to +125C Table 3-1 and Table 3-2. 2020 Microchip Technology Inc. DS20006362A-page 1 V V V NC OUT6 6 20 DD 6 20 DD V V SS 7 19 LAT1 SS 7 19 LAT1 NC 8 18 LAT0/HVC NC 8 18 LAT0/HVC NC 9 17 SDI NC 9 17 SDI V 10 16 SCK NC 10 16 SCK OUT7MCP48FXBX4/8 In the Internal Band Gap Voltage Reference mode, the General Description gain can be selected between 2 and 4. The MCP48FXBX4/8 devices are a family of buffered This family of devices features WiperLock voltage output Digital-to-Analog Converters (DAC), functionality, which prevents inadvertent changes of with the following options: the output value. It uses a high voltage on a specific Quad or octal output channel configurations pin, together with dedicated commands, to lock the 8/10/12-bit resolution values that are stored in memory. Volatile or nonvolatile user memory These devices have an SPI compatible serial interface. WRITE commands are supported up to 20 MHz, while The quad and octal options differ only by the number of READ commands are supported up to 10 MHz. output channels. The volatile and nonvolatile versions have an identical analog circuit structure. Applications There are three voltage reference sources: the external pin, the devices V or an internal band gap V REF DD Set Point or Offset Trimming voltage source. Sensor Calibration When the V mode is selected, it is internally con- DD Low-Power Portable Instrumentation nected to the DACs reference circuit. When the external PC Peripherals V pin is used, the user has the option to select REF Data Acquisition Systems between a gain of 1 and 2 if the Buffered mode is used, Motor Control or the internal buffer can be bypassed entirely in the External V Unbuffered mode. REF MCP48FXBX4/8 DAC Output Channel Block Diagram V DD VRnB:VRnA/PDnB:PDnA PDnB:PDnA V + REF PDnB:PDnA VRnB:VRnA Band Gap V GAIN OUT V DD PDnB:PDnA VRnB:VRnA LAT 1k 125 k DS20006362A-page 2 2020 Microchip Technology Inc. Resistor Ladder