MCP48CMB21 datasheet(2/106 Pages) MICROCHIP

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MCP48CXBXX

DS20006160A-page 2

 2019 Microchip Technology Inc.

General Description

The MCP48CXBXX are single and dual-channel 8-bit,

10-bit,

and

12-bit

buffered

voltage

output

Digital-to-Analog Converters (DAC), with volatile or

MTP memory and an SPI serial interface.

The MTP memory can be written by the user up to 32

times, for each specific register. It requires a

high-voltage level on the HVC pin, typically 7.5V, in

order to successfully program the desired memory

location. The nonvolatile memory includes power-up

output values, device configuration registers and

general purpose memory.

The VREF pin, the device VDD or the internal band gap

voltage can be selected as the DAC’s reference

voltage. When VDD is selected, VDD is internally

connected to the DAC reference circuit.

When the VREF pin is used with an external voltage

reference, the user can select between a gain of 1 or 2

and can have the reference buffer enabled or disabled.

When the gain is 2, the VREF pin voltage should be

limited to a maximum of VDD/2.

These devices have a four-wire SPI-compatible serial

interface with speeds up to 50 MHz for write and

25 MHz for read operations.

Applications

• Set Point or Offset Trimming

• Sensor Calibration

• Low-Power Portable Instrumentation

• PC Peripherals

• Data Acquisition Systems

MCP48CVBX1 Block Diagram (Single-Channel Output)

VDD

VSS

Memory

SCK

SDI

VREF1:VREF0

Note 1: Available only on specific packages.

VOUT0

VDD

PD1:PD0

VREF1:VREF0

OPAMP

PD1:PD0 and

VREF1:VREF0

DAC0

VREF

POWER-DOWN

GAIN

STATUS

DAC0

VREF

POWER-DOWN

GAIN

WIPERLOCK™

VOLATILE (4 x 16)

NONVOLATILE (13 x 16)

Power-up/Brown-out Control

SPI Serial Interface Module

and Control Logic

(WiperLock™ Technology)

Band gap

1.214V

VDD

GAIN

VIHH

LAT0

VBG

LAT/HVC

VREF0

SDO

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