MCP4728 Datasheet, PDF(25/66 Page) Microchip Technology – 12-Bit, Quad Digital-to-Analog Converter with EEPROM Memory

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MCP4728 Datasheet, PDF (25/66 Pages) Microchip Technology – 12-Bit, Quad Digital-to-Analog Converter with EEPROM Memory

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MCP4728

TABLE 4-3: CONFIGURATION BITS

Bit Name

Functions

RDY/BSY

(A2, A1, A0)

VREF

DAC1, DAC0

PD1, PD0

UDAC

This is a status indicator (flag) of EEPROM programming activity:

1 = EEPROM is not in programming mode

0 = EEPROM is in programming mode

Note: RDY/BSY status can also be monitored at the RDY/BSY pin.

Device I2C address bits. See Section 5.3 âMCP4728 Device Addressingâ for more details.

Voltage Reference Selection bit:

0 = VDD

1 = Internal voltage reference (2.048V)

Note: Internal voltage reference circuit is turned off if all channels select external reference

(VREF = VDD).

DAC Channel Selection bits:

00 = Channel A

01 = Channel B

10 = Channel C

11 = Channel D

Power-Down selection bits:

00 = Normal Mode

01 = VOUT is loaded with 1 kÎ© resistor to ground. Most of the channel circuits are powered off.

10 = VOUT is loaded with 100 kÎ© resistor to ground. Most of the channel circuits are powered

off.

Note: See Table 4-7 and Figure 4-1 for more details.

Gain selection bit:

0 = x1 (gain of 1)

1 = x2 (gain of 2)

Note: Applicable only when internal VREF is selected. If VREF = VDD, the device uses a gain of

1 regardless of the gain selection bit setting.

DAC latch bit. Upload the selected DAC input register to its output register (VOUT):

0 = Upload. Output (VOUT) is updated.

1 = Do not upload.

Note: UDAC bit affects the selected channel only.

DS22187C-page 25

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