MCP47FVB02 datasheet(48/92 Pages) MICROCHIP

Part #	MCP47FVB02

Description	8-/10-/12-Bit Single/Dual Voltage Output Nonvolatile Digital-to-Analog Converters with SPI Interface

PDF	92 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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48 / 92 page

MCP48FEBXX

DS20005429B-page 48

 2015 Microchip Technology Inc.

5.4

Internal Band Gap

The internal band gap is designed to drive the Resistor

Ladder Buffer.

The resistance of a resistor ladder (RRL) is targeted to

be 140 k

 (40 k), which means a minimum

resistance of 100 k

.

The band gap selection can be used across the VDD

voltages while maximizing the VOUT voltage ranges.

For VDD voltages below the 2  Gain  VBG voltage, the

output for the upper codes will be clipped to the VDD

voltage. Table 5-4 shows the maximum DAC register

code given device VDD and Gain bit setting.

TABLE 5-4:

VOUT USING BAND GAP

Max DAC Code (1)

12-bit 10-bit 8-bit

Comment

5.5

FFFh

3FFh

FFh VOUT(max) = 2.44V (

FFFh

3FFh

FFh VOUT(max) = 4.88V (

2.7

FFFh

3FFh

FFh VOUT(max) = 2.44V (

8DAh

236h

8Dh ~ 0 to 55% range

2.0(

D1Dh

347h

D1h ~ 0 to 82% range

2(4) 68Eh

1A3h

68h ~ 0 to 41% range

Note 1:

Without the VOUT pin voltage being clipped.

When VBG = 1.22V typical.

Band gap performance achieves full

performance starting from a VDD of 2.0V.

It is recommended to use Gain = 1 setting

instead.

MCP47FVB02 Datasheet(PDF) 48 Page - Microchip Technology

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