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MCP48FVB01 Arkusz danych(PDF) 34 Page - Microchip Technology

Numer części MCP48FVB01
Szczegółowy opis  8-/10-/12-Bit Single/Dual Voltage Output Volatile Digital-to-Analog Converters with SPI Interface
PDF  84 Pages
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Producent  MICROCHIP [Microchip Technology]
Strona internetowa  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP48FVB01 Arkusz danych(HTML) 34 Page - Microchip Technology

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MCP48FVBXX
DS20005466A-page 34
 2015 Microchip Technology Inc.
Register 4-2 shows the format of the Voltage
Reference Control Register. Each DAC has two bits to
control the source of the voltage reference of the DAC.
REGISTER 4-2:
VOLTAGE REFERENCE (VREF) CONTROL REGISTER (ADDRESS 08h)
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
R/W-0 R/W-0 R/W-0 R/W-0
Single
—
—
—
—
—
—
—
—
—
—
—
—
—(1)
—(1) VR0B VR0A
Dual
—
—
—
—
—
—
—
—
—
—
—
—
VR1B VR1A VR0B VR0A
bit 15
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
= Single-channel device
= Dual-channel device
Single
Dual
bit 15-2
bit 15-4
Unimplemented:
Read as ‘0’
bit 1-0
bit 3-0
VRxB-VRxA:
DAC Voltage Reference Control bits
11
=VREF pin (Buffered); VREF buffer enabled
10
=VREF pin (Unbuffered); VREF buffer disabled
01
=Internal Band Gap (1.22V typical); VREF buffer enabled
VREF voltage driven when powered-down
00
=VDD (Unbuffered); VREF buffer disabled.
Use this state with Power-Down bits for lowest current.
Note 1:
Unimplemented bit, read as ‘0’.



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