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2012 Microchip Technology Inc.
DS25118C-page 1
MCP47DA1
Features
6-Bit DAC
- 65 Taps: 64 Resistors with Taps to Full-Scale
and Zero-Scale (Wiper Code 00h to 40h)
- 7-bit Serial Data (00h to 7Fh, 00h - 20h =
Zero-Scale and 60h - 7Fh = Full-Scale)
VREF Pull-down Resistance: 30 k (typical)
VOUT Voltage Range
- 1/3 * VREF to 2/3 * VREF
I2C
Protocol
- Supports SMBus 2.0 Write Byte/Word
Protocol Formats
- Supports SMBus 2.0 Read Byte/Word
Protocol Formats
- Slave Addresses: 5Ch and 7Ch
Brown-out Reset Protection (1.5V typical)
Power-on Default Wiper Setting (Mid-scale)
Low-Power Operation: 90 A Static Current (typ.)
Wide Operating Voltage Range:
- 2.7V to 5.5V - Device Characteristics Specified
- 1.8V to 2.7V - Device Operation
Low Tempco: 15 ppm (typical)
100 kHz (typical) Bandwidth (-3 dB) Operation
Extended Temperature Range (-40°C to +125°C)
Small Packages, SOT-23-6, SC70-6
Lead Free (Pb-free) Package
Applications
PC Servers (I2C Protocol with Command Code)
Set point or offset trimming
Cost-sensitive mechanical trim pot replacement
Package Types
Device Block Diagram
Description
The MCP47DA1 devices are volatile, 6-Bit digital
potentiometers with a buffered output. The wiper
setting is controlled through an I2C serial interface. The
MCP47DA1. I2C slave addresses of “010 1110” and
“011
1110”
are supported. The MCP47DA1 has a
windowed output (1/3 to 2/3 of VREF).
Device Features
MCP47DA1
SOT-23-6, SC70-6
4
1
2
3
6 VREF
SDA
VDD
VSS
SCL
5 VOUT
A
W
B
V
DD
V
SS
SCL
VOUT
B
W
ip
e
rR
egi
st
er
(R
AB
=
1
0
K
)
SDA
VREF
2-Wire
Interface
and
Control
Logic
Power-up
and
Brown-out
Control
10 K
10 K
A
Device
Inte
rf
ace
#
o
fT
a
p
s
#
o
f
R
esi
stor
s
V
RE
F
R
esi
st
a
n
ce
Da
ta
Va
lu
e
Ra
ng
e
POR/BO
R
Va
lu
e
I2
C
Slav
e
Addres
s
V
DD
O
p
er
ati
ng
Ra
ng
e
(
1
)
V
OU
T
Ra
ng
e
Package(s)
MCP47DA1
I2C
65
64
30.0
00h - 7Fh
40h
5Ch, 7Ch 1.8V to 5.5V
1/3 VREF to
2/3 VREF
SOT-23-6,
SC70-6
Note 1: Analog characteristics only tested from 2.7V to 5.5V.
6-Bit Windowed Volatile DAC with Command Code
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