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參數資料
| 型號： | DV42XXX |
| 廠商： | Microchip Technology |
| 文件頁數： | 1/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | KIT EVAL DIGITAL POT MCP42XXX |
| 標準包裝： | 1 |
| 其它名稱： | Q1133465 |
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2003 Microchip Technology Inc.
DS11195C-page 1
M
MCP41XXX/42XXX
Features
256 taps for each potentiometer
Potentiometer values for 10 k
, 50 k and
100 k
Single and dual versions
SPI serial interface (mode 0,0 and 1,1)
±1 LSB max INL & DNL
Low power CMOS technology
1 A maximum supply current in static operation
Multiple devices can be daisy-chained together
(MCP42XXX only)
Shutdown feature open circuits of all resistors for
maximum power savings
Hardware shutdown pin available on MCP42XXX
only
Single supply operation (2.7V - 5.5V)
Industrial temperature range: -40°C to +85°C
Extended temperature range: -40°C to +125°C
Block Diagram
Description
The MCP41XXX and MCP42XXX devices are 256-
position, digital potentiometers available in 10 k
,
50 k
and 100 k resistance versions. The
MCP41XXX is a single-channel device and is offered in
an 8-pin PDIP or SOIC package. The MCP42XXX con-
tains two independent channels in a 14-pin PDIP, SOIC
or TSSOP package. The wiper position of the
MCP41XXX/42XXX varies linearly and is controlled via
an industry-standard SPI interface. The devices con-
sume <1 A during static operation. A software shut-
down feature is provided that disconnects the “A”
terminal from the resistor stack and simultaneously con-
nects the wiper to the “B” terminal. In addition, the dual
MCP42XXX has a SHDN pin that performs the same
function in hardware. During shutdown mode, the con-
tents of the wiper register can be changed and the
potentiometer returns from shutdown to the new value.
The wiper is reset to the mid-scale position (80h) upon
power-up. The RS (reset) pin implements a hardware
reset and also returns the wiper to mid-scale. The
MCP42XXX SPI interface includes both the SI and SO
pins, allowing daisy-chaining of multiple devices. Chan-
nel-to-channel resistance matching on the MCP42XXX
varies by less than 1%. These devices operate from a
single 2.7 - 5.5V supply and are specified over the
extended and industrial temperature ranges.
Package Types
16-Bit
Shift
V
DD
V
SS
SI
SCK
RS SHDN
PB1
PA1
PW1
Resistor
Array 1*
Wiper
Register
PB0
PW0
PA0
Resistor
Array 0
Wiper
Register
S0
Control
Logic
CS
*Potentiometer P1 is only available on the dual
MCP42XXX version.
MCP42XXX
1
2
3
4
11
12
13
14
8
9
10
5
6
7
PDIP/SOIC/TSSOP
PB1
PA1
PW1
SHDN
SO
RS
PW0
PB0
CS
PA0
SCK
SI
V
SS
V
DD
M
C
P
4
1XXX
1
2
3
4
5
6
7
8
PDIP/SOIC
PB0
PA0
V
DD
PW0
V
SS
CS
SCK
SI
Single/Dual Digital Potentiometer with SPI Interface
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