MAX5413EUD 데이터 시트보기 (PDF) - Maxim Integrated
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MAX5413EUD Datasheet PDF : 11 Pages
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Dual, 256-Tap, Low-Drift, Digital Potentiometers
in 14-Pin TSSOP
PIN
1
2
3
4
5, 6, 10
7
8
9
11
12
13
14
NAME
GND
LB
HB
WB
N.C.
CS
DIN
SCLK
VDD
WA
HA
LA
Pin Description
FUNCTION
Ground
Low Terminal of Resistor B
High Terminal of Resistor B
Wiper Terminal of Resistor B
No Connection to this Terminal
SPI Chip Select
SPI Serial Data Input
SPI Clock Input
Power Supply, +2.7V to +5.5V. Connect a 0.1µF capacitor to GND.
Wiper Terminal of Resistor A
High Terminal of Resistor A
Low Terminal of Resistor A
POR
VDD
MAX5413
MAX5414
GND
MAX5415
HA
R
8
R
8
256
8-BIT
DECODE
WA
9-BIT
LATCH
DIN
SHIFT
REGISTER
LA
HB
8
256
R
8-BIT
DECODE
WB
LATCH
LB
SCLK
SR
CS
DECODE
Figure 1. MAX5413/MAX5414/MAX5415 Functional Diagram: Dual 3-Terminal Potentiometers in 14-Pin TSSOP Configuration
Detailed Description
Each potentiometer consists of 255 fixed resistors in
series between pins HX and LX (Figure 1). The poten-
tiometer wiper (pin WX) can be programmed to access
any one of the 256 different tap points on the resistor
string. The MAX5413/MAX5414/MAX5415 require nine
bits to program the wiper position. The first bit is an
address code, allowing one or the other potentiometer
to be selected for programming. The potentiometers
are programmed independently of each other.
The MAX5413/MAX5414/MAX5415 use a 3-wire serial
data interface to control the wiper tap position. This
write-only interface contains three inputs: Chip Select
(CS), Data In (DIN), and Data Clock (SCLK). When CS
is taken low, data from the DIN pin is synchronously
loaded into the serial shift register on each rising edge
of each SCLK pulse (Figure 2). After all the data bits
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