13 FN7902.0 August 19, 2011 Functional Pin Descriptions Potentiometers Pins RHI
參數(shù)資料
型號: ISL23328UFRUZ-T7A
廠商: Intersil
文件頁數(shù): 5/20頁
文件大小: 0K
描述: IC DGTL POT 2CH 50K 16UTQFN
標(biāo)準(zhǔn)包裝: 1
系列: XDCP™
接片: 128
電阻(歐姆): 50k
電路數(shù): 2
溫度系數(shù): 標(biāo)準(zhǔn)值 65 ppm/°C
存儲器類型: 易失
接口: I²C(設(shè)備位址)
電源電壓: 1.2 V ~ 5.5 V,1.7 V ~ 5.5 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 16-UFQFN
供應(yīng)商設(shè)備封裝: 16-UTQFN(2.6x1.8)
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: ISL23328UFRUZ-T7ADKR
ISL23328
13
FN7902.0
August 19, 2011
Functional Pin Descriptions
Potentiometers Pins
RHI AND RLI
The high (RHi, i = 0, 1) and low (RLi, i = 0, 1) terminals of the
ISL23328 are equivalent to the fixed terminals of a mechanical
potentiometer. RHi and RLi are referenced to the relative position
of the wiper and not the voltage potential on the terminals. With
WRi set to 127 decimal, the wiper will be closest to RHi, and with
the WR set to 0, the wiper is closest to RLi.
RWI
RWi (i = 0, 1) is the wiper terminal, and it is equivalent to the
movable terminal of a mechanical potentiometer. The position of
the wiper within the array is determined by the WRi register.
VCC
Power terminal for the potentiometer section analog power
source. Can be any value needed to support voltage range of DCP
pins, from 1.7V to 5.5V, independent of the VLOGIC voltage.
Bus Interface Pins
SERIAL DATA INPUT/OUTPUT (SDA)
The SDA is a bi-directional serial data input/output pin for I2C
interface. It receives device address, wiper address and data
from an I2C external master device at the rising edge of the serial
clock SCL, and it shifts out data after each falling edge of the
serial clock.
SDA requires an external pull-up resistor, since it is an open drain
input/output.
FIGURE 21. WIPER LARGE SIGNAL SETTLING TIME
FIGURE 22. POWER-ON START-UP IN VOLTAGE DIVIDER MODE
FIGURE 23. 10k -3dB CUT OFF FREQUENCY
FIGURE 24. STANDBY CURRENT vs TEMPERATURE
Typical Performance Curves (Continued)
9TH CLOCK OF THE
DATA BYTE (ACK)
1V/DIV
0.2s/DIV
SCL
WIPER
0.5V/DIV
20s/DIV
VCC
WIPER
0.5V/DIV, 0.2s/DIV
-3dB FREQUENCY = 1.4MHz AT MIDDLE TAP
CH1: RH TERMINAL
CH2: RW TERMINAL
0
0.2
0.4
0.6
0.8
1.0
1.8
-40
-15
10
35
60
85
110
S
T
A
N
D
B
Y
C
U
R
E
N
T
I C
C
(
A
)
TEMPERATURE (°C)
VCC = 5.5V, VLOGIC = 5.5V
VCC = 1.7V, VLOGIC = 1.2V
1.6
1.4
1.2
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