FN6912.1 April 15, 2010 Pin Description Potentiometers Pins RH AND RL The high (RH) and low (RL) terminals of the ISL22317 are eq" />
參數(shù)資料
型號(hào): ISL22317WFRTZ-TK
廠商: Intersil
文件頁(yè)數(shù): 2/15頁(yè)
文件大?。?/td> 0K
描述: IC POT DGTL 128TP LN LP 10-TDFN
產(chǎn)品培訓(xùn)模塊: Solutions for Industrial Control Applications
標(biāo)準(zhǔn)包裝: 1,000
系列: XDCP™
接片: 128
電阻(歐姆): 10k
電路數(shù): 1
溫度系數(shù): 標(biāo)準(zhǔn)值 ±10 ppm/°C
存儲(chǔ)器類(lèi)型: 非易失
接口: I²C(設(shè)備位址)
電源電壓: 2.7 V ~ 5.5 V
工作溫度: -40°C ~ 125°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 10-WFDFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝: 10-TDFN-EP(3x3)
包裝: 帶卷 (TR)
10
FN6912.1
April 15, 2010
Pin Description
Potentiometers Pins
RH AND RL
The high (RH) and low (RL) terminals of the ISL22317 are
equivalent to the fixed terminals of a mechanical
potentiometer. RH and RL are referenced to the relative
position of the wiper and the voltage potential on the
terminals. With WR set to 127 decimal, the wiper will be
closest to RH. With the WR set to 0, the wiper is closest to
RL. The voltage potential on the RH terminal must be higher
than voltage potential on RL terminal.
RW
RW is the wiper terminal and is equivalent to the movable
terminal of a mechanical potentiometer. The position of the
wiper within the array is determined by the WR register.
REF_A, REF_B
REF_A and REF_B are pins to connect an external resistor.
If application is required to connect RL terminal to GND, then
the REF_B pin should also be connected to GND.
Warning! Do not connect REF_A to GND under any
circumstances. That may damage the ISL22317.
Bus Interface Pins
SERIAL DATA INPUT/OUTPUT (SDA)
The SDA is a bidirectional serial data input/output pin for I2C
interface. It receives device address, operation code, 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.
SERIAL CLOCK (SCL)
This input is the serial clock of the I2C serial interface.
DEVICE ADDRESS (A1)
The address input is used to set the A1 bit of the 7-bit I2C
interface slave address, see Table 4. A match in the slave
address serial data stream must match with the Address
input pins in order to initiate communication with the
FIGURE 17. TC FOR RHEOSTAT MODE (10k/50k/100k) IN ppm
[RREF 2ppm/°C]
FIGURE 18. TC FOR VOLTAGE DIVIDER MODE (10k/50k/100k)
IN ppm [RREF 10ppm/°C]
FIGURE 19. STANDBY ICC vs TEMPERATURE
FIGURE 20. WIPER RESISTANCE vs TAP POSITION WHEN
PRECISION IS OFF
Typical Performance Curves (Continued)
0
10
20
30
40
15
35
55
75
95
115
TAP POSITION (DECIMAL)
TCr
(ppm/
C)
VCC = 5.5V
VCC = 2.7V
0
10
20
30
40
15
35
55
75
95
115
TAP POSITION (DECIMAL)
TCv
(ppm
/C)
VCC = 5.5V
VCC = 2.7V
0
200
400
600
800
-40
0
40
80
120
TEMPERATURE (°C)
IS
B
(uA
)
VCC = 5.5V
VCC = 2.7V
0
20
40
60
80
100
0
20406080
100
120
TAP POSITION (DECIMAL)
WIPE
R
RES
IS
TANCE
(Ω
)
T = +125°C
T = +25°C
T = -40°C
VCC = 5.5V
ISL22317
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