參數(shù)資料
型號(hào)： DS3908N+T&R
廠商： Maxim Integrated Products
文件頁數(shù)： 6/11頁
文件大?。?/td> 0K
描述： IC POT DUAL DIGITAL 14-TDFN
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
接片： 64
電阻（歐姆）： 100k
電路數(shù)： 2
溫度系數(shù)： 標(biāo)準(zhǔn)值 50 ppm/°C
存儲(chǔ)器類型： 非易失
接口： I²C（設(shè)備位址）
電源電壓： 3 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 14-WFDFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 14-TDFN-EP（3x3）
包裝： 帶卷 (TR)
DS3908
Dual, 64-Position Nonvolatile Digital
Potentiometer with Buffered Outputs
4
_____________________________________________________________________
NONVOLATILE MEMORY CHARACTERISTICS
(VCC = +3.0V to +5.5V.)
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
EEPROM Write Cycles
At +70°C
50,000
Note 1:
All voltages are referenced to ground.
Note 2:
ISTBY specified assuming control pins are connected as follows: WP must be disconnected or connected high. H terminal
connected to VCC, L terminal connected to GND, potentiometer position 1Dh, PGA is at 2V/V, A0 to A2 connected to VCC,
SDA and SCL connected to VCC, with no load.
Note 3:
Absolute linearity is used to measure expected wiper voltage as determined by wiper position in a voltage-divider
configuration.
Note 4:
This specification only refers to the potentiometers, and does not include the gain and offset error due to the PGA.
Note 5:
Relative linearity is used to determine the change of wiper voltage between two adjacent wiper positions in a voltage-
divider configuration.
Note 6:
I2C interface timing shown is for fast-mode (400kHz) operation. This device is also backward-compatible with I2C stan-
dard-mode timing.
Note 7:
CB—total capacitance of one bus line in picofarads, timing referenced to 0.9 x VCC and 0.1 x VCC.
Note 8:
EEPROM write begins after a stop condition occurs.
0
0.6
0.4
0.2
0.8
1.0
1.2
1.4
1.6
1.8
2.0
3.0
4.0
3.5
4.5
5.0
5.5
STANDBY SUPPLY CURRENT
vs. SUPPLY VOLTAGE
DS3908
toc01
VCC
I STBY
(mA)
Hx = VCC, Lx = GND
A0 TO A2 = VCC
SDA, SCL = VCC
POT AT 1Dh
GAIN = 2V/V
NO LOAD
+85
°C +25°C
-40
°C
0
0.6
0.4
0.2
0.8
1.0
1.2
1.4
1.6
1.8
2.0
-40
10
-15
35
60
85
STANDBY SUPPLY CURRENT
vs. TEMPERATURE
DS3908
toc02
TEMPERATURE (
°C)
I STBY
(mA)
3.3V
5.5V
4.0V
1
10,000
1,000,000
STANDBY SUPPLY CURRENT
vs. SCL FREQUENCY
DS3908
toc03
SCL FREQUENCY (Hz)
I STBY
(mA)
100
1.16400
1.15000
1.15200
1.15400
1.15600
1.15800
1.16200
1.16000
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
1.30000
1.10000
1.50000
1.40000
1.60000
1.70000
1.80000
1.90000
1.00000
0
10
20
30405060
OUTPUT VOLTAGE vs. POT SETTING
DS3908
toc04
POT SETTING (DEC)
OUTPUT
VOLTAGE
AT
Vx
(mA)
GAIN = 1V/V
Hx = 1V
Lx = 0.3V
0.001
0.01
0.1
1
10
100
VOL vs. IOUT:SINK
1
0.1
0.01
0.001
10
DS3908
toc05
IOUT:SINK (mA)
V
OL
(V)
+85
°C +25°C
-40
°C
0.001
0.01
0.1
1
10
100
VCC - VOH vs. IOUT:SOURCE
1
0.1
0.01
0.001
10
DS3908
toc06
IOUT:SOURCE (mA)
V
CC
-
V
OH
(V)
+85
°C +25°C
-40
°C
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