參數(shù)資料
型號(hào)： DS3905U-020+T&R
廠商： Maxim Integrated Products
文件頁數(shù)： 1/11頁
文件大?。?/td> 0K
描述： IC POT NV TRIPLE 128POS 10-USOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 3,000
接片： 128
電阻（歐姆）： 20k
電路數(shù)： 3
溫度系數(shù)： 標(biāo)準(zhǔn)值 123 ppm/°C
存儲(chǔ)器類型： 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 ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 10-µMAX
包裝： 帶卷 (TR)
General Description
The DS3904/DS3905 contain three nonvolatile (NV) low
temperature coefficient, variable digital resistors. Each
resistor has 128 user-selectable positions. Additionally,
the DS3904/DS3905 have a high-impedance setting that
allows each resistor to function as a digital switch. The
DS3904/DS3905 can operate over a 2.7V to 5.5V supply
voltage range, and communication with the device is
achieved through a 2-wire serial interface. Address pins
allow multiple DS3904/DS3905s to operate on the same
two-wire bus. The DS3904 has one address pin, allow-
ing two DS3904s to share the bus, while the DS3905
has three address pins, allowing up to eight DS3905s to
share a common bus. The low-cost and small size of the
DS3904/DS3905 make them ideal replacements for con-
ventional mechanical trimming resistors.
Applications
Power-Supply Calibration
Cell Phones and PDAs
Fibre Optic Transceiver Modules
Portable Electronics
Small and Low-Cost Replacement for
Conventional Mechanical Trimming Resistors/
Dip Switches
Test Equipment
Features
Three 20kΩ
Ω, or Two 20kΩ
Ω and One 10kΩ
Ω, 128-
Position Linear Digital Resistors
Resistor Settings are Stored in NV Memory
Each Resistor has a High-Impedance Setting for
Switch Operation to Control Digital Logic
Low Temperature Coefficient
2-Wire Serial Interface
2.7V to 5.5V Operating Range
-40°C to +85°C Industrial Temperature
Packaging: 8-Pin SOP for DS3904, 10-pin SOP
for DS3905
DS3904/DS3905
Triple 128-Position Nonvolatile Digital
Variable Resistor/Switch
_____________________________________________
Maxim Integrated Products
1
Pin Configurations
0.1
μF
4.7k
Ω
2-WIRE
MASTER
VCC
H0
H1
H2
RHIZ
R10
VCC
SCL
SDA
(DS3905 ONLY)
A1
A2
RESISTOR 0
ADDR F8h
RESISTOR 1
ADDR F9h
RESISTOR 2
ADDR FAh
A0
GND
4.7k
Ω
VARIABLE RESISTANCE
FOR ADJUSTABLE
CURRENT SOURCE
INTERFACE EXAMPLES
2-WIRE
ADDRESSABLE
SWITCH (USING 00h
AND RHIZ SETTINGS)
GAIN
CONTROL
VIN
DS3904/DS3905
VCC
RHIZ
R11
DIGITAL
LOGIC
R12
Typical Operating Circuit
Ordering Information
Rev 3; 3/07
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART
TEMP RANGE
PIN-
PACKAGE
(R0/R1/R2)
RESISTANCE (k )
DS3904U-010 -40°C to +85°C 8 μSOP
20/10/20 + High-Z
DS3904U-020 -40°C to +85°C 8 μSOP
20/20/20 + High-Z
DS3905U-020 -40°C to +85°C 10 μSOP
20/20/20 + High-Z
8
6
5
1
3
4
SDA
TOP VEIW
A0
7
2
SCL
H0
H1
H2
μSOP
VCC
GND
DS3904
10
1
A1
A2
9
2
SDA
A0
μSOP
8
3H0
SDL
7
4
H1
VCC
6
5
H2
GND
DS3905
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