参数资料
型号: DS3906U+T&R
厂商: Maxim Integrated Products
文件页数: 12/14页
文件大小: 0K
描述: IC RESIST VAR TRPL 10USOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 3,000
接片: 64
电阻(欧姆): 1.45k,2.54k,2.54k
电路数: 3
温度系数: 标准值 60 ppm/°C
存储器类型: 非易失
接口: I²C(设备位址)
电源电压: 2.7 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
供应商设备封装: 10-µMAX
包装: 带卷 (TR)
DS3906
Triple NV Low Step Size Variable
Resistor Plus Memory
_____________________________________________________________________
7
Detailed Description
The DS3906 contains three variable resistors plus a
user EEPROM. The block diagram illustrates these in
addition to the registers that control the resistors. The
following sections provide detailed information about
the DS3906.
Memory Organization
The DS3906 contains 16 bytes of User EEPROM plus 3
NV resistor registers. Refer to Table 1. Communication
with the memory/registers is achieved through the I2C-
compatible serial interface and is described in subse-
quent sections.
Resistor Registers/Settings
Each of the three resistors in the DS3906 has its own
control register used to set the resistor position. Refer
to the block diagram and Table 2. Each resistor has 64
positions plus a high impedance state. The nominal
resistance values for each position is listed in Table 3.
Resistors 0 and 1 have the same full-scale resistance,
which is different than resistor 2. As shown in Table 3,
the resistors have a pseudo-log response (resistance
vs. position) when used without an external parallel
resistor. Valid resistor settings are 00h to 3Fh. Writing a
value greater than 3Fh to any of the resistor registers
Pin Description
PIN
NAME
FUNCTION
1A1
I
2C Address Input. Inputs A0, A1, and A2 determine the I2C slave address of the device.
2
SDA
I
2C Serial Data Open-Drain Input/Output
3
SCL
I
2C Serial Clock Input
4VCC
Power Supply Voltage
5
GND
Ground
6H2
High Terminal of Resistor 2
7H1
High Terminal of Resistor 1
8H0
High Terminal of Resistor 0
9A0
10
A2
I
2C Address Input. Inputs A0, A1, and A2 determine the I2C slave address of the device.
Block Diagram
I2C
INTERFACE
USER
EEPROM
16 BYTES
(00h-0Fh)
RHIZ CONTROL
EEPROM
RES 0
2.54k
H0
F8h
MSB
6
LSB
GND
SCL
SDA
A0
VCC
DS3906
RESISTOR 0
RHIZ CONTROL
RES 1
2.54k
H1
F9h
MSB
LSB
RESISTOR 1
RHIZ CONTROL
RES 2
1.45k
H2
FAh
MSB
LSB
RESISTOR 2
6
A1
A2
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