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參數資料
| 型號： | DS3908N+T&R |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 9/11頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC POT DUAL DIGITAL 14-TDFN |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 接片： | 64 |
| 電阻（歐姆）： | 100k |
| 電路數： | 2 |
| 溫度系數： | 標準值 50 ppm/°C |
| 存儲器類型： | 非易失 |
| 接口： | I²C（設備位址） |
| 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 |
| 供應商設備封裝： | 14-TDFN-EP（3x3） |
| 包裝： | 帶卷 (TR) |
DS3908
Dual, 64-Position Nonvolatile Digital
Potentiometer with Buffered Outputs
_____________________________________________________________________
7
I2C Slave Address and Address Pins
The DS3908’s I2C slave address is determined by the
state of the A0, A1, and A2 address pins as shown in
the pin configuration (see Figure 1). Address pins con-
nected to GND result in a ‘0’ in the corresponding bit
position in the slave address. Conversely, address pins
connected to VCC result in a ‘1’ in the corresponding bit
positions. I2C communication is described in detail in
the I2C Serial Interface Description section.
Potentiometer Control
The potentiometers of the DS3908 have 64 taps with 63
resistive elements separating them. Thus, the most and
least significant wiper positions connect the amplifier to
the voltages at the high and low terminals of the poten-
tiometer, respectively.
The potentiometers of the DS3908 are controlled by
communicating with the following registers:
*THE SLAVE ADDRESS IS DETERMINED BY
ADDRESS PINS A0, A1, AND A2.
1
MSB
SLAVE
ADDRESS*
READ/WRITE
BIT
LSB
01
0
A2
A1
A0
R/W
Figure 1. DS3908 Slave Address Byte
Table 1. Potentiometer Registers
ADDRESS
POTENTIOMETER
I2C FUNCTIONS
NUMBER OF
POSITIONS*
DEFAULTS
F8h
Pot 0
Read/Write
64 (00h to 3Fh)
1Fh
F9h
Pot 1
Read/Write
64 (00h to 3Fh)
1Fh
FAh
Pot 0 and Pot 1
Write Only
64 (00h to 3Fh)
—
*The two most significant bits of each potentiometer position register are ignored. Writing values greater than 3Fh to any of the
potentiometer registers will result in a valid 6-bit position, without regard to the value of the most significant two bits. Example:
Register values C2h, 82h, 42h, and 02h are all potentiometer position 2.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| DS3911 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Temperature-Controlled, Nonvolatile, I2C Quad DAC |
| DS3911T+ | 功能描述:ADC / DAC多通道 Fast APD Bias RoHS:否 制造商:Texas Instruments 轉換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| DS3911T+T | 功能描述:ADC / DAC多通道 Fast APD Bias RoHS:否 制造商:Texas Instruments 轉換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| DS3920 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Fast Current Mirror |
| DS3920_1112 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Fast Current Mirror |
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