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| 型号： | DS1807S |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/13页 |
| 文件大小： | 0K |
| 描述： | IC POT ADDRESS 2X AUDIO 16-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 45 |
| 接片： | 64 |
| 电阻（欧姆）： | 45k |
| 电路数： | 2 |
| 温度系数： | 标准值 750 ppm/°C |
| 存储器类型： | 易失 |
| 接口： | I²C（芯片选择） |
| 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： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 管件 |
DS1807
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DS1807 ATTENUATOR CONFIGURATION Figure 3
ZERO-CROSSING DETECTION
The DS1807 provides many features for digitally controlled audio applications. Zero-crossing detection is
useful in eliminating “zipper noise,” which is commonly associated with digital potentiometers. Zipper
noise (because it sounds like a zipper) is caused by discrete wiper position changes on the resistor array.
These changes cause discontinuities in the audio output signal which are manifested as audible pops
heard at the output of the audio chain. If subsequent amplification follows the digital potentiometer, this
audible noise can be quite disturbing. The DS1807 minimizes zipper noise by allowing wiper position
changes only during zero-crossings of the input signal.
The zero-crossing detection feature can be enabled or disabled via software. The complete software
command for enabling or disabling zero-crossing is discussed in the section, “2-wire serial data bus.”
When enabled, the zero-crossing detection feature allows independent wiper changes within a 50
millisecond time window when the Hx and Lx (where x = 0 or 1) terminals have equal potentials. The 50
millisecond time window begins once the DS1807 has responded with an ACKNOWLEDGE after a
“write potentiometer “ command. The STOP condition is discussed in the following section.
If at 50 milliseconds the DS1807 has not detected a zero-crossing (Hx - Lx = 0), the wiper position of the
potentiometer(s) will change regardless of the state of the input signal.
When the zero-crossing detection feature is not activated, the DS1807 will allow movement to the new
wiper position as soon as the ACKNOWLEDGE condition has been issued by the master controlling
device.
The DS1807 is designed to provide the zero-crossing detection feature when initially powered. If this
feature is not to be used, it must be deactivated once the device has reached a fully powered condition.
2-WIRE SERIAL DATA BUS
The DS1807 supports a bi-directional 2-wire bus and data transmission protocol. A device that sends data
on the bus is defined as a transmitter, and a device receiving data as a receiver. The device that controls
the message is called a “master.” The devices that are controlled by the master are “slaves.” The bus must
be controlled by a master device which generates the serial clock (SCL), controls the bus access, and
generates the START and STOP conditions. The DS1807 operates as a slave on the 2-wire bus.
Connections to the bus are made via the open-drain I/O line, SDA, and the serial clock line, SCL.
The following bus protocol has been defined (See Figure 4).
§ Data transfer may be initiated only when the bus is not busy.
§ During data transfer, the data line must remain stable whenever the clock line is HIGH. Changes in
the data line while the clock line is high will be interpreted as control signals.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1807S/T&R | 制造商:Maxim Integrated Products 功能描述:ADDRESABL DUAL AUDIO POT 16L SO T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC POT ADDRESS 2X AUDIO 16-SOIC |
| DS1807S/T&R | 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| DS1807S/TR | 制造商:Maxim Integrated Products 功能描述:Digital Potentiometer, 16 Pin, Plastic, SOP |
| DS1807S+ | 功能描述:数字电位计 IC Addressable Dual Audio Taper RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| DS1807S+T&R | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 65POS 45KOHM DUAL 16SOIC W - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC POT ADDRESS 2X AUDIO 16-SOIC 制造商:Maxim Integrated Products 功能描述:Digital Potentiometer ICs Addressable Dual Audio Taper |
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