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DS1808 Datasheet دیتاشیت PDF دانلود

دیتاشیت - Dallas Semiconducotr - Dual Log Digital Potentiometer

شماره قطعه DS1808
شرح مفصل Dual Log Digital Potentiometer
تولید کننده Dallas Semiconducotr 
آرم Dallas Semiconducotr 


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DS1808 شرح
DS1808
Dual Log Digital Potentiometer
www.maxim-ic.com
FEATURES
§ Two 32-position log-tapers
§ 60dB attenuation range:
–1dB per step (12 taps)
–2dB per step (12 taps)
–3dB per step (8 taps)
–90dB low-end attenuation
§ 2-Wire Interface Control
§ Power Supply: Dual ±12V
§ Maximum Voltage Across Potentiometers:
±12V
§ Standard Resistance Value: 45kW
§ Packages: 16-Pin SOIC
§ Operating Temperature: -40oC to +85oC
PIN ASSIGNMENT
GND
A2
A1
VB
A0
W0
L0
H0
1
2
3
4
5
6
7
8
16 VDD
15 VCC
14 SCL
13 SDA
12 CE
11 W
10 H1
9 L1
16-Pin SOIC (150-mil)
ORDERING INFORMATION
DS1808Z-050
16-Pin SOIC -40ºC to
+85ºC 45k
DS1808Z-050/T&R 16-Pin SOIC -40ºC to
+85ºC 45k
PIN DESCRIPTION
VCC
VB
VDD
H0, H1
L0, L1
W0, W1
SDA
- +12V Supply
- -12V Supply (substrate bias)
- 5V Digital Supply
- High-end Terminals
- Low-end Terminals
- Wiper Terminals
- 2-Wire Serial Data Input/Output
SCL - 2-Wire Clock Input
/CE - 2-Wire Interface Enable
GND
- Ground
A0, A1, A2 - Address Pins
DESCRIPTION
The DS1808 is a dual-channel, digitally controlled, log-taper potentiometer. Each potentiometer is
comprised of 32 wiper terminal positions plus a mute position. The device has three accessible
potentiometer terminals that include the high-side terminal (H), the low-side terminal (L), and the wiper
terminal (W). The resolution of the DS1808 is shown in Figure 8 and represents 1dB per step for the first
12 taps, 2dB per step for the next 12 taps and 3dB per step for the bottom 8 taps, providing a total
attenuation range of 60dB. The mute position of the DS1808 provides greater than 90dB of attenuation.
The wiper position on the resistor ladder is selected via a 6-bit register, whose value is controlled by the
industry-standard 2-wire interface. The interface consists of two control signals: SDA and SCL. The
DS1808 is available in a standard 45kW resistor value. The DS1808 is specified to operate over the
industrial temperature range (-40oC to +85oC) and is available in the 16-pin SOIC package. The DS1808
was designed for low-cost, stereo volume control applications. The device is specified to operate from
±12V ±10% supplies and accept a maximum input signal range of ±12V.
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