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DS1800 Datasheet

  • DS1800

  • Dual Inverting Log Gain/Attenuator

  • Dallas   Dallas

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DS1800
Dual Inverting Log Gain/Attenuator
www.dalsemi.com
FEATURES
Ultra-low power consumption
Operates from 3V or 5V supplies
Two digitally controlled, 128-position
potentiometers including mute
Logarithmic gain characteristics
Zero-crossing detection eliminates noise
caused by discrete wiper changes
Two control interfaces
- 3-wire serial CPU control
- Pushbutton control
20-pin DIP (300-mil), 20-pin SOIV (300-
mil), and 20-pin (173-mil) TSSOP packaging
available
Operating Temperature Range:
- Industrial: -40擄C to +85擄C
Software and hardware mute
Standard Resistance Available: 53K鈩?/div>
PIN ASSIGNMENT
GND
C
OUT
CLK
D
RST
ZCEN
MODE
W0
OUT0
IN0
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
P1G
P1A
P0G
P0A
MUTE
AGND
IN1
OUT1
W1
20-Pin DIP (300-mil)
20-Pin SOIC (300-mil)
20-Pin TSSOP
See Mech. Drawings Section
PIN DESCIPTION
OUT0,OUT1
IN0, IN1
W0,W1
V
CC
RST
CLK
D
C
OUT
P0G,P1G
P0A,P1A
ZCEN
MUTE
AGND
GND
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Low-end of resistor
High-end of resistor
Wiper Terminal
3V or 5V Power Supply Input
Serial Port Reset Input
Serial Port Clock Input
Serial Port Data Input
Cascade Data Output
Gain Input Pot Controls
Attenuation Input Pot Controls
Zero-Crossing Detect Input
Hardware Mute Control Input
Analog Ground
Ground
1 of 14
032000

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