DS1808 Datasheet, PDF (1/17 Pages) Maxim Integrated Products – Process: 1P, 1M, 5.0um, 30V NF & PF, UVNd, UVPd ,N+ESD,TEOS Spacer, Passivation w/Nov TEOS Oxide-Nitride

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: -40^oC to +85^oC
PIN ASSIGNMENT
GND 1
A2 2
A1 ₃
V_B
4
A0 ₅
W0 ⁶
L0 ₇
H0 ⁸
16 V_DD
15 V_CC
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 45kΩ
DS1808Z-050/T&R 16-Pin SOIC -40ºC to
+85ºC 45kΩ
PIN DESCRIPTION
V_CC
V_B
V_DD
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 (-40^oC to +85^oC) 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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