DS1808Z-050+T&R Maxim Integrated Products, DS1808Z-050+T&R Datasheet

IC POT DUAL LOG HV 50K 16-SOIC

DS1808Z-050+T&R

Manufacturer Part Number
DS1808Z-050+T&R
Description
IC POT DUAL LOG HV 50K 16-SOIC
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS1808Z-050+T&R

Taps
32
Resistance (ohms)
45K
Number Of Circuits
2
Temperature Coefficient
750 ppm/°C Typical
Memory Type
Volatile
Interface
I²C, 2-Wire Serial
Voltage - Supply
4.5 V ~ 5.5 V, ±4.5 V ~ 13.2 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (3.9mm Width)
Resistance In Ohms
45K
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
§ Two 32-position log-tapers
§ 60dB attenuation range:
§ 2-Wire Interface Control
§ Power Supply: Dual ±12V
§ Maximum Voltage Across Potentiometers:
§ Standard Resistance Value: 45kW
§ Packages: 16-Pin SOIC
§ Operating Temperature: -40
ORDERING INFORMATION
DS1808Z-050
+85ºC 45kΩ
DS1808Z-050/T&R 16-Pin SOIC -40ºC to
+85ºC 45kΩ
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
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.
www.maxim-ic.com
–1dB per step (12 taps)
–2dB per step (12 taps)
–3dB per step (8 taps)
–90dB low-end attenuation
±12V
16-Pin SOIC -40ºC to
o
C to +85
o
C to +85
o
C
o
C) and is available in the 16-pin SOIC package. The DS1808
Dual Log Digital Potentiometer
1 of 17
PIN ASSIGNMENT
PIN DESCRIPTION
V
V
V
H
L
W
SDA
SCL
/CE
GND
A0, A1, A2
GND
H0
A1
0
A2
A0
W0
CC
B
DD
0
L0
V
, L
0
, H
, W
B
1
1
16-Pin SOIC (150-mil)
1
1
2
3
4
5
6
7
8
- +12V Supply
- -12V Supply (substrate bias)
- 5V Digital Supply
- High-end Terminals
- Low-end Terminals
- Wiper Terminals
- 2-Wire Serial Data Input/Output
- 2-Wire Clock Input
- 2-Wire Interface Enable
- Ground
- Address Pins
14
13
12
11
10
16
15
9
V
V
SCL
SDA
CE
W
H1
L1
DD
CC
DS1808
072601

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DS1808Z-050+T&R Summary of contents

Page 1

... ORDERING INFORMATION DS1808Z-050 16-Pin SOIC -40ºC to +85ºC 45kΩ DS1808Z-050/T&R 16-Pin SOIC -40ºC to +85ºC 45kΩ 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) ...

Page 2

DS1808 BLOCK DIAGRAM Figure 0dB H 0 60dB L 0 >90dB SDA SCL GND PIN DESCRIPTIONS V – Power Supply Terminal. This pin acts as the positive rail. The DS1808 will support positive supply CC voltages ranging ...

Page 3

A0, A1, A2 – Address Inputs. These input pins specify the address of the device when used in a multi- dropped configuration eight individual DS1808s may be addressed on a single 2-wire bus. H0, H1 – These are ...

Page 4

OPERATION The DS1808 is a dual-channel, digitally controlled, logarithmic potentiometer. Each potentiometer has three accessible terminals, which include H multiplexed to the wiper terminal block diagram of the DS1808 is shown in Figure 1. Potentiometer Characteristics The DS1808 ...

Page 5

SERIAL PROTOCOL The following bus protocol has been defined: § 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 ...

Page 6

The master device generates all serial clock pulses and the start and stop conditions. A transfer is ended with a stop condition or with a repeated start condition. Since a repeated start condition is also the beginning of the next ...

Page 7

READING THE DS1808 As shown in Figure 4, the DS1808 provides one read command operation. This operation allows the user to read both potentiometers. To initiate a read operation, the R/W bit of the command/control byte is set to 1. ...

Page 8

Figure 3 Figure 4 Figure 5 Figure ...

Page 9

Figure ...

Page 10

TAP/ATTENUATION TABLE Figure 8 TAP POSITION ATTENUATION (dB ...

Page 11

ABSOLUTE MAXIMUM RATINGS* Voltage on All Pins (except /CE, SDA, SCL, A0, A1, and A2) Relative to Ground Voltage on Pins /CE, SDA, SCL, A0, A1, and A2 Operating Temperature Storage Temperature Soldering Temperature *This is a stress rating only ...

Page 12

ANALOG RESISTOR CHARACTERISTICS PARAMETER SYMBOL End-to-End Resistance Total Resistance Absolute Linearity Relative Linearity Interchannel Matching -3 dB Cutoff f cutoff frequency Output Noise (20Hz to 20kHz, Grounded Input, Tap = -6dB) Total Harmonic THD+N Distortion Interchannel Isolation (20Hz to 20kHz, ...

Page 13

AC ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL SCL Clock Frequency Bus Free Time Between STOP and START Hold Time (repeated) t HD:STA START Condition Low Period of SCL Clock High period of SCL Clock Data Hold Time t HD:DAT Data Set-Up Time ...

Page 14

NOTES : 1. All voltages are referenced to ground. 2. I/O pins of fast mode devices must not obstruct the SDA and SCL lines The value of V should never exceed V DD either ...

Page 15

TYPICAL OPERATING CHARACTERISTICS (V = 12V -12V 5V +25ºC, unless otherwise specified ...

Page 16

TYPICAL OPERATING CHARACTERISTICS (cont 12V -12V 5V +25ºC, unless otherwise specified ...

Page 17

TYPICAL OPERATING CHARACTERISTICS (cont 12V -12V 5V +25ºC, unless otherwise specified ...

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