AD7376ARWZ10-RL Analog Devices Inc, AD7376ARWZ10-RL Datasheet

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AD7376ARWZ10-RL

Manufacturer Part Number
AD7376ARWZ10-RL
Description
IC,Digital Potentiometer,CMOS,SOP,16PIN,PLASTIC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD7376ARWZ10-RL

Taps
128
Resistance (ohms)
10K
Number Of Circuits
1
Temperature Coefficient
300 ppm/°C Typical
Memory Type
Volatile
Interface
SPI, 3-Wire Serial
Voltage - Supply
4.5 V ~ 33 V, ±4.5 V ~ 16.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.300", 7.5mm Width)
Resistance In Ohms
10K
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
EVAL-AD7376EBZ - BOARD EVAL FOR AD7376
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
128 positions
10 kΩ, 50 kΩ, 100 kΩ
20 V to 30 V single-supply operation
±10 V to ±15 V dual-supply operation
3-wire SPI®-compatible serial interface
THD 0.006% typical
Programmable preset
Power shutdown: less than 1 μA
iCMOS™ process technology
APPLICATIONS
High voltage DAC
Programmable power supply
Programmable gain and offset adjustment
Programmable filters, delays
Actuator control
Audio volume control
Mechanical potentiometer replacement
GENERAL DESCRIPTION
The AD7376
digital potentiometers
as a programmable resistor or resistor divider. The AD7376
performs the same electronic adjustment function as mechanical
potentiometers, variable resistors, and trimmers with enhanced
resolution, solid-state reliability, and programmability. With
digital rather than manual control, the AD7376 provides layout
flexibility and allows closed-loop dynamic controllability.
1
2
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
Patent number: 54952455.
The terms digital potentiometer and RDAC are used interchangeably.
1
is one of the few high voltage, high performance
2
on the market. This device can be used
128-Position Digital Potentiometer
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The AD7376 features sleep-mode programmability in shutdown
that can be used to program the preset before device activation,
thus providing an alternative to costly EEPROM solutions.
The AD7376 is available in 14-lead TSSOP and 16-lead wide
body SOIC packages in 10 kΩ, 50 kΩ, and 100 kΩ options. All
parts are guaranteed to operate over the −40°C to +85°C
extended industrial temperature range.
SDO
CLK
SDI
CS
AD7376
FUNCTIONAL BLOCK DIAGRAM
+30 V/±15 V Operation
Q
REGISTER
D
SERIAL
GND
7-BIT
©1997–2009 Analog Devices, Inc. All rights reserved.
CK
7
Figure 1.
LATCH
7-BIT
RS
R
7
SHDN
SHDN
AD7376
www.analog.com
V
A
W
B
V
DD
SS

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AD7376ARWZ10-RL Summary of contents

Page 1

FEATURES 128 positions 10 kΩ, 50 kΩ, 100 kΩ single-supply operation ± ±15 V dual-supply operation 3-wire SPI®-compatible serial interface THD 0.006% typical Programmable preset Power shutdown: less than 1 μA iCMOS™ process ...

Page 2

AD7376 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Electrical Characteristics—10 kΩ Version ................................ 3 Electrical Characteristics—50 kΩ, 100 kΩ Versions ............... 4 ...

Page 3

SPECIFICATIONS ELECTRICAL CHARACTERISTICS—10 kΩ VERSION ±15 V ± 10 Table 1. Parameter DC CHARACTERISTICS— RHEOSTAT MODE 2 Resistor Differential Nonlinearity Resistor Nonlinearity 2 Nominal Resistor ...

Page 4

AD7376 Parameter 6, 9,10 DYNAMIC CHARACTERISTICS Bandwidth −3 dB Total Harmonic Distortion V Settling Time W Resistor Noise Voltage 1 Typical values represent average readings at 25° Resistor position nonlinearity error R-INL is the deviation from an ideal ...

Page 5

Parameter DIGITAL INPUTS AND OUTPUTS Input Logic High Input Logic Low Output Logic High Output Logic Low Input Current 6 Input Capacitance POWER SUPPLIES Power Supply Range Power Supply Range Positive Supply Current Negative Supply Current 8 Power Dissipation Power ...

Page 6

AD7376 3-WIRE DIGITAL INTERFACE Table 4. AD7376 Serial Data-Word Format MSB Data is loaded MSB first. (DATA IN) (DATA OUT SDI CLK 0 1 ...

Page 7

ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 5. Parameter V to GND GND GND Maximum Current I , ...

Page 8

AD7376 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS AD7376 TOP VIEW GND 4 11 (Not to Scale CLK CONNECT Figure 4. ...

Page 9

TYPICAL PERFORMANCE CHARACTERISTICS 0.5 0.4 0.3 +85°C 0.2 +25°C 0.1 0 –40°C –0.1 –0.2 –0.3 –0.4 –0 CODE (Decimal) Figure 6. Resistance Step Position Nonlinearity Error vs. Code 0.5 0.4 0.3 +85°C 0.2 0.1 0 ...

Page 10

AD7376 120 100kΩ 100 80 60 50kΩ 10kΩ 0 –40 – TEMPERATURE (°C) Figure 12. Total Resistance vs. Temperature 350 300 ± 250 200 150 100 ...

Page 11

Figure 18. 100 kΩ Gain vs. Frequency vs. Code 2 1 CH1 5V CH2 5V M2µs A CH1 ...

Page 12

AD7376 THEORY OF OPERATION PROGRAMMING THE VARIABLE RESISTOR Rheostat Operation The part operates in rheostat mode when only two terminals are used as a variable resistor. The unused terminal can be left floating or tied to the W terminal as ...

Page 13

PROGRAMMING THE POTENTIOMETER DIVIDER Voltage Output Operation The digital potentiometer easily generates a voltage divider at Wiper W to Terminal B and Wiper W to Terminal A that is proportional to the input voltage at Terminal A to Terminal B. ...

Page 14

AD7376 DAISY-CHAIN OPERATION SHDN CS SERIAL SDI D Q REGISTER CK RS CLK RS Figure 27. Detailed SDO Output Schematic of the AD7376 Figure 27 shows the details of the serial data output pin (SDO). SDO shifts out the SDI ...

Page 15

LAYOUT AND POWER SUPPLY BIASING good practice to employ a compact, minimum lead-length layout design. The leads to the input should be as direct as possible, with a minimum conductor length. Ground paths should have low resistance ...

Page 16

AD7376 APPLICATIONS INFORMATION HIGH VOLTAGE DAC The AD7376 can be configured as a high voltage DAC as high The circuit is shown in Figure 32. The output is ⎡ ⎤ ⎛ + ⎞ ...

Page 17

AUDIO VOLUME CONTROL Because of its good THD performance and high voltage capability, the AD7376 can be used for digital volume control. If AD7376 is used directly as an audio attenuator or gain amplifier, a large step change in the ...

Page 18

AD7376 OUTLINE DIMENSIONS 4.50 4.40 4.30 PIN 1 1.05 1.00 0.80 0.15 0.05 COPLANARITY 0.10 0.30 (0.0118) 0.10 (0.0039) COPLANARITY 0.10 5.10 5.00 4. 6.40 BSC 1 7 0.65 BSC 1.20 0.20 MAX 0.09 SEATING 0.30 PLANE 0.19 ...

Page 19

... Model kΩ Temperature Range AD7376ARUZ10 3 10 −40°C to +85°C 3 AD7376ARUZ10-R7 10 −40°C to +85°C 3 AD7376ARWZ10 10 −40°C to +85°C 3 AD7376ARWZ10-RL 10 −40°C to +85°C AD7376ARUZ50-REEL7 50 −40°C to +85°C 3 AD7376ARUZ50 50 −40°C to +85°C 3 AD7376ARWZ50 50 −40°C to +85°C 3 AD7376ARUZ100 100 − ...

Page 20

AD7376 NOTES ©1997–2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D01119-0-7/09(C) Rev Page ...

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