IC POT DIG QUAD 1K 8BIT 24TSSOP

AD8403ARU1-REEL

Manufacturer Part NumberAD8403ARU1-REEL
DescriptionIC POT DIG QUAD 1K 8BIT 24TSSOP
ManufacturerAnalog Devices Inc
AD8403ARU1-REEL datasheet
 


Specifications of AD8403ARU1-REEL

Rohs StatusRoHS non-compliantTaps256
Resistance (ohms)1KNumber Of Circuits4
Temperature Coefficient500 ppm/°C TypicalMemory TypeVolatile
InterfaceSPI, 3-Wire SerialVoltage - Supply2.7 V ~ 5.5 V
Operating Temperature-40°C ~ 125°CMounting TypeSurface Mount
Package / Case24-TSSOPResistance In Ohms1.00K
For Use WithAD8403EVAL - BOARD EVAL FOR AD8403  
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Page 1/32

Download datasheet (604Kb)Embed
Next
FEATURES
256-position variable resistance device
Replaces 1, 2, or 4 potentiometers
1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
Power shutdown—less than 5 μA
3-wire,SPI-compatible serial data input
10 MHz update data loading rate
2.7 V to 5.5 V single-supply operation
Qualified for automotive applications
APPLICATIONS
Mechanical potentiometer replacement
Programmable filters, delays, time constants
Volume control, panning
Line impedance matching
Power supply adjustment
GENERAL DESCRIPTION
The AD8400/AD8402/AD8403 provide a single-, dual-, or
quad-channel, 256-position, digitally controlled variable resistor
1
(VR) device.
These devices perform the same electronic adjust-
ment function as a mechanical potentiometer or variable
resistor. The AD8400 contains a single variable resistor in the
compact SOIC-8 package. The AD8402 contains two independent
variable resistors in space-saving SOIC-14 surface-mount
packages. The AD8403 contains four independent variable
resistors in 24-lead PDIP, SOIC, and TSSOP packages. Each
part contains a fixed resistor with a wiper contact that taps the
fixed resistor value at a point determined by the digital code
loaded into the controlling serial input register. The resistance
between the wiper and either endpoint of the fixed resistor
varies linearly with respect to the digital code transferred into
the VR latch. Each variable resistor offers a completely
programmable value of resistance between the A terminal and
the wiper or the B terminal and the wiper. The fixed A-to-B
terminal resistance of 1 kΩ, 10 kΩ, 50 kΩ, or 100 kΩ has a ±1%
channel-to-channel matching tolerance with a nominal
temperature coefficient of 500 ppm/°C. A unique switching
circuit minimizes the high glitch inherent in traditional
switched resistor designs, avoiding any make-before-break
or break-before-make operation.
1
The terms digital potentiometer, VR, and RDAC are used interchangeably.
Rev. E
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.
V
DD
DGND
SDI
CLK
CS
100
75
50
25
0
0
(continued on Page 3)
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
1-/2-/4-Channel
Digital Potentiometers
AD8400/AD8402/AD8403
FUNCTIONAL BLOCK DIAGRAM
RDAC1
AD8403
8
8-BIT
LATCH
DAC
CK RS
SELECT
SHDN
1
2
RDAC2
8
8-BIT
3
LATCH
4
A1, A0
CK RS
SHDN
2
10-BIT
RDAC3
8
8
SERIAL
8-BIT
LATCH
LATCH
D
CK RS
SHDN
CK
Q
RS
RDAC4
8
8-BIT
LATCH
CK RS
SHDN
SDO
RS
SHDN
Figure 1.
R
R
WA
WB
64
128
192
CODE (Decimal)
Figure 2. R
and R
vs. Code
WA
WB
www.analog.com
© 2010 Analog Devices, Inc. All rights reserved.
A1
W1
B1
AGND1
A2
W2
B2
AGND2
A3
W3
B3
AGND3
A4
W4
B4
AGND4
255

AD8403ARU1-REEL Summary of contents

  • Page 1

    FEATURES 256-position variable resistance device Replaces potentiometers 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ Power shutdown—less than 5 μA 3-wire,SPI-compatible serial data input 10 MHz update data loading rate 2 5.5 V single-supply ...

  • Page 2

    AD8400/AD8402/AD8403 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 4 Electrical Characteristics—10 kΩ Version ................................ 4 Electrical Characteristics—50 kΩ and 100 kΩ Versions ......... ...

  • Page 3

    GENERAL DESCRIPTION (continued from Page 1) Each VR has its own VR latch that holds its programmed resistance value. These VR latches are updated from an SPI- compatible, serial-to-parallel shift register that is loaded from a standard 3-wire, serial-input digital ...

  • Page 4

    AD8400/AD8402/AD8403 SPECIFICATIONS ELECTRICAL CHARACTERISTICS—10 KΩ VERSION ± 10 ± 10 Table 1. Parameter Symbol DC CHARACTERISTICS RHEOSTAT MODE (Specifications Apply to All VRs) 2 Resistor Differential NL ...

  • Page 5

    Parameter Symbol 6, 10 DYNAMIC CHARACTERISTICS Bandwidth −3 dB BW_10 K Total Harmonic Distortion THD V Settling Time Resistor Noise Voltage e NWB 11 Crosstalk Typical represents average readings at 25°C and V 2 ...

  • Page 6

    AD8400/AD8402/AD8403 ELECTRICAL CHARACTERISTICS—50 KΩ AND 100 KΩ VERSIONS ± 10 ± 10 Table 2. Parameter Symbol DC CHARACTERISTICS RHEOSTAT MODE (Specifications Apply to All VRs) 2 Resistor ...

  • Page 7

    Parameter Symbol 6, 10 DYNAMIC CHARACTERISTICS Bandwidth −3 dB BW_50 K BW_100 K Total Harmonic Distortion THD V Settling Time t _50 _100 K S Resistor Noise Voltage e NWB e NWB 11 Crosstalk C T ...

  • Page 8

    AD8400/AD8402/AD8403 ELECTRICAL CHARACTERISTICS—1 KΩ VERSION ± 10 ± 10 Table 3. Parameter DC CHARACTERISTICS RHEOSTAT MODE (Specifications Apply to All VRs) 2 Resistor Differential NL 2 Resistor ...

  • Page 9

    Parameter 6, 10 DYNAMIC CHARACTERISTICS Bandwidth −3 dB Total Harmonic Distortion V Settling Time W Resistor Noise Voltage 11 Crosstalk 1 Typicals represent average readings at 25°C and V 2 Resistor position nonlinearity error R-INL is the deviation from an ...

  • Page 10

    AD8400/AD8402/AD8403 ELECTRICAL CHARACTERISTICS—ALL VERSIONS ± 10 ± 10 Table 4. Parameter SWITCHING CHARACTERISTICS 2, 3 Input Clock Pulse Width Data Setup Time Data Hold Time 4 CLK ...

  • Page 11

    ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 5. Parameter V to GND GND Maximum Current Pulsed Continuous (R ≤ ...

  • Page 12

    AD8400/AD8402/AD8403 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS AD8400 GND TOP VIEW (Not to Scale) SDI 4 CLK 5 Figure 6. AD8400 Pin Configuration Table 7. AD8400 Pin Function Descriptions ...

  • Page 13

    Table 9. AD8403 Pin Function Descriptions Pin No. Mnemonic Description 1 AGND2 Analog Ground Terminal B RDAC Terminal A RDAC Wiper RDAC 2, Addr = 01 5 AGND4 Analog Ground 4. ...

  • Page 14

    AD8400/AD8402/AD8403 TYPICAL PERFORMANCE CHARACTERISTICS 10kΩ 128 CODE (Decimal) Figure 9. Wiper to End Terminal Resistance vs. Code 5 80 ...

  • Page 15

    SS = 184 UNITS 25° 40.0 42.5 45.0 47.5 50.0 52.5 55.0 57.5 60.0 62.5 WIPER RESISTANCE (Ω) Figure 15. 100 kΩ Wiper-Contact-Resistance Histogram 10 R (END-TO-END) ...

  • Page 16

    AD8400/AD8402/AD8403 0.75 CODE = 158 UNITS 0.50 AVERAGE + 2 SIGMA 0.25 0 –0.25 AVERAGE – 2 SIGMA –0.50 –0.75 0 100 200 300 HOURS OF OPERATION AT 150°C Figure 21. Long-Term ...

  • Page 17

    CODE = 25° 50kΩ 100kΩ 10 100 1k 10k FREQUENCY (Hz) Figure 27. Normalized Gain Flatness vs. Frequency (See Figure 43 25° ...

  • Page 18

    AD8400/AD8402/AD8403 0 –10 –20 0 –45 – 25°C A WIPER SET AT HALF-SCALE 80 H 100k 200k 400k 1M FREQUENCY (Hz) Figure 33. 1 kΩ Gain and Phase vs. Frequency 100 V = ...

  • Page 19

    TEST CIRCUITS DUT 1LSB = V+/256 Figure 37. Potentiometer Divider Nonlinearity Error (INL, DNL) NO CONNECT DUT Figure 38. Resistor Position Nonlinearity Error (Rheostat ...

  • Page 20

    AD8400/AD8402/AD8403 THEORY OF OPERATION The AD8400/AD8402/AD8403 provide a single, dual, and quad channel, 256-position, digitally controlled variable resistor (VR) device. Changing the programmed VR setting is accomplished by clocking in a 10-bit serial data-word into the SDI (Serial Data Input) ...

  • Page 21

    Like a mechanical potentiometer, RDAC is symmetrical. The resistance between the Wiper W and Terminal A also produces a digitally controlled complementary resistance, R these terminals are used, the B terminal can be tied to the wiper or left floating. ...

  • Page 22

    AD8400/AD8402/AD8403 CS CLK D7 EN RDAC LATCH NO. 1 ADDR R A1 DEC D0 DO SDO A0 D7 SER AD8403 REG D7 SDI DI D0 RDAC LATCH NO SHDN DGND RS Figure 48. AD8403 Block Diagram ...

  • Page 23

    DIGITAL PINS Figure 51. Equivalent ESD Protection Circuits 20 Ω Figure 52. Equivalent ESD Protection Circuit (Analog Pins) RDAC 10kΩ 120pF 90.4pF (DW/256) + 30pF C = ...

  • Page 24

    AD8400/AD8402/AD8403 APPLICATIONS The digital potentiometer (RDAC) allows many of the applica- tions of a mechanical potentiometer to be replaced by a solid- state solution offering compact size and freedom from vibration, shock, and open contact problems encountered in hostile environments. ...

  • Page 25

    FREQUENCY (Hz) Figure 56. Programmed Center Frequency Band-Pass Response –20 –40 –60 –80 100k 200k 20 Figure 57. Programmed Amplitude Band-Pass Response Rev. ...

  • Page 26

    AD8400/AD8402/AD8403 OUTLINE DIMENSIONS 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 0.210 (5.33) MAX 0.150 (3.81) 0.130 (3.30) 0.110 (2.79) 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) 5.00 (0.1968) 4.80 (0.1890 6.20 (0.2441) 4.00 (0.1574) 1 5.80 (0.2284) 3.80 (0.1497) 4 1.27 ...

  • Page 27

    BSC 1.75 (0.0689) 0.25 (0.0098) 1.35 (0.0531) 0.10 (0.0039) COPLANARITY SEATING 0.51 (0.0201) 0.10 PLANE 0.31 (0.0122) COMPLIANT TO JEDEC STANDARDS MS-012-AB ...

  • Page 28

    AD8400/AD8402/AD8403 24 0.210 (5.33) MAX 0.150 (3.81) 0.130 (3.30) 0.115 (2.92) 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN ...

  • Page 29

    BSC 1 12 PIN 1 0.65 1.20 BSC MAX 0.15 0.05 0.30 0.20 SEATING 0.19 PLANE 0.09 0.10 COPLANARITY COMPLIANT TO JEDEC STANDARDS MO-153-AD Figure 64. 24-Lead Thin Shrink Small Outline ...

  • Page 30

    AD8400/AD8402/AD8403 ORDERING GUIDE Number Model Channels AD8400AR10 1 AD8400AR10-REEL 1 AD8400ARZ10 1 AD8400ARZ10-REEL 1 AD8400AR50 1 AD8400AR50-REEL 1 AD8400ARZ50 1 AD8400ARZ50-REEL 1 AD8400AR100 1 AD8400AR100-REEL 1 AD8400ARZ100 1 AD8400ARZ100-REEL 1 AD8400AR1 1 AD8400AR1-REEL 1 AD8400ARZ1 1 ...

  • Page 31

    ... AD8403ARUZ100 4 AD8403ARUZ100-REEL 4 AD8403ARZ100 4 AD8403ARZ100-REEL 4 AD8403AR1 4 AD8403AR1-REEL 4 AD8403ARU1 4 AD8403ARU1-REEL 4 AD8403ARUZ1 4 AD8403ARUZ1-REEL 4 AD8403ARZ1 4 AD8403ARZ1-REEL 4 AD8403WARZ50-REEL 4 EVAL-AD8403SDZ 1 Non-lead-free parts have date codes in the format of either YWW or YYWW, and lead-free parts have date codes in the format of #YWW, where Y/YY is the year of production and WW is the work week. For example, a non-lead-free part manufactured in the 30 lead-free part has the date code of #530 ...

  • Page 32

    AD8400/AD8402/AD8403 NOTES © 2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D01092-0-7/10(E) Rev Page ...