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AD5263 データシート(PDF) 1 Page - Analog Devices

部品番号 AD5263
部品情報  Preliminary Technical Data
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
Logo AD - Analog Devices

AD5263 データシート(HTML) 1 Page - Analog Devices

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PRELIMINARY TECHNICAL DATA
a
Quad +15V 256-Step DigiPOTs
with Pin Selectable SPI / I2C Digital Interface
Preliminary Technical Data
AD5263
08 AUG ’02, REV PrD
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 which may result from its use. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106,
Norwood, MA 02062-9106 U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2002
FEATURES
256 Position
4-Channel (Independently Programmable)
20k, 50k, 200k Ohms
Low Temperature Coefficient 50ppm/
oC
Selectable Digital Interface (3-Wire SPI Compatible or 2-Wire I
2C
Compatible Serial Data Input)
Operating temperature range -40 to 125ºC
+5 to +15V Single-Supply; ±5V Dual-Supply Operation
APPLICATIONS
Mechanical Potentiometer Replacement
Optical Network Laser LED Adjust
Instrumentation: Gain, Offset Adjustment
Stereo Channel Audio Level Control
Automotive Electronics Adjustment
Programmable Voltage to Current Conversion
Programmable Filters, Delays, Time Constants
Line Impedance Matching
Low Resolution DAC Replacement
GENERAL DESCRIPTION
The AD5263 is the industry first quad channel, 256 position,
digital potentiometer
1 selectable digital interface. These devices
perform the same electronic adjustment function as mechanical
potentiometers or variable resistor with enhanced resolution, solid-
state reliability, and superior low temperature coefficient
performance. Each Channel of the AD5263 contains a fixed resistor
with a wiper contact that taps the fixed resistor value at a point
determined by a digital code loaded into the 3 wire SPI or 2-wire
I
2C compatible serial-input register. The resistance between the
wiper and either end point of the fixed resistor varies linearly with
respect to the digital code transferred into the RDAC latch
1. The
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 20k, 50k or
200k
Ω has a nominal temperature coefficient of 50 ppm/°C. Unlike
majority of the digital potentiometers in the market, these devices
can operate up to 15V or ±5V provided proper supply voltages are
furnished.
The AD5263 are available in thin narrow body TSSOP-24. All
parts are guaranteed to operate over the extended automotive
temperature range of -40°C to +125°C.
Functional Block Diagram
A1
W1
B1
A2
W2
B2
A3
W3
B3
A4
W4
B4
RDAC 1
REGISTER
RDAC 2
REGISTER
RDAC 3
REGISTER
RDAC 4
REGISTER
SERIAL INPUT
REGISTER
8
CLK /SCL
SDI / SDA
CS / AD0
V
L
GND
DIS
SDO / O1
NC / O2
V
DD
SHDN
RESB / AD1
V
SS
SPI / I2C
SELECT
LOGIC
ADDRESS
DECODER
AD5263
Figure 1 Normalized Gain Flatness Versus Frequency.


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