X9430WV24I XICOR [Xicor Inc.], X9430WV24I Datasheet

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X9430WV24I

Manufacturer Part Number
X9430WV24I
Description
Manufacturer
XICOR [Xicor Inc.]
Datasheet
Preliminary Information
BLOCK DIAGRAM
Programmable Analog
FEATURES
• Two CMOS voltage operational amplifiers
• Two digitally controlled potentiometers
• Can be combined or used separately
• Amplifiers
• Digitally controlled potentiometer
REV 1.0 6/20/00
—Low voltage operation
—V+/V- = ±2.7V to ±5.5V
—Rail-to-rail CMOS performance
—1MHz gain bandwidth product
—Dual 64 tap potentiometers
—R
—SPI serial interface
—V
Dual Digitally Controlled Potentiometer (XDCP
CC
total
= 2.7V to 5.5V
= 10k¾
SCK
SO
CS
A1
A0
SI
HOLD
WP
Control and
Memory
V
V
CC
SS
WCR0
WCR1
www.xicor.com
R
R
X9430
W0
W1
R
R
H0
L1
DESCRIPTION
The X9430 is a monolithic CMOS IC that incorporates
two operational amplifiers and two nonvolatile digitally
controlled potentiometers. The amplifiers are CMOS
differential input voltage operational amplifiers with
near rail-to-rail outputs. All pins for the two amplifiers
are brought out of the package to allow combining
them with the potentiometers or using them as com-
plete stand-alone amplifiers.
The digitally controlled potentiometers consist of a
series string of 63 polycrystalline resistors that behave
as standard integrated circuit resistors. The SPI serial
port, common to both pots, allows the user to program
the connection of the wiper output to any of the resistor
nodes in the series string. The wiper position is saved
in the on board E2 memory to allow for nonvolatile res-
toration of the wiper position.
A wide variety of applications can be implemented
using the potentiometers and the amplifiers. A typical appli-
cation is to implement the amplifier as a wiper buffer in
circuits that use the potentiometer as a voltage refer-
ence. The potentiometer can also be combined with
the amplifier yielding a digitally programmable gain
amplifier or programmable current source.
R
R
L0
H1
) with Operational Amplifier
+
+
V–
V+
Characteristics subject to change without notice.
V
V
V
V
V
V
NI0
OUT0
INV0
NI1
OUT1
INV1
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X9430WV24I Summary of contents

Page 1

Preliminary Information Programmable Analog Dual Digitally Controlled Potentiometer (XDCP FEATURES • Two CMOS voltage operational amplifiers • Two digitally controlled potentiometers • Can be combined or used separately • Amplifiers —Low voltage operation —V+/V- = ±2.7V to ±5.5V —Rail-to-rail CMOS ...

Page 2

X9430 – Preliminary Information PIN DESCRIPTIONS Host Interface Pins Serial Output (SO push/pull serial data output pin. During a read cycle, data is shifted out on this pin. Data is clocked out by the falling edge of ...

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X9430 – Preliminary Information PIN CONFIGURATION SOIC X9430 ...

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X9430 – Preliminary Information Potentiometer/Array Description The X9430 is comprised of two resistor arrays and two operational amplifiers. Each array contains 63 discrete resistive segments that are connected in series. The physical ends of each array are equivalent to the ...

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X9430 – Preliminary Information The two least significant bits in the ID byte select one of four devices on the bus. The physical device address is defined by the state of the compares the serial data ...

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X9430 – Preliminary Information Figure 3. Two Byte Command Sequence CS SCK Figure 4. Three-Byte Command Sequence (Write) CS SCK Figure 5. Three-Byte Command Sequence(Read) CS SCK ...

Page 7

X9430 – Preliminary Information Figure 7. Increment/Decrement Timing SCK INC/DEC CMD Issued REGISTER OPERATION Both digitally controlled potentiometers share the serial interface and share a common architecture. Each potentiometer is associated with a wiper counter regis- ter ...

Page 8

X9430 – Preliminary Information REGISTER DESCRIPTIONS AND MEMORY MAP Memory Map WCRO DR0 DR1 DR2 DR3 Instruction Format Notes: (1) “A1 ~ A0”: stands for the device addresses sent by the master. (2) WPx refers to wiper position data in ...

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X9430 – Preliminary Information Transfer Data Register (DR) to Wiper Counter Register (WCR) Transfer the contents of the Register pointed device type device CS identifier addresses Falling A A Edge ...

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X9430 – Preliminary Information ABSOLUTE MAXIMUM RATINGS Temperature under bias ....................–65°C to +135°C Storage temperature .........................–65°C to +150°C Voltage on SCK, SCL or any address input with respect to V Voltage on V+ (referenced Voltage on V- ...

Page 11

X9430 – Preliminary Information AMPLIFIER ELECTRICAL CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.) Symbol Parameter V Input Offset Voltage OS TC Input Offset Voltage Temp. VOS Coefficient I Input bias current B I Input offset current OS CMRR ...

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X9430 – Preliminary Information POTENTIOMETER D.C. OPERATING CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.) Symbol Parameter I V supply current (active) CC1 supply current (nonvolatile CC2 CC write current (standby ...

Page 13

X9430 – Preliminary Information AC TIMING Symbol f SSI/SPI clock frequency SCK t SSI/SPI clock cycle time CYC t SSI/SPI clock high time WH t SSI/SPI clock low time WL t Lead time LEAD t Lag time LAG t SI, ...

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X9430 – Preliminary Information DCP Timing Symbol t Wiper response time after the third (last) power supply is stable WRPO t Wiper response time after instruction issued (all load instructions) WRL t Wiper response time from an active SCL/SCK edge ...

Page 15

X9430 – Preliminary Information Output Timing CS SCK t MSB SO ADDR SI Hold Timing CS SCK HOLD DCP Timing (for All Load Instructions) CS SCK MSB SI VWx High Impedance SO REV 1.0 6/20/00 t ...

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X9430 – Preliminary Information DCP Timing (for Increment/Decrement Instruction) CS SCK VWx SI ADDR High Impedance SO Write Protect and Device Address Pins Timing REV 1.0 6/20/00 ... t WRID ... ... Inc/Dec Inc/Dec (Any Instruction) ...

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X9430 – Preliminary Information APPLICATIONS INFORMATION Basic Configurations of Electronic Potentiometers V R Three terminal Potentiometer; Variable voltage divider Application Circuits Noninverting Amplifier – (1 ...

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X9430 – Preliminary Information Application Circuits (continued) Attenuator – All -1/2 ð G ð +1/2 Inverting Amplifier ...

Page 19

X9430 – Preliminary Information PACKAGING INFORMATION 24-Lead Plastic Small Outline Gull Wing Package Type S Pin 1 Index Pin 1 (4X) 7° 0.050 (1.27) 0.010 (0.25) 0.020 (0.50) 0° – 8° 0.015 (0.40) 0.050 (1.27) NOTE: ALL DIMENSIONS IN INCHES ...

Page 20

X9430 – Preliminary Information PACKAGING INFORMATION .026 (.65) BSC .303 (7.70) .311 (7.90) .0075 (.19) .0118 (.30) 0°–8° .020 (.50) .030 (.75) Detail A (20X) See Detail “A” NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) REV 1.0 6/20/00 ...

Page 21

X9430 – Preliminary Information Ordering Information X9430 Device LIMITED WARRANTY Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty, express, statutory, implied, or ...

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