X9430WV24I-2.7 INTERSIL [Intersil Corporation], X9430WV24I-2.7 Datasheet

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X9430WV24I-2.7

Manufacturer Part Number
X9430WV24I-2.7
Description
Dual Digitally Controlled Potentiometer (XDCP) with Operational Amplifier
Manufacturer
INTERSIL [Intersil Corporation]
Datasheet
Dual Digitally Controlled Potentiometer
(XDCP™) with Operational Amplifier
FEATURES
• Two CMOS voltage operational amplifiers
• Two digitally controlled potentiometers
• Can be combined or used separately
• Amplifiers
• Digitally controlled potentiometer
BLOCK DIAGRAM
—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
CC
total
PRELIMINARY
= 2.7V to 5.5V
= 10kΩ
SCK
®
SO
CS
A1
A0
SI
1
HOLD
WP
Data Sheet
Control and
Memory
V
V
CC
SS
WCR0
WCR1
1-888-INTERSIL or 1-888-352-6832
R
R
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved
W0
W1
R
R
H0
L1
R
R
L0
H1
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 resis-
tor nodes in the series string. The wiper position is
saved in the on board E2 memory to allow for nonvola-
tile restoration of the wiper position.
A wide variety of applications can be implemented
using the potentiometers and the amplifiers. A typical
application is to implement the amplifier as a wiper
buffer in circuits that use the potentiometer as a voltage
reference. The potentiometer can also be combined
with the amplifier yielding a digitally programmable gain
amplifier or programmable current source.
March 11, 2005
All other trademarks mentioned are the property of their respective owners.
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
+
+
V-
V+
V
V
V
V
V
V
Programmable Analog
OUT0
OUT1
NI0
INV0
NI1
INV1
X9430
FN8198.0

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X9430WV24I-2.7 Summary of contents

Page 1

Data Sheet PRELIMINARY Dual Digitally Controlled Potentiometer (XDCP™) with Operational Amplifier 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 ...

Page 2

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 the serial clock. Serial ...

Page 3

PIN CONFIGURATION SOIC X9430 ...

Page 4

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 fixed terminals of a ...

Page 5

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 A pins. The X9430 compares the serial data stream with the address ...

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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

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 poten- tiometer is associated with a wiper counter register (WCR), and four data ...

Page 8

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 the Wiper Counter Register ...

Page 9

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 Transfer Wiper Counter ...

Page 10

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 Voltage on V+ (referenced ........................+7V SS Voltage on ...

Page 11

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 Common mode rejection ratio ...

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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 Input leakage current LI ...

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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, SCK, HOLD and CS ...

Page 14

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 (increment/decrement instruction) WRID SYMBOL ...

Page 15

Output Timing CS SCK t V MSB SO ADDR SI Hold Timing CS SCK HOLD DCP Timing (for All Load Instructions) CS SCK MSB SI VWx High Impedance SO 15 X9430 ... t HO ... t ...

Page 16

DCP Timing (for Increment/Decrement Instruction) CS SCK VWx ADDR SI High Impedance SO Write Protect and Device Address Pins Timing X9430 ... t WRID ... ... Inc/Dec Inc/Dec (Any Instruction WPASU WPAH FN8198.0 ...

Page 17

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

Page 18

Application Circuits (continued) Attenuator – All R = 10kΩ -1/2 ≤ G ≤ +1/2 Inverting Amplifier ...

Page 19

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 (IN PARENTHESES IN MILLIMETERS) ...

Page 20

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) 20 X9430 24-Lead Plastic, TSSOP ...

Page 21

Ordering Information X9430 Device All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make ...

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