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PDF X9111 Data sheet ( Hoja de datos )
| Número de pieza | X9111 | |
| Descripción | Single Digitally-Controlled Potentiometer | |
| Fabricantes | Xicor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de X9111 (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
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APPLICATION NOTES AND DEVELOPMENT SYSTEM
AVAILABLE
AN99 • AN115 • AN124 •AN133 • AN134 • AN135
Single Supply / Low Power / 1024-tap / SPI bus
Preliminary Information
X9111
Single Digitally-Controlled (XDCP™) Potentiometer
FEATURES
• 1024 Resistor Taps – 10-Bit Resolution
• SPI Serial Interface for write, read, and transfer
operations of the potentiometer
• Wiper Resistance, 40Ω Typical @ 5V
• Four Non-Volatile Data Registers
• Non-Volatile Storage of Multiple Wiper Positions
• Power On Recall. Loads Saved Wiper Position on
Power Up.
• Standby Current < 3µA Max
• VCC: 2.7V to 5.5V Operation
• 100KΩ End to End Resistance
• 100 yr. Data Retention
• Endurance: 100, 000 Data Changes Per Bit Per
Register
• 14-Lead TSSOP, 15-Lead CSP (Chip Scale
Packaging)
• Low Power CMOS
• Single Supply version of the X9110
DESCRIPTION
The X9111 integrates a single digitally controlled
potentiometer (XDCP) on a monolithic CMOS
integrated circuit.
The digital controlled potentiometer is implemented
using 1023 resistive elements in a series array.
Between each element are tap points connected to the
wiper terminal through switches. The position of the
wiper on the array is controlled by the user through the
SPI bus interface. The potentiometer has associated
with it a volatile Wiper Counter Register (WCR) and
four non-volatile Data Registers that can be directly
written to and read by the user. The contents of the
WCR controls the position of the wiper on the resistor
array though the switches. Powerup recalls the
contents of the default data register (DR0) to the WCR.
The XDCP can be used as a three-terminal
potentiometer or as a two terminal variable resistor in
a wide variety of applications including control,
parameter adjustments, and signal processing.
FUNCTIONAL DIAGRAM
VCC
RH
SPI
Bus
Interface
Address
Data
Status
Bus
Interface &
Control
Write
Read
Transfer
Control
Power On Recall
Wiper Counter
Register (WCR)
Data Registers
(DR0-DR3)
Wiper
100KΩ
1024-taps
POT
VSS NC RW RL
REV 1.1.15 5/9/03
www.xicor.com
Characteristics subject to change without notice. 1 of 21
1 page  
X9111 – Preliminary Information
Figure 1. Detailed Potentiometer Block Diagram
Serial Data Path
From Interface
Circuitry
Register 0
(DR0)
10
Register 2
(DR2)
If WCR = 000[HEX] then RW = RL
If WCR = 3FF[HEX] then RW = RH
Register 1
(DR1)
10
Register 3
(DR3)
Serial
Bus
Input
Parallel
Bus
Input
Wiper
Counter
Register
(WCR)
C
O
U
N
T
E
R
D
E
C
O
D
E
RH
RL
RW
These switches are controlled by a Wiper Counter
Register (WCR). The 10-bits of the WCR (WCR[9:0])
are decoded to select, and enable, one of 1024
switches.
Wiper Counter Register (WCR)
The X9111 contains a Wiper Counter Register (see
Table 1) for the XDCP potentiometer. The WCR is
equivalent to a serial-in, parallel-out register/counter
with its outputs decoded to select one of 1024 switches
along its resistor array. The contents of the WCR can
be altered in one of three ways: (1) it may be written
directly by the host via the write Wiper Counter
Register instruction (serial load); (2) it may be written
indirectly by transferring the contents of one of four
associated Data Registers via the XFR Data Register;
(3) it is loaded with the contents of its Data Register
zero (DR0) upon power-up.
The Wiper Counter Register is a volatile register; that
is, its contents are lost when the X9111 is powered-
down. Although the register is automatically loaded
with the value in R0 upon power-up, this may be
different from the value present at power-down. Power-
up guidelines are recommended to ensure proper
loadings of the R0 value into the WCR.
Data Registers (DR3 to DR0)
The potentiometer has four 10-bit non-volatile Data
Registers. These can be read or written directly by the
host. Data can also be transferred between any of the
four Data Registers and the Wiper Counter Register.
All operations changing data in one of the Data
Registers is a nonvolatile operation and will take a
maximum of 10ms.
If the application does not require storage of multiple
settings for the potentiometer, the Data Registers can
be used as regular memory locations for system
parameters or user preference data.
A DR[9:0] is used to store one of the 1024 wiper
position (0 ~1023). Table 2.
Status Register (SR)
This 1-bit status register is used to store the system
status (see Table 3).
WIP: Write In Progress status bit, read only.
– When WIP=1, indicates that high-voltage write cycle
is in progress.
– When WIP=0, indicates that no high-voltage write
cycle is in progress.
REV 1.1.15 5/9/03
www.xicor.com
Characteristics subject to change without notice. 5 of 21
5 Page 
X9111 – Preliminary Information
ABSOLUTE MAXIMUM RATINGS
Temperature under bias.................... –65°C to +135°C
Storage temperature......................... –65°C to +150°C
Voltage on SCK any address input
with respect to VSS ................................. –1V to +7V
∆V = | (VH–VL) | ......................................................5V
Lead temperature (soldering, 10 seconds) ........ 300°C
IW (10 seconds) ..................................................±6mA
RECOMMENDED OPERATING CONDITIONS
Temp
Commercial
Industrial
Min.
0°C
–40°C
Max.
+70°C
+85°C
COMMENT
Stresses above those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only; the functional operation of
the device (at these or any other conditions above
those listed in the operational sections of this
specification) is not implied. Exposure to absolute
maximum rating conditions for extended periods may
affect device reliability.
Device
X9111
X9111-2.7
Supply Voltage (VCC) Limits
5V ±10%
2.7V to 5.5V
ANALOG CHARACTERISTICS (Over recommended industrial operation conditions unless otherwise stated.)
Symbol
RTOTAL
IW
RW
VTERM
CH/CL/CW
Parameter
End to End Resistance
End to End Resistance Tolerance
Power Rating
Wiper Current
Wiper Resistance
Voltage on any RH or RL Pin
Noise
Resolution
Absolute Linearity(1)
Relative Linearity(2)
Temperature Coefficient of RTOTAL
Ratiometric Temp. Coefficient
Potentiometer Capacitancies
Min.
VSS
Limits
Typ. Max.
100
±20
50
±3
40 110
150 300
-120
1.6
5
±1
±1.5
±2.0
±0.5
±0.5
±300
10/10/25
±1.0
20
Units
kΩ
%
mW
mA
Ω
Ω
V
dBV
%
MI(3)
MI(3)
MI(3)
MI(3)
ppm/°C
ppm/°C
pF
Test Conditions
25°C, each pot
Wiper Current = ± 50µA,
VCC = 5V
Wiper Current = ± 50µA,
VCC = 3V
VSS = 0V
Ref: 1V
Rw(n)(actual) – Rw(n)(expected),
where n=8 to 1006
Rw(n)(actual) – Rw(n)(expected)(6)
Rw(m + 1) – [Rw(m) + MI], where
m=8 to 1006
Rw(m + 1) – [Rw(m) + MI](6)
See Macro model
Notes: (1) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage as determined by wiper position when used
as a potentiometer.
(2) Relative linearity is utilized to determine the actual change in voltage between two successive tap positions when used as a
potentiometer. It is a measure of the error in step size.
(3) MI = RTOT / 1023 or (RH – RL) / 1023, single pot
(4) n = 0, 1, 2, …,1023; m =0, 1, 2, …, 1022.
(5) ESD Rating on RH, RL, RW pins is 1.5KV (HBM, 1.0µA leakage maximum), ESD rating on all other pins is 2.0KV.
REV 1.1.15 5/9/03
www.xicor.com
Characteristics subject to change without notice. 11 of 21
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet X9111.PDF ] | |
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