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PDF ISL22323 Data sheet ( Hoja de datos )
| Número de pieza | ISL22323 | |
| Descripción | Dual Digitally Controlled Potentiometer | |
| Fabricantes | Intersil | |
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ISL22323
Dual Digitally Controlled Potentiometer (XDCP™)
Data Sheet
August 17, 2015
FN6422.2
Low Noise, Low Power, I2C® Bus,
256 Taps
The ISL22323 integrates two digitally controlled
potentiometers (DCP), control logic and non-volatile memory
on a monolithic CMOS integrated circuit.
The digitally controlled potentiometer is implemented with a
combination of resistor elements and CMOS switches. The
position of the wipers are controlled by the user through the
I2C bus interface. The potentiometer has an associated
volatile Wiper Register (WRi) and a non-volatile Initial Value
Register (IVRi) that can be directly written to and read by the
user. The contents of the WRi control the position of the
corresponding wiper. At power up the device recalls the
contents of the DCP’s IVRi to the correspondent WRi.
The ISL22323 also has 13 general purpose non-volatile
registers that can be used as storage of lookup table for
multiple wiper position or any other valuable information.
The ISL22323 features a dual supply, that is beneficial for
applications requiring a bipolar range for DCP terminals
between V- and VCC.
Each DCP can be used as three-terminal potentiometers or
as two-terminal variable resistors in a wide variety of
applications including control, parameter adjustments, and
signal processing.
Features
• Two potentiometers in one package
• 256 resistor taps
• I2C serial interface
- Three address pins, up to eight devices per bus
• Non-volatile EEPROM storage of wiper position
• 13 General Purpose non-volatile registers
• High reliability
- Endurance: 1,000,000 data changes per bit per register
- Register data retention: 50 years @ T +55°C
• Wiper resistance: 70 typical @ 1mA
• Standby current <4µA max
• Shut-down current <4µA max
• Dual power supply
- VCC = 2.25V to 5.5V
- V- = -2.25V to -5.5V
• 10k 50kor 100k total resistance
• Extended industrial temperature range: -40 to +125°C
• 14 Ld TSSOP or 16 Ld QFN
• Pb-free (RoHS compliant)
Block Diagram
SCL
SDA
A2
A1
A0
I2C
INTERFACE
VCC V-
RH0
POWER UP
INTERFACE,
CONTROL
AND
STATUS
LOGIC
NON-VOLATILE
REGISTERS
WR0
VOLATILE
REGISTER
AND
WIPER
CONTROL
CIRCUITRY
RH1
WR1
VOLATILE
REGISTER
AND
WIPER
CONTROL
CIRCUITRY
GND
RW0 RL0
RW1 RL1
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2007, 2008, 2015. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL22323
Analog Specifications Over recommended operating conditions unless otherwise stated. (Continued)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN TYP MAX
(Note 21) (Note 5) (Note 21) UNIT
TCV (Note 12, Ratiometric Temperature Coefficient DCP register set to 80 hex
19)
±4 ppm/°C
fcutoff
-3dB Cut Off Frequency
(Note 19)
Wiper at midpoint (80hex) W option (10k)
Wiper at midpoint (80hex) U option (50k)
1000
250
kHz
kHz
Wiper at midpoint (80hex) T option (100k)
120
kHz
RESISTOR MODE (Measurements between RWi and RLi with RHi not connected, or between RWi and RHi with RLi not connected)
RINL
Integral Non-linearity
(Note 16)
W option
-3 ±1.5 3
MI
(Note 13)
U, T option
-1 ±0.4 1
MI
(Note 13)
RDNL
Differential Non-linearity
(Note 15)
W option
-1.5 ±0.5 1.5
MI
(Note 13)
U, T option
-0.5 ±0.15 0.5
MI
(Note 13)
Roffset Offset
(Note 14)
W option
0 1 5 MI
(Note 13)
U, T option
0 0.5 2 MI
(Note 13)
RMATCH DCP-to-DCP Matching
(Note 17)
Wipers at the same tap position with the
same terminal voltages
-2
2 MI
(Note 13)
TCR
Resistance Temperature Coefficient DCP register set between 32hex and FF hex
(Notes 18, 19)
±40
ppm/°C
Operating Specifications Over the recommended operating conditions unless otherwise specified.
SYMBOL
ICC1
PARAMETER
VCC Supply Current (Volatile
Write/Read)
TEST CONDITIONS
VCC = 5.5V, fSCL = 400kHz; (for I2C Active,
Read and Volatile Write states only)
VCC = 2.25V, fSCL = 400kHz; (for I2C Active,
Read and Volatile Write states only)
MIN
(Note 21)
TYP MAX
(Note 5) (Note 21)
0.01 0.2
0.005
0.1
IV-1 V- Supply Current (Volatile
Write/Read)
V- = -5.5V,
I2C Active,
VCC = 5.5V, fSCL = 400kHz; (for
Read and Volatile Write states
only)
-0.2
-0.05
V(fo- r=I2-2C.2A5cVt,ivVeC, CRe=a2d.2a5nVd,
fSCL =
Volatile
400kHz;
Write
-0.1
-0.02
states only)
ICC2
VCC Supply Current (Non-volatile
Write/Read)
VI2CCCA=ct5iv.5eV, ,RVe-a=d
5.5V, fSCL = 400kHz; (for
and Non-volatile Write
states only)
1.0 2.0
V(foCrCI2=C2A.2c5tiVv,eV, -R=ea-2d.2a5nVd,
fSCL = 400kHz;
Non-volatile Write
states only)
0.3 1.0
IV-2 V- Supply Current (Non-volatile
Write/Read)
V- = -5.5V,
I2C Active,
VCC = 5.5V, fSCL = 400kHz;
Read and Non-volatile Write
(for
states only)
-2.0
-1.2
V- Supply Current (Non-volatile
Write/Read)
V(fo- r=I2-2C.2A5cVt,ivVeC, CRe=a2d.2a5nVd,
fSCL = 400kHz;
Non-volatile Write
states only)
-1.0
-0.4
UNIT
mA
mA
mA
mA
mA
mA
mA
mA
5 FN6422.2
August 17, 2015
5 Page 
ISL22323
Typical Performance Curves (Continued)
1.60
1.20
10k
0.80
0.40
5.5V
0.00
2.25V
50k
-0.40
-40 0 40 80
TEMPERATURE (ºC)
FIGURE 9. END TO END RTOTAL % CHANGE vs
TEMPERATURE
120
200
160
10k
120
80
50k
40
0
16
66 116 166 216 266
TAP POSITION (DECIMAL)
FIGURE 10. TC FOR VOLTAGE DIVIDER MODE IN ppm
500
400 10k
300
200
50k
100
0
16 66 116 166 216
TAP POSITION (DECIMAL)
FIGURE 11. TC FOR RHEOSTAT MODE IN ppm
INPUT
OUTPUT
WIPER AT MID POINT (POSITION 80h)
RTOTAL = 10k
FIGURE 12. FREQUENCY RESPONSE (1MHz)
SCL
WIPER
CS
WIPER UNLOADED,
MOVEMENT FROM 0h to FFh
FIGURE 13. MIDSCALE GLITCH, CODE 7Fh TO 80h
11
FIGURE 14. LARGE SIGNAL SETTLING TIME
FN6422.2
August 17, 2015
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet ISL22323.PDF ] | |
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