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PDF ISL23315 Data sheet ( Hoja de datos )
| Número de pieza | ISL23315 | |
| Descripción | Low Voltage Digitally Controlled Potentiometer | |
| Fabricantes | Intersil | |
| Logotipo |  |
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DATASHEET
Single, Low Voltage Digitally Controlled Potentiometer
(XDCP™)
ISL23315
The ISL23315 is a volatile, low voltage, low noise, low power, I2C
Bus™, 256 Taps, single digitally controlled potentiometer (DCP),
which integrates DCP core, wiper switches and control logic 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 (WR) that can be directly written to and
read by the user. The contents of the WR controls the position
of the wiper. When powered on, the ISL23315’s wiper will
always commence at mid-scale (128 tap position).
The low voltage, low power consumption, and small package
of the ISL23315 make it an ideal choice for use in battery
operated equipment. In addition, the ISL23315 has a VLOGIC
pin allowing down to 1.2V bus operation, independent from the
VCC value. This allows for low logic levels to be connected
directly to the ISL23315 without passing through a voltage
level shifter.
The DCP 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.
Features
• 256 resistor taps
• I2C serial interface
- No additional level translator for low bus supply
- Two address pins allow up to four devices per bus
• Power supply
- VCC = 1.7V to 5.5V analog power supply
- VLOGIC = 1.2V to 5.5V I2C bus/logic power supply
• Wiper resistance: 70 typical @ VCC = 3.3V
• Shutdown Mode - forces the DCP into an end-to-end open
circuit and RW is shorted to RL internally
• Power-on preset to mid-scale (128 tap position)
• Shutdown and standby current <2.8µA max
• DCP terminal voltage from 0V to VCC
• 10k 50kor 100k total resistance
• Extended industrial temperature range: -40°C to +125°C
• 10 Ld MSOP or 10 Ld µTQFN packages
• Pb-free (RoHS compliant)
Applications
• Power supply margining
• RF power amplifier bias compensation
• LCD bias compensation
• Laser diode bias compensation
10000
8000
6000
4000
2000
00 50 100 150 200 250
TAP POSITION (DECIMAL)
FIGURE 1. FORWARD AND BACKWARD RESISTANCE vs TAP
POSITION, 10k DCP
FIGURE 2. VREF ADJUSTMENT
August 12, 2015
FN7778.2
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 2010, 2011, 2015. All Rights Reserved
Intersil (and design) and XDCP are trademarks owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners
1 page  
ISL23315
Analog Specifications VCC = 2.7V to 5.5V, VLOGIC = 1.2V to 5.5V over recommended operating conditions unless otherwise
stated. Boldface limits apply over the operating temperature range, -40°C to +125°C. (Continued)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
(Note 20)
TYP
(Note 8)
MAX
(Note 20)
UNITS
VOLTAGE DIVIDER MODE (0V @ RL; VCC @ RH; measured at RW, unloaded)
INL Integral Non-linearity, Guaranteed
(Note 13) Monotonic
W option
-1.0
±0.5
+1.0
LSB
(Note 9)
U, T option
-0.5
±0.15
+0.5
LSB
(Note 9)
DNL Differential Non-linearity, Guaranteed W option
(Note 12) Monotonic
-1
±0.4
+1
LSB
(Note 9)
U, T option
-0.4
±0.1
+0.4
LSB
(Note 9)
FSerror Full-scale Error
(Note 11)
W option
-3.5 -2
0 LSB
(Note 9)
U, T option
-2 -0.5 0 LSB
(Note 9)
ZSerror Zero-scale Error
(Note 10)
W option
0 2 3.5 LSB
(Note 9)
U, T option
0 0.4 2 LSB
(Note 9)
TCV Ratiometric Temperature Coefficient
(Notes 14)
W option, Wiper Register set to 80 hex
U option, Wiper Register set to 80 hex
8
4
ppm/°C
ppm/°C
T option, Wiper Register set to 80 hex 2.3 ppm/°C
Large Signal Wiper Settling Time
From code 0 to FF hex
300 ns
fcutoff -3dB Cutoff Frequency
Wiper at middle point W option
Wiper at middle point U option
1200
250
kHz
kHz
Wiper at middle point T option
120 kHz
RHEOSTAT MODE (Measurements between RW and RL pins with RH not connected, or between RW and RH with RL not connected)
RINL Integral Non-linearity, Guaranteed
(Note 18) Monotonic
W option; VCC = 2.7V to 5.5V
-2.0 ±1 +2.0 MI
(Note 15)
W option; VCC = 1.7V
10.5
MI
(Note 15)
U, T option; VCC = 2.7V to 5.5V
-1.0
±0.3
+1.0
MI
(Note 15)
U, T option; VCC = 1.7V
2.1 MI
(Note 15)
RDNL Differential Non-linearity, Guaranteed W option; VCC = 2.7V to 5.5V
(Note 17) Monotonic
-1
±0.4
+1
MI
(Note 15)
W option; VCC = 1.7V
±0.6
MI
(Note 15)
U, T option; VCC = 2.7V to 5.5V
-0.5
±0.15
+0.5
MI
(Note 15)
U, T option; VCC = 1.7V
±0.35
MI
(Note 15)
5 FN7778.2
August 12, 2015
5 Page 
ISL23315
Typical Performance Curves (Continued)
0.6
0.30
0.4
0.15
0.2
00
-0.2
-0.4
-0.6
0
50 100 150 200
TAP POSITION (DECIMAL)
FIGURE 9. 10k RINL vs TAP POSITION, VCC = 5V
250
-0.15
-0.30
0
50 100 150 200
TAP POSITION (DECIMAL)
FIGURE 10. 50k RINL vs TAP POSITION, VCC = 5V
250
70
+125°C
60
50 +25°C
40
30
20
-40°C
10
0
0 50 100 150 200 250
TAP POSITION (DECIMAL)
FIGURE 11. 10k WIPER RESISTANCE vs TAP POSITION, VCC = 5V
60
+125°C
50 +25°C
40
30
20 -40°C
10
0
0 50 100 150 200 250
TAP POSITION (DECIMAL)
FIGURE 12. 50k WIPER RESISTANCE vs TAP POSITION, VCC = 5V
300
250
200
150
100
50
0
15 65 115 165 215
TAP POSITION (DECIMAL)
FIGURE 13. 10k TCv vs TAP POSITION
70
60
50
40
30
20
10
0
15 65 115 165 215
TAP POSITION (DECIMAL)
FIGURE 14. 50k TCv vs TAP POSITION
11 FN7778.2
August 12, 2015
11 Page | ||
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| PDF Descargar | [ Datasheet ISL23315.PDF ] | |
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