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ISL23415 Datasheet PDF - Intersil Corporation

Part Number ISL23415
Description Low Voltage Digitally Controlled Potentiometer
Manufacturers Intersil Corporation 
Logo Intersil Corporation Logo 

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ISL23415 datasheet, circuit
www.DataSheet.co.kr
Single, Low Voltage Digitally Controlled Potentiometer
(XDCP™)
ISL23415
The ISL23415 is a volatile, low voltage, low noise, low power,
SPI™ 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
SPI 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 ISL23415’s wiper will
always commence at mid-scale (128 tap position).
The low voltage, low power consumption, and small package
of the ISL23415 make it an ideal choice for use in battery
operated equipment. In addition, the ISL23415 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 ISL23415 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
• SPI serial interface
- No additional level translator for low bus supply
- Daisy Chaining of multiple DCP
• Power supply
- VCC = 1.7V to 5.5V analog power supply
- VLOGIC = 1.2V to 5.5V SPI bus/logic power supply
• Wiper resistance: 70Ω 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
• 10kΩ, 50kΩ or 100kΩ 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
• Gain adjustment in battery powered instruments
• Portable medical equipment calibration
10000
8000
6000
4000
2000
00 50 100 150 200 250
TAP POSITION (DECIMAL)
FIGURE 1. FORWARD AND BACKWARD RESISTANCE vs TAP
POSITION, 10k
FIGURE 2. VREF ADJUSTMENT
August 16, 2011
FN7780.1
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 Inc. 2010, 2011. 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.
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ISL23415 equivalent
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ISL23415
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
(Note 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 FN7780.1
August 16, 2011
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Information Total 20 Pages
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