ISL28127_12 Datasheet, PDF (20/44 Pages) Intersil Corporation – Providing high-performance solutions for every link in the signal chain

Digital Potentiometers
DCPs Enable Digitally Controlled Analog Signal Processing
DCPs allow for digital flexibility in an analog circuit. DCPs provide a link between the digital and analog domains in
the system, allowing repeatable control and configuration of analog circuitry. This approach is typically more power-
efficient than computationally intensive digital signal processing. For more information, please see AN133.
Digitally Programmable
• Voltage Amplifier
• Filter
• Voltage Reference
• Voltage Regulator
C1
R3
R1
-
V_S
C2
+
V_O
Controls
Center
Frequency
R2
Low Pass Filter
R
V_S
Controls
C
Cutoff
Frequency
Non-Inverting Filter
+
-
V_O
R2
Controls Passband ^R1
Gain
Programmable Filter and Gain Block
Tunable Bandpass Filter IGMF Model
V_CC
Adjust Offset, Gain,
R1 R2
DC Signal Control
V_L
V_H
5V
V_{W -}
GND
+
V_O
-5V
Programmable Inverting Amplifier
Vref
(with trim)
i.e. ISL21009
V_IN
V_OUT
Trim System Errors
V_H
V_O
Temp Trim
GND
R1
V_W
R2
V_L
Trimmable Voltage Reference
VIN (UNREG)
[≥(V_O + IV)]
ERROR
SHUTDOWN
100kΩ
Voltage
Regulator
R
(10kΩ)
Controls Output
Voltage
V_O (Reg)
Programmable Voltage Regulator
128-tap and 256-tap I²C
and SPI Volatile Digital
Potentiometers
Lowest Voltage
Specification
Analog Voltage
Digital Voltage
Low Current
Consumption
Intersil
1.7V to 5.5V
1.2V to 5.5V
2.5µA - 1CH
3µA - 2CH
5µA - 4CH
Competition
1.8V to 5.5V
2.7V to 5.5V
Same as analog
voltage, lowest is
1.8V
Up to 2x more power
consumption
Benefit
Operational when battery
starts draining.
Eliminate level shifter for I²C/
SPI when µC has low voltage
I/O pins.
Drains up to 50% less battery
power.
Smaller Package
Type
Single
Part #
ISL23315,
ISL23415,
ISL23318,
ISL23418
Intersil
µTQFN (2.1x1.6mm)
ISL23325,
Dual
ISL23425,
ISL23328,
ISL23428
µTQFN (2.6x1.8mm)
Quad
ISL23345,
ISL23445,
ISL23348,
ISL23448
QFN (3x4mm)
Competition
Benefit
20% Smaller
SC-70 (2x2.1mm)
QFN (4x4mm)
48% Smaller
QFN (4x4mm)
25% Smaller
Also offered in leaded packages for easy design-in
Volatile: ISL233x5, ISL234x5, ISL233x8, ISL234x8
Vref Adjustment
VREF
RH
_
ISL23415
RW
+
ISL28114
RL
VREF_M
Adjust Both Charge Current and Input
Current on Portable Devices
ISL23315
Or
½ ISL23325
USB
Sys
LTE Sys
DCP 2
Charging Rate Limit
I Path Switching
Battery Charger
DCP1
for USB Input Limit
Bat
GND
ISL23315
Or
½ ISL23325
Battery
20
Intersil Signal Path Products  2012  www.intersil.com