20

Intersil Signal Path Products  2012  www.intersil.com

Vref

(with trim)

i.e. ISL21009

Trim System Errors

Trimmable Voltage Reference

V

IN

V

W

V

L

V

H

R1

R2

V

O

Temp

Trim

GND

V

OUT

Controls

Center

Frequency

Tunable Bandpass Filter IGMF Model

R1

C1

C2

R2

R3

V

S

V

O

-

+

Controls

Cutoff

Frequency

Controls Passband

Gain

Low Pass Filter

Programmable Filter and Gain Block

R1

R

C

R2

V

S

-

+

V

O

Non-Inverting Filter

Adjust Offset, Gain,

DC Signal Control

Programmable Inverting Amplifier

GND

5V

-5V

-

+

V

CC

V

L

V

O

V

H

V

W

R1

R2

Programmable Voltage Regulator

100kΩ

V

[≥(V

R

(10kΩ)

Voltage

Regulator

ERROR

SHUTDOWN

Controls Output

Voltage

• Voltage Amplifier

• Filter

• Voltage Reference

• Voltage Regulator

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.

Digital Potentiometers

Digitally Programmable

Vref Adjustment

Adjust Both Charge Current and Input

Current on Portable Devices

Volatile: ISL233x5, ISL234x5, ISL233x8, ISL234x8

and SPI Volatile Digital

Potentiometers

Specification

Intersil

Competition

Benefit

1.8V to 5.5V

2.7V to 5.5V

Operational when battery

starts draining.

Digital Voltage

1.2V to 5.5V

Same as analog

voltage, lowest is

1.8V

SPI when µC has low voltage

I/O pins.

Low Current

Consumption

2.5µA - 1CH

3µA - 2CH

5µA - 4CH

Up to 2x more power

consumption

Drains up to 50% less battery

power.

Type

Part #

Intersil

Competition

Benefit

Single

ISL23315,

ISL23415,

ISL23318,

ISL23418

µTQFN (2.1x1.6mm)

SC-70 (2x2.1mm)

20% Smaller

Dual

ISL23325,

ISL23425,

ISL23328,

ISL23428

µTQFN (2.6x1.8mm)

QFN (4x4mm)

48% Smaller

Quad

ISL23345,

ISL23445,

ISL23348,

ISL23448

QFN (3x4mm)

QFN (4x4mm)

25% Smaller

Lowest Voltage

Smaller Package

ISL23415

ISL28114

RH

RW

RL

_

+

Also offered in leaded packages for easy design-in

I Path Switching

Battery Charger

DCP 2

Charging Rate Limit

Bat

GND

Sys

USB

DCP1

for USB Input Limit

LTE Sys

Battery

ISL23315

Or

½ ISL23325

ISL23315

Or

½ ISL23325