intersil ISL28276, ISL28476 DATA SHEET

®

ISL28276, ISL28476

Data Sheet April 20, 2007

Dual and Quad Precision Micropower
Single Supply Rail-to-Rail Input and
Output Precision Op Amps

The ISL28276 and ISL28476 are Dual and Quad channel
micropower precision operational amplifier optimized for
single supply operation at 5V and can operate down to 2.4V.
For equivalent performance in a single channel op-amp
reference EL8176.

The ISL28276 and ISL28476 feature an Input Range
Enhancement Circuit (IREC) which enables both parts to
maintain CMRR performance for input voltages equal to the
positive and negative supply rails. The input signal is
capable of swinging 0.5V above a 5.0V supply (0.25V for a

2.4V supply) and to within 10mV from ground. The output
operation is rail to rail.

The both parts draw minimal supply current while meeting
excellent DC-accuracy, AC-performance, noise and output
drive specifications. Offset current, voltage and current
noise, slew rate, and gain-bandwidth product are all two to
ten times better than other micropower op-amps with
equivalent supply current ratings.

The ISL28276 and ISL28476 can be operated from one
lithium cell or two Ni-Cd batteries. The input range includes
both positive and negative rail.

Ordering Information

FN6301.1

Features

• 60µA supply current per channel

• 100µV max offset voltage

• 500pA input bias current

• 400kHz gain-bandwidth product

• 115dB PSRR and CMRR

• Single supply operation down to 2.4V

• Input is capable of swinging above V+ and within 10mV of
Ground

• Rail-to-rail output

• Output sources 31mA load current

• Pb-free plus anneal available (RoHS compliant)

Applications

• Battery- or solar-powered systems

• 4mA to 25mA current loops

• Handheld consumer products

• Medical devices

• Thermocouple amplifiers

• Photodiode pre-amps

• pH probe amplifiers

PART NUMBER

(Note)

ISL28276IAZ 28276 IAZ 97/Tube 16 Ld QSOP MDP0040
ISL28276IAZ-T7 28276 IAZ 7”

Coming Soon

ISL28476FAZ

Coming Soon

ISL28476FAZ-T7

NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.

PART

MARKING

28476 FAZ 97/Tube 16 Ld QSOP MDP0040

28476 FAZ 7”

TAPE &

REEL

(1k pcs)

(1k pcs)

1

PACKAGE

(Pb-Free)

16 Ld QSOP MDP0040

16 Ld QSOP MDP0040

PKG.

DWG. #

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

| Intersil (and design) is a registered trademark of Intersil Americas Inc.

Copyright Intersil Americas Inc. 2006, 2007. All Rights Reserved

All other trademarks mentioned are the property of their respective owners.

Pinouts

ISL28276

(16 LD QSOP)

TOP VIEW

ISL28276, ISL28476

ISL28476

(16 LD QSOP)

TOP VIEW

NC

1

NC

2

OUT_A

3

IN-_A

4

IN+_A IN+_B

5

EN

_A

6

V-

7

NC NC

8 9

+

-

+

NC

16

V+

15

OUT_B

14

­IN-_B

13

12

EN_B

11

NC

10

OUT_A

1

IN-_A

2

IN+_A

3

V+

4

IN+_B IN+_C

5

IN-_B

OUT_B

NC NC

-

6

7

8 9

+

-

+

-

+

+

OUT_D

16

IN-_D

15

IN+_D

14

V-

13

12

­IN-_C

11

OUT_C

10

2

FN6301.1

April 20, 2007

ISL28276, ISL28476

Absolute Maximum Ratings (T

Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.5V, 1V/μs

Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA

Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5V

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . V

ESD tolerance, Human Body Model . . . . . . . . . . . . . . . . . . . . . .3kV

ESD tolerance, Machine Model . . . . . . . . . . . . . . . . . . . . . . . . .300V

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: TJ = TC = T

Operating Junction

Electrical Specifications V

= +25°C) Thermal Information

A

Output Short-Circuit Duration . . . . . . . . . . . . . . . . . . . . . . .Indefinite

Ambient Operating Temperature Range . . . . . . . . .- 40°C to +125°C

Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C

- 0.5V to V+ + 0.5V

-

Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . +125°C

Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

A

= 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = +25°C unless otherwise specified.

+

Boldface limits apply over the operating temperature range, -40°C to +125°C

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

V

OS

ΔV

OS

------------------

ΔTi me

ΔV

OS

--------------- -

ΔT

I

OS

Input Offset Voltage -100

-150

20 100

150

µV

Long Term Input Offset Voltage Stability 1.2 µV/Mo

Input Offset Drift vs Temperature 0.3 µV/°C

Input Offset Current 0.25 1.3

nA

2.0

I

B

e

N

Input Bias Current -2

-2.5

0.5 2

2.5

Input Noise Voltage Peak-to-Peak f = 0.1Hz to 10Hz 1 µV

nA

P-P

Input Noise Voltage Density fO = 1kHz 25 nV/√Hz

i

N

Input Noise Current Density fO = 1kHz 0.1 pA/√Hz
CMIR Input Voltage Range Guaranteed by CMRR test 05V
CMRR Common-Mode Rejection Ratio V

PSRR Power Supply Rejection Ratio V

= 0V to 5V 90

CM

= 2.4V to 5V 90

+

80

115 dB

115 dB

80

A

V

VOL

OUT

Large Signal Voltage Gain VO = 0.5V to 4.5V, RL = 100kΩ 350

350

V

= 0.5V to 4.5V, RL = 1kΩ 25 V/mV

O

Maximum Output Voltage Swing Output low, RL = 100kΩ 3630mV

550 V/mV

Output low, R

= 1kΩ 130 175

L

mV

225

Output high, R

= 100kΩ 4.990

L

4.996 V

4.97

Output high, R

SR+ Positive Slew Rate 0.13

SR- Negative Slew Rate 0.10

= 1kΩ 4.800

L

4.750

0.10

0.09

4.880 V

0.17 0.20

V/µs

0.25

0.13 0.17

V/µs

0.19

GBW Gain Bandwidth Product 400 kHz

3

FN6301.1

April 20, 2007

ISL28276, ISL28476

Electrical Specifications V

= 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = +25°C unless otherwise specified.

+

Boldface limits apply over the operating temperature range, -40°C to +125°C (Continued)

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

I

S,ON

I

S,OFF

I

S,ON

I

S,OFF

I

+ Short Circuit Sourcing Capability RL = 10Ω 29

SC

Supply Current, Enabled ISL28276 all channels enabled. 120 156

175

Supply Current, Disabled 479µA

Supply Current, Enabled ISL28476 all channels enabled. 240 312

350

Supply Current, Disabled 81418µA

31 mA

23

I

- Short Circuit Sinking Capability RL = 10Ω 24

SC

V
V
V
I

ENH

I

ENL

S
INH
INL

Minimum Supply Voltage 2.4 V

Enable Pin High Level 2 V

Enable Pin Low Level 0.8 V

Enable Pin Input Current VEN = 5V 0.7 1.3

Enable Pin Input Current VEN = 0V -0.1 0 +0.1 µA

19

26 mA

1.5

µA

µA

µA

Typical Performance Curves

8

4

0

GAIN (dB)

AV = 1
R

= 10kΩ

-4

L

= 2.7pF

C

L

= 100Ω

R

F

= OPEN

R

G

-8
100 10k 100k 10M

1k 1M

VS = ±1.25V

VS = ±2.5V

FREQUENCY (Hz)

VS = ±1.0V

FIGURE 1. FREQUENCY RESPONSE vs SUPPLY VOLTAGE FIGURE 2. FREQUENCY RESPONSE vs SUPPLY VOLTAGE

45
40
35
30
25
20

AV = 100

GAIN (dB)

15

R

= 10kΩ

L

= 2.7pF

C

L

10

5
0

100 10k 100k 1M

R

F/RG

R

F

R

G

= 99.02

= 221kΩ

= 2.23kΩ

VS = ±1.25V

1k

FREQUENCY (Hz)

VS = ±2.5V

VS = ±1.0V

4

FN6301.1

April 20, 2007