INTERSIL ISL28288 DATA SHEET

®

ISL28288

Data Sheet September 20, 2006

Dual Micropower Single Supply
Rail-to-Rail Input and Output (RRIO)
Precision Op-Amp

The ISL28288 is a dual 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 EL8188.

The ISL28288 features an Input Range Enhancement Circuit
(IREC) which enables the ISL28288 to maintain CMRR
performance for input voltages equal to the positive and
negative supply rails. The input signal is capable of swinging
10% above the positive supply rail and to 100mV below the
negative supply with only a slight degradation of the CMRR
performance. The output operation is rail to rail.

The ISL28288 draws minimal supply current while meeting
excellent DC-accuracy, AC-performance, noise and output
drive specifications.

The ISL28288 can be operated from one lithium cell or two
Ni-Cd batteries. The input range includes both positive and
negative rail.

Ordering Information

PART

PART NUMBER

ISL28288FUZ
(See Note)

ISL28288FUZ-T7
(See Note)

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.

MARKING

28288Z 50/Tube 10 Ld MSOP

28288Z 7”

TAPE &

REEL PACKAGE

(Pb-free)
10 Ld MSOP

(1500 pcs)

(Pb-free)

PKG.

DWG. #

MDP0043

MDP0043

FN6339.0

Features

• Low power 120µA typ supply current for both channels

• 1.5mV max offset voltage

• 30pA typ input bias current

• 300kHz gain-bandwidth product

• 100dB typ PSRR and CMRR

• Single supply operation down to 2.4V

• Input is capable of swinging above V+ and below V­(ground sensing)

• Rail-to-rail input and output (RRIO)

• 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

Pinout

ISL28288

(10 LD MSOP)

TOP VIEW

IN+_A

1

EN

_A

2

V-

3

EN

_B

4

IN+_B IN-_B

5 6

10

IN-_A

-

9

8

7

OUT_A

V+

OUT_B

+

+

-

1

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.

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

Copyright Intersil Americas Inc. 2006. All Rights Reserved

ISL28288

Absolute Maximum Ratings (T

Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V

Supply Turn On Voltage Slew Rate . . . . . . . . . . . . . . . . . . . . . 1V/µs

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

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

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

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

= +25°C)

A

- 0.5V to V+ + 0.5V

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

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

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

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

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+ = 5V, V- = 0V, V

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

CM

A

= 2.5V, VO = 1.4V, TA = +25°C unless otherwise specified.

guaranteed by characterization

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

V

OS

∆V

OS

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

∆Ti me

∆V

OS

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

∆T

I

OS

I

B

e

N

Input Offset Voltage -1.5

-2

±0.05 1.5

2

mV

Long Term Input Offset Voltage Stability 1.2 µV/Mo

Input Offset Drift vs Temperature 2.2 µV/°C

Input Offset Current

-600

Input Bias Current

-40°C to +85°C

-30

-80

Input Noise Voltage Peak-to-Peak f = 0.1Hz to 10Hz 5.4 µV

±530

600

±10 30

80

pA

pA

PP

Input Noise Voltage Density fO = 1kHz 48 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

= 0V to 5V 80

CM

100 dB

75

PSRR Power Supply Rejection Ratio V+ = 2.4V to 5V 85

105 dB

80

A

V

VOL

OUT

Large Signal Voltage Gain VO = 0.5V to 4.5V, RL = 100kΩ 200

190

V

= 0.5V to 4.5V, RL = 1kΩ 25 V/mV

O

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

300 V/mV

Output low, R

= 1kΩ 130 175

L

mV

225

Output high, R

Output high, R

SR Slew Rate 0.12

= 100kΩ 4.990

L

= 1kΩ 4.800

L

4.97

4.750

0.09

4.996 V

4.880 V

±0.14 0.16

V/µs

0.21

GBW Gain Bandwidth Product 300 kHz

2

FN6339.0

September 20, 2006

ISL28288

Electrical Specifications V+ = 5V, V- = 0V, V

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

= 2.5V, VO = 1.4V, TA = +25°C unless otherwise specified.

CM

guaranteed by characterization (Continued)

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

I

S,ON

Supply Current, Enabled All channels enabled. 120 156

175

I

S,OFF

+ Short Circuit Sourcing Capability RL = 10Ω 29

I

SC

I

- Short Circuit Sinking Capability RL = 10Ω 24

SC

Supply Current, Disabled All channels disabled. 4 7

9

31 mA

24

26 mA

20

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 0.8 1

1.5

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

Typical Performance Curves

+1

0

-1

-2

-3

-4

GAIN (dB)

-5

Vout = 50mVp-p
A

V

-6

C

L

R

F

-7
8

1k

VS = ±2.5V

RL = 1k

VS = ±2.5V

RL = 10k

= 1
= 3pF

=0/RG = INF

10k 100k 1M

FREQUENCY (Hz)

VS = ±1.2V

RL = 1k

VS = ±1.2V

RL = 10k

5M

45
40
35
30
25
20

AV = 100

GAIN (dB)

15

= 10kΩ

R

L

= 3pF

C

L

10

= 100kΩ

R

F

= 1kΩ

R

G

5
0

100 10k 100k 1M

VS = ±1.0V

1k

FREQUENCY (Hz)

VS = ±2.5V

VS = ±1.2V

µA

µA

µA

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

100

INPUT OFFSET VOLTAGE (µV)

80
60
40
20

-20

-40

-60

-80

-100

V

= VDD/2

CM

V

= 5V

0

V

= 2.5V

DD

05

1324

OUTPUT VOLTAGE (V)

DD

0

-20

-40

-60

-80

INPUT OFFSET VOLTAGE (µV)

-100

VOS, µV

05

1324

COMMON-MODE INPUT VOLTAGE (V)

FIGURE 3. INPUT OFFSET VOLTAGE vs OUTPUT VOLTAGE FIGURE 4. INPUT OFFSET VOLTAGE vs COMMON-MODE

INPUT VOLTAGE

3

FN6339.0

September 20, 2006

Typical Performance Curves (Continued)

ISL28288

120

80

40

GAIN (dB)

0

-40

-80
11k100k10M

10

FREQUENCY (Hz)

FIGURE 5. A

10

VS = 5VDC

0

V

SOURCE

-10

= 10k

R

L

-20

AV = +1

-30

-40

-50

-60

-70

TEMPERATURE (°C)

-80

-90

-100
10 100 1k 10k 100k

vs FREQUENCY @ 100kΩ LOAD FIGURE 6. A

VOL

= 1Vp-p

Ω

PSRR -

10k 1M100

PSRR +

PSRR (dB)

80

40

0

-40

-80

-120

1M

FIGURE 7. PSRR vs FREQUENCY FIGURE 8. CMRR vs FREQUENCY

100

80

60

PHASE (°)

40

GAIN (dB)

20

0

-20
10 10k 1M

100

FREQUENCY (Hz)

VOL

10

0

VS = ±2.5VDC

-10

V

= 1Vp-p

SOURCE

R

= 10k

Ω

L

-20

-30

-40

-50

-60

CMRR (dB)

-70

-80

-90

-100
10 100 1k 10k 100k 1M

TEMPERATURE (

PHASE

GAIN

100k1k

vs FREQUENCY @ 1kΩ LOAD

°

C)

200
150
100
50
0

-50

-100

-150

PHASE (°)

5.0

4.0

3.0

2.0

VOLTS (V)

1.0

0

0 50 100 150 200 250

VS = 5VDC
V

= 2Vp-p

OUT

R

= 1k

Ω

L

A

= -2

V

TIME (µs)

VOLTS (V)

2.56

2.54

2.52

2.50

2.48

2.46

2.44

2.42

V

IN

V

OUT

= 5VDC

V

S

V

= 0.1Vp-p

OUT

= 1kΩ

R

L

A

= +1

V

0 2 4 6 8 101214161820

TIME (µs)

FIGURE 9. SMALL SIGNAL TRANSIENT RESPONSE FIGURE 10. LARGE SIGNAL TRANSIENT RESPONSE

4

September 20, 2006

V

OUT

V

IN

FN6339.0