intersil ISL28488 DATA SHEET

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ISL28288, ISL28488

Data Sheet June 28, 2007

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

The ISL28288 and ISL28488 are dual and quad channel
micropower operational amplifiers optimized for single
supply operation over the 2.4V to 5V range. They can be
operated from one lithium cell or two Ni-Cd batteries. For
equivalent performance in a single channel op-amp
reference EL8188.

These devices feature an Input Range Enhancement Circuit
(IREC) which enables them to maintain CMRR performance
for input voltages 10% above the positive supply rail and to
100mV below the negative supply. The output operation is
rail to rail.

The ISL28288 and ISL28488 draw minimal supply current
while meeting excellent DC-accuracy, AC-performance,
noise and output drive specifications. The ISL28288
contains a power down enable pin that reduces the power
supply current to typically less than 4µA in the disabled
state.

Pinouts

ISL28288

(10 LD MSOP)

TOP VIEW

IN+_A

1

EN

_A

2

V-

3

EN

_B

4

IN+_B IN-_B

5 6

ISL28488

(16 LD QSOP)

TOP VIEW

1

OUT_A

IN-_A

2

-

IN+_A

3

V+

4

IN+_B IN+_C

5

IN-_B

6

+

+

-

10

IN-_A

-

9

+

+

-

OUT_A

8

V+

OUT_B

7

16

OUT_D

IN-_D

15

+

-

IN+_D

14

V-

13

12

-

+

IN-_C

11

FN6339.1

Features

• Low power 120µA typical supply current

• 1.5mV max offset voltage

• 30pA max input bias current

• 300kHz typical gain-bandwidth product

• 105dB typical PSRR

• 100dB typical 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)

• Enable Pin (ISL28288 only)

• 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

Ordering Information

PART NUMBER

(Note)

ISL28288FUZ 8288Z 10 Ld MSOP MDP0043
ISL28288FUZ-T7 8288Z 10 Ld MSOP MDP0043
ISL28488FAZ 28488 FAZ 16 Ld QSOP MDP0040
ISL28488FAZ-T7 28488 FAZ 16 Ld QSOP MDP0040
*“-T7” suffix is for tape and reel. Please refer to TB347 for details on

reel specifications.
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

PACKAGE

(Pb-Free)

PKG. DWG.

#

OUT_B

7

NC NC

8 9

1

10

OUT_C

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.

ISL28288, ISL28488

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

Machine Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300V

= +25°C) Thermal Information

A

Thermal Resistance θ

10 Ld MSOP Package . . . . . . . . . . . . . . . . . . . . . . . 115

16 Ld QSOP Package . . . . . . . . . . . . . . . . . . . . . . . 112

- 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

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

(°C/W)

JA

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

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.

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: T

Operating Junction

Electrical Specifications V

= 5V, V- = 0V, VCM = 2.5V, RL = Open, TA = +25°C unless otherwise specified.

+

= TC = T

J

A

Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data
established by characterization

PARAMETER DESCRIPTION CONDITIONS

MIN

(Note 1) TYP

MAX

(Note 1) UNIT

DC SPECIFICATIONS

V

OS

ΔV

OS

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

ΔTi me

ΔV

OS

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

ΔT

I

OS

I

B

Input Offset Voltage -1.5

-2

±0.05 1.5

mV

2

Long Term Input Offset Voltage Stability ISL28288 1.2 µV/Mo

Input Offset Voltage vs Temperature 0.9 µV/°C

Input Offset Current

-40°C to +85°C

Input Bias Current

-40°C to +85°C

-30

-80

-30

-80

±530

80

±10 30

80

pA

pA

CMIR Common-Mode Voltage Range Guaranteed by CMRR 05V
CMRR Common-Mode Rejection Ratio V

PSRR Power Supply Rejection Ratio V

= 0V to 5V 80

CM

= 2.4V to 5V 85

+

75

100 dB

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 60 V/mV

O

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

300 V/mV

I

S,ON

Output low, R

Output high, R

= 1kΩ 130 175

L

= 100kΩ 4.990

L

4.996 V

225

4.97

Output high, R

= 1kΩ 4.800

L

4.750

4.880 V

Quiescent Supply Current, Enabled ISL28288, All channels enabled. 120 156

175

ISL28488, All channels enabled. 240 315

350

2

mV

µA

µA

FN6339.1

June 28, 2007

ISL28288, ISL28488

Electrical Specifications V

= 5V, V- = 0V, VCM = 2.5V, RL = Open, TA = +25°C unless otherwise specified.

+

Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data
established by characterization (Continued)

MIN

PARAMETER DESCRIPTION CONDITIONS

I

S,OFF

+ Short Circuit Sourcing Capability RL = 10Ω 29

I

O

I

- Short Circuit Sinking Capability RL = 10Ω 24

O

Quiescent Supply Current, Disabled
(ISL28288)

All channels disabled. 4 7

(Note 1) TYP

24

20

V

SUPPLY

V

ENH

V

ENL

I

ENH

I

ENL

Supply Operating Range V+ to V- 2.4 5.0 V
EN Pin High Level (ISL28288) 2 V
EN Pin Low Level (ISL28288) 0.8 V
EN Pin Input High Current (ISL28288) VEN = V

EN Pin Input Low Current (ISL28288) VEN = V

+

-

AC SPECIFICATIONS

GBW Gain Bandwidth Product A

e

n

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

= 100, RF = 100kΩ, RG = 1kΩ,

V

R

= 10kΩ to V

L

CM

Input Noise Voltage Density fO = 1kHz 48 nV/√Hz

i

n

CMRR @ 60Hz Input Common Mode Rejection Ratio V
PSRR+ @

120Hz
PSRR- @

120Hz

Input Noise Current Density fO = 1kHz 0.1 pA/√Hz

= 1V

, RL = 10kΩ to V

P-P

= 1V

, RL = 10kΩ to V

P-P

= 1V

, RL = 10kΩ to V

P-P

CM

CM

CM

Power Supply Rejection Ratio (V

Power Supply Rejection Ratio (V

CM

)V

+

)V

-

, V- = ±1.2V and ±2.5V,

+

V

SOURCE

, V- = ±1.2V and ±2.5V

+

V

SOURCE

TRANSIENT RESPONSE

SR Slew Rate

t

EN

Enable to Output Turn-on Delay Time,
10% EN

Enable to Output Turn-off Delay Time,
10% EN

to 10% Vout, (ISL28288)

to 10% Vout, (ISL28288)

VEN

= 5V to 0V, AV = -1,

RG = RF = RL = 1k

= 0V to 5V, AV = -1,

VEN

RG = RF = RL = 1k

to V

to V

±0.12
±0.09

CM

CM

±0.14 ±0.16

NOTE:

1. Parts are 100% tested at +25°C. Over temperature limits established by characterization and are not production tested.

MAX

(Note 1) UNIT

µA

9

31 mA

26 mA

0.8 1

µA

1.5

0 +0.1 µA

300 kHz

P-P

-70 dB

-80 dB

-60 dB

V/µs

±0.21

2µs

0.1 µs

3

FN6339.1

June 28, 2007

ISL28288, ISL28488

Typical Performance Curves V

+1

0

-1

-2

-3

-4

GAIN (dB)

-5

V
AV = 1

-6

C
R

-7
8

1k

V+, V-= ±2.5V

RL = 1k

V+, V- = ±2.5V

RL = 10k

= 50mV

OUT

= 3pF

L

= 0, RG = INF

F

P-P

10k 100k 1M

FREQUENCY (Hz)

= 5V, V- = 0V, VCM = 2.5V, RL = Open

+

V+, V- = ±1.2V

RL = 1k

V+, V- = ±1.2V

RL = 10k

5M

FIGURE 1. FREQUENCY RESPONSE vs SUPPLY VOLTAGE

120

80

40

GAIN (dB)

0

-40

-80
11k100k10M

10

FREQUENCY (Hz)

FIGURE 3. A

vs FREQUENCY @ 100kΩ LOAD

VOL

10k 1M100

80

40

0

-40

-80

-120

45
40
35
30
25
20

AV = 100

GAIN (dB)

15

= 10kΩ

R

L

C

= 3pF

L

10

= 100kΩ

R

F

= 1kΩ

R

G

5
0

100 10k 100k 1M

V+, V- = ±1.0V

1k

FREQUENCY (Hz)

V+, V- = ±2.5V

V+, V- = ±1.2V

FIGURE 2. FREQUENCY RESPONSE vs SUPPLY VOLTAGE

100

80

60

PHASE (°)

40

GAIN (dB)

20

0

-20
10 10k 1M

FIGURE 4. A

100

FREQUENCY (Hz)

VOL

PHASE

GAIN

100k1k

vs FREQUENCY @ 1kΩ LOAD

200
150
100
50
0

-50

-100

-150

PHASE (°)

10

= 5VDC

V

+

0

V

-10

RL = 10kΩ

-20

A

-30

-40

-50

PSRR (dB)

-60

-70

-80

-90

-100
10 100 1k 10k 100k

SOURCE

= +1

V

= 1V

P-P

PSRR -

FREQUENCY (Hz)

PSRR +

1M

10

0

, V- = ±2.5VDC

V

+

V

-10
RL = 10kΩ

-20

-30

-40

-50

-60

CMRR (dB)

-70

-80

-90

-100
10 100 1k 10k 100k

SOURCE

= 1V

P-P

FREQUENCY (Hz)

FIGURE 5. PSRR vs FREQUENCY FIGURE 6. CMRR vs FREQUENCY

4

1M

FN6339.1

June 28, 2007