intersil ISL28148, ISL28248, ISL28448 DATA SHEET

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®

ISL28148, ISL28248, ISL28448

Data Sheet March 13, 2008

4.5MHz, Single Dual and Quad Precision
Rail-to-Rail Input-Output (RRIO) Op Amps
with Very Low Input Bias Current

The ISL28148, ISL28248 and ISL28448 are 4.5MHz
low-power single, dual and quad operational amplifiers. The
parts are optimized for single supply operation from 2.4V to

5.5V, allowing operation from one lithium cell or two Ni-Cd
batteries.

The single, dual and quad feature an Input Range
Enhancement Circuit (IREC) which enables them to maintain
CMRR performance for input voltages greater than the
positive supply. The input signal is capable of swinging

0.25V above the positive supply and to 100mV below the
negative supply with only a slight degradation of the CMRR
performance. The output operation is rail-to-rail.

The parts draw minimal supply current (900µA per amplifier)
while meeting excellent DC accuracy, AC performance,
noise and output drive specifications. The ISL28148 features
an enable pin that can be used to turn the device off and
reduce the supply current to a maximum of 16µA. Operation
is guaranteed over -40°C to +125°C temperature range.

FN6337.2

Features

• 4.5MHz gain bandwidth product

• 900µA supply current (per amplifier)

• 1.8mV maximum offset voltage

• 1pA typical input bias current

• Down to 2.4V single supply operation

• Rail-to-rail input and output

• Enable pin (ISL28148 SOT-23 package only)

• -40°C to +125°C operation

• Pb-free (RoHS compliant)

Applications

• Low-end audio

• 4mA to 20mA current loops

• Medical devices

• Sensor amplifiers

• ADC buffers

• DAC output amplifiers

Ordering Information

PART NUMBER PART MARKING

ISL28148FHZ-T7* (Note 1) GABT 6 Ld SOT-23 (Tape and Reel) MDP0038
ISL28148FHZ-T7A* (Note 1) GABT 6 Ld SOT-23 (Tape and Reel) MDP0038

Coming Soon, ISL28148FI Z-T7 (Not e 2) 178Z 6 Ld WLCSP (1.5mmx1.0mm) W3x2.6C
Coming Soon, ISL28248FBZ (Note 1) 28248BZ 8 Ld SOIC MDP0027
Coming Soon, ISL28248FBZ-T7* (Note 1) 28248BZ 8 Ld SO I C (Tape an d R e el ) MDP0027
Coming Soon, IS L 28248F UZ (Note 1) 8248Z 8 Ld M S OP MDP0043
Coming Soon, IS L 28248F UZ-T7* (Note 1) 8248Z 8 Ld M S O P (Tape and R e e l ) MDP0043
Coming Soon, ISL28448 FVZ (Note 1) MXZ 14 Ld TSSOP MDP0044
Coming Soon, ISL28448 FVZ-T7* (Note 1) MXZ 14 Ld TSSOP (Tape and Reel) MDP0044

*Please refer to TB347 for details on reel specifications.
NOTES:

1. These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and 100%
matte tin plate PLUS ANNEAL - e3 termination finish, which is 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.

2. These Intersil Pb-free WLCSP and BGA packaged products products employ special Pb-free material sets; molding compounds/die attach
materials and SnAgCu - e1 solder ball terminals, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations.
Intersil Pb-free WLCSP and BGA packaged products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free
requirements of IPC/JEDEC J STD-020.

PACKAGE

(Pb-free) PKG. DWG. #

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.

Copyright © Intersil Americas Inc. 2007, 2008. All Rights Reserved.

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

Pinouts

ISL28148, ISL28248, ISL28448

ISL28148

(6 LD SOT-23)

TOP VIEW

A

B

C

OUT

V-

IN+

1

2

+-

3

ISL28148

(6 LD WLCSP)

TOP VIEW

NC

V +

IN -

6

5

4

21

OUT

IN +

V+

EN

IN-

V -

ISL28248

(8 LD SOIC)

TOP VIEW

1

OUT_A

IN-_A

2

+-

IN+_A

3

V- IN+_B

4

+-

8

7

6

5

V+

OUT_B

IN-_B

OUT_A

IN-_A

IN+_A

V+

IN+_B

IN-_B

OUT_B

ISL28448

(14 LD TSSOP)

TOP VIEW

1
2

+-

+-

3
4
5

+-

6
7

+-

14
13
12
11
10

9
8

OUT_D
IN-_D
IN+_D
V­IN+_C
IN-_C
OUT_C

ISL28248

(8 LD MSOP)

TOP VIEW

1

OUT_A

IN-_A

2

+-

IN+_A

3

V- IN+_B

4

+-

8

7

6

5

V+

OUT_B

IN-_B

2

FN6337.2

March 13, 2008

ISL28148, ISL28248, ISL28448

Absolute Maximum Ratings (T

Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.75V

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

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

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

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

ESD Rating

Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3kV

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

= +25°C) Thermal Information

A

Thermal Resistance (Typical, Note 3) θ

6 Ld SOT-23 Package . . . . . . . . . . . . . . . . . . . . . . . 230

6 Ld WLCSP Package . . . . . . . . . . . . . . . . . . . . . . . 130

- 0.5V to V+ + 0.5V

8 Ld SO Package. . . . . . . . . . . . . . . . . . . . . . . . . . . 125

8 Ld MSOP Package . . . . . . . . . . . . . . . . . . . . . . . . 175

14 Ld TSSOP Package . . . . . . . . . . . . . . . . . . . . . . 115

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

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

(°C/W)

JA

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

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

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.

NOTE:

is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.

3. θ

JA

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

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

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

= TC = T

J

= 2.5V, RL = Open, TA = +25°C unless otherwise specified.

CM

A

established by characterization.

PARAMETER DESCRIPTION CONDITIONS

V

OS

Input Offset Voltage -1.8

CSP package -1.0

ΔV

OS

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

ΔT

I

OS

I

B

Input Offset Voltage vs Temperature 0.03 µV/°C

Input Offset Current

T

= -40°C to +85°C

A

Input Bias Current

T

= -40°C to +85°C

A

CSP package -40

MIN

(Note 4) TYP

-2

-0.1

-1.2

-35

±535

-80

-30

±130

-80

±130

-90

(Note 4) UNIT

0

MAX

1.8

2

1.0

1.2

80

80

80

mV

pA

pA

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

= 0V to 5V 75

CM

98 dB

70

PSRR Power Supply Rejection Ratio V

A

V

VOL

OUT

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

Maximum Output Voltage Swing Output low, RL = 100kΩ to V

= 2.4V to 5.5V 80

+

CM

V

= 0.5V to 4.5V, RL = 1kΩ to V

O

CM

CM

75

200

150

98 dB

580 V/mV

50 V/mV

368mV

Output low, R

= 1kΩ to V

L

CM

50 70

mV

110

Output high, R

Output high, R

3

= 100kΩ to V

L

= 1kΩ to V

L

CM

CM

4.994

4.99

4.93

4.89

4.998 V

4.95 V

FN6337.2

March 13, 2008

ISL28148, ISL28248, ISL28448

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

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

= 2.5V, RL = Open, TA = +25°C unless otherwise specified.

CM

established by characterization. (Continued)

MIN

PARAMETER DESCRIPTION CONDITIONS

I

S,ON

Quiescent Supply Current, Enabled 0.7

(Note 4) TYP

0.4

I

S,OFF

+ Short-Circuit Output Source Current RL = 10Ω to V

I

O

I

- Short-Circuit Output Sink Current RL = 10Ω to V

O

Quiescent Supply Current, Disabled ISL28148 SOT-23 package only 10 14

CM

CM

48

45

50

45

V

SUPPLY

V

ENH

V

ENL

I

ENH

I

ENL

Supply Operating Range V+ to V- 2.4 5.5 V
EN Pin High Level ISL28148 SOT-23 package only 2 V
EN Pin Low Level ISL28148 SOT-23 package only 0.8 V
EN Pin Input High Current V EN = V+,ISL28148 SOT-23 package

only

EN Pin Input Low Current V EN = V-, ISL28148 SOT -23 package only 12 25

AC SPECIFICATIONS

GBW Gain Bandwidth Product A

Unity Gain

-3dB Bandwidth A

Bandwidth
e

N

Input Noise Voltage Peak-to-Peak f = 0.1Hz to 10Hz 2 µV

= 100, RF = 100kΩ, RG = 1kΩ,

V

R

= 10kΩ to V

L

=1, RF = 0Ω, V

V

R

= 10kΩ to V

L

CM

CM

OUT

= 10mV

P-P

,

Input Noise Voltage Density fO = 1kHz 28 nV/√Hz

i

N

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

120Hz
PSRR+ @

120Hz

Input Noise Current Density fO = 1kHz 0.016 pA/√Hz

= 1V

CM

Power Supply Rejection Ratio (V-)V

Power Supply Rejection Ratio (V

)V

+

, V- = ±1.2V and ±2.5V,

+

V

SOURCE

, V- = ±1.2V and ±2.5V

+

V

SOURCE

, RL = 10kΩ to V

P-P

= 1V

= 1V

, RL = 10kΩ to V

P-P

, RL = 10kΩ to V

P-P

CM

CM

CM

TRANSIENT RESPONSE

SR Slew Rate
tr, tf, Large

Signal

t

, tf, Small

r

Signal

t

EN

Rise Time, 10% to 90%, V

Fall Time, 90% to 10%, V

Rise Time, 10% to 90%, V

Fall Time, 90% to 10%, V

OUT

OUT

OUT

OUT

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

to 10% V

, (ISL28148)

OUT

Enable to Output Turn-off Delay T ime, 10%
EN

to 10% V

, (ISL28148)

OUT

AV = +2,

V

= 3V

R
AV = +2,

R
AV = +2,

R
AV = +2,

R

EN

RG = RF = RL = 1
V

OUT

=

10kΩ to V

L

=

10kΩ to V

L

= RF = RL =

G

= RF = RL =

G

V

V

V

OUT

OUT

OUT

CM

= 3V

CM

= 10mV

10kΩ to V

= 10mV

10kΩ to V

= 5V to 0V, AV = +2,

= 0V to 5V, AV = +2,

EN

RG = RF = RL = 1k

, RG = RF = 10kΩ

P-P

, RG = RF = 10kΩ

P-P

,

P-P

CM

,

P-P

CM

k to V

CM

to V

CM

NOTE:

4. Parts are 100% tested at +25°C. Temperature limits established by characterization and are not production tested.

MAX

(Note 4) UNIT

0.9 1.1

mA

1.4

µA

16

75 mA

68 mA

11.5

µA

1.6

nA

30

4.5 MHz

13 MHz

PP

85 dB

-82 dB

-100 dB

±4V/µs

530 ns

530 ns

50 ns

50 ns

5µs

0.2 µs

4

FN6337.2

March 13, 2008

ISL28148, ISL28248, ISL28448

Typical Performance Curves V+ = 5V, V- = 0V, V

15

10

5

0

V+ = 5V

-5

= 1k

R

L

CL = 16.3pF

NORMALIZED GAIN (dB)

-10

A

= +2

V

= 10mV

V

OUT

-15
100 1k 10k 100k 1M 10M 100M

FIGURE 1. GAIN vs FREQUENCY vs FEEDBACK RESISTOR

VALUES R

1
0

-1

-2

-3

-4

-5

-6

V+ = 5V

= 10k

R

-7

L

NORMALIZED GAIN (dB)

= 16.3pF

C

L

-8
A

= +1

V

-9

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

FIGURE 3. GAIN vs FREQUENCY vs V

1
0

-1

-2

-3

-4

-5

-6

V+ = 5V

= 10mV

V

-7

OUT

NORMALIZED GAIN (dB)

= 16.3pF

C

L

-8
AV = +1

-9

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

FIGURE 5. GAIN vs FREQUENCY vs R

Rf = Rg = 100k

P-P

FREQUENCY (Hz)

f/Rg

V

OUT

V

OUT

V

OUT

V

OUT

FREQUENCY (Hz)

P-P

FREQUENCY (Hz)

Rf = Rg = 1k

= 100mV

= 50mV
= 10mV

= 1V

RL = 1k

RL = 10k

RL = 100k

Rf = Rg = 10k

, RL = 10k

OUT

L

= 2.5V, RL = Open

CM

FIGURE 6. FREQUENCY RESPONSE vs CLOSED LOOP GAIN

1
0

V

= 100mV

-1

-2

-3

-4

OUT

V
V

V

OUT
OUT

OUT

= 50mV
= 10mV

= 1V

-5

-6

V+ = 5V

= 1k

R

-7

L

NORMALIZED GAIN (dB)

= 16.3pF

C

L

-8
A

= +1

V

-9

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

FREQUENCY (Hz)

FIGURE 2. GAIN vs FREQUENCY vs V

OUT, RL

1
0

V

-1

-2

-3

-4

OUT

V

V

V

OUT
OUT

OUT

= 100mV

= 50mV
= 10mV

= 1V

-5

-6

V+ = 5V

= 100k

R

L

-7

NORMALIZED GAIN (dB)

= 16.3pF

C

L

-8
= +1

A

V

-9

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

FREQUENCY (Hz)

FIGURE 4. GAIN vs FREQUENCY vs V

GAIN (dB)

70
60
50
40
30
20
10

0

-10

AV = 1001

A

A

AV = 1

100

= 101

V

= 10

V

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

AV = 1, Rg = INF, Rf = 0

= 10, Rg = 1k, Rf = 9.09k

A

V

= 101, Rg = 1k, Rf = 100k

A

V

A

= 1001, Rg = 1k, Rf = 1M

V

, RL = 100k

OUT

V+ = 5V
CL = 16.3pF

= 10k

R

L

= 10mV

V

OUT

FREQUENCY (Hz)

= 1k

P-P

5

FN6337.2

March 13, 2008

ISL28148, ISL28248, ISL28448

Typical Performance Curves V+ = 5V, V- = 0V, V

1
0

-1

-2

-3

-4

-5
RL = 10k

-6
CL = 16.3pF

-7

NORMALIZED GAIN (dB)

A

= +1

V

-8

-9

= 10mV

V

OUT

10k 100k 1M 10M 100M

V+ = 2.4V

P-P

FREQUENCY (Hz)

FIGURE 7. GAIN vs FREQUENCY vs SUPPLY VOLTAGE

10

0

-10

-20

-30

-40

-50

CMRR (dB)

-60

-70

-80

-90
100 1k 10k 100k 1M 10M

FREQUENCY (Hz)

FIGURE 9. CMRR vs FREQUENCY; V+ = 2.4V AND 5V

20

0

-20

-40

-60

PSRR (dB)

-80

-100

-120
100 1k 10k 100k 1M 10M

PSRR-

PSRR+

FREQUENCY (Hz)

FIGURE 11. PSRR vs FREQUENCY V

V+ = 5V

V+ = 2.4V, 5V

= 1k

R

L

CL = 16.3pF
A

= +1

V

V

= 1V

CM

P-P

V+, V- = ±2.5V

= 1k

R

L

CL = 16.3pF
A

= +1

V

V

= 1V

CM

P-P

, V- = ±2.5V

+

= 2.5V, RL = Open (Continued)

CM

8
7
6
5
4
3
2
1
0

-1

-2

-3

V

= 5V

+

-4

R

= 1k

L

NORMALIZED GAIN (dB)

-5

A

= +1

V

-6

V

= 10mV

OUT

-7

-8
10k 100k 1M 10M 100M

FIGURE 8. GAIN vs FREQUENCY vs C

20

0

-20

-40

-60

PSRR (dB)

-80

-100

-120
100 1k 10k 100k 1M 10M

FIGURE 10. PSRR vs FREQUENCY, V

1000

100

INPUT VOLTAGE NOISE (nV/√Hz)

10

1 10 100 1k 10k 100k

FIGURE 12. INPUT VOLTAGE NOISE DENSITY vs FREQUENCY

CL = 51.7pF
CL = 43.7pF

CL = 37.7pF

CL = 26.7pF

CL = 16.7pF

CL = 4.7pF

P-P

FREQUENCY (Hz)

FREQUENCY (Hz)

FREQUENCY (Hz)

PSRR-

PSRR+

V+, V- = ±1.2V

= 1k

R

L

CL = 16.3pF
A

= +1

V

V

= 1V

CM

, V- = ±1.2V

+

V+ = 5V

=1k Rg=1k

R

f

A

= +2

V

L

P-P

6

FN6337.2

March 13, 2008