NSC LM8272MMX Datasheet

December 2002

LM8272 Dual
RRIO, High Output Current & Unlimited Cap Load Op
Amp in Miniature Package

LM8272 Dual RRIO, High Output Current & Unlimited Cap Load Op Amp in Miniature Package

General Description

The LM8272 is a Rail-to-Rail input and output Op Amp which
can operate with a wide supply voltage range. This device
has high output current drive, greater than Rail-to-Rail input
common mode voltage range, unlimited capacitive load drive
capability while requiring only 0.95mA/channel supply cur­rent. It is specifically designed to handle the requirements of
flat panel TFT panel V
being suitable for other low power, and medium speed ap­plications which require ease of use and enhanced perfor­mance over existing devices.

Greater than Rail-to-Rail input common mode voltage range
with 50dB of Common Mode Rejection, allows high side and
low side sensing, among many applications, without having
any concerns over exceeding the range and no compromise
in accuracy. Exceptionally wide operating supply voltage
range of 2.5V to 24V alleviates any concerns over function­ality under extreme conditions and offers flexibility of use in
multitude of applications. In addition, most device param­eters are insensitive to power supply variations; this design
enhancement is yet another step in simplifying its usage.

The LM8272 is offered in the 8-pin MSOP package.

driver applications as well as

COM

Connection Diagram

8-Pin MSOP

Features

(VS= 12V, TA= 25˚C, Typical values unless specified).

n GBWP 15MHz
n Wide supply voltage range 2.5V to 24V
n Slew rate 15V/µs
n Supply current/channel 0.95mA
n Cap load tolerance Unlimited
n Output short circuit current
n Output current (1V from rails)
n Input common mode voltage 0.3V beyond rails
n Input voltage noise 15nV/
n Input current noise 1.4pA/

±

130mA

±

65mA

Applications

n TFT-LCD flat panel V
n A/D converter buffer
n High side/low side sensing
n Headphone amplifier

Large Signal Step Response for Various Cap. Load

COM

driver

Top View

10130863

10130899

Ordering Information

Package Part Number Package Marking Transport Media NSC Drawing

8-Pin MSOP LM8272MM

LM8272MMX 3.5k Unit Tape and Reel

© 2002 National Semiconductor Corporation DS101308 www.national.com

A60

1k Unit Tape and Reel

MUA08A

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

LM8272 Dual

ESD Tolerance

Differential +/−10V

V

IN

Output Short Circuit Duration (Notes 3, 11)

Supply Voltage (V

Voltage at Input/Output pins V

Storage Temperature Range −65˚C to +150˚C

+-V−

) 27V

2KV (Note 2)

200V(Note 9)

+

+0.3V, V−−0.3V

Junction Temperature (Note 4) +150˚C

Soldering Information:

Infrared or Convection (20 sec.) 235˚C

Wave Soldering (10 sec.) 260˚C

Operating Ratings

Supply Voltage (V+-V−) 2.5V to 24V

Junction Temperature Range(Note 4) −40˚C to +85˚C

Package Thermal Resistance, θ

8-Pin MSOP 235C/W

,(Note 4)

JA

5V Electrical Characteristics

Unless otherwise specified, all limited guaranteed for TJ= 25˚C, V+= 5V, V−= 0V, VCM= 0.5V, VO=V+/2, and

>

1MΩ to V−. Boldface limits apply at the temperature extremes.

R

L

Symbol Parameter Condition

V

OS

TC V

Input Offset Voltage VCM= 0.5V & VCM= 4.5V +/−0.7 +/−5

Input Offset Average Drift VCM= 0.5V & VCM= 4.5V

OS

Typ

(Note 5)

+/−2 — µV/˚C

(Note 12)

I

B

I

OS

Input Bias Current (Note 7) —

Input Offset Current 20 250

CMRR Common Mode Rejection Ratio VCMstepped from 0V to 5V 80 64

+

+PSRR Positive Power Supply Rejection Ratio V

from 4.5V to 13V 100 78

CMVR Input Common-Mode Voltage Range CMRR>50dB −0.3 −0.1

5.3 5.1

A

VOL

V

O

I

SC

Large Signal Voltage Gain VO= 0.5 to 4.5V,

= 10kΩ to V+/2

R

L

Output Swing
High

Output Swing
Low

Output Short Circuit Current Sourcing to V

RL= 10kΩ to V

I

SOURCE

R

I

SINK

= 5mA 4.85 4.70

= 10kΩ to V

L

= 5mA 300 350

−

−

+

80 64

4.93 4.85

215 250 mV

100 —

VID= 200mV (Note 10)

Sinking to V

+

100 —

VID= −200mV (Note 10)

I

I

OUT

S

Output Current VID=±200mV, VO= 1V from rails

Supply Current (Both Channel) No load, VCM= 0.5V 1.8 2.3

SR Slew Rate (Note 8) AV= +1, VI=5V

f

u

Unity Gain Frequency VI= 10mVp, RL=2KΩ to V+/2 7.5 — MHz

PP

±

55 — mA

12 — V/µs

GBWP Gain-Bandwidth Product f = 50KHz 13 — MHz

Phi

e

m

n

Phase Margin VI= 10mVp, RL=2kΩ to V+/2 55 — deg

Input-Referred Voltage Noise f = 2KHz, RS=50Ω 15 — nV/

Limit

(Note 6)

+/− 7

±

2.00

±

2.70

400

61

74

0.0

5.0

60

2.8

Units

mV

max

µA

max

nA

max

dB

min

dB

min

V

max

V

min

dB

min

V

min

max

mA

mA

max

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5V Electrical Characteristics (Continued)

Unless otherwise specified, all limited guaranteed for TJ= 25˚C, V+= 5V, V−= 0V, VCM= 0.5V, VO=V+/2, and

>

1MΩ to V−. Boldface limits apply at the temperature extremes.

R

L

Symbol Parameter Condition

i

n

Input-Referred Current Noise f = 2KHz 1.4 — pA/

Typ

(Note 5)

(Note 6)

Limit

LM8272 Dual

Units

f

max

Full Power Bandwidth ZL= (20pF || 10kΩ)toV+/2 700 — KHz

12V Electrical Characteristics

Unless otherwise specified, all limited guaranteed for TJ= 25˚C, V+= 12V, V−= 0V, VCM= 6V, VO= 6V, and

>

1MΩ to V−. Boldface limits apply at the temperature extremes.

R

L

Symbol Parameter Condition

V

OS

TC V

Input Offset Voltage VCM= 0.5V & VCM= 11.5V +/−0.7 +/−7

Input Offset Average Drift VCM= 0.5V & VCM= 11.5V

OS

Typ

(Note 5)

+/−2 — µV/˚C

(Note 12)

I

B

I

OS

Input Bias Current (Note 7) —

Input Offset Current 30 275

CMRR Common Mode Rejection Ratio VCMstepped from 0V to 12V 88 74

+

+PSRR Positive Power Supply Rejection Ratio V

−PSRR Negative Power Supply Rejection

from 4.5V to 13V, VCM= 0.5V 100 78

85 — dB

Ratio

>

CMVR Input Common-Mode Voltage Range CMRR

50dB −0.3 −0.1

12.3 12.1

A

VOL

V

O

I

SC

Large Signal Voltage Gain VO=1Vto11V

= 10kΩ to V+/2

R

L

Output Swing
High

Output Swing
Low

Output Short Circuit Current Sourcing to V

RL10kΩ to V+/2 11.8 11.7

I

SOURCE

R

I

SINK

= 5mA 11.6 11.5

= 10kΩ to V+/2 0.25 0.3

L

= 5mA .40 .45

−

83 74

130 110

VID= 200mV (Note 10)

Sinking to V

+

130 110

VID= 200mV (Note 10)

I

I

OUT

S

Output Current VID=±200mV, VO= 1V from rails

Supply Current (Both Channel) No load, VCM= 0.5V 1.9 2.4

SR Slew Rate

(Note 8)

R

OUT

f

u

Close Loop Output Resistance AV= +1, f = 100KHz 3 — Ω

Unity Gain Frequency VI= 10mVp, RL=2kΩ to V+/2 8 — MHz

= +1, VI= 10VPP,CL= 10pF 15 —

A

V

A

= +1, VI= 10VPP,CL= 0.1µF 1 —

V

±

65 — mA

GBWP Gain-Bandwidth Product f = 50KHz 15 — MHz

Phi

m

GM Gain Margin V

Phase Margin VI= 10mVp, RL=2kΩ to V+/2 57 — Deg

= 10mVp, RL=2kΩ to V+/2 20 — dB

I

Limit

(Note 6)

+/− 9

±

2.00

±

2.80

550

72

74

0

12.0

70

2.9

Units

mV

max

µA

max

nA

max

dB

min

dB

min

V

max

V

min

dB

min

V

min

V

max

mA
min

mA

max

V/µs

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12V Electrical Characteristics (Continued)

Unless otherwise specified, all limited guaranteed for TJ= 25˚C, V+= 12V, V−= 0V, VCM= 6V, VO= 6V, and

>

1MΩ to V−. Boldface limits apply at the temperature extremes.

R

L

Symbol Parameter Condition

LM8272 Dual

−3dB BW Small Signal -3db Bandwidth A

e

n

Input-Referred Voltage Noise f = 2KHz, RS=50Ω 15 — nV/

= +1, RL=2kΩ to V+/2 12.5 —

V

= +1, RL= 600Ω to V+/2 10.5 —

V

A

= +10, RL= 600Ω to V+/2 1.0 —

V

(Note 5)

Typ

Limit

(Note 6)

Units

MHzA

i

n

f

max

THD+N Total Harmonic Distortion +Noise A

CT Rej. Cross-Talk Rejection f = 5MHz, Driver R

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Rating indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.

Note 2: Human body model, 1.5kΩ in series with 100pF.

Note 3: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the

maximum allowed junction temperature of 150˚C.

Note 4: The maximum power dissipation is a function of T
P

D

Note 5: Typical Values represent the most likely parametric norm.

Note 6: All limits are guaranteed by testing or statistical analysis.

Note 7: Positive current corresponds to current flowing into the device.

Note 8: Slew rate is the slower of the rising and falling slew rates. Connected as a Voltage Follower.

Note 9: Machine Model, 0Ω is series with 200pF.

Note 10: Short circuit test is a momentary test. See Note 11.

Note 11: Output short circuit duration is infinite for V

Note 12: Offset voltage average drift determined by dividing the change in V

Input-Referred Current Noise f = 2KHz 1.4 — pA/

Full Power Bandwidth ZL= (20pF || 10kΩ)toV+/2 300 — KHz

= +2, RL=2kΩ to V+/2

V

=8VPP,VS=±5V

V

O

(max), θJA, and TA. The maximum allowable power dissipation at any ambient temperature is

=(TJ(max) - TA)/ θJA. All numbers apply for packages soldered directly onto a PC board.

J

≤ 6V at room temperature and below. For V

S

at temperature extremes into the total temperature change.

OS

= 10kΩ to V+/2 68 — dB

L

>

6V, allowable short circuit duration is 1.5ms.

S

0.02 — %

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Typical Performance Charateristics

VOSDistribution VOSvs. VCMfor 3 Representative Units

101308A2 10130830

VOSvs. VCMfor 3 Representative Units VOSvs. VCMfor 3 Representative Units

LM8272 Dual

10130829 10130831

VOSvs. VSfor 3 Representative Units VOSvs. VSfor 3 Representative Units

10130884

10130883

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