LM7321 datasheet(3/35 Pages) TI

3 / 35 page

LM7321, LM7322

www.ti.com

SNOSAW8D – MAY 2008 – REVISED MARCH 2013

2.7V Electrical Characteristics

(1)

Unless otherwise specified, all limits ensured for TA = 25°C, V

+ = 2.7V, V− = 0V, V

CM = 0.5V, VOUT = 1.35V, and RL > 1 MΩ to

1.35V. Boldface limits apply at the temperature extremes.

Min

Typ

Max

Symbol

Parameter

Condition

Units

(2)

(3)

(2)

−5

VOS

Input Offset Voltage

VCM = 0.5V & VCM = 2.2V

±0.7

−6

VCM = 0.5V & VCM = 2.2V

TC VOS

Input Offset Voltage Temperature Drift

±2

µV/C

(4)

VCM = 0.5V

−2.0

−1.2

(5)

−2.5

Input Bias Current

µA

VCM = 2.2V

0.45

1.0

(5)

1.5

200

IOS

Input Offset Current

VCM = 0.5V and VCM = 2.2V

300

100

≤ VCM ≤ 1.0V

CMRR

Common Mode Rejection Ratio

≤ VCM ≤ 2.7V

104

PSRR

Power Supply Rejection Ratio

2.7V

≤ VS ≤ 30V

−0.3

−0.1

0.0

CMVR

Common Mode Voltage Range

CMRR > 50 dB

2.8

3.0

2.7

0.5V

≤ VO ≤ 2.2V

RL = 10 kΩ to 1.35V

AVOL

Open Loop Voltage Gain

0.5V

≤ VO ≤ 2.2V

RL = 2 kΩ to 1.35V

RL = 10 kΩ to 1.35V

150

VID = 100 mV

160

Output Voltage Swing

High

RL = 2 kΩ to 1.35V

100

250

VID = 100 mV

280

mV from

VOUT

either rail

RL = 10 kΩ to 1.35V

120

VID = −100 mV

150

Output Voltage Swing

Low

RL = 2 kΩ to 1.35V

120

VID = −100 mV

150

Sourcing

VID = 200 mV, VOUT = 0V

(6)

IOUT

Output Current

Sinking

VID = −200 mV, VOUT = 2.7V

(6)

0.95

1.3

LM7321

1.9

Supply Current

2.0

2.5

LM7322

3.8

Slew Rate (7)

AV = +1, VI = 2V Step

8.5

V/µs

Unity Gain Frequency

RL = 2 kΩ, CL = 20 pF

7.5

MHz

(1)

Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very

limited self-heating of the device such that TJ = TA. No ensured specification of parametric performance is indicated in the electrical

tables under conditions of internal self-heating where TJ > TA.

(2)

All limits are ensured by testing or statistical analysis.

(3)

Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary

over time and will also depend on the application and configuration. The typical values are not tested and are not ensured on shipped

production material.

(4)

Offset voltage temperature drift determined by dividing the change in VOS at temperature extremes into the total temperature change.

(5)

Positive current corresponds to current flowing into the device.

(6)

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. Short circuit test is a momentary test. Output short circuit duration is

infinite for VS ≤ 6V at room temperature and below. For VS > 6V, allowable short circuit duration is 1.5 ms.

(7)

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

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