lm7322mmx National Semiconductor Corporation, lm7322mmx Datasheet

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lm7322mmx

Manufacturer Part Number
lm7322mmx
Description
Lm7321 Single/ Lm7322 Dual Rail-to-rail Input/output, ?15v, High Output Current And Unlimited Capacitive Load Operational Amplifier
Manufacturer
National Semiconductor Corporation
Datasheet
1.LM7322MMX.pdf (24 pages)
© 2008 National Semiconductor Corporation
LM7321 Single/ LM7322 Dual Rail-to-Rail Input/Output
±15V, High Output Current and Unlimited Capacitive Load
Operational Amplifier
General Description
The LM7321/LM7322 are rail-to-rail input and output ampli-
fiers with wide operating voltages and high output currents.
The LM7321/LM7322 are efficient, achieving 18 V/µs slew
rate and 20 MHz unity gain bandwidth while requiring only 1
mA of supply current per op amp. The LM7321/LM7322 per-
formance is fully specified for operation at 2.7V, ±5V and
±15V.
The LM7321/LM7322 are designed to drive unlimited capac-
itive loads without oscillations. All LM7321 and LM7322 parts
are tested at −40°C, 125°C, and 25°C, with modern automatic
test equipment. High performance from −40°C to 125°C, de-
tailed specifications, and extensive testing makes them suit-
able for industrial, automotive, and communications applica-
tions.
Greater than rail-to-rail input common mode voltage range
with 50 dB of common mode rejection across this wide voltage
range, allows both high side and low side sensing. Most de-
vice parameters are insensitive to power supply voltage, and
this makes the parts easier to use where supply voltage may
vary, such as automotive electrical systems and battery pow-
ered equipment. These amplifiers have true rail-to-rail output
and can supply a respectable amount of current (15 mA) with
minimal head- room from either rail (300 mV) at low distortion
(0.05% THD+Noise). There are several package options for
each part. Standard SOIC versions of both parts make up-
grading existing designs easy. LM7322 is offered in a space
saving 8-Pin MSOP package. The LM7321 is offered in small
SOT23-5 package, which makes it easy to place this part
close to sensors for better circuit performance.
Typical Performance Characteristics
Output Swing vs. Sourcing Current
202057
20205736
Features
(V
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■
■
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Applications
■
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S
Wide supply voltage range
Output current
Gain bandwidth product
Slew rate
Capacitive load tolerance
Input common mode voltage
Input voltage noise
Input current noise
Supply current/channel
Distortion THD+Noise
Temperature range
Tested at −40°C, 25°C and 125°C at 2.7V, ±5V, ±15V.
Driving MOSFETs and power transistors
Capacitive proximity sensors
Driving analog optocouplers
High side sensing
Below ground current sensing
Photodiode biasing
Driving varactor diodes in PLLs
Wide voltage range power supplies
Automotive
International power supplies
= ±15, T
A
Large Signal Step Response
= 25°C, Typical values unless specified.)
September 5, 2008
+65 mA/−100 mA
0.3V beyond rails
−40°C to 125°C
www.national.com
2.5V to 32V
1.3 pA/
15 nV/
20205749
Unlimited
20 MHz
18 V/µs
−86 dB
1.1 mA
√
√
Hz
Hz

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lm7322mmx Summary of contents

Page 1

... LM7322 is offered in a space saving 8-Pin MSOP package. The LM7321 is offered in small SOT23-5 package, which makes it easy to place this part close to sensors for better circuit performance. Typical Performance Characteristics Output Swing vs. Sourcing Current © 2008 National Semiconductor Corporation Features (V = ±15 ■ ...

Page 2

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Human Body Model Machine Model Charge-Device Model V Differential IN Output Short Circuit Current Supply ...

Page 3

Symbol Parameter I Output Current OUT I Supply Current S SR Slew Rate (Note 10) f Unity Gain Frequency u GBW Gain Bandwidth e Input Referred Voltage Noise Density kHz n i Input Referred Current Noise Density ...

Page 4

Symbol Parameter V Output Voltage Swing OUT High Output Voltage Swing Low I Output Current OUT I Supply Current S SR Slew Rate (Note 10) f Unity Gain Frequency u GBW Gain Bandwidth e Input Referred Voltage Noise Density n ...

Page 5

Symbol Parameter A Open Loop Voltage Gain VOL V Output Voltage Swing OUT High Output Voltage Swing Low I Output Current OUT I Supply Current S SR Slew Rate (Note 10) f Unity Gain Frequency u GBW Gain Bandwidth e ...

Page 6

... Connection Diagrams 5-Pin SOT-23 20205705 Top View Ordering Information Package Part Number LM7321MF 5-Pin SOT-23 LM7321MFE LM7321MFX LM7322MM 8-Pin MSOP LM7322MME LM7322MMX LM7321MA LM7321MAX 8-Pin SOIC LM7322MA LM7322MAX www.national.com 8-Pin SOIC 20205703 Top View Package Media Transport Marking 1k Units Tape and Reel ...

Page 7

Typical Performance Characteristics Output Swing vs. Sourcing Current Output Swing vs. Sourcing Current Output Swing vs. Sourcing Current Unless otherwise specified: T Output Swing vs. Sinking Current 20205734 Output Swing vs. Sinking Current 20205735 Output Swing vs. Sinking Current 20205736 ...

Page 8

V Distribution OS V vs. V (Unit vs. V (Unit www.national.com V OS 20205730 V OS 20205708 V OS 20205710 8 vs. V (Unit 1) CM 20205707 vs. V (Unit 3) CM 20205709 ...

Page 9

V vs. V (Unit 20205712 V vs. V (Unit 20205714 V vs. V (Unit 20205750 V vs. V (Unit vs. V (Unit vs. ...

Page 10

V vs. V (Unit vs. V (Unit vs. V BIAS www.national.com 20205752 20205754 CM 20205723 10 V vs. V (Unit 20205753 V vs. V (Unit 20205755 ...

Page 11

I vs. V BIAS CM 20205725 I vs. V BIAS S 20205721 I vs. V (LM7322 20205775 I vs. V BIAS S I vs. V (LM7321 vs. V (LM7321 20205722 20205718 20205719 ...

Page 12

I vs. V (LM7322 vs. V (LM7322 vs. V (LM7322 www.national.com I vs 20205776 I S 20205777 I S 20205779 12 (LM7321) CM 20205720 vs. V (LM7321) S 20205717 vs. ...

Page 13

I vs. V (LM7322 Positive Output Swing vs. Supply Voltage Negative Output Swing vs. Supply Voltage Positive Output Swing vs. Supply Voltage 20205778 Negative Output Swing vs. Supply Voltage 20205726 Open Loop Frequency Response with Various Capacitive 20205729 ...

Page 14

Open Loop Frequency Response with Various Resistive Load Phase Margin vs. Capacitive Load +PSRR vs. Frequency www.national.com Open Loop Frequency Response with Various Supply 20205783 CMRR vs. Frequency 20205738 −PSRR vs. Frequency 20205740 14 Voltage 20205784 20205739 20205741 ...

Page 15

Small Signal Step Response Input Referred Noise Density vs. Frequency Input Referred Noise Density vs. Frequency Large Signal Step Response 20205737 Input Referred Noise Density vs. Frequency 20205742 THD+N vs. Frequency 20205744 15 20205749 20205743 20205745 www.national.com ...

Page 16

THD+N vs. Output Amplitude THD+N vs. Output Amplitude www.national.com THD+N vs. Output Amplitude 20205746 Crosstalk Rejection vs. Frequency 20205748 16 20205747 20205768 ...

Page 17

Application Information DRIVING CAPACITIVE LOADS The LM7321/LM7322 are specifically designed to drive un- limited capacitive loads without oscillations as shown in Figure 1. FIGURE 1. ±5% Settling Time vs. Capacitive Load In addition, the output current handling capability of the ...

Page 18

FIGURE 4. Output Short Circuit Sourcing Current vs. Input Overdrive FIGURE 5. Output Short Circuit Sinking Current vs. Input Overdrive Figure 6 shows the output voltage, output current, and the resulting input overdrive with the device set for A the ...

Page 19

FIGURE 8. Output Sinking Characteristics with Load Lines SETTLING TIME WITH LARGE CAPACITIVE LOADS Figure 9 below, shows a typical application where the LM7321/LM7322 is used as a buffer amplifier for the V signal employed in a TFT LCD flat ...

Page 20

Table 1 below shows the maximum AC component of the load power dissipated by the op amp for standard Sinusoidal, Tri- angular, and Square Waveforms: TABLE 1. Normalized AC Power Dissipated in the Output Stage for Standard Waveforms P (W.Ω/V ...

Page 21

Physical Dimensions inches (millimeters) unless otherwise noted 5-Pin SOT-23 NS Package Number MF05A 8-Pin MSOP NS Package Number MUA08A 21 www.national.com ...

Page 22

SOIC NS Package Number M08A 22 ...

Page 23

Notes 23 www.national.com ...

Page 24

... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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