LPC661AIM National Semiconductor, LPC661AIM Datasheet

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LPC661AIM

Manufacturer Part Number
LPC661AIM
Description
IC OP AMP LOW PWR CMOS 8-SOIC
Manufacturer
National Semiconductor
Datasheet

Specifications of LPC661AIM

Amplifier Type
General Purpose
Number Of Circuits
1
Output Type
Rail-to-Rail
Slew Rate
0.11 V/µs
Gain Bandwidth Product
350kHz
Current - Input Bias
0.002pA
Voltage - Input Offset
1000µV
Current - Supply
58µA
Current - Output / Channel
40mA
Voltage - Supply, Single/dual (±)
4.75 V ~ 15.5 V, ±2.38 V ~ 7.75 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
-3db Bandwidth
-
Other names
*LPC661AIM
© 2000 National Semiconductor Corporation
LPC661
Low Power CMOS Operational Amplifier
General Description
The LPC661 CMOS operational amplifier is ideal for opera-
tion from a single supply. It features a wide range of operat-
ing supply voltage from +5V to +15V, rail-to-rail output swing
and an input common-mode range that includes ground.
Performance limitations that have plagued CMOS amplifiers
in the past are not a problem with this design. Input V
drift, and broadband noise as well as voltage gain (into 100
k
bipolar equivalents, while the supply current requirement is
typically 55 µA.
This chip is built with National’s advanced Double-Poly
Silicon-Gate CMOS process.
See the LPC660 datasheet for a Quad CMOS operational
amplifier or the LPC662 data sheet for a Dual CMOS opera-
tional amplifier with these same features.
Features
(Typical unless otherwise noted)
n Rail-to-rail output swing
Application Circuits
f
Q = 2.1
Gain = 18.9 dB
O
= 10 Hz
and 5 k ) are all equal to or better than widely accepted
10 Hz Bandpass Filter
DS011227
DS011227-21
OS
,
n Low supply current
n Specified for 100 k
n High voltage gain 120 dB
n Low input offset voltage 3 mV
n Low offset voltage drift 1.3 µV/˚C
n Ultra low input bias current 2 fA
n Input common-mode range includes GND
n Operating range from +5V to +15V
n Low distortion 0.01% at 1 kHz
n Slew rate 0.11 V/µs
Applications
n High-impedance buffer
n Precision current-to-voltage converter
n Long-term integrator
n High-impedance preamplifier
n Active filter
n Sample-and-Hold circuit
n Peak detector
(Maximally Flat, Dual Supply Only)
1 Hz Low-Pass Filter
and 5 k
55 µA
loads
www.national.com
DS011227-23
August 2000

LPC661AIM Summary of contents

Page 1

... Application Circuits 10 Hz Bandpass Filter 2.1 Gain = 18.9 dB © 2000 National Semiconductor Corporation n Low supply current n Specified for 100 k n High voltage gain 120 dB n Low input offset voltage Low offset voltage drift 1.3 µV/˚C n Ultra low input bias current 2 fA ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. + − Supply Voltage (V − Differential Input Voltage + Output Short Circuit to V − Output Short Circuit to V Storage Temperature Range Lead Temperature (Soldering, 10 sec ...

Page 3

DC Electrical Characteristics The following specifications apply for V face limits apply at the temperature extremes; all other limits T Symbol Parameter V Output Swing O I Output Current Output Current ...

Page 4

AC Electrical Characteristics Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in- tended to be functional, but do not guarantee specific performance limits. For ...

Page 5

Typical Performance Characteristics Output Characteristics Current Sourcing CMRR vs Frequency Power Supply Rejection Ratio vs Frequency ± 7.5V 25˚C unless otherwise specified (Continued Input Voltage Noise vs Frequency DS011227-30 CMRR vs Temperature DS011227-32 Open-Loop ...

Page 6

Typical Performance Characteristics Open-Loop Frequency Response Gain and Phase Responses vs Temperature Non-Inverting Slew Rate vs Temperature www.national.com ± 7.5V 25˚C unless otherwise specified (Continued Gain and Phase Responses vs Load Capacitance DS011227-36 Gain ...

Page 7

Typical Performance Characteristics Large-Signal Pulse Non-Inverting Response (A = +1) V Inverting Large-Signal Pulse Response ± 7.5V 25˚C unless otherwise specified (Continued Non-Inverting Small Signal Pulse Response (A = +1) V DS011227-42 Inverting Small-Signal ...

Page 8

Typical Performance Characteristics Stability vs Capacitive Load Note: Avoid resistive loads of less than 500 , as they may cause instability. Application Hints AMPLIFIER TOPOLOGY The topology chosen for the LPC661 is unconventional (compared to general-purpose op amps) in that ...

Page 9

Application Hints (Continued) FIGURE 2. Rx, Cx Improve Capacitive Load Tolerance Capacitive load driving capability is enhanced by using a pull + ( Figure 3 ). Typically a pull up resistor con- up resistor to V ducting 50 µA or ...

Page 10

Application Hints (Continued) FIGURE 4. Example of Guard Ring in P.C. Board Layout, Using the LPC660 FIGURE 5. Inverting Amplifier Guard Ring Connections FIGURE 6. Non-Inverting Amplifier Guard Ring Connections FIGURE 7. Follower Guard Ring Connections www.national.com DS011227-8 DS011227-9 FIGURE ...

Page 11

Application Hints (Continued) (Input pins are lifted out of PC board and soldered directly to components. All other pins connected to PC board.) FIGURE 9. Air Wiring BIAS CURRENT TESTING The test method of Figure 10 is appropriate for bench-testing ...

Page 12

Typical Single-Supply Applications Oscillator frequency is determined by R1, R2, C1, and C2 1/2 RC OSC where and C2. This circuit, as shown, oscillates at 2.0 kHz with a ...

Page 13

... Hz High-Pass Filter (2 dB Dip DS011227- 0.895 Gain = Low-Pass Filter (Maximally Flat, Dual Supply Only) 8-Pin DIP/SO DS011227-1 Temperature Range Military Industrial −40˚C to +85˚C LPC661AIM LPC661IM LPC661AMN LPC661AIN LPC661IN 13 DS011227-22 DS011227-23 NSC Transport Drawing Media M08A Tape and Reel Rail ...

Page 14

... Physical Dimensions Order Number LPC661AIN, LPC661IN or LPC661AMN www.national.com inches (millimeters) unless otherwise noted 8-Pin Small Outline Molded Package (M) Order Number LPC661AIM or LPC661IM NS Package Number M08A 8-Pin Molded Dual-In-Line Package (N) NS Package Number N08E 14 ...

Page 15

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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