lmc6442imx National Semiconductor Corporation, lmc6442imx Datasheet

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lmc6442imx

Manufacturer Part Number
lmc6442imx
Description
Dual Micropower Rail-to-rail Output Single Supply Operational Amplifier
Manufacturer
National Semiconductor Corporation
Datasheet

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© 2005 National Semiconductor Corporation
LMC6442
Dual Micropower Rail-to-Rail Output Single Supply
Operational Amplifier
General Description
The LMC6442 is ideal for battery powered systems, where
very low supply current (less than one microamp per ampli-
fier) and Rail-to-Rail output swing is required. It is character-
ized for 2.2V to 10V operation, and at 2.2V supply, the
LMC6442 is ideal for single (Li-Ion) or two cell (NiCad or
alkaline) battery systems.
The LMC6442 is designed for battery powered systems that
require long service life through low supply current, such as
smoke and gas detectors, and pager or personal communi-
cations systems.
Operation from single supply is enhanced by the wide com-
mon mode input voltage range which includes the ground (or
negative supply) for ground sensing applications. Very low (5
fA, typical) input bias current and near constant supply cur-
rent over supply voltage enhance the LMC6442’s perfor-
mance near the end-of-life battery voltage.
Designed for closed loop gains of greater than plus two (or
minus one), the amplifier has typically 9.5 KHz GBWP (Gain
Bandwidth Product). Unity gain can be used with a simple
compensation circuit, which also allows capacitive loads of
up to 300 pF to be driven, as described in the Application
Notes section.
Connection Diagram
DS100064
Top View
Features
(Typical, V
n Output Swing to within 30 mV of supply rail
n High voltage gain
n Gain Bandwidth Product
n Guaranteed for:
n Low Supply Current
n Input Voltage Range
n 2.1 µW/Amplifier
n Stable for A
Applications
n Portable instruments
n Smoke/gas/CO/fire detectors
n Pagers/cell phones
n Instrumentation
n Thermostats
n Occupancy sensors
n Cameras
n Active badges
S
= 2.2V)
10006440
V
≥ +2 or A
V
≤ −1
Power consumption
−0.3V to V
0.95 µA/Amplifier
2.2V, 5V, 10V
www.national.com
March 2005
9.5 KHz
103 dB
+
-0.9V

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lmc6442imx Summary of contents

Page 1

... KHz GBWP (Gain Bandwidth Product). Unity gain can be used with a simple compensation circuit, which also allows capacitive loads 300 driven, as described in the Application Notes section. Connection Diagram © 2005 National Semiconductor Corporation Features (Typical 2.2V Output Swing to within supply rail ...

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) Differential Input Voltage Voltage at Input/Output Pin + − Supply Voltage (V − ...

Page 3

Electrical Characteristics Unless otherwise specified, all limits guaranteed for T Boldface limits apply at the temperature extremes. Symbol Parameter AC Electrical Characteristics SR Slew Rate (Note 8) GBWP Gain-Bandwidth Product φ Phase Margin (Note 15 Electrical Characteristics ...

Page 4

Electrical Characteristics Unless otherwise specified, all limits guaranteed for T Boldface limits apply at the temperature extremes. Symbol Parameter AC Electrical Characteristics SR Slew Rate (Note 8) GBWP Gain-Bandwidth Product φ Phase Margin m THD Total Harmonic Distortion 10V ...

Page 5

Electrical Characteristics Unless otherwise specified, all limits guaranteed for T Boldface limits apply at the temperature extremes. Symbol Parameter AC Electrical Characteristics SR Slew Rate(Note 8) GBWP Gain-Bandwidth Product φ Phase Margin (Note 15 Input-Referred R n ...

Page 6

Typical Performance Characteristics Total Supply Current vs. Supply Voltage Total Supply Current vs. Supply Voltage (Positive Input Overdrive) Offset Voltage vs. Common Mode Voltage (V = 2.2V) S www.national.com V = 5V, Single Supply Total Supply Current vs. ...

Page 7

Typical Performance Characteristics specified (Continued) Offset Voltage vs. Common Mode Voltage (V = 10V Swing Towards V vs. Supply Voltage Output Source Current vs. Output Voltage V = 5V, Single Supply Swing Towards V 10006442 Swing ...

Page 8

Typical Performance Characteristics specified (Continued) Maximum Output Voltage vs. Load Resistance Open Loop Gain/Phase vs. Frequency Open Loop Gain/Phase vs. Frequency For Various 100 KΩ www.national.com V = 5V, Single Supply Large ...

Page 9

Typical Performance Characteristics specified (Continued) Phase Margin (Worst Case) vs. Supply Voltage PSRR vs. Frequency Negative Slew Rate vs. Supply Voltage V = 5V, Single Supply CMRR vs. Frequency 10006423 Positive Slew Rate vs. Supply Voltage 10006415 Cross-Talk ...

Page 10

Typical Performance Characteristics specified (Continued) Input Voltage Noise vs. Frequency THD+N vs. Frequency Maximum Output Swing vs. Frequency www.national.com V = 5V, Single Supply Output Impedance vs. Frequency 10006416 THD+N vs. Amplitude 10006428 Small Signal Step Response (A ...

Page 11

Typical Performance Characteristics specified (Continued) Large Signal Step Response ( 100 pF Small Signal Step Response (A = +1) For Various 5V, Single Supply Small Signal Step Response ...

Page 12

Applications Information USING LMC6442 IN UNITY GAIN APPLICATIONS LMC6442 is optimized for maximum bandwidth and minimal external components when operating at a minimum closed loop gain of +2 (or −1). However also possible to operate the device in ...

Page 13

Applications Information Phase Margin if the output does not swing close to V dependence of Phase Margin on output voltage is minimized as long as the output load about 1MΩ or less. L Output Phase Reversal: The ...

Page 14

Application Circuits Micropower Single Supply Voltage to Frequency Converter + < 5V µA, f/V = 4.3 (Hz/ www.national.com Gain Stage with Current Boosting 10006454 14 10006445 10006446 ...

Page 15

... Application Circuits (Continued) Ordering Information Temperature Range Industrial Package −40˚C to +85˚C LMC6442AIM LMC6442AIMX 8-Pin SOIC LMC6442IM LMC6442IMX 8-Pin DIP LMC6442IN 8-Pin CDIP — 10-Pin SOIC — Offset Nulling Schemes Military −55˚C to +125˚C Package Marking — LMC6442AIM — ...

Page 16

Physical Dimensions unless otherwise noted 8-Lead (0.150" Wide) Molded Small Outline Package, JEDEC www.national.com inches (millimeters) NS Package Number M08A 8-Lead (0.300" Wide) Molded Dual-In-Line Package NS Package Number N08E 16 ...

Page 17

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. For the most current product information ...

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