NSC LMC6574BIM, LMC6574AIMX, LMC6574AIM, LMC6572BIMMX, LMC6572BIMM Datasheet

December 1996

LMC6572 Dual/LMC6574 Quad

Low Voltage (2.7V and 3V) Operational Amplifier

General Description

Low voltage operation and low power dissipation make the LMC6574/2 ideal for battery-powered systems.

3V amplifier performance is backed by 2.7V guarantees to ensure operation throughout battery lifetime. These guarantees also enable analog circuits to operate from the same 3.3V supply used for digital logic.

Battery life is maximized because each amplifier dissipates only micro-watts of power.

The LMC6574/2 does not sacrifice functionality for low voltage operation. The LMC6574/2 generates 120 dB of open-loop gain just like a conventional amplifier, but the LMC6574/2 can do this from a 2.7V supply.

These amplifiers are designed with features that optimize low voltage operation. The output voltage swings rail-to-rail to maximize signal-to-noise ratio and dynamic signal range. The common-mode input voltage range extends from 800 mV below the positive supply to 100 mV below ground.

This device is built with National's advanced Double-Poly Silicon-Gate CMOS process.

LMC6572 is also available in MSOP package which is almost half the size of a SO-8 device.

Features

(Typical unless otherwise noted)

nGuaranteed 2.7V and 3V Performance

nRail-to-Rail Output Swing (within 5 mV of supply rail, 100 kΩ load)

nUltra-Low Supply Current: 40 µA/Amplifier

nLow Cost

nUltra-Low Input Current: 20 fA

nHigh Voltage Gain @ VS=2.7V, RL=100 kΩ: 120 dB

nSpecified for 100 kΩ and 5 kΩ loads

nAvailable in MSOP Package

Applications

nTransducer Amplifier

nPortable or Remote Equipment

nBattery-Operated Instruments

nData Acquisition Systems

nMedical Instrumentation

nImproved Replacement for TLV2322 and TLV2324

Connection Diagrams

8-Pin DIP/SO/MSOP

14-Pin DIP/SO

DS011934-1
Order Number LMC6572AIN, LMC6572BIN,
LMC6572AIM, LMC6572BIM or LMC6572BIMM
See NS Package Number N08E, M08A or MUA08A	DS011934-2
	Order Number LMC6574AIN, LMC6574BIN,
	LMC6574AIM or LMC6574BIM
	See NS Package Number N14A or M14A

Amplifier Operational 3V) and 7V.(2 Voltage Low Quad Dual/LMC6574 LMC6572

© 1999 National Semiconductor Corporation

DS011934

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Ordering Information

Package	Temperature Range	NSC Drawing	Transport
	Industrial, −40ÊC to +85ÊC		Media
8-Pin Molded DIP	LMC6572AIN, LMC6572BIN	N08E	Rail
8-Pin Small Outline	LMC6572AIM, LMC6572BIM	M08A	Rail
	LMC6572AIMX, LMC6572BIMX		Tape and Reel
8-Pin Mini SO	LMC6572BIMM	MUA08A	Rail
	LMC6572BIMMX		Tape and Reel
14-Pin Molded DIP	LMC6574AIN, LMC6574BIN	N14A	Rail
14-Pin Small Outline	LMC6574AIM, LMC6574BIM	M14A	Rail
	LMC6574AIMX, LMC6574BIMX		Tape and Reel

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Absolute Maximum Ratings (Note 1)

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

ESD Tolerance (Note 2)	2000V
Differential Input Voltage	±Supply Voltage
Voltage at Input/Output Pin	(V+) +0.3V,
	(V− ) −0.3V
Supply Voltage (V+ − V − )	12V
Current at Input Pin	±5 mA
Current at Output Pin (Note 3)	±10 mA
Current at Power Supply Pin	35 mA
Lead Temperature
(Soldering, 10 Seconds)	260ÊC
Storage Temperature Range	−65ÊC to +150ÊC

Junction Temperature (Note 4)

150ÊC

Operating Ratings (Note 1)

Supply Voltage	2.7V £ V+ £ 11V
Junction Temperature Range
LMC6572AI, LMC6572BI	−40ÊC	£ TJ £ +85ÊC
LMC6574AI, LMC6574BI	−40ÊC	£ TJ £ +85ÊC
Thermal Resistance (qJA)
N Package, 8-Pin Molded DIP		115ÊC/W
M Package, 8-Pin Surface Mount		193ÊC/W
MSOP Package, 8-Pin Mini SO		217ÊC/W
N Package, 14-Pin Molded DIP		81ÊC/W
M Package, 14-Pin Surface Mount		126ÊC/W

2.7V DC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for TJ = 25ÊC. V+ = 2.7V, V− = 0V, VCM = VO = V+/2 and RL > 1MW. Boldface limits apply at the temperature extremes.

Symbol	Parameter	Conditions			Typ	LMC6574AI	LMC6574BI	Units
					(Note 5)	LMC6572AI	LMC6572BI
						Limit	Limit
						(Note 6)	(Note 6)
VOS	Input Offset Voltage	V+ = 2.7V and 3V			0.5	3	7	mV
						3.5	7.5	Max
TCVOS	Input Offset Voltage				1.5			µV/ÊC
	Average Drift
IB	Input Current				0.02			pA
						10	10	Max
IOS	Input Offset Current				0.01			pA
						6	6	Max
RIN	Input Resistance				>1			Tera W
CIN	Common-Mode				3			pF
	Input Capacitance
CMRR	Common Mode	0V £ VCM £ 3.5V			75	63	60	dB
	Rejection Ratio	V+ = 5V				60	57	Min
+PSRR	Positive Power Supply	2.7V £ V+ £ 5V,			75	67	60	dB
	Rejection Ratio	V− = 0V				65	58	Min
−PSRR	Negative Power Supply	−2.7V £ V− £ −5V,			83	75	67	dB
	Rejection Ratio	V+ = 0V				73	65	Min
VCM	Input Common-Mode	V+ = 2.7V and 3V			−0.1	−0.05	−0.05	V
	Voltage Range	for CMRR ³ 50 dB				0	0	Max
					V+ − 0.8	V + − 1.0	V + − 1.0	V
						V+ − 1.3	V + − 1.3	Min
AV	Large Signal	RL = 100 kW		Sourcing	1000			V/mV
	Voltage Gain	(Note 7)
				Sinking	500			V/mV

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2.7V DC Electrical Characteristics (Continued)

Unless otherwise specified, all limits guaranteed for TJ = 25ÊC. V+ = 2.7V, V−				= 0V, VCM = VO = V+/2 and RL > 1MΩ. Bold-
face limits apply at the temperature extremes.
Symbol	Parameter	Conditions		Typ	LMC6574AI	LMC6574BI	Units
			(Note 5)		LMC6572AI	LMC6572BI
					Limit	Limit
					(Note 6)	(Note 6)
VO	Output Swing	V+ = 2.7V		2.695	2.68	2.65	V
		RL = 100 kΩ to V+/2			2.66	2.62	Min
				0.005	0.03	0.06	V
					0.05	0.09	Max
		V+ = 2.7V		2.66	2.55	2.45	V
		RL = 5 kΩ to V+/2			2.45	2.35	Min
				0.04	0.15	0.25	V
					0.25	0.35	Max
		V+ = 3V		2.995	2.98	2.95	V
		RL = 100 kΩ to V+/2			2.96	2.93	Min
				0.005	0.03	0.06	V
					0.05	0.09	Max
		V+ = 3V		2.96	2.85	2.75	V
		RL = 5 kΩ to V+/2			2.75	2.65	Min
				0.04	0.15	0.25	V
					0.25	0.35	Max
ISC	Output Short	Sourcing, VO = 0V		6.0	4.0	3.0	mA
	Circuit Current				3.0	2.0	Min
		Sinking, VO = 2.7V		4.0	3.0	2.5	mA
					2.0	1.5	Min
IS	Supply Current	Quad Package		160	240	240	µA
		V+ = +2.7V, VO = V+/2			280	280	Max
		Quad Package		160	240	240	µA
		V+ = +3V, VO = V+/2			280	280	Max
		Dual Package		80	120	120	µA
		V+ = +2.7V, VO = V+/2			140	140	Max
		Dual Package		80	120	120	µA
		V+ = +3V, VO = V+/2			140	140	Max

2.7V AC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for TJ = 25ÊC, V+ = 2.7V, V−				= 0V, VCM = VO = V+/2 and RL > 1 MΩ. Bold-
face limits apply at the temperature extremes.
Symbol	Parameter	Conditions		Typ	LMC6574AI	LMC6574BI	Units
				(Note 5)	LMC6572AI	LMC6572BI
					Limit	Limit
					(Note 6)	(Note 6)
SR	Slew Rate	V+ = 2.7V and 3V		90	30	30	V/ms
		(Note 8)			10	10	Min
GBW	Gain-Bandwidth Product	V+ = 3V		0.22			MHz
φm	Phase Margin			60			Deg
Gm	Gain Margin			12			dB
	Amp-to-Amp Isolation	(Note 9)		120			dB
en	Input-Referred	F = 1 kHz		45			nV/Ö
								Hz
	Voltage Noise	VCM = 1V
in	Input-Referred	F = 1 kHz		0.002			pA/Ö
								Hz

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