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Уфимский Государственный Авиационный Технический Университет

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Электроника в измерительных устройствах

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MAX480

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Not Recommended for New Designs

This product was manufactured for Maxim by an outside wafer foundry using a process that is no longer available. It is not recommended for new designs. The data sheet remains available for existing users.

A Maxim replacement or an industry second-source may be available. Please see the QuickView data sheet for this part or contact technical support for assistance.

For further information, contact Maxim’s Applications Tech Support.

19-2772; Rev 4; 4/07

High-Precision, Low-Voltage,

Micropower Op Amp

General Description

The MAX480 is a precision micropower operational amplifier with flexible power-supply capability. Its guaranteed 140µV maximum offset voltage (25µV typ) is the lowest of any micropower op amp. Similarly, input bias current, input offset current, and drift specifications are within tight limits.

Both the input and output voltage ranges include the negative supply rail, allowing maximum signal range capability in single-supply applications. The MAX480 operates with either a single supply ranging from +1.6V to +36V or dual supplies from ±0.8V to ±18V. The MAX480 consumes less than 20µA, allowing operation in excess of 10,000 hours from a 250mA-hr lithium coin cell. Even with a minimal quiescent current, the amplifier sinks or sources 5mA from its output.

The MAX480 is available in 8-pin DIP and SO packages in commercial, extended, and military temperature ranges.

Applications

Precision Micropower Amplifiers

Micropower Signal Processing

Battery-Powered Analog Circuits

Features

♦Singleor Dual-Supply Operation: +1.6V to +36V, ±0.8V to ±18V

♦True Single-Supply Operation: Input and Output Voltage Ranges Include Ground

♦2.0μV/°C Max Offset Voltage Drift

♦20μA Max Supply Current

♦5mA Min Output Drive

♦140μV Max Input Offset Voltage

♦3nA Max Input Bias Current

♦500V/mV Min Open-Loop Gain

♦Standard 741 Pinout with Nulling to V-

Ordering Information

PART	TEMP RANGE	PIN-PACKAGE
MAX480CPA	0°C to +70°C	8 Plastic DIP

MAX480CSA	0°C to +70°C	8 SO

MAX480EPA	-40°C to +85°C	8 Plastic DIP

MAX480ESA	-40°C to +85°C	8 SO

MAX480MJA	-55°C to +125°C	8 CERDIP

MAX480

Typical Operating Circuit

Pin Configuration

		V+ (5V)
				TOP VIEW
	R2
	10k
R1
10k	2	7
VIN	2
VIN			IN914
		MAX480	6	OUT
HP5082-2800				OUT
HP5082-2800	3
	3	4
		4	R3
			R3
			100k
SINGLE OP AMP FULL-WAVE RECTIFIER

NULL	1	8	N.C.
IN-	2	7	V+
		MAX480
IN+	3	6	OUT
V-	4	5	NULL

DIP/SO

________________________________________________________________ Maxim Integrated Products 1

Forpricing,free samplesdelivery,& theandlatestorderingliterature:information,http://wwwple.maximse contact-ic.com,Maxim/Dallasor phone 1-800Direct!-998-8800at .

For small orders, phone 408-737-7600 ext. 3468.

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

MAX480

High-Precision, Low-Voltage,

Micropower Op Amp

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (V+ to V-) ....................................................		±18V
Differential Input Voltage ........................	(V- - 20V) to (V+ + 20V)
Common-Mode Input Voltage ................	(V- - 20V) to (V+ + 20V)
Output Short-Circuit Duration ........................................		Indefinite
Continuous Power Dissipation
Plastic DIP (derate 9.09mW/°C above +70°C)		.............727mW
SO (derate 5.88mW/°C above +70°C) ..............................		471mW
CERDIP (derate 8.0mW/°C above +70°C)....................		640mW

Operating Temperature Ranges
MAX480C_A.........................................................	0°C to +70°C
MAX480E_A......................................................	-40°C to +85°C
MAX480MJA ...................................................	-55°C to +125°C
Junction Temperature (TJ).................................	-65°C to +150°C
Storage Temperature Range .............................	-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................	+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VS = ±1.5V to ±15V, TA = +25°C, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input Offset Voltage

VOS

140

µV

Input Offset Current

IOS

VCM = 0

0.2

Input Bias Current

VCM = 0

103

VS = ±15V,

RL = 100kΩ

500

1200

RL = 10kΩ

200

600

VO = ±10V

Large-Signal Voltage Gain

AVO

RL = 2kΩ

250

V/mV

V+ = 5V, V- = 0,

RL = 100kΩ

100

400

1V < VO < 4V

RL = 10kΩ

180

Input Voltage

IVR

V+ = 5V, V- = 0

0/4

VS = ±15V (Note 1)

-15/13.5

VS = ±15V

RL = 10kΩ

±14

±14.2

Output Voltage Swing

RL = 2kΩ

±10

±12

VOH

V+ = 5V, V- = 0, RL = 2kΩ

4.0

4.2

VOL

V+ = 5V, V- = 0, RL = 10kΩ

100

500

µV

Common-Mode Rejection Ratio

CMRR

V+ = 5V, V- = 0, 0 < VCM < 4V

110

VS = ±15V, -15V < VCM < 13.5V

130

Power-Supply Rejection Ratio

PSRR

1.0

µV/V

Slew Rate

VS = ±15V

V/ms

Supply Current

ISY

VS = ±1.5V

µA

VS = ±15V

Capacitive Load Stability

AV = +1V/V, no oscillations (Note 2)

650

250

Input Noise Voltage

enp-p

fO = 0.1Hz to 10Hz, VS = ±15V

µVp-p

Differential-Mode Input Resistance

RIN

VS = ±15V

MΩ

Common-Mode Input Resistance

RINCM

VS = ±15V

GΩ

2 _______________________________________________________________________________________

High-Precision, Low-Voltage,

Micropower Op Amp

ELECTRICAL CHARACTERISTICS

(VS = ±1.5V to ±15V, TA = TMIN to TMAX, unless otherwise noted.)

PARAMETER

Input Offset

Voltage

Input Offset

Voltage Drift

Input Offset

Current

Input Bias

Current

Large-Signal

Voltage Gain

Input Voltage

Range

Output Voltage

Swing

Common-Mode

Rejection Ratio

Power-Supply

Rejection Ratio

Supply Current

SYMBOL

VOS

TCVOS

IOS

AVO

IVR

VOH

VOL

CMRR

PSRR

ISY

CONDITIONS		MAX480C					MAX480E					MAX480M					UNITS
CONDITIONS		MIN	TYP	MAX			MIN	TYP	MAX			MIN	TYP	MAX			UNITS
		MIN	TYP	MAX			MIN	TYP	MAX			MIN	TYP	MAX

			40	220				50	250				70	300			µV

(Note 2)			0.3	2.0				0.3	2.0				0.3	2.0			µV/°C

VCM = 0			0.2			5.0		0.3		7.0			0.5		102..0		nA
VCM = 0			0.2			2		0.3		2.0			0.5		102..0		nA

VCM = 0			1		15			2			205		3			307	nA
VCM = 0			1		3			2			205		3			307	nA

VS = ±15V,	RL = 100kΩ	350	950				350	800				60	400

	RL = 10kΩ	130	400				130	400				45	240
V = ±10V	RL = 10kΩ	130	400				130	400				45	240

	RL = 2kΩ	55	125				55	150				30	110				V/mV
	RL = 2kΩ	55	125				55	150				30	110

V+ = 5V,	RL = 100kΩ	50	360				50	280				35	200
V+ = 5V,	RL = 100kΩ	50	360				50	280				35	200
V- = 0,
V- = 0,	RL = 10kΩ	30	150				30	140				22	110
1V < VO < 4V	RL = 10kΩ	30	150				30	140				22	110

V+ = 5V, V- = 0		0/3.5					0/3.5					0/3.5					V

VS = ±15V (Note 1)		-15/13.5					-15/13.5					-15/13.5
VS = ±15V (Note 1)		-15/13.5					-15/13.5					-15/13.5

VS = ±15V	RL = 10kΩ	±13.5	±14				±13.5	±14				±13.5 ±13.7

	RL = 2kΩ	±9.5 ±11.8					±10.5	±11.8				±10.5 ±11.5
	RL = 2kΩ	±9.5 ±11.8					±10.5	±11.8				±10.5 ±11.5
							9.5										V
V+ = 5V, V- = 0		3.9	4.1				3.9	4.1				3.9	4.1				V
V+ = 5V, V- = 0
RL = 2kΩ
RL = 2kΩ

V+ = 5V, V- = 0			100	500				100	500				100	500			µV
RL = 10kΩ			100	500				100	500				100	500			µV
RL = 10kΩ

V+ = 5V, V- = 0,		85	110				85	110				80	105
0 < VCM < 3.5V		85	110				85	110				80	105
0 < VCM < 3.5V																	dB

VS = ±15V,		90	120				90	120				85	115
VS = ±15V,
-15V < VCM < 13.5V
-15V < VCM < 13.5V

			1.0	12				1.0	12				3.2	15			µV/V

VS = ±1.5V			12	25				13	25				15	25			µA

VS = ±15V			16	30				17	30				19	30

Note 1: Guaranteed by CMRR test. Note 2: Guaranteed by design.

MAX480

_______________________________________________________________________________________ 3

MAX480

High-Precision, Low-Voltage,

Micropower Op Amp

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

			INPUT OFFSET VOLTAGE							INPUT OFFSET CURRENT						INPUT BIAS CURRENT
				vs. TEMPERATURE							vs. TEMPERATURE						vs. TEMPERATURE
	100				MAX480-01		1.4					MAX480-02	1.2					MAX480-03
	100						1.4						1.2
		VS = ±15V					1.2		VS = ±15V						VS = ±15V
VOLTAGEOFFSETINPUT(μV)	80					CURRENTOFFSETINPUT(nA)	1.2						1.0
													1.0
							1.0						CURRENTBIASINPUT(nA)


	60						0.8						0.8
													0.8
													0.6


	40						0.6

													0.4

							0.4
	20

													0.2

							0.2



	0						0						0
	0						0	-75 -50 -25 0 25 50 75 100 125					0	-75 -50 -25 0 25 50 75 100 125
	-75 -50 -25 0 25 50 75 100 125							-75 -50 -25 0 25 50 75 100 125						-75 -50 -25 0 25 50 75 100 125
				TEMPERATURE (°C)							TEMPERATURE (°C)						TEMPERATURE (°C)
				SUPPLY CURRENT						OPEN-LOOP GAIN vs.						OPEN-LOOP GAIN AND
				vs. TEMPERATURE						SINGLE-SUPPLY VOLTAGE					PHASE SHIFT vs. FREQUENCY

	22	NO LOAD							MAX480-04		600							MAX480-05	140					VS = ±15V		MAX480-06
	20	NO LOAD											RL = 10kΩ
	20												RL = 10kΩ			TA = +25°C			120
	18										500					TA = +25°C			120					RL = 100kΩ
											500
CURRENTSUPPLY(μA)		VS = ±1.5V								LOOP-OPENGAIN (V/mV)								LOOP-OPENGAIN (dB)	40							0	SHIFTPHASE(DEGREES)
CURRENTSUPPLY(μA)	8	VS = ±1.5V								LOOP-OPENGAIN (V/mV)								LOOP-OPENGAIN (dB)	40							0	SHIFTPHASE(DEGREES)
	16										400						TA = +85°C		100
	14	VS = ±15V																	80		GAIN					45
	12	VS = ±15V									300						TA = +125°C
	12										300													PHASE		90
																			60
	10																		60
	10										200
											200															135
																										135
	6										100								20							180
	4										100															180


	2										0								0
	-75	-50	-25	0	25	50	75	100	125			0	5	10	15	20	25	30	0.1	1	10	100	1k	10k	100k
				TEMPERATURE (°C)										SINGLE-SUPPLY VOLTAGE (V)							FREQUENCY (Hz)

			CLOSED-LOOP GAIN										OUTPUT VOLTAGE SWING								OUTPUT VOLTAGE SWING
				vs. FREQUENCY							6			vs. LOAD RESISTANCE						16		vs. LOAD RESISTANCE
	60								MAX480-07		6								MAX480-08	16										MAX480-09
									MAX480-07			V- = 0							MAX480-08	14					POSITIVE SUPPLY					MAX480-09
		VS = ±15V								VOLTAGEOUTPUT SWING (V)	5	V+ = 5V													POSITIVE SUPPLY


-CLOSEDLOOP GAIN (dB)	40																		VOLTAGEOUTPUTSWING (V)	12						NEGATIVE SUPPLY
-CLOSEDLOOP GAIN (dB)	0										4								VOLTAGEOUTPUTSWING (V)	4
	20										3									10
	20										3									8
											2									6
																				6

											1									2



	-20										0																	VS = ±15V
																				0								VS = ±15V
																				0
	10	100				1k	10k	100k			100					1k	10k	100k		100				1k			10k		100k
					FREQUENCY (Hz)										LOAD RESISTANCE (Ω)								LOAD RESISTANCE (Ω)

4 _______________________________________________________________________________________

(TA = +25°C, unless otherwise noted.)

POWER-SUPPLY REJECTION

RATIO vs. FREQUENCY

(dB)	120				MAX480-10
	120
	100
			NEGATIVE SUPPLY
			NEGATIVE SUPPLY
REJECTION	80
REJECTION
SUPPLY-POWER
	40
	40	POSITIVE SUPPLY
		POSITIVE SUPPLY
	60
	60
	20


	1	10	100	1k

FREQUENCY (Hz)

High-Precision, Low-Voltage,

Micropower Op Amp

Typical Operating Characteristics (continued)

		COMMON-MODE REJECTION										NOISE VOLTAGE DENSITY
	140		RATIO vs. FREQUENCY										vs. FREQUENCY
	140							MAX480-11		1000								MAX480-12
(dB)REJECTIONMODE-COMMON	120					VS = ± 15V			Hz)(nV/DENSITYVOLTAGENOISE√	100						VS = ±15V




	100






	80									10




	60








	40									1



	1	10			100		1k			0.1	1		10		100		1k
				FREQUENCY (Hz)										FREQUENCY (Hz)

MAX480

CURRENT NOISE DENSITY (pA/√Hz)

100

0.1

CURRENT NOISE DENSITY vs. FREQUENCY

-13

VS = ±15V

MAX480

0.1

100

FREQUENCY (Hz)

SMALL-SIGNAL	LARGE-SIGNAL
TRANSIENT RESPONSE	TRANSIENT RESPONSE
MAX480-14	MAX480-15

100μs/div	1ms/div
VS = ±15V, AV = +1,	VS = ±15V, AV = +1,
RL = 10kΩ, CL = 500pF	RL = 10kΩ, CL = 500pF

_______________________________________________________________________________________ 5

MAX480

High-Precision, Low Voltage,
Micropower Op Amp
		V+				+15V
						+15V
IN-	2	7
IN-
			6	OUT	2	7
			6			7
		MAX480	4
	3	MAX480	4			6
IN+			5			6
			5			MAX480

					3
	1				3	4
	1	100k				4
		100k
						-15V
				V-

Figure 1. Offset Nulling Circuit

Figure 2. Burn-In Circuit

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)

SOICN .EPS

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

is a registered trademark of Maxim Integrated Products, Inc.

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