TEXAS INSTRUMENTS OPA379, OPA2379, OPA4379 Technical data

OPA379

OPA2379

OPA4379

SBOS347C − NOVEMBER 2005 − REVISED AUGUST 2006

1.8V, 2.9 A, 90kHz, Rail-to-Rail I/O

OPERATIONAL AMPLIFIERS

FEATURES

DLOW NOISE: 2.8 VPP

DmicroPower: 5.5 A (max)

DLOW OFFSET VOLTAGE: 1.5mV (max)

DDC PRECISION:

−CMRR: 100dB

−PSRR: 2 V/V

−A OL: 120dB

DWIDE SUPPLY VOLTAGE RANGE: 1.8V to 5.5V

DmicroSize PACKAGES

APPLICATIONS

DBATTERY-POWERED INSTRUMENTS

DPORTABLE DEVICES

DMEDICAL INSTRUMENTS

DESCRIPTION

The OPA379 family of micropower, low-voltage operational amplifiers is designed for battery-powered applications. These amplifiers operate on a supply voltage as low as 1.8V. High-performance, single-supply operation with rail-to-rail capability makes the OPA379 family useful for a wide range of applications.

In addition to microSize packages, the OPA379 family of op amps features impressive bandwidth (90kHz), low bias current (25pA), and low noise (80nV/√Hz) relative to the very low quiescent current (5.5 A max).

The OPA379 (single) is available in SC70-5, SOT23-5, and SO-8 packages. The OPA2379 (dual) comes in SOT23-8 and SO-8 packages. The OPA4379 (quad) is offered in a TSSOP-14 package. All versions are specified from −40 °C to +125°C.

OPAx379 RELATED PRODUCTS

D HANDHELD TEST EQUIPMENT

FEATURES

PRODUCT

1 A, 70kHz, 2mV VOS, 1.8V to 5.5V Supply

OPAx349

1 A, 5.5kHz, 390 V VOS, 2.5V to 16V Supply

TLV240x

1 A, 5.5kHz, 0.6mV VOS, 2.5V to 12V Supply

TLV224x

7 A, 160kHz, 0.5mV VOS, 2.7V to 16V Supply

TLV27Lx

7 A, 160kHz, 0.5mV VOS, 2.7V to 16V Supply

TLV238x

20 A, 350kHz, 2mV VOS, 2.3V to 5.5V Supply

OPAx347

20 A, 500kHz, 550 V VOS, 1.8V to 3.6V Supply

TLV276x

VCC

45 A, 1MHz, 1mV VOS, 2.1V to 5.5V Supply

OPAx348

1/2

C2

OPA2379

C

C1

RF

REF

S

VCC

W

R

B

RL

R1

1/2

VOUT

OPA2379

R1

OPA2379 in Portable Gas Meter Application

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date. Products	Copyright 2005−2006, T exas Instruments Incorporated
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.

www.ti.com

OPA379

OPA2379

OPA4379

www.ti.com

SBOS347C − NOVEMBER 2005 − REVISED AUGUST 2006

ABSOLUTE MAXIMUM RATINGS(1)

This integrated circuit can be damaged by ESD. Texas

Instruments recommends that all integrated circuits be

Supply Voltage . . . . . .

. . . .

. . .

. . . . . . . . . . . .

. . . . . .

.

. . .

. . . . +7V

handled with appropriate precautions. Failure to observe

Signal Input Terminals,

Voltage(2)

−0.5V to (V+) + 0.5V

proper handling and installation procedures can cause damage.

. . . . . . . . .Current(2)

. . . . . .

.

. . .

. ±10mA

ESD damage can range from subtle performance degradation to

Output Short-Circuit(3) .

. . .

. . .

. . . . . . . . . . . .

. . . . . .

.

Continuous

complete device failure. Precision integrated circuits may be more

Operating Temperature

−40 °C to +125°C

susceptible to damage because very small parametric changes could

. . .

. . .

. . . . . . . . . . . .

cause the device not to meet its published specifications.

Storage Temperature

−65 °C to +150°C

. . .

. . .

. . . . . . . . . . . .

Junction Temperature . .

. . .

. . .

. . . . . . . . . . . .

. . . . . .

.

. . .

. +150°C

ORDERING INFORMATION(1)

ESD Rating

Human Body Model

2000V

PACKAGE

PACKAGE

. . .

. . .

. . . . . . . . . . . .

. . . . . .

.

. . .

PRODUCT

PACKAGE-LEAD

DESIGNATOR

MARKING

Charged Device Model

1000V

. . . . . . . . . . . .

. . . . . .

.

. . .

OPA379

SC70−5

DCK

AYR

(1) Stresses above these ratings may cause permanent damage.

OPA379

SOT23−5

DBV

AYQ

Exposure to absolute maximum conditions for extended periods

OPA379

SO−8

D

OPA379A

may degrade device reliability. These are stress ratings only, and

functional operation of the device at these or any other conditions

OPA2379(2)

SOT23−8

DCN

B61

beyond those specified is not supported.

OPA2379

SO−8

D

OPA2379A

(2) Input terminals are diode-clamped to the power-supply rails.

OPA4379

TSSOP−14

PW

OPA4379A

Input signals that can swing more than 0.5V beyond the supply

(1) For the most current package and ordering information, see the

rails should be current-limited to 10mA or less.

Package Option Addendum at the end of this document, or see

(3) Short-circuit to ground, one amplifier per package.

the TI web site at www.ti.com.

(2) Available Q4, 2006.

PIN CONFIGURATIONS

OPA379

OPA379

OPA379

V+

+IN

1

5

OUT

1

5

V+

NC(1)

1

8

NC(1)

V−

2

V−

2

− IN

2

7

V+

−IN

OUT

3

4

+IN

3

4

− IN

+IN

3

6

OUT

V−

NC(1)

SC70−5

4

5

SOT23−5

SO−8

			OPA2379
	OUT A	1		8	V+
	− IN
		2	B61	7	OUT B
					−IN B
	+IN	3		6
	V−
		4		5	+IN B
			SOT23−8 (2)(3)

NOTES:

(1) NC denotes no internal connection.

		OPA2379
					OUT A
OUT A	1		8	V+
−IN A					− IN A
	2		7	OUT B
				−IN B	+IN A
+IN A	3		6
V−					V+
	4		5	+IN B
					+IN B
		SO−8
					− IN B
					OUT B

(2)Pin 1 of the SOT23−8 package is determined by orienting the package marking as shown.

(3)Available Q4, 2006.

	OPA4379
1		14	OUT D
			− IN D
2		13
3		12	+IN D
			V−
4		11
5		10	+IN C
			− IN C
6		9
7		8	OUT C
	TSSOP−14

2

	OPA379
	OPA2379
www.ti.com	OPA4379

SBOS347C − NOVEMBER 2005 − REVISED AUGUST 2006

ELECTRICAL CHARACTERISTICS: VS = +1.8V TO +5.5V

Boldface limits apply over the specified temperature range indicated.

At TA = +25°C, RL = 25kΩ connected to VS/2, and VCM < (V+) − 1V, unless otherwise noted.

			OPA379, OPA2379, OPA4379
PARAMETER		CONDITIONS	MIN	TYP		MAX	UNIT
OFFSET VOLTAGE
Initial Offset Voltage	VOS	VS = 5V		0.4		1.5	mV
Over −40 °C to +125°C						2	mV
Drift, −40 °C to +85°C	dVOS/dT			1.5			µV/°C
−40 °C to +125°C				2.7			µV/°C
vs Power Supply	PSRR			2		10	µV/V
Over −40 °C to +125°C						20	µV/V
INPUT VOLTAGE RANGE
Common-Mode Voltage Range	VCM		(V−) − 0.1 to (V+) + 0.1				V
Common-Mode Rejection Ratio(1)	CMRR	(V−) < V CM < (V+) − 1V	90				dB
				100
Over −40 °C to +85°C		(V−) < V CM < (V+) − 1V	80				dB
Over −40 °C to +125°C		(V−) < V CM < (V+) − 1V	62				dB
INPUT BIAS CURRENT
Input Bias Current	IB	VS = 5V, VCM < = VS/2		±5		±50	pA
Input Offset Current	IOS	VS = 5V		±5		±50	pA
INPUT IMPEDANCE				1013 || 3
Differential							Ω || pF
Common-Mode				1013 || 6			Ω || pF
NOISE
Input Voltage Noise, f = 0.1Hz to 10Hz				2.8			µVPP
Input Voltage Noise Density, f = 1kHz	en			80			nV/√Hz
Input Current Noise Density, f = 1kHz	in			1			fA/√	Hz
OPEN-LOOP GAIN
Open-Loop Voltage Gain	AOL	VS = 5V, RL = 25kΩ, 100mV < VO < (V+) − 100mV	100	120			dB
Over −40 °C to +125°C		VS = 5V, RL = 25kΩ, 100mV < VO < (V+) − 100mV	80				dB
		VS = 5V, RL = 5kΩ, 500mV < VO < (V+) − 500mV	100	120			dB
Over −40 °C to +125°C		VS = 5V, RL = 5kΩ, 500mV < VO < (V+) − 500mV	80				dB
OUTPUT
Voltage Output Swing from Rail		RL = 25kΩ		5		10	mV
Over −40 °C to +125°C		RL = 25kΩ				15	mV
		RL = 5kΩ		25		50	mV
Over −40 °C to +125°C		RL = 5kΩ		±5		75	mV
Short-Circuit Current	ISC						mA
Capacitive Load Drive	CLOAD		See Typical Characteristics Curve				Ω
Closed-Loop Output Impedance	ROUT	G = 1, f = 1kHz, IO = 0		10
Open-Loop Output Impedance	RO	f = 100kHz, IO = 0		28			kΩ
FREQUENCY RESPONSE		CLOAD = 30pF
Gain Bandwidth Product	GBW			90			kHz
Slew Rate	SR	G = +1		0.03			V/µs
Overload Recovery Time		VIN S GAIN > VS		25			µs
Turn-On Time	tON			1			ms
POWER SUPPLY
Specified/Operating Voltage Range	VS		1.8			5.5	V
Quiescent Current per Amplifier	IQ	VS = 5.5V, IO = 0		2.9		5.5	µA
Over −40 °C to +125°C						10	µA
TEMPERATURE
Specified/Operating Range			−40			+125	°C
Storage Range			−65			+150	°C
Thermal Resistance	qJA						°C/W
SC70−5				250
SOT23−5				200			°C/W
SOT23−8, TSSOP−14, SO−8				150			°C/W

(1) See Typical Characteristic, Common-Mode Rejection Ratio vs Frequency.

3

OPA379

OPA2379

OPA4379	www.ti.com
SBOS347C − NOVEMBER 2005 − REVISED AUGUST 2006

TYPICAL CHARACTERISTICS

At TA = +25°C, VS = 5V, RL = 25kΩ connected to VS/2, unless otherwise noted.

Gain (dB)

	COMMON−MODE AND
OPEN−LOOP GAIN AND PHASE	POWER SUPPLY REJECTION RATIO
vs FREQUENCY	vs FREQUENCY

120						0			120
100						− 30		(dB)	100
						− 60			80			−PSRR
80							(Phase)	PSRRandCMRR				CMRR
												+PSRR
60						− 90			60
40						− 120			40
20						− 150			20
0						− 180			0
0.1	1	10	100	1k	10k	100k			0.1	1	10	100	1k	10k	100k
			Frequency (Hz)									Frequency (Hz)

PP

Output Voltage (V )

MAXIMUM OUTPUT VOLTAGE vs FREQUENCY

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

1k

10k

100k

Frequency (Hz)

Quiescent Current ( A)

QUIESCENT CURRENT vs SUPPLY VOLTAGE

3.5

3.0

2.5

2.0

1.5

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

Supply Voltage (V)

					OUTPUT VOLTAGE
				vs OUTPUT CURRENT
	2.5
	2.0
	1.5	VS = ±2.5V										(mA)
	1.0
OUT												Current
	0.5
(V)			+125_C			+85_C		+25_C		− 40_C
	0
												Short−Circuit
V	− 1.5
	− 0.5
	− 1.0
	− 2.0
	− 2.5
	0	1	2	3	4	5	6	7	8	9	10
						IOUT (mA)

SHORT−CIRCUIT CURRENT vs SUPPLY VOLTAGE

25

+ISC

20

−ISC

15

10

5

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

Supply Voltage (V)

4

	OPA379
	OPA2379
www.ti.com	OPA4379

SBOS347C − NOVEMBER 2005 − REVISED AUGUST 2006

TYPICAL CHARACTERISTICS (continued)

At TA = +25°C, VS = 5V, RL = 25kΩ connected to VS/2, unless otherwise noted.

OFFSET VOLTAGE vs COMMON−MODE VOLTAGE vs TEMPERATURE

15000

12500

Unit 1

CMRR Specified Range

	10000
(µV)	7500
	5000
Voltage	2500
	0
	− 2500
Offset
	− 5000
	− 7500
			− 40_C
	−10000
			+85_C
	−12500						Unit 2
			+125_C
	−15000
	−0.1	0	1	2	3	4	5	5.1
			Common−Mode Voltage (V)
			OFFSET VOLTAGE DRIFT DISTRIBUTION
				(− 40_C to +85_C)
	Population
		≤1	≤2	≤ 3	≤4	≤ 5	> 5
			Offset Voltage Drift (µV/_C)

OFFSET VOLTAGE

PRODUCTION DISTRIBUTION

Population
−1500	−1350	−1200	−1050	−900	−750	−600	−450 −300 −150 0 150 300 450	600	750	900	1050	1200	1350	1500
							Offset Voltage (µV)

OFFSET VOLTAGE DRIFT DISTRIBUTION

		(−40_C to +125_C)
Population
≤1	≤ 2	≤3	≤4	≤ 5	> 5

Offset Voltage Drift (µV/_C)

I (µA) Q

QUIESCENT CURRENT	QUIESCENT CURRENT
vs TEMPERATURE	PRODUCTION DISTRIBUTION

5.0

	4.5
	4.0
	3.5								Population
	3.0
	2.5
	2.0
	1.5
	1.0								1.00	1.20	1.40	1.60	1.80	2.00	2.20	2.40	2.60	2.80	3.00	3.20	3.40	3.60	3.80	4.00	4.20	4.40	4.60	4.80	5.00
	−50	− 25	0	25	50	75	100	125
				Temperature (_C)											Quiescent Current (µA)

5

OPA379

OPA2379

OPA4379	www.ti.com
SBOS347C − NOVEMBER 2005 − REVISED AUGUST 2006

TYPICAL CHARACTERISTICS (continued)

At TA = +25°C, VS = 5V, RL = 25kΩ connected to VS/2, unless otherwise noted.

INPUT BIAS CURRENT
vs TEMPERATURE	0.1Hz TO 10Hz NOISE

	10000
	1000
(pA)	100
Current
	10
Bias	1
Input
	0.1
	0.01
	− 50	−25	0	25	50	75	100	125
				Temperature (_C)

1 V/div

2.5s/div

NOISE vs FREQUENCY

			1000
		(nV/√Hz)	100
		Noise
			10

1

10

100

1k

10k

Frequency (Hz)

SMALL−SIGNAL STEP RESPONSE

Overshoot (%)

SMALL−SIGNAL OVERSHOOT vs CAPACITIVE LOAD

60

50

40

30

G = +1

20

10

G = −1

0

10

100

1000

Capacitive Load (pF)

LARGE−SIGNAL STEP RESPONSE

20mV/div

500mV/div

25µs/div

50µs/div

6