Analog Devices OP179GRT, OP179GS, OP179GRU Datasheet

a		Rail-to-Rail High Output
		Current Operational Amplifiers
		OP179/OP279

FEATURES

Rail-to-Rail Inputs and Outputs High Output Current: 60 mA

Single Supply: 5 V to 12 V Wide Bandwidth: 5 MHz High Slew Rate: 3 V/ s

Low Distortion: 0.01% Unity-Gain Stable

No Phase Reversal Short-Circuit Protected

Drives Capacitive Loads: 10 nF

APPLICATIONS

Multimedia

Telecom

DAA Transformer Driver

LCD Driver

Low Voltage Servo Control

Modems

FET Drivers

PIN CONFIGURATIONS

5-Lead SOT-23-5

(RT-5)

OUT A		OP179
	1	5	V–
V+	2
+IN A	3	4	IN A

8-Lead SOIC

(S Suffix)

NC	1	OP179	NC
		8
IN A	2	7	V+
+IN A	3	6	OUT A
V 4		5	NC

NC = NO CONNECT

GENERAL DESCRIPTION

The OP179 and OP279 are rail-to-rail, high output current, single-supply amplifiers. They are designed for low voltage applications that require either current or capacitive load drive capability. The OP179/OP279 can sink and source currents of

± 60 mA (typical) and are stable with capacitive loads to 10 nF.

Applications that benefit from the high output current of the OP179/OP279 include driving headphones, displays, transformers and power transistors. The powerful output is combined with a unique input stage that maintains very low distortion with wide common-mode range, even in single supply designs.

The OP179/OP279 can be used as a buffer to provide much greater drive capability than can usually be provided by CMOS outputs. CMOS ASICs and DAC often have outputs that can swing to both the positive supply and ground, but cannot drive more than a few milliamps.

Bandwidth is typically 5 MHz and the slew rate is 3 V/µs, making these amplifiers well suited for single supply applications that require audio bandwidths when used in high gain configurations. Operation is guaranteed from voltages as low as 4.5 V, up to 12 V.

REV. G

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

8-Lead SOIC and TSSOP

SO-8 (S) and RU-8

OUT A				V+
	1		8
IN A				OUT B
	2	OP279	7
+IN A				IN B
	3		6
				+IN B
V	4		5

Very good audio performance can be attained when using the OP179/OP279 in 5 volt systems. THD is below 0.01% with a 600 Ω load, and noise is a respectable 21 nV/√Hz. Supply current is less than 3.5 mA per amplifier.

The single OP179 is available in the 5-lead SOT-23-5 package. It is specified over the industrial (–40°C to +85°C) temperature range.

The OP279 is available in 8-lead TSSOP and SO-8 surface mount packages. They are specified over the industrial (–40°C to +85°C) temperature range.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: [phone]	www.analog.com
Fax: [phone]	© Analog Devices, Inc., 2002

OP179/OP279–SPECIFICATIONS

ELECTRICAL SPECIFICATIONS (@ VS = 5.0 V, VCM = 2.5 V, –40 C ≤ TA ≤ +85 C unless otherwise noted.)

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
INPUT CHARACTERISTICS
Offset Voltage					± 5
OP179	VOS	VOUT = 2.5 V				mV
OP279	VOS	VOUT = 2.5 V			± 4	mV
Input Bias Current	IB	VOUT = 2.5 V, TA = 25°C			± 300	nA
		VOUT = 2.5 V			± 700	nA
Input Offset Current	IOS	VOUT = 2.5 V, TA = 25°C			± 50	nA
		VOUT = 2.5 V			± 100	nA
Input Voltage Range	VCM		0		5	V
Common-Mode Rejection Ratio	CMRR	VCM = 0 V to 5 V	56	66		dB
Large Signal Voltage Gain	AVO	RL = 1 kΩ, 0.3 V ≤ VOUT ≤ 4.7 V	20			V/mV
Offset Voltage Drift	∆VOS/∆T			4		µV/°C
OUTPUT CHARACTERISTICS
Output Voltage High	VOH	IL = 10 mA Source	+4.8			V
Output Voltage Low	VOL	IL = 10 mA Sink, TA = 25°C			75	mV
		IL = 10 mA Sink			100	mV
Short-Circuit Limit	ISC	TA = 25°C	± 40			mA
Output Impedance	ZOUT	f = 1 MHz, AV = 1		22		Ω
POWER SUPPLY
Power Supply Rejection Ratio	PSRR	VS = 4.5 V to 12 V	70	88		dB
Supply Current/Amplifier	ISY	VOUT = 2.5 V			3.5	mA
Supply Voltage Range	VS		+4.5		+12	V
DYNAMIC PERFORMANCE		RL = 1 kΩ, 1 nF				V/µs
Slew Rate	SR			3
Gain Bandwidth Product	GBP			5		MHz
Phase Margin	φm			60		Degrees
Capacitive Load Drive		No Oscillation		10		nF
AUDIO PERFORMANCE
Total Harmonic Distortion	THD			0.01		%
Voltage Noise Density	en	f = 1 kHz		22		nV/√Hz

ELECTRICAL SPECIFICATIONS (@ VS = 5.0 V, –40 C ≤ TA ≤ +85 C unless otherwise noted.)

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
INPUT CHARACTERISTICS
Offset Voltage					± 5
OP179	VOS	VOUT = 0				mV
OP279	VOS	VOUT = 0			± 4	mV
Input Bias Current	IB	TA = 25°C			± 300	nA
					± 700	nA
Input Offset Current	IOS	TA = 25°C			± 50	nA
					± 100	nA
Input Voltage Range	VCM		–5		+5	V
Common-Mode Rejection Ratio	CMRR	VCM = –5 V to +5 V	56	66		dB
Large Signal Voltage Gain	AVO	RL = 1 kΩ, –4.7 V ≤ VOUT ≤ 4.7 V	20			V/mV
Offset Voltage Drift	∆VOS/∆T			3		µV/°C
OUTPUT CHARACTERISTICS		IL = 10 mA Source	+4.8			V
Output Voltage High	VOH
Output Voltage Low	VOL	IL = 10 mA Sink			–4.85	V
Short Circuit Limit	ISC	TA = 25°C	± 50			mA
Open-Loop Output Impedance	ZOUT	f = 1 MHz, AV = +1		22		Ω
POWER SUPPLY		VS = ±6 V, VOUT = 0 V
Supply Current/Amplifier	ISY				3.75	mA
DYNAMIC PERFORMANCE		RL = 1 kΩ, 1 nF		3		V/µs
Slew Rate	SR
Full-Power Bandwidth	BWp	1% Distortion				kHz
Gain Bandwidth Product	GBP			5		MHz
Phase Margin	φm			69		Degrees
NOISE PERFORMANCE	en p-p	0.1 Hz to 10 Hz		2		µV p-p
Voltage Noise
Voltage Noise Density	en	f = 1 kHz		22		nV/√Hz
Current Noise Density	in			1		pA/√Hz

Specifications subject to change without notice.

–2–

REV. G

OP179/OP279

ABSOLUTE MAXIMUM RATINGS

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 V

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 V Differential Input Voltage1 . . . . . . . . . . . . . . . . . . . . . . . . .± 1 V

Output Short-Circuit Duration to GND . . . . . . . . . . Indefinite Storage Temperature Range

S, RT, RU Package . . . . . . . . . . . . . . . . . . –65°C to +150°C Operating Temperature Range

OP179G/OP279G . . . . . . . . . . . . . . . . . . . . –40°C to +85°C Junction Temperature Range

S, RT, RU Package . . . . . . . . . . . . . . . . . . . –65°C to +150°C Lead Temperature Range (Soldering, 60 sec) . . . . . . . . 300°C

Package Types	JA2	JC	Unit
5-Lead SOT-23 (RT)	256	81	°C/W
8-Lead SOIC (S)	158	43	°C/W
8-Lead TSSOP (RU)	240	43	°C/W

NOTES

1The inputs are clamped with back-to-back diodes. If the differential input voltage exceeds 1 volt, the input current should be limited to 5 mA.

2θJA is specified for the worst-case conditions, i.e., θJA is specified for device soldered in circuit board for SOIC packages.

ORDERING GUIDE

Package	Temperature Range	Package Description	Package Option	Brand Code
OP179GRT	–40°C to +85°C	5-Lead SOT-23	RT-5	A2G
OP279GS	–40°C to +85°C	8-Lead SOIC	SO-8
OP279GRU	–40°C to +85°C	8-Lead TSSOP	RU-8

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the OP179/OP279 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE

REV. G

–3–

OP179/OP279 –Typical Performance Characteristics

	160	VS 5V							90
	140	TA 25 C						mA
		620 OP AMPS							80
	120							–
UNITS								CURRENTCIRCUIT-SHORT		VCM	2.5V	–ISC
	20
	100								70
	80											+ISC
	60								60
	40								50	VS 5V
	0								40
	–2.5		–1.5	–0.5	0.5	1.5	2.5		–50	–25	0	25	50	75	100
				INPUT OFFSET – mV							TEMPERATURE – C

TPC 1. Input Offset Distribution	TPC 2. Short-Circuit Current vs.
	Temperature

	400
	300		VS	5V
– nA								–40			C
	200
CURRENT	0
									+85 C
	100								+25 C
BIAS	–100
INPUT	–200
	–300
	–400
						2		3				4
	0		1										5

COMMON-MODE VOLTAGE – Volts

TPC 3. Input Bias Current vs. Common-Mode Voltage

3.0

VS 5V 2.5 TA 25 C

	– mV	2.0
	VOLTAGE
		1.5
	OFFSET
		1.0
		0.5
		0

0 1 2 3 4 5 COMMON-MODE VOLTAGE – Volts

TPC 4. Offset Voltage vs.

Common-Mode Voltage

	1000
									RL	2k
– V/mV	800
	600		VS 15V
GAIN
			0.3		VOUT		4.7V
LOOP-OPEN	400
	200							RL		1k
	0
			–25		0		25				50				75 100
	–50

TEMPERATURE – C

TPC 7. Open-Loop Gain vs. Temperature

	100
mA						–ISC
	90
–
CURRENT	80
CIRCUIT-SHORT								+ISC
	70
	60
			VS 5V
	50
					0	25		50		75 100
	–50 –25

TEMPERATURE – C

TPC 5. Short-Circuit Current vs. Temperature

	5
	4
– V s									+EDGE
	3
RATE
									–EDGE
SLEW	2
	1			VS 5V
				RL 1k
				CL +1nF
	0
				–25			0		25		50		75 100
	–50

TEMPERATURE – C

TPC 8. Slew Rate vs.

Temperature

	7
	6			VS 5V
				TA	25 C
– MHz	5
	4
BANDWIDTH
	2
	3
	1
	0
		0			1			2	3		4		5
				COMMON-MODE VOLTAGE – Volts

TPC 6. Bandwidth vs.

Common-Mode Voltage

	120	VS	2.5V	270
	100	TA	–40 C	225
		RL 2k		180
dB	80	GAIN
					Degrees–PHASE
GAINLOOP-OPEN–	0			0
	60			135
	40	PHASE		90
	20			45

–20							–45
–40							–90
100		1k	10k	100k	1M	10M
			FREQUENCY – Hz

TPC 9. Open-Loop Gain and

Phase vs. Frequency

–4–

REV. G

	6.5
– mA	6.0		VS 6V
CURRENT	5.5
			VS 5V
	5.0
SUPPLY
			VS 5V
	4.5		VCM 2.5V
	4.0
	–50	–25	0	25	50	75	100
			TEMPERATURE – C

TPC 10. Supply Current vs.

Temperature

	120
dB					VS	2.5V
	100				TA 25 C
–
REJECTION	80				–PSRR
	60
SUPPLY
			+PSRR
	40
POWER	20
	0
	10	100	1k	10k	100k	1M	10M
			FREQUENCY – Hz

TPC 13. Power Supply Rejection vs. Frequency

	12
Volts				TA 25 C
	10			VS 5V
				AVCL +1
–				RL	1k
SWING
	8
OUTPUT	6
	4
MAXIMUM
	2
	0
	1k	10k	100k	1M	10M

FREQUENCY – Hz

TPC 16. Maximum Output Swing vs. Frequency

	5
					+EDGE
s	4
					–EDGE
– V/
	3
RATE	2
SLEW

VS 5V

1RL 1k CL +1nF

0

–50 –25 0 25 50 75 100 TEMPERATURE – C

TPC 11. Slew Rate vs. Temperature

	6
Volts				TA 25 C
	5			VS 2.5V
				AVCL +1
–
				RL	1k
SWING	4
OUTPUT	3
	2
MAXIMUM
	1
	0
	1k	10k	100k	1M	10M
			FREQUENCY – Hz

TPC 14. Maximum Output

Swing vs. Frequency

50

AVCL +100

VS

2.5V

40

TA 25 C

dB

30

RL

1k

–

AVCL +10

GAIN

20

LOOP-CLOSED

10

0

AVCL +1

–10

–20

–30

1k

10k

100k

1M

10M

100M

FREQUENCY – Hz

TPC 17. Closed-Loop Gain vs. Frequency

OP179/OP279

120								270

	100	VS	2.5V	225
		TA	–40 C
dB	80	RL 2k		180
		CL 500pF
GAINLOOP-OPEN–		GAIN			Degrees–PHASE
	60			135
	40	PHASE		90
	20			45
	0			0

–20							–45
–40							–90
100		1k	10k	100k	1M	10M

FREQUENCY – Hz

TPC 12. Open-Loop Gain and Phase vs. Frequency

	180
	160	TA 25 C
		VS 2.5V OR 5V
	140
	120		AVCL 10 OR 100
–
IMPEDANCE	100
	80
	60
	40
	20					AVCL 1
	0
		100	1k	10k	100k	1M	10M
	10
			FREQUENCY – Hz

TPC 15. Closed-Loop Output Impedance vs. Frequency

80

TA

25 C

70

A

VCL +1

RL

1k

60

VS

2.5V

%

VIN 100mV p-p

–

50

OVERSHOOT

40

30

20

POSITIVE EDGE AND

NEGATIVE EDGE

10

0

0

2k

4k

6k

8k

10k

LOAD CAPACITANCE – pF

TPC 18. Small Signal Overshoot vs. Load Capacitance

REV. G

–5–