Analog Devices OP279, OP179 Datasheet

Rail-to-Rail High Output

OUT A

–IN A

+IN A

–V

+V

OUT B

–IN B

+IN B

OP279

a

FEATURES
Rail-to-Rail Inputs and Outputs
High Output Current: ⴞ60 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

Current Operational Amplifiers

OP179/OP279

PIN CONFIGURATIONS

5-Lead SOT-23-5

(RT-5)

OP179

1

OUT A

V+

2

3

+IN A

8-Lead SOIC and TSSOP

SO-8 (R) and RU-8

OUT A

1

2IN A

2

V2

OP279

3
4

+IN A

5

4

8
7
6
5

V–

2IN A

V+
OUT B
2IN B
+IN B

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, mak-

ing 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.

8-Lead Plastic DIP

(N-8)

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 cur-

rent 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 plastic DIP, TSSOP and
SO-8 surface mount packages. They are specified over the

industrial (–40°C to +85°C) temperature range.

REV. F

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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] World Wide Web Site: http://www.analog.com
Fax: [phone] © Analog Devices, Inc., 1999

OP179/OP279–SPECIFICATIONS

ELECTRICAL SPECIFICATIONS

(@ VS = +5.0 V, V

= 2.5 V, –40ⴗC ≤ TA ≤ +85ⴗC unless otherwise noted)

CM

Parameter␣ Symbol Conditions Min Typ Max Units

INPUT CHARACTERISTICS␣

Offset Voltage

V

OP179 V
OP279 V

Input Bias Current I

Input Offset Current I

Input Voltage Range V

OS

OS

B

OS

CM

Common-Mode Rejection Ratio CMRR V
Large Signal Voltage Gain A

VO

= 2.5 V ±5mV

OUT

V

= 2.5 V ±4mV

OUT

V

= 2.5 V, T

OUT

= 2.5 V ±700 nA

V

OUT

V

= 2.5 V, T

OUT

V

= 2.5 V ±100 nA

OUT

= +25°C ±300 nA

A

= +25°C ±50 nA

A

05V

= 0 V to 5 V 56 66 dB

CM

R

= 1 kΩ, 0.3 V ≤ V

L

≤ 4.7 V 20 V/mV

OUT

Offset Voltage Drift ∆VOS/∆T4µV/°C

OUTPUT CHARACTERISTICS␣

Output Voltage High V
Output Voltage Low V

Short Circuit Limit I
Output Impedance Z

OH

OL

SC

OUT

IL = 10 mA Source +4.8 V
IL = 10 mA Sink, T
I

= 10 mA Sink 100 mV

L

T

= +25°C ±40 mA

A

f = 1 MHz, A

= +25°C75mV

A

= 1 22 Ω

V

POWER SUPPLY␣

Power Supply Rejection Ratio PSRR V
Supply Current/Amplifier I
Supply Voltage Range V

SY

S

= +4.5 V to +12 V 70 88 dB

S

V

= 2.5 V 3.5 mA

OUT

+4.5 +12 V

DYNAMIC PERFORMANCE␣

Slew Rate SR R
Gain Bandwidth Product GBP 5 MHz

= 1 kΩ, 1 nF 3 V/µs

L

Phase Margin φm 60 Degrees

Capacitive Load Drive No Oscillation 10 nF

AUDIO PERFORMANCE␣

Total Harmonic Distortion THD 0.01 %
Voltage Noise Density e

n

f = 1 kHz 22 nV/√Hz

ELECTRICAL SPECIFICATIONS

(@ V

= ⴞ5.0 V, –40ⴗC ≤ TA ≤ +85ⴗC unless otherwise noted)

S

Parameter␣ Symbol Conditions Min Typ Max Units

INPUT CHARACTERISTICS␣

Offset Voltage

OP179 V
OP279 V

Input Bias Current I

Input Offset Current I

Input Voltage Range V
Common-Mode Rejection Ratio CMRR V
Large Signal Voltage Gain A

OS

OS

B

OS

CM

VO

V

= 0 ±5mV

OUT

V

= 0 ±4mV

OUT

T

= +25°C ±300 nA

A

T

= +25°C ±50 nA

A

±700 nA
±100 nA

–5 +5 V

= –5 V to +5 V 56 66 dB

CM

R

= 1 kΩ, –4.7 V ≤ V

L

≤ 4.7 V 20 V/mV

OUT

Offset Voltage Drift ∆VOS/∆T3µV/°C

OUTPUT CHARACTERISTICS␣

Output Voltage High V
Output Voltage Low V
Short Circuit Limit I
Open-Loop Output Impedance Z

OH

OL

SC

OUT

IL = 10 mA Source +4.8 V
IL = 10 mA Sink –4.85 V
T

= +25°C ±50 mA

A

f = 1 MHz, A

= +1 22 Ω

V

POWER SUPPLY␣

Supply Current/Amplifier I

SY

V

= ±6 V, V

S

= 0 V 3.75 mA

OUT

DYNAMIC PERFORMANCE␣

Slew Rate SR R
Full-Power Bandwidth BW

p

= 1 kΩ, 1 nF 3 V/µs

L

1% Distortion kHz

Gain Bandwidth Product GBP 5 MHz

Phase Margin φm 69 Degrees

NOISE PERFORMANCE␣

Voltage Noise e
Voltage Noise Density e

Current Noise Density i

Specifications subject to change without notice.

p-p 0.1 Hz to 10 Hz 2 µV p-p

n

n

n

f = 1 kHz 22 nV/√Hz

1

pA/√Hz

–2–

REV. F

OP179/OP279

WARNING!

ESD SENSITIVE DEVICE

ABSOLUTE MAXIMUM RATINGS

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

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+16 V

Differential Input Voltage

1

. . . . . . . . . . . . . . . . . . . . . . . . . ±1 V

Output Short-Circuit Duration to GND . . . . . . . . . . Indefinite

Storage Temperature Range

P, S, RT, RU Package . . . . . . . . . . . . . . . . –65°C to +150°C

Operating Temperature Range

OP179G/OP279G . . . . . . . . . . . . . . . . . . . . –40°C to +85°C

Junction Temperature Range

P, S, RT, RU Package . . . . . . . . . . . . . . . . –65°C to +150°C

Lead Temperature Range (Soldering, 60 sec) . . . . . . . +300°C

Package Types ␪

5-Lead SOT-23 (RT) 256 81 °C/W
8-Lead Plastic DIP (P) 103 43 °C/W
8-Lead SOIC (S) 158 43 °C/W
8-Lead TSSOP (RU) 240 43 °C/W

NOTES

1

The 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.

2

θJA is specified for the worst case conditions, i.e., θ

for P-DIP, packages; θ
packages.

is specified for device soldered in circuit board for SOIC

JA

ORDERING GUIDE

Package Temperature Range␣ Package Description Package Option Brand Code

OP179GRT –40°C to +85°C 5-Lead SOT-23 RT-5 A2G
OP279GP –40°C to +85°C 8-Lead Plastic DIP N-8
OP279GS –40°C to +85°C 8-Lead SOIC SO-8
OP279GRU –40°C to +85°C 8-Lead TSSOP RU-8

2

JA

␪

JC

is specified for device in socket

JA

Unit

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.

REV. F

–3–

OP179/OP279

400

–400

5

–200

–300

10

0

–100

100

200

300

432

+858C

+258C

COMMON-MODE VOLTAGE – Volts

INPUT BIAS CURRENT – nA

VS = +5V

–408C

COMMON-MODE VOLTAGE – Volts

7

0

5

3

1

1

2

0

6

4

5

432

BANDWIDTH – MHz

VS = +5V
TA = +258C

PHASE

GAIN

40

–40

100 1k 10M1M100k10k

60

80

100

–20

0

20

90

–90

135

180

225

–45

0

45

FREQUENCY – Hz

OPEN-LOOP GAIN – dB

PHASE – Degrees

120 270

VS 62.5V
TA –408C
RL = 2kV

Typical Performance Graphs

160

VS = +5V
T

= +258C

A

140

620 x OP AMPS,
PDIP

120

100

80

UNITS

60

40

20

0

–2.5

INPUT OFFSET – mV

Figure 1. Input Offset Distribution

2.5

1.50.5–0.5–1.5

90

80

–I

SC

70

+I

60

VS = +5V

50

V

SHORT CIRCUIT CURRENT – mA

CM

40

–25

–50

SC

= +2.5V

TEMPERATURE – 8C

7550250

Figure 2. Short Circuit Current vs.
Temperature

100

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

3.0
VS = +5V

2.5

T

= +258C

A

2.0

1.5

1.0

OFFSET VOLTAGE – mV

0.5

0

1

0

COMMON-MODE VOLTAGE – Volts

Figure 4. Offset Voltage vs.
Common-Mode Voltage

1000

RL= 2kV

800

VS = 15V

600

0.3

V

4.7V

OUT

400

OPEN-LOOP GAIN – V/mV

200

0

–25

–50

Figure 7. Open-Loop Gain vs.
Temperature

RL= 1kV

TEMPERATURE – 8C

432

7550250

100

100

–I

90

80

70

60

SHORT CIRCUIT CURRENT – mA

VS = 65V

50

–25

5

–50

Figure 5. Short Circuit Current vs.
Temperature

5

4

3

2

SLEW RATE – V/ms

1

0
–50

VS = +5V
R

= 1kV

L

= +1nF

C

L

–25

Figure 8. Slew Rate vs.
Temperature

SC

+I

SC

TEMPERATURE – 8C

+EDGE

–EDGE

TEMPERATURE – 8C

–4–

100

7550250

Figure 6. Bandwidth vs.
Common-Mode Voltage

100

7550250

Figure 9. Open-Loop Gain and
Phase vs. Frequency

REV. F

OP179/OP279

PHASE

GAIN

120

40

–40

100 1k 10M1M100k10k

60

80

100

–20

0

20

270

90

–90

135

180

225

–45

0

45

FREQUENCY – Hz

OPEN-LOOP GAIN – dB

PHASE – Degrees

VS 62.5V
TA –408C
RL = 2kV
CL = 500pF

80

0

10k

20

10

0

40

30

50

60

70

8k6k4k2k

LOAD CAPACITANCE – pF

OVERSHOOT – %

TA = +258C
A

VCL

= +1

R

L

1kV
VS 62.5V
VIN = +100mV p-p

POSITIVE EDGE AND
NEGATIVE EDGE

6.5

6.0

5.5

5.0

SUPPLY CURRENT – mA

4.5

4.0
–50

VS = 66V

VS = 65V

VS = +5V
V

CM

–25

TEMPERATURE – 8C

= +2.5V

100

7550250

Figure 10. Supply Current vs.
Temperature

120

VS 62.5V

100

80

60

40

20

POWER SUPPLY REJECTION – dB

0

10 100 10M1M100k10k1k

+PSRR

FREQUENCY – Hz

TA = +258C

–PSRR

Figure 13. Power Supply Rejection vs.
Frequency

5

+EDGE

4

–EDGE

3

2

SLEW RATE – V/ms

1

0

–50

VS = 65V
RL = 1kV
C

= +1nF

L

–25

TEMPERATURE – 8C

100

7550250

Figure 11. Slew Rate vs. Temperature

6

TA = +258C

= 62.5V

V

5

4

3

2

1

MAXIMUM OUTPUT SWING – Volts

0

10k

FREQUENCY – Hz

S

A

VCL

R

L

1M100k1k

= +1

1kV

10M

Figure 14. Maximum Output
Swing vs. Frequency

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

180

TA = +258C

160

V

= 62.5V OR 65V

S

140
120

100

80

IMPEDANCE – V

60
40
20

0

10 100 10M1M100k10k1k

A

= 10 OR 100

VCL

FREQUENCY – Hz

Figure 15. Closed-Loop Output
Impedance vs. Frequency

A

= 1

VCL

Figure 16. Maximum Output Swing
vs. Frequency

REV. F

12

10

8

6

4

2

MAXIMUM OUTPUT SWING – Volts

0

10k 10M1M100k1k

FREQUENCY – Hz

TA = +258C

= 65V

V

S

= +1

A

VCL

1kV

R

L

50

A

= +100

VCL

40

30

A

= +10

VCL

20

10

A

= +1

VCL

0

–10

CLOSED-LOOP GAIN – dB

–20
–30

1k 10k 100M10M1M100k

FREQUENCY – Hz

VS 62.5V
TA = +258C
RL 1kV

Figure 17. Closed-Loop Gain vs.
Frequency

–5–

Figure 18. Small Signal Overshoot
vs. Load Capacitance