Analog Devices OP179 279 g Datasheet

Rail-to-Rail High Output

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)

OUT A

+IN A

ⴚIN A

+IN A

OP179

1

2

V+

3

8-Lead SOIC

(S Suffix)

OP179

NC

1

2

3

Vⴚ

4

NC = NO CONNECT

5

4

8

7

6

5

V–

ⴚIN A

NC

V+

OUT A

NC

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.

8-Lead SOIC and TSSOP

SO-8 (S) and RU-8

OUT A

ⴚIN A

+IN A

Vⴚ

1

2

OP279

3

4

8

7

6

5

V+

OUT B

ⴚIN B

+IN B

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.

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.

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, –40ⴗC ≤ TA ≤ +85ⴗC unless otherwise noted.)

Parameter Symbol Conditions Min Typ Max Unit

INPUT CHARACTERISTICS

Offset Voltage

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

V

= 2.5 V ±5mV

OUT

V

= 2.5 V ±4mV

OUT

V

= 2.5 V, TA = 25°C ±300 nA

OUT

= 2.5 V ±700 nA

V

OUT

V

= 2.5 V, TA = 25°C ±50 nA

OUT

V

= 2.5 V ±100 nA

OUT

05V

= 0 V to 5 V 56 66 dB

CM

RL = 1 kΩ, 0.3 V ≤ V

≤ 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, TA = 25°C75mV
I

= 10 mA Sink 100 mV

L

TA = 25°C ±40 mA
f = 1 MHz, AV = 1 22 Ω

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

= 1 kΩ, 1 nF 3 V/µs

L

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 e

n

f = 1 kHz 22 nV/√Hz

ELECTRICAL SPECIFICATIONS

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

Parameter Symbol Conditions Min Typ Max Unit

INPUT CHARACTERISTICS

Offset Voltage

OP179 V
OP279 V

Input Bias Current I

OS

OS

B

V

= 0 ±5mV

OUT

V

= 0 ±4mV

OUT

TA = 25°C ±300 nA

±700 nA

Input Offset Current I

OS

TA = 25°C ±50 nA

±100 nA

Input Voltage Range V

CM

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

VO

= –5 V to +5 V 56 66 dB

CM

RL = 1 kΩ, –4.7 V ≤ V

≤ 4.7 V 20 V/mV

OUT

–5 +5 V

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
TA = 25°C ±50 mA
f = 1 MHz, AV = +1 22 Ω

POWER SUPPLY

Supply Current/Amplifier I

SY

VS = ±6 V, V

= 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. G

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

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

Operating Temperature Range

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

Junction Temperature Range

Package Types ␪

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

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., θJA is specified for device soldered

in circuit board for SOIC packages.

2

JA

␪

JC

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

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

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

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. G

–3–

OP179/OP279

–

Typical Performance Characteristics

160

VS ⴝ 5V

ⴝ 25ⴗC

T

140

A

620 ⴛ OP AMPS

120

100

80

UNITS

60

40

20

0

–2.5

INPUT OFFSET – mV

TPC 1. Input Offset Distribution

3.0

VS ⴝ 5V

2.5

ⴝ 25ⴗC

T

A

2.0

1.5

1.0

OFFSET VOLTAGE – mV

0.5

0

1

0

COMMON-MODE VOLTAGE – Volts

90

80

–I

SC

70

+I

60

2.5

1.50.5–0.5–1.5

SHORT-CIRCUIT CURRENT – mA

VS ⴝ 5V

50

V

CM

40

–25

–50

SC

ⴝ 2.5V

TEMPERATURE – ⴗC

100

7550250

TPC 2. Short-Circuit Current vs.
Temperature

100

–I

90

80

70

60

SHORT-CIRCUIT CURRENT – mA

VS ⴝ ⴞ5V

50

–25

5

432

–50

SC

+I

SC

TEMPERATURE – ⴗC

100

7550250

400

VS ⴝ 5V

300

200

100

0

–100

–200

INPUT BIAS CURRENT – nA

–300

–400

10

COMMON-MODE VOLTAGE – Volts

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

7

VS ⴝ 5V

6

TA ⴝ 25ⴗC

5

4

3

BANDWIDTH – MHz

2

1

0

1

0

COMMON-MODE VOLTAGE – Volts

–40ⴗC

+25ⴗC

+85ⴗC

432

5

432

5

TPC 4. Offset Voltage vs.
Common-Mode Voltage

1000

RL ⴝ 2k⍀

800

VS ⴝ 15V

600

0.3

V

4.7V

OUT

400

OPEN-LOOP GAIN – V/mV

200

0

–25

–50

RL ⴝ 1k⍀

TEMPERATURE – ⴗC

TPC 7. Open-Loop Gain vs.
Temperature

TPC 5. Short-Circuit Current vs.
Temperature

5

4

3

2

SLEW RATE – VⲐ␮s

100

7550250

1

0
–50

VS ⴝ 5V

ⴝ 1k⍀

R

L

ⴝ +1nF

C

L

–25

+EDGE

–EDGE

TEMPERATURE – ⴗC

100

7550250

TPC 8. Slew Rate vs.
Temperature

TPC 6. Bandwidth vs.
Common-Mode Voltage

120 270

100

80

60

40

20

0

OPEN-LOOP GAIN – dB

–20

–40

100 1k 10M1M100k10k

GAIN

PHASE

FREQUENCY – Hz

VS ⴞ2.5V

–40ⴗC

T

A

ⴝ 2k⍀

R

L

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

225

180

135

90

45

0

–45

–90

PHASE – Degrees

–4–

REV. G

OP179/OP279

180

160

140

120

100

80

60

40

20

0

10 100 10M1M100k10k1k

TA ⴝ 25ⴗC
V

S

ⴝ ⴞ2.5V OR ⴞ5V

FREQUENCY – Hz

IMPEDANCE – ⍀

A

VCL

ⴝ 1

A

VCL

ⴝ 10 OR 100

6.5

SUPPLY CURRENT – mA

6.0

5.5

5.0

4.5

4.0
–50

VS ⴝ ⴞ6V

VS ⴝ ⴞ5V

VS ⴝ 5V
V

CM

–25

TEMPERATURE – ⴗC

ⴝ 2.5V

100

7550250

TPC 10. Supply Current vs.
Temperature

120

VS ⴞ2.5V

ⴝ 25ⴗC

T

100

80

60

40

20

POWER SUPPLY REJECTION – dB

0

10 100 10M1M100k10k1k

+PSRR

FREQUENCY – Hz

A

–PSRR

TPC 13. Power Supply Rejection vs.
Frequency

5

+EDGE

4

–EDGE

3

2

SLEW RATE – V/␮s

1

0

–50

VS ⴝ ⴞ5V

ⴝ 1k⍀

R

L

C

ⴝ +1nF

L

–25

TEMPERATURE – ⴗC

100

7550250

TPC 11. Slew Rate vs. Temperature

6

TA ⴝ 25ⴗC

ⴝ ⴞ2.5V

V

5

4

3

2

1

MAXIMUM OUTPUT SWING – Volts

0

10k

FREQUENCY – Hz

S

A

VCL

R

L

ⴝ +1

1k⍀

1M100k1k

10M

TPC 14. Maximum Output
Swing vs. Frequency

120

100

80

60

40

20

OPEN-LOOP GAIN – dB

0

–20

–40

100 1k 10M1M100k10k

GAIN

PHASE

FREQUENCY – Hz

VS ⴞ2.5V
T

A

R

L

C

L

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

TPC 15. Closed-Loop Output
Impedance vs. Frequency

– 40ⴗC
ⴝ 2k⍀
ⴝ 500pF

270

225

180

135

90

45

0

–45

–90

PHASE – Degrees

12

10

8

6

4

2

MAXIMUM OUTPUT SWING – Volts

0

10k 10M1M100k1k

FREQUENCY – Hz

TA ⴝ 25ⴗC
V

S

A

VCL

1k⍀

R

L

TPC 16. Maximum Output Swing vs.
Frequency

REV. G

ⴝ ⴞ5V

ⴝ +1

50

A

ⴝ +100

VCL

40

30

A

ⴝ +10

VCL

20

10

A

ⴝ +1

VCL

0

–10

CLOSED-LOOP GAIN – dB

–20

–30

1k 10k 100M10M1M100k

FREQUENCY – Hz

TPC 17. Closed-Loop Gain vs.
Frequency

–5–

VS ⴞ2.5V

ⴝ 25ⴗC

T

A

⍀

1k

R

L

80

TA ⴝ 25ⴗC

ⴝ +1

A

70

VCL

1k⍀

R

L

ⴞ2.5V

V

60

S

ⴝ 100mV p-p

V

IN

50

40

30

OVERSHOOT – %

20

10

0

0

POSITIVE EDGE AND
NEGATIVE EDGE

LOAD CAPACITANCE – pF

10k

8k6k4k2k

TPC 18. Small Signal Overshoot vs.
Load Capacitance