Datasheet OPA2677N, OPA2677U, OPA2677U-2K5, OPA2677H Datasheet (Burr Brown)

Dual, Wideband, High Output Current

OPERATIONAL AMPLIFIER

DESCRIPTION

The OPA2677 provides the high output current and low distortion
required in emerging ADSL and HDSL2 driver applications.
Operating on a single +12V supply, the OPA2677 consumes a
low 9mA/chan quiescent current to deliver a very high 500mA
peak output current. Guaranteed output current supports even the
most demanding ADSL CPE requirements with > 380mA mini­mum output current with low harmonic distortion. Differential
driver applications will deliver < –85dBc distortion at the peak
upstream power levels of full rate ADSL. The high 200MHz
bandwidth will also support the most demanding VDSL line
driver requirements.

OPA2677

®

FEATURES

●

WIDEBAND +12V OPERATION: 200MHz (G = +4)

● UNITY GAIN STABLE: 220MHz (G = 1)

● HIGH OUTPUT CURRENT: 500mA

● OUTPUT VOLTAGE SWING: ±5V

● HIGH SLEW RATE: 1800V/µs

● LOW SUPPLY CURRENT: 18mA

● FLEXIBLE POWER CONTROL

APPLICATIONS

● xDSL LINE DRIVER

● CABLE MODEM DRIVER

● MATCHED I/Q CHANNEL AMPLIFIER

● BROADBAND VIDEO LINE DRIVER

● ARB LINE DRIVER

● PERFORMANCE UPGRADE TO AD8017

Power control features are included in the SO-14 package version
to allow system power to be minimized. Two logic control lines
allow four quiescent power settings. These include full power,
power cutback for short loops, idle state for no signal transmission
but line match maintenance, and shutdown for power off with a
high impedance output.

Specified on ±6V supplies (to support +12V operation), the
OPA2677 will also support a single +5V or dual ±5V supply.
Video applications will benefit from its very high output
current to drive up to 10 parallel video loads (15Ω) with < 0.1%/

0.1° dG/dØ non-linearity.

TM

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone]

Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]

OPA2677 RELATED PRODUCTS

SINGLES DUALS TRIPLES NOTES

OPA681 OPA2681 OPA3681 Single +12V Capable

— OPA2607 — ±12V Capable

©

2000 Burr-Brown Corporation PDS-1593A Printed in U.S.A. April, 2000

Single Supply ADSL Upstream Driver

82.5Ω

2kΩ

2kΩ

1µF

17.4Ω

100Ω

2Vp-p

AFE

Output

324Ω

20Ω

324Ω

1/2

OPA2677

1/2

OPA2677

+12V

1:1.7

15Vp-p Twisted Pair17.7Vp-p

20Ω

17.4Ω

+6.0V

OPA2677

OPA2677

For most current data sheet and other product

information, visit www.burr-brown.com

2

®

OPA2677

SPECIFICATIONS: VS = ±6V

At TA = +25°C, G = +4, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 1 for AC performance only

OPA2677U, H, N

TYP GUARANTEED

0°C to –40°C to

MIN/

TEST

PARAMETER CONDITIONS +25°C +25°C

(2)

70°C

(3)

+85°C

(3)

UNITS MAX

LEVEL

(1)

AC PERFORMANCE (Figure 1)

Small-Signal Bandwidth (VO = 0.5Vp-p) G = +1, RF = 511Ω 220 MHz typ C

G = +2, R

F

= 475Ω 200 MHz typ C

G = +4, R

F

= 402Ω 200 MHz typ C

G = +8, R

F

= 250Ω 250 MHz typ C

Bandwidth for 0.1dB Gain Flatness G = +4, V

O

= 0.5Vp-p 80 MHz typ C

Large-Signal Bandwidth G = +4, V

O

= 5Vp-p 200 MHz typ C
Slew Rate G = +4, 5V Step 1800 V/µs typ C
Rise/Fall Time G = +4, V

O

= 2V Step 2 ns typ C

Spurious Free Dynamic Range V

O

= 2Vp-p, 5MHz, 100Ω 74 dB typ C

V

O

= 2Vp-p, 100kHz, 100Ω 96 dB typ C
Input Voltage Noise 2.0 nV/√Hz typ C
Non-Inverting Input Current Noise 14 pA/√Hz typ C
Inverting Input Current Noise 21 pA/√Hz typ C
Differential Gain NTSC, G = +2, R

L

= 150Ω 0.03 % typ C

NTSC, G = +2, R

L

= 37.5Ω 0.05 % typ C

Differential Phase NTSC, G = +2, R

L

= 150Ω 0.01 degrees typ C

NTSC, G = +2, R

L

= 37.5Ω 0.04 degrees typ C

Channel-to-Channel Crosstalk f = 5MHz, Input Referred –80 dB typ C

DC PERFORMANCE

(4)

Open-Loop Transimpedance Gain

VO = 0V, RL = 100Ω 135 95 90 85 kΩ min A

Input Offset Voltage V

CM

= 0V ±1.0 ±5.5 ±7 ±7.5 mV max A

Average Offset Voltage Drift V

CM

= 0V 35 40 µV/°C max B

Non-Inverting Input Bias Current V

CM

= 0V ±10 ±30 ±45 ±55 µA max A

Average Non-Inverting Input Bias Current Drift V

CM

= 0V 250 350 nA/°C max B
Inverting Input Bias Current VCM = 0V ±10 ±30 ±45 ±55 µA max A
Average Inverting Input Bias Current Drift V

CM

= 0V 250 350 nA°/C max B

INPUT

(4)

Common-Mode Input Range (CMIR)

(5)

±4.5 ±4.2 ±4.1 ±4.0 V min A

Common-Mode Rejection Ratio(CMRR) V

CM

= 0V, Input Referred 55 52 51 50 dB min A
Non-Inverting Input Impedance 250 || 2 kΩ || pF typ C
Minimum Inverting Input Resistance

Open-Loop 22 14 Ω min B

Maximum Inverting Input Resistance

Open-Loop 22 30 Ω max B

OUTPUT

(4)

Voltage Output Swing No Load ±5.1 ±4.9 ±4.8 ±4.7 V min A

R

L

= 100Ω±5.0 ±4.8 ±4.7 ±4.5 V min A

R

L

= 25Ω±4.8 V typ C
Current Output, Sourcing VO = 0 500 380 340 290 mA min A
Current Output, Sinking V

O

= 0 500 380 340 290 mA min A

Closed-Loop Output Impedance G = +4, f = 100kHz 0.003 Ω typ C

Power Control

(SO-14 only)

Maximum Logic 0 A0, A1 1.8 1.0 V max A
Minimum Logic 1 A0, A1 2.3 2.6 V min A
Logic Input Current A0 = A1 = 0 50 100 µA max A
Supply Current at Full Power A0 = 1, A1 = 1 18 mA typ C
Supply Current at Power Cutback A0 = 0, A1 = 1 13.5 mA typ C
Supply Current at Idle Power A0 = 1, A1 = 0 3.8 mA typ C
Supply Current at Shutdown A0 = 0, A1 = 0 0.8 mA typ C
Output Impedance in Idle Power G = +4, f = 100kHz 0.1 Ω typ C
Output Impedance in Shutdown 100 || 4 kΩ || pF typ C
Supply Current Step Time 10% to 90% Change 200 ns typ C
Output Switching Glitch Inputs at GND ±20 mV typ C
Shutdown Isolation G = +4, 1MHz, A0 = 0, A1 = 0 85 dB typ C

POWER SUPPLY

Specified Operating Voltage ±6 V typ C
Maximum Operating Voltage ±6.3 ±6.3 ±6.3 V max A
Maximum Quiescent Current V

S

= ±6V, Full Power 18 18.5 19 19.5 mA max A

Minimum Quiescent Current V

S

= ±6V, Full Power 18 17.5 16.6 16.3 mA min A

Power Supply Rejection Ratio (PSRR) f = 100kHz, Input Referred 56 52 50 49 dB min A

TEMPERATURE RANGE

Specification: U, N

–40 to +85

°C

Thermal Resistance,

θ

JA

U SO-8 Junction-to-Ambient 125 °C/W
H PSO-8 55 °C/W
N SO-14 100 °C/W

NOTES: (1) Test Levels: (A) 100% tested at 25°C. Over temperature limits by characterization and simulation. (B) Limits set by characterization and simulation.
(C) Typical value only for information. (2) Junction temperature = ambient for 25°C guaranteed specifications. (3) Junction temperature = ambient at low temperature
limit: junction temperature = ambient +23°C at high temperature limit for over temperature guaranteed specifications. (4) Current is considered positive-out-of node.
V

CM

is the input common-mode voltage. (5) Tested < 3dB below minimum CMRR limit at ± CMIR limits.

3

®

OPA2677

SPECIFICATIONS: VS = +5V

At TA = +25°C, G = +2, RF = 453Ω, and RL = 100Ω, unless otherwise noted. See Figure 2 for AC performance only

OPA2677U, H, N

TYP GUARANTEED

0°C to –40°C to

MIN/

TEST

PARAMETER CONDITIONS +25°C +25°C

(2)

70°C

(3)

+85°C

(3)

UNITS MAX

LEVEL

(1)

AC PERFORMANCE (Figure 2)

Small-Signal Bandwidth (V

O

= 0.5Vp-p) G = +1, RF = 536Ω 160 MHz typ C

G = +2, R

F

= 511Ω 150 MHz typ C
G = +4, RF = 453Ω 160 MHz typ C
G = +8, R

F

= 332Ω 160 MHz typ C

Bandwidth for 0.1dB Gain Flatness G = +4, V

O

= 0.5Vp-p 70 MHz typ C

Large-Signal Bandwidth G = +4, V

O

= 2Vp-p 100 MHz typ C

Slew Rate G = +4, 2V Step 1100 V/µs typ C
Rise/Fall Time G = +4, V

O

= 2V Step 2 ns typ C

Spurious Free Dynamic Range VO = 2Vp-p, 5MHz, 100Ω 67 dB typ C

V

O

= 2Vp-p, 100kHz, 100Ω 87 dB typ C
Input Voltage Noise 2.0 nV/√Hz typ C
Non-Inverting Input Current Noise 14 pA/√Hz typ C
Inverting Input Current Noise 21 pA/√Hz typ C
Channel-to-Channel Crosstalk f = 5MHz, Input Referred –80 dB typ C

DC PERFORMANCE

(4)

Open-Loop Transimpedance Gain

VO = 0V, RL = 100Ω 125 90 85 80 kΩ min A

Input Offset Voltage V

CM

= 0V ±0.8 ±4.0 ±5.5 ±6.0 mV max A

Average Offset Voltage Drift V

CM

= 0V 35 40 µV/°C max B

Non-Inverting Input Bias Current V

CM

= 0V ±10 ±30 ±45 ±55 µA max A

Average Non-Inverting Input Bias Current Drift V

CM

= 0V 250 350 nA/°C max B
Inverting Input Bias Current VCM = 0V ±10 ±30 ±45 ±55 µA max A
Average Inverting Input Bias Current Drift V

CM

= 0V 250 350 nA°/C max B

INPUT

(4)

Most Positive Input Voltage 3.7 3.4 3.3 3.2 V min A
Least Positive Input Voltage 1.3 1.6 1.7 1.8 V max A
Common-Mode Rejection Ratio(CMRR) V

CM

= 2.5V, Input Referred 52 50 49 48 dB min A
Non-Inverting Input Impedance 250 || 2 kΩ || pF typ C
Minimum Inverting Input Resistance

Open-Loop 29 20 Ω min B

Maximum Inverting Input Resistance

Open-Loop 29 37 Ω max B

OUTPUT

(4)

Most Positive Output Voltage No Load 4.2 4.0 3.9 3.7 V min A

R

L

= 100Ω 4.0 3.9 3.8 3.6 V min A

Least Positive Output Voltage No Load 0.8 1.0 1.1 1.3 V max A

R

L

= 100Ω 1.0 1.1 1.2 1.5 V max A

Current Output, Sourcing V

O

= 2.5V 300 200 160 120 mA min A

Current Output, Sinking V

O

= 2.5V 300 200 160 120 mA min A

Closed-Loop Output Impedance G = +4, f = 100kHz 0.02 Ω typ C

Power Control

(SO-14 only)

Maximum Logic 0 A0, A1 1.8 1.0 V max A
Minimum Logic 1 A0, A1 2.3 2.6 V min A
Logic Input Current A0 = A1 = 0 50 100 µA max A
Supply Current at Full Power A0 = 1, A1 = 1 13.5 mA typ C
Supply Current at Power Cutback A0 = 0, A1 = 1 11 mA typ C
Supply Current at Idle Power A0 = 1, A1 = 0 2 mA typ C
Supply Current at Shutdown A0 = 0, A1 = 0 0.8 mA typ C
Output Impedance in Idle Power G = +4, f = 100kHz 0.1 Ω typ C
Output Impedance in Shutdown 100 || 4 kΩ || pF typ C
Supply Current Step Time 10% to 90% Change 200 ns typ C
Output Switching Glitch Inputs at GND ±20 mV typ C
Shutdown Isolation G = +4, 1MHz, A0 = 0, A1 = 0 85 dB typ C

POWER SUPPLY

Specified Operating Voltage +5 V typ C
Maximum Operating Voltage +12.6 +12.6 +12.6 V max A
Maximum Quiescent Current V

S

= +5V, Full Power 13.5 14.5 15 15.5 mA max A

Minimum Quiescent Current V

S

= +5V, Full Power 13.5 12.5 12 11.5 mA min A

Power Supply Rejection Ratio (PSRR) f = 100kHz, Input Referred 52 dB typ C

TEMPERATURE RANGE

Specification: U, N

–40 to +85

°C

Thermal Resistance,

θ

JA

U SO-8 Junction-to-Ambient 125 °C/W
H PSO-8 55 °C/W
N SO-14 100 °C/W

NOTES: (1) Test Levels: (A) 100% tested at 25°C. Over temperature limits by characterization and simulation. (B) Limits set by characterization and simulation.
(C) Typical value only for information. (2) Junction temperature = ambient for 25°C guaranteed specifications. (3) Junction temperature = ambient at low temperature
limit: junction temperature = ambient +23°C at high temperature limit for over temperature guaranteed specifications. (4) Current is considered positive-out-of node.
V

CM

is the input common-mode voltage. (5) Tested < 3dB below minimum specified CMRR at ± CMIR limits.

4

®

OPA2677

ABSOLUTE MAXIMUM RATINGS

Power Supply .............................................................................. ±6.5VDC

Internal Power Dissipation

(1)

............................ See Thermal Information

Differential Input Voltage ..................................................................±1.2V

Input Voltage Range ............................................................................ ±V

S

Storage Temperature Range: U, N, H ........................... –40°C to +125°C

Lead Temperature (soldering, 10s) .............................................. +300°C

Junction Temperature (T

J

) ........................................................... +175°C

NOTE:: (1) Packages must be derated based on specified

θ

JA

. Maximum T

J

must be observed.

ELECTROSTATIC
DISCHARGE SENSITIVITY

Electrostatic discharge can cause damage ranging from perfor­mance degradation to complete device failure. Burr-Brown
Corporation recommends that all integrated circuits be handled
and stored using appropriate ESD protection methods.

ESD damage can range from subtle performance degradation to
complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric
changes could cause the device not to meet published specifica­tions.

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.

PIN CONFIGURATIONS

Top View SO-8, PSO-8

SO-14

PACKAGE SPECIFIED
DRAWING TEMPERATURE PACKAGE ORDERING TRANSPORT

PRODUCT PACKAGE NUMBER RANGE MARKING NUMBER

(1)

MEDIA

OPA2677U SO-8 Surface Mount 182 –40°C to +85°C OPA2677U OPA2677U Rails

"""""OPA2677U/2K5 Tape and Reel

OPA2677H PSO-8 Surface Mount 182-1 –40°C to +85°C OPA2677H — Rails

"""""— Tape and Reel

OPA2677N SO-14 Surface Mount 235 –40°C to –85°C OPA2677N — Rails

"""""— Tape and Reel

NOTE: (1) Models with a slash (/) are available only as Tape and Reel in the quantity indicated after the slash (e.g. /2K5 indicates 2500 devices per reel). Ordering 2500
pieces of the OPA2677U/2K5 will get a single 2500-piece Tape and Reel.

PACKAGE/ORDERING INFORMATION

1
2
3
4

8
7
6
5

+V

S

Out B
–In B
+In B

OPA2677U, H

Out A

–In A
+In A

–V

S

1

2

3

4

5

6

7

14

13

12

11

10

9

8

–In A

+In A

A0

–V

S

A1

+In B

–In B

Out A

NC

NC

+V

S

NC

NC

Out B

Power

Control

OPA2677N

5

®

OPA2677

TYPICAL PERFORMANCE CURVES: VS = ±6V

At TA = +25°C, G = +4, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 1 for AC performance only

NON-INVERTING SMALL-SIGNAL

FREQUENCY RESPONSE

Frequency (MHz)

0 100 200 300 400 500

6
3

0
–3
–6
–9

–12
–15
–18

Normalized Gain (dB)

VO = 0.5Vp-p

See Figure 1.

G = +8

R

F

= 250Ω

G = +2

R

F

= 475Ω

G = +4

R

F

= 402Ω

G = +1

R

F

= 511Ω

INVERTING SMALL-SIGNAL

FREQUENCY RESPONSE

Frequency (MHz)

0 100 200 300 400 500

6
3

0
–3
–6
–9

–12
–15
–18

Normalized Gain (dB)

VO = 0.5Vp-p

G = –8, RF = 280Ω

G = –2, RF = 422Ω

G = –8, RF = 280Ω

G = –4, RF = 383Ω

NON-INVERTING LARGE-SIGNAL

FREQUENCY RESPONSE

Frequency (MHz)

0 100 200 300 400 500

18
15
12

9
6
3

0
–3
–6
–9

–12
–15

Gain (dB)

G = +4, See Figure 1

VO = 10Vp-p

VO = 8Vp-p

VO = 2Vp-p

VO ≤ 1Vp-p

INVERTING LARGE-SIGNAL

FREQUENCY RESPONSE

Frequency (MHz)

0 100 200 300 400 500

18
15
12

9
6
3

0
–3
–6
–9

–12
–15

Gain (dB)

G = –4

R

F

= 383Ω

VO = 8Vp-p

VO = 10Vp-p

VO = 5Vp-p

VO ≤ 1Vp-p

NON-INVERTING PULSE RESPONSE

Time (5ns/div)

Output Voltage (1V/div)

Output Voltage (100mV/div)

5Vp-p

G = +4

200mVp-p

Left Scale

Large Signal

Right Scale

Small Signal

INVERTING PULSE RESPONSE

Time (5ns/div)

Output Voltage (1V/div)

Output Voltage (100mV/div)

5Vp-p

Left Scale

Large Signal

Right Scale

200mVp-p

Small Signal

6

®

OPA2677

TYPICAL PERFORMANCE CURVES: VS = ±6V (Cont.)

At TA = +25°C, G = +4, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 1 for AC performance only

HARMONIC DISTORTION vs FREQUENCY

Frequency (MHz)

0.1 1 2010

–60
–65
–70
–75
–80
–85
–90
–95

–100

Harmonic Distortion (dBc)

VO = 2Vp-p

R

L

= 100Ω

Single Channel. See text
for differential performance.

2nd-Harmonic

3rd-Harmonic

HARMONIC DISTORTION vs OUTPUT VOLTAGE

Output Voltage (Vp-p)

0.1 1 10

–60
–65
–70
–75
–80
–85
–90
–95

–100

Harmonic Distortion (dBc)

F = 5MHz

R

L

= 100Ω

2nd-Harmonic

3rd-Harmonic

Single Channel. See text for differential performance.

HARMONIC DISTORTION vs NON-INVERTING GAIN

Gain Magnitude (V/V)

1

–60
–65
–70
–75
–80
–85
–90
–95

–100

10

Harmonic Distortion (dBc)

VO = 2Vp-p

f = 5MHz

R

L

= 100Ω

2nd-Harmonic

3rd-Harmonic

Single Channel (see text for differential performance).

HARMONIC DISTORTION vs INVERTING GAIN

Gain Magnitude (–V/V)

1

–60
–65
–70
–75
–80
–85
–90
–95

–100

10

Harmonic Distortion (dBc)

VO = 2Vp-p

f = 5MHz

R

L

= 100Ω

2nd-Harmonic

3rd-Harmonic

Single Channel (see text for differential performance).

HARMONIC DISTORTION vs LOAD RESISTANCE

Load Resistance (Ω)

10 100 1000

–60
–65
–70
–75
–80
–85
–90
–95

–100

Harmonic Distortion (dBc)

Single Channel. See text
for differential performance.

VO = 2Vp-p

f = 5MHz

2nd-Harmonic

3rd-Harmonic

2-TONE, 3rd-ORDER

INTERMODULATION SPURIOUS

Single-Tone Load Power (dBm)

–10 0 5–5 10

–60
–65
–70
–75
–80
–85
–90
–95

–100

3rd-Order Spurious Level (dBc)

Figure 1

20MHz

5MHz

1MHz

Single Channel. See text
for differential performance.

10MHz

7

®

OPA2677

TYPICAL PERFORMANCE CURVES: VS = ±6V (Cont.)

At TA = +25°C, G = +4, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 1 for AC performance only

MAXIMUM OUTPUT SWING

vs LOAD RESISTANCE

Load Resistance (Ω)

10

6
5
4
3
2
1

0
–1
–2
–3
–4
–5
–6

100 1000

Output Voltage (V)

Figure 1

OUTPUT VOLTAGE AND CURRENT LIMITATIONS

I

O

(mA)

–600

6
5
4
3
2
1

0
–1
–2
–3
–4
–5
–6

0 200 400–200–400 600

V

O

(V)

RL = 10Ω

RL = 25Ω

RL = 50Ω

RL = 100Ω

1W Internal Power

Single Ch.

1W Internal Power

Single Ch.

OUTPUT VOLTAGE AND CURRENT LIMITATIONS

Frequency (Hz)

10

2

100

10

1

10

5

10

6

10

4

10

3

10

7

Voltage Noise nV/√Hz

Current Noise pA/√Hz

Inverting Current Noise

20pA/√Hz

15pA/√Hz

2nV/√Hz

Voltage Noise

Non-Inverting Current Noise

CHANNEL-TO-CHANNEL CROSSTALK

Frequency (Hz)

10

6

10

7

10

8

–60
–65
–70
–75
–80
–85
–90
–95

–100

Crosstalk, Input Referred (dB)

RECOMMENDED RS vs CAPACITIVE LOAD

Capacitive Load (pF)

1 10 100 1000

90
80
70
60
50
40
30
20
10

0

R

S

(Ω)

FREQUENCY RESPONSE vs CAPACITIVE LOAD

Frequency (Hz)

1M

2

0

–2

–4

–6

–8

–10

10M 100M 1G

Normalized Gain to Capacitive

Load (dB)

CL = 10pF

CL = 22pF

CL = 100pF

CL = 47pF

1/2

OPA2677

402Ω

R

S

133Ω

1kΩC

L

1kΩ is optional.

8

®

OPA2677

TYPICAL PERFORMANCE CURVES: VS = ±6V (Cont.)

At TA = +25°C, G = +4, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 1 for AC performance only

CMRR AND PSRR vs FREQUENCY

Frequency (Hz)

10

3

70

60

50

40

30

20

10

0

10

4

10

5

10

6

10

7

10

8

Power Supply Rejection Ratio (dB)

Common-Mode Rejection Ratio (dB)

CMRR

–PSRR

+PSRR

OPEN-LOOP TRANSIMPEDANCE GAIN AND PHASE

Frequency (Hz)

10

4

10

5

10

6

10

7

10

8

10

9

120

100

80

60

40

20

0

Transimpedance Gain (20dBΩ/div)

0

–45

–90

–135

–180

–225

–270

Transimpedance Phase (45°/div)

CLOSED-LOOP OUTPUT IMPEDANCE

vs FREQUENCY

Frequency (Hz)

10

4

10

5

10

6

10

7

10

8

10

9

100

10

1

0.1

0.01

0.001

Output Impedance Magnitude (Ω)

COMPOSITE VIDEO dG/dφ

Number of 150Ω Loads

12345678910

0.14

0.12

0.10.

0.08

0.06

0.04

0.02

0.00

dG/dφ (%/°)

G = +2

R

F

= 475Ω

V

S

= ±5V

dφ, Negative Video

dφ, Positive Video

dG, Positive Video

dG, Negative Video

8
6
4
2

0
–2
–4
–6
–8

NON-INVERTING OVERDRIVE RECOVERY

Time (20ns/div)

Output Voltage (2V/div)

4
3
2
1
0
–1
–2
–3
–4

Input Voltage (1V/div)

G = +4

R

L

= 100Ω

Figure 1

Input

Output

8
6
4
2

0
–2
–4
–6
–8

INVERTING OVERDRIVE RECOVERY

Time (20ns/div)

Output Voltage (2V/div)

4
3
2
1
0
–1
–2
–3
–4

Input Voltage (1V/div)

Input

Output

G = –4

R

L

= 100Ω

9

®

OPA2677

TYPICAL PERFORMANCE CURVES: VS = ±6V (Cont.)

At TA = +25°C, G = +4, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 1 for AC performance only

TYPICAL DC ERROR DRIFT

vs TEMPERATURE

Ambient Temperature (°C)

–55

10

8
6
4
2

0
–2
–4
–6
–8

–10

–35 –15 5 25 45 65 85 105 125

Input Offset Voltage (mV)

Input Bias Current (µA)

Non-Inverting Bias Current

Input Offset Voltage

Inverting Bias Current

SUPPLY AND OUTPUT CURRENT

vs TEMPERATURE

Temperature (°C)

–55

600
550
500
450
400
350
300
250
200
150
100

–35 –15 5 25 45 65 85 105 125

Output Current (mA)

50

40

30

20

10

0

Output Current (mA)

Sourcing Output Current

Sinking Output Current

Supply Current, Full Power

CMIR AND OUTPUT VOLTAGE

vs SUPPLY VOLTAGE

Supply Voltage (±V)

2345

6

5

4

3

2

1

0

6

Voltage Range (±V)

± Output Voltage

No Load

+V Input Voltage

–V Input Voltage

10

®

OPA2677

NON-INVERTING SMALL-SIGNAL

FREQUENCY RESPONSE

Frequency (MHz)

0 50 100 150 200 250

6
3

0
–3
–6
–9

–12
–15
–18

Normalized Gain (dB)

See Figure 2.

G = +1

R

F

= 536Ω

G = +2

R

F

= 511Ω

G = +4

R

F

= 453Ω

G = +8

R

F

= 332Ω

INVERTING SMALL-SIGNAL

FREQUENCY RESPONSE

Frequency (MHz)

0 50 100 150

200

250

6
3

0
–3
–6
–9

–12
–15
–18

Normalized Gain (dB)

G = –8

R

F

= 332Ω

G = –4

R

F

= 453Ω

G = –2

R

F

= 511Ω

G = –1

R

F

= 536Ω

400
300
200
100

0
–100
–200
–300
–400

SMALL-SIGNAL PULSE RESPONSE

Time (5ns/div)

Output Voltage (100mV/div)

VO = 500mVp-p

See Figure 2.

TYPICAL PERFORMANCE CURVES: VS = +5V

At TA = +25°C, G = +4, RF = 453Ω, and RL = 100Ω to VS/2, unless otherwise noted. See Figure 2.

1.6

1.2

0.8

0.4
0

–0.4
–0.8
–1.2
–1.6

LARGE-SIGNAL PULSE RESPONSE

Time (5ns/div)

Output Voltage (400mV/div)

VO = 2Vp-p

See Figure 2.

RECOMMENDED RS vs CAPACITIVE LOAD

Capacitive Load (pF)

1 10 100 1000

50
45
40
35
30
25
20
15
10

5
0

R

S

(Ω)

FREQUENCY RESPONSE vs CAPACITIVE LOAD

Frequency (Hz)

1M

2

0

–2

–4

–6

–8

–10

10M 100M 1G

Normalized Gain to Capacitive

Load (dB)

CL = 10pF

CL = 22pF

CL = 47pF

453Ω

150Ω

5kΩ

5kΩ

1kΩ

1kΩ Load Optional.

1/2

OPA2677

V

I

+5V

0.1µF

V

O

R

S

C

L

0.1µF

CL = 100pF

11

®

OPA2677

TYPICAL PERFORMANCE CURVES: VS = +5V (Cont.)

At TA = +25°C, G = +4, RF = 453Ω, and RL = 100Ω, unless otherwise noted. See Figure 2 for AC performance only.

HARMONIC DISTORTION vs FREQUENCY

Frequency (MHz)

0.1 1 2010

–50
–55
–60
–65
–70
–75
–80
–85
–90

Harmonic Distortion (dBc)

VO = 2Vp-p

R

L

= 100Ω to VS/2

Single Channel. See Figure 2.

2nd-Harmonic

3rd-Harmonic

HARMONIC DISTORTION vs OUTPUT VOLTAGE

Output Voltage (Vp-p)

0.1 1 2

–50
–55
–60
–65
–70
–75
–80
–85
–90

Harmonic Distortion (dBc)

f = 5MHz

R

L

= 100Ω to VS/2

Single Channel.
See Figure 2.

3rd-Harmonic

2nd-Harmonic

HARMONIC DISTORTION vs NON-INVERTING GAIN

Gain Magnitude (V/V)

1

–50
–55
–60
–65
–70
–75
–80
–85
–90

10

Harmonic Distortion (dBc)

2nd-Harmonic

3rd-Harmonic

Single Channel

VO = 2Vp-p

f = 5MHz

R

L

= 100Ω to VS/2

HARMONIC DISTORTION vs INVERTING GAIN

Gain (V/V)

–1

–50
–55
–60
–65
–70
–75
–80
–85
–90

–10

Harmonic Distortion (dBc)

2nd-Harmonic

3rd-Harmonic

Single Channel

VO = 2Vp-p

f = 5MHz

R

L

= 100Ω to VS/2

HARMONIC DISTORTION vs LOAD RESISTANCE

Load Resistance (Ω)

10 100 1000

–50
–55
–60
–65
–70
–75
–80
–85
–90

Harmonic Distortion (dBc)

Single Channel.

VO = 2Vp-p

f = 5MHz

2nd-Harmonic

3rd-Harmonic

2-TONE, 3rd-ORDER SPURIOUS LEVEL

Single-Tone Load Power (dBm)

–10 0 5–5 10

–50
–55
–60
–65
–70
–75
–80
–85
–90

3rd-Order Spurious Level (dBc)

20MHz

5MHz

1MHz

Single Channel. See Figure 2.

10MHz

12

®

OPA2677

APPLICATIONS INFORMATION

WIDEBAND CURRENT FEEDBACK OPERATION

The OPA2677 gives the exceptional AC performance of a
wideband current feedback op amp with a highly linear, high
power output stage. Requiring only 9mA/ch. quiescent cur­rent, the OPA2677 will swing to within 1V of either supply
rail and deliver in excess of 380mA guaranteed at room
temperature. This low output headroom requirement, along
with supply voltage independent biasing, gives remarkable
single (+5V) supply operation. The OPA2677 will deliver
greater than 150MHz bandwidth driving a 2Vp-p output into
100Ω on a single +5V supply. Previous boosted output stage
amplifiers have typically suffered from very poor crossover
distortion as the output current goes through zero. The
OPA2677 achieves a comparable power gain with much
better linearity. The primary advantage of a current feedback
op amp over a voltage feedback op amp is that AC perfor­mance (bandwidth and distortion) is relatively independent
of signal gain.

Figure 1 shows the DC coupled, gain of +4, dual power
supply circuit configuration used as the basis of the ±6V
Specifications and Typical Performance Curves. For test
purposes, the input impedance is set to 50Ω with a resistor
to ground and the output impedance is set to 50Ω with a
series output resistor. Voltage swings reported in the speci­fications are taken directly at the input and output pins while
load powers (dBm) are defined at a matched 50Ω load. For
the circuit of Figure 1, the total effective load will be 100Ω
|| 537Ω = 84Ω.

Figure 2 shows the AC coupled, gain of +4, single supply
circuit configuration used as the basis of the +5V Specifica­tions and Typical Performance Curves. Though not a “rail­to-rail” design, the OPA2677 requires minimal input and
output voltage headroom compared to other very wideband
current feedback op amps. It will deliver a 3Vp-p output
swing on a single +5V supply with greater than 100MHz
bandwidth. The key requirement of broadband single supply
operation is to maintain input and output signal swings
within the usable voltage ranges at both the input and the
output. The circuit of Figure 2 establishes an input midpoint
bias using a simple resistive divider from the +5V supply
(two 806Ω resistors). The input signal is then AC coupled
into this midpoint voltage bias. The input voltage can swing
to within 1.3V of either supply pin, giving a 2.4Vp-p input
signal range centered between the supply pins. The input
impedance matching resistor (57.6Ω) used for testing is
adjusted to give a 50Ω input match when the parallel
combination of the biasing divider network is included. The
gain resistor (RG) is AC coupled, giving the circuit a DC
gain of +1—which puts the input DC bias voltage (2.5V) on
the output as well. The feedback resistor value has been
adjusted from the bipolar supply condition to re-optimize for
a flat frequency response in +5V, gain of +4, operation.
Again, on a single +5V supply, the output voltage can swing
to within 1V of either supply pin while delivering more than
200mA output current. A demanding 100Ω load to a mid­point bias is used in this characterization circuit. The new
output stage used in the OPA2677 can deliver large bipolar
output currents into this midpoint load with minimal cross­over distortion, as shown by the +5V supply, harmonic
distortion plots.

FIGURE 1. DC-Coupled, G = +4, Bipolar Supply, Specifi-

cation and Test Circuit.

FIGURE 2. AC-Coupled, G = +4, Single Supply Specifica-

tion and Test Circuit.

1/2

OPA2677

+6V

+

–6V

50Ω Load

50Ω

50ΩV

O

V

I

50Ω Source

R

G

133Ω

R

F

402Ω

+

6.8µF

0.1µF 6.8µF

0.1µF

+V

S

–V

S

1/2

OPA2677

+5V

+V

S

VS/2

806Ω

100ΩV

O

V

I

57.6Ω

806Ω

R

F

453Ω

R

G

150Ω

0.1µF

0.1µF

6.8µF

+

0.1µF