OPA650

OPA650

FEATURES

LOW POWER: 50mW

UNITY GAIN STABLE BANDWIDTH:

560MHz

LOW HARMONICS: –77dBc at 5MHz

FAST SETTLING TIME: 20ns to 0.01%

LOW INPUT BIAS CURRENT: 5

DIFFERENTIAL GAIN/PHASE ERROR:

0.01%/0.03

HIGH OUTPUT CURRENT: 85mA

DESCRIPTION

The OPA650 is a low power, wideband voltage feed-

back operational amplifier. It features a high band-

width of 560MHz as well as a 12-bit settling time of

only 20ns. The low distortion allows its use in commu-

nications applications, while the wide bandwidth and

true differential input stage make it suitable for use in

a variety of active filter applications. Its low distortion

gives exceptional performance for telecommunica-

tions, medical imaging and video applications.

The OPA650 is internally compensated for unity-gain

stability. This amplifier has a fully symmetrical differ-

ential input due to its “classical” operational amplifier

circuit architecture. Its unusual combination of speed,

accuracy and low power make it an outstanding choice

for many portable, multi-channel and other high speed

applications, where power is at a premium.

The OPA650 is also available in dual (OPA2650) and

quad (OPA4650) configurations.

Wideband, Low Power Voltage Feedback

OPERATIONAL AMPLIFIER

OPA650

APPLICATIONS

HIGH RESOLUTION VIDEO

BASEBAND AMPLIFIER

CCD IMAGING AMPLIFIER

ULTRASOUND SIGNAL PROCESSING

ADC/DAC GAIN AMPLIFIER

ACTIVE FILTERS

HIGH SPEED INTEGRATORS

DIFFERENTIAL AMPLIFIER

OPA650

Current

Mirror

Output

Stage

Inverting

Input

Non-Inverting

Input

Output

–V

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111

Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

PDS-1264F

Printed in U.S.A. March, 1998

OPA650

NOTES: (1) An asterisk (

) specifies the same value as the grade to the left. (2) Frequency response can be strongly influenced by PC board parasitics. The OPA650

is nominally compensated assuming 2pF parasitic load. The demonstration boards show low parasitic layouts for the different package styles.

SPECIFICATIONS

At T

= +25

C, V

5V, R

= 100

Ω

, and R

= 402

Ω,

unless otherwise noted. R

= 25

Ω

for a gain of +1.

OPA650P, U, N

OPA650UB, NB

PARAMETER

CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

FREQUENCY RESPONSE

Closed-Loop Bandwidth

(2)

G = +1

560

(1)

MHz

G = +2

140

MHz

G = +5

MHz

G = +10

MHz

Gain Bandwidth Product

180

MHz

Slew Rate

G = +1, 2V Step

240

Over Specified Temperature

220

Rise Time

0.2V Step

Fall Time

0.2V Step

Settling Time

0.01%

G = +1, 2V Step

19.6

0.1%

G = +1, 2V Step

10.2

G = +1, 2V Step

6.3

Spurious Free Dynamic Range

G = +1, f = 5.0 MHz, V

= 2Vp-p

= 100

Ω

dBc

= 200

Ω

dBc

Differential Gain

G = +1, NTSC, V

= 1.4Vp, R

= 150

Ω

0.01

Differential Phase

G = +1, NTSC, V

= 1.4Vp, R

= 150

Ω

0.03

Degrees

Bandwidth for 0.1dB Gain Flatness

G = +2

MHz

INPUT OFFSET VOLTAGE

Input Offset Voltage

0.6

2.5

Average Drift

Power Supply Rejection (+V

)

| = 4.5V to 5.5V

(–V

)

INPUT BIAS CURRENT

Input Bias Current

= 0V

Over Temperature

Input Offset Current

= 0V

0.5

0.2

0.5

Over Temperature

NOISE

Input Voltage Noise

Noise Density, f = 100Hz

nV/

√

f = 10kHz

9.4

nV/

√

f = 1MHz

8.4

nV/

√

f = 1MHz to 100MHz

8.4

nV/

√

Integrated Noise, BW = 10Hz to 100MHz

Vrms

Input Bias Current Noise

Current Noise Density, f = 0.1MHz to 100MHz

1.2

pA/

√

Noise Figure (NF)

= 10k

Ω

= 50

Ω

19.5

INPUT VOLTAGE RANGE

Common-Mode Input Range

2.8

Over Specified Temperature

2.2

Common-Mode Rejection

0.5V

INPUT IMPEDANCE

Differential

15 || 1

Ω

|| pF

Common-Mode

16 || 1

Ω

|| pF

OPEN-LOOP GAIN

Open-Loop Voltage Gain

2V, R

= 100

Ω

Over Specified Temperature

2V, R

= 100

Ω

OUTPUT

Voltage Output

Over Specified Temperature

No Load

2.2

3.0

2.4

= 250

Ω

2.2

2.5

2.4

= 100

Ω

2.0

2.3

2.2

Current Output, Sourcing

110

Over Specified Temperature

Current Output, Sinking

Over Specified Temperature

Short Circuit Current

150

Output Resistance

0.1MHz, G = +1

0.08

Ω

POWER SUPPLY

Specified Operating Voltage

Derated Voltage Range

4.5

5.5

Quiescent Current

5.1

7.75

5.1

6.5

Over Specified Temperature

8.75

7.5

TEMPERATURE RANGE

Specification: P, U, N, UB, NB

–40

+85

Thermal Resistance,

8-Pin DIP

100

C/W

SO-8

125

C/W

SOT23-5

150

C/W

OPA650

–Input

Output

–V

+Input

Output

–Input

+Input

–V

Supply ...............................................................................................

5.5V

Internal Power Dissipation .................................. See Thermal Conditions

Differential Input Voltage ..................................................................

1.2V

Input Voltage Range ............................................................................

Storage Temperature Range: P, U, UB, N, NB ............ –40

C to +125

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

(soldering, SOIC 3s) ....................................... +260

Junction Temperature (T

) ............................................................ +175

ABSOLUTE MAXIMUM RATINGS

PIN CONFIGURATION

Top View

DIP/SO-8

SOT23-5

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.

ELECTROSTATIC

DISCHARGE SENSITIVITY

Electrostatic discharge can cause damage ranging from per-

formance 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 speci-

fications.

PACKAGE

DRAWING

TEMPERATURE

PACKAGE

ORDERING

PRODUCT

PACKAGE

NUMBER

(1)

RANGE

MARKING

(2)

NUMBER

(3)

OPA650U

SO-8 Surface Mount

182

–40

C to +85

OPA650U

OPA650UB

SO-8 Surface Mount

182

–40

C to +85

OPA650UB

OPA650N

5-pin SOT23-5

331

–40

C to +85

A50

OPA650N-250

OPA650N-3k

OPA650NB

5-pin SOT23-5

331

–40

C to +85

A50B

OPA650NB-250

OPA650NB-3k

OPA650P

8-Pin Plastic DIP

006

–40

C to +85

OPA650P

NOTE: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) The “B” grade of the SO-8 package

will be marked with a “B” by pin 8. The “B” grade of the SOT23-5 will be marked with a “B” near pins 3 and 4. (3) The SOT23-5 is only available on a 7" tape and reel

(e.g. ordering 250 pieces of “OPA650N-250” will get a single 250 piece tape and reel. Ordering 3000 pieces of “OPA650N-3k” will get a single 3000 piece tape and reel).

Please refer to Appendix B of Burr-Brown IC Data Book for detailed Tape and Reel Mechanical information.

PACKAGE/ORDERING INFORMATION

OPA650

TYPICAL PERFORMANCE CURVES

At T

= +25

C, V

5V, R

= 100

Ω

, and R

= 402

Ω,

unless otherwise noted. R

= 25

Ω

for Gain of +1.

INPUT BIAS CURRENT AND OFFSET VOLTAGE

vs TEMPERATURE

–1

–50

–25

100

Input Bias Current (mA)

Offset Voltage (mV)

Temperature (°C)

INPUT VOLTAGE AND CURRENT NOISE

vs FREQUENCY

Frequency (Hz)

100

10k

100k

100

Input Current Noise (pA/

√

Hz)

Input Voltage Noise (nV/

√

Hz)

Non-inverting and

Inverting Current Noise

Voltage Noise

SUPPLY CURRENT vs TEMPERATURE

–60

–40

–20

100

Supply Current (±mA)

Temperature (°C)

OUTPUT CURRENT vs TEMPERATURE

110

100

–50

–25

100

Output Current (±mA)

Temperature (°C)

–

COMMON-MODE REJECTION

vs INPUT COMMON-MODE VOLTAGE

100

–4

–3

–2

–1

Common Mode-Rejection (dB)

Common-Mode Voltage (V)

, PSR AND CMRR vs TEMPERATURE

100

–50

–25

125

, PSR and CMRR (dB)

Temperature (°C)

PSR–

CMRR

PSR+

OPA650

TYPICAL PERFORMANCE CURVES

(CONT)

At T

= +25

C, V

5V, R

= 100

Ω

, and R

= 402

Ω,

unless otherwise noted. R

= 25

Ω

for Gain of +1.

LARGE SIGNAL TRANSIENT RESPONSE

(G = +1)

Time (5ns/div)

2.0

1.6

1.2

0.8

0.4

–0.4

–0.8

–1.2

–1.6

–2.0

Output Voltage (V)

CLOSED-LOOP BANDWIDTH (G = +1)

Frequency (Hz)

–3

–6

–9

10M

100M

Gain (dB)

DIP Bandwidth

= 520MHz

SO-8 Bandwidth

= 560MHz

CLOSED-LOOP BANDWIDTH (G = +5)

Frequency (Hz)

–1

10M

100M

Gain (dB)

SO-8/DIP Bandwidth = 37MHz

CLOSED-LOOP BANDWIDTH (G = +2)

Frequency (Hz)

–3

–6

–9

–12

10M

100M

Gain (dB)

SO-8/DIP Bandwidth = 140MHz

RECOMMENDED ISOLATION RESISTANCE

vs CAPACITIVE LOAD

100

Isolation Resistance, R

ISO

(

Ω

)

Capacitive Load, C

(pF)

OPA650

Ω

ISO

Ω

SMALL SIGNAL TRANSIENT RESPONSE

(G = +1)

Time (5ns/div)

200

160

120

–40

–80

–120

–160

–200

Output Voltage (mV)

OPA650

TYPICAL PERFORMANCE CURVES

(CONT)

At T

= +25

C, V

5V, R

= 100

Ω

, and R

= 402

Ω,

unless otherwise noted. R

= 25

Ω

for Gain of +1.

HARMONIC DISTORTION vs FREQUENCY

(G = +1, V

= 2Vp-p, R

= 100

Ω

)

Frequency (Hz)

Harmonic Distortion (dBc)

–40

–50

–60

–70

–80

–90

100k

10M

100M

HARMONIC DISTORTION vs TEMPERATURE

= 5MHz, V

= 2Vp-p, G = +1)

–50

–60

–70

–80

–90

–60

–40

–20

100

Harmonic Distortion (dBc)

Temperature (°C)

5MHz HARMONIC DISTORTION

vs OUTPUT SWING

Output Swing (Vp-p)

–60

–70

–80

–90

–100

0.1

Harmonic Distortion (dBc)

G = +2

10MHz HARMONIC DISTORTION

vs OUTPUT SWING

Output Swing (Vp-p)

–50

–60

–70

–80

–90

0.1

Harmonic Distortion (dBc)

OPEN-LOOP GAIN AND PHASE

vs FREQUENCY

+45

–45

–90

–135

–180

–225

10k

100k

10M

100M

Gain (dB)

Phase (°)

Frequency (Hz)

Phase

Gain

CLOSED LOOP BANDWIDTH (G = +10)

Frequency (Hz)

10M

100M

SO-8/DIP Bandwidth = 18MHz

Gain (dB)

OPA650

the ground and power plane layout should not be in close

proximity to the signal I/O pins. Avoid narrow power and

ground traces to minimize inductance between the pins and

the decoupling capacitors. Larger (2.2

F to 6.8

F) decoupling

capacitors, effective at lower frequencies, should also be

used. These may be placed somewhat farther from the

device and may be shared among several devices in the same

area of the PC board.

c) Careful selection and placement of external compo-

nents will preserve the high frequency performance of the

OPA650. Resistors should be a very low reactance type.

Surface mount resistors work best and allow a tighter overall

layout. Metal film or carbon composition axially-leaded

resistors can also provide good high frequency performance.

Again, keep their leads as short as possible. Never use

wirewound type resistors in a high frequency application.

Since the output pin and the inverting input pin are most

sensitive to parasitic capacitance, always position the feed-

back and series output resistor, if any, as close as possible to

the package pins. Other network components, such as non-

inverting input termination resistors, should also be placed

close to the package.

Even with a low parasitic capacitance shunting external

resistors, excessively high resistor values can create signifi-

cant time constants and degrade performance. Good metal

film or surface mount resistors have approximately 0.2pF in

shunt with the resistor. For resistor values > 1.5k

Ω

, this adds

a pole and/or zero below 500MHz that can affect circuit

operation. Keep resistor values as low as possible consistent

with output loading considerations. The 402

Ω

feedback

used for the Typical Performance Plots is a good starting

point for design. Note that a 25

Ω

feedback resistor, rather

than a direct short, is suggested for a unity gain follower.

This effectively reduces the Q of what would otherwise be

a parasitic inductance (the feedback wire) into the parasitic

capacitance at the inverting input.

TYPICAL PERFORMANCE CURVES

(CONT)

At T

= +25

C, V

5V, R

= 100

Ω

, and R

= 402

Ω,

unless otherwise noted. R

= 25

Ω

for Gain of +1.

HARMONIC DISTORTION vs GAIN

= 5MHz, V

= 2Vp-p)

–40

–50

–60

–70

–80