Burr Brown OPA642U-2K5, OPA642UB-2K5, OPA642NB-250, OPA642P, OPA642PB Datasheet

®

OPA642

1

10MSPS

clk

402Ω

24Ω

1Vp-p
5MHz

OPA642

100pF

REFT

+5V

REFB

ADS804

12-Bit

10MSPS

Measured

80dB SFDR

Analog

Input

402Ω

0.1µF

0.1µF

5kΩ

High Dynamic Range 10MSPS Digitizer

5kΩ

0.1µF

2Vp-p

+5V

–5V

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/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]

Wideband, Low Distortion, Low Gain

OPERATIONAL AMPLIFIER

APPLICATIONS

● ADC/DAC BUFFER AMPLIFIER

● LOW DISTORTION IF AMPLIFIER

● HIGH RESOLUTION IMAGING

● MEDICAL IMAGING

● LOW NOISE PREAMPLIFIER

● HIGH CMR DIFFERENCING AMPLIFIER

● TEST INSTRUMENTATION

● PROFESSIONAL AUDIO

FEATURES

● LOW DISTORTION: –95dBc at 5MHz

● GAIN OF +1 BANDWIDTH: 400MHz

● AVAILABLE IN SOT23-5 PACKAGE

● HIGH OPEN LOOP GAIN: 95dB

● HIGH COMMON-MODE REJECTION: 90dB

● FAST 12-BIT SETTLING: 13ns (0.01%)

● LOW NOISE: 2.7nV/√Hz

● HIGH OUTPUT CURRENT:

±60 mA

● VERY LOW DIFF GAIN/PHASE ERROR:

0.007%/0.008

°

®

OPA642

OPA642

OPA658

OPA642

DESCRIPTION

The OPA642 provides a level of speed and dynamic
range previously unattainable in a monolithic op amp.
Using a unity gain stable voltage feedback architec­ture with two internal gain stages, the OPA642 achieves
exceptionally low harmonic distortion over a wide
frequency range. The “classic” differential input pro­vides all the familiar benefits of precision op amps,
such as bias current cancellation and very low invert­ing current noise compared with wideband current

feedback op amps. Fast settling time, excellent differ­ential gain/phase performance, low voltage noise and
high output current drive make the OPA642 ideal for
most high dynamic range applications.

Unity gain stability makes the OPA642 particularly
suitable for low gain differential amplifiers,
transimpedance amplifiers, gain of +2 video line driv­ers, wideband integrators and low distortion ADC buff­ers. Where higher gain or even lower harmonic distor­tion is required, consider the OPA643—a higher gain­bandwidth and lower noise version of the OPA642

©

1993 Burr-Brown Corporation PDS-1190F Printed in U.S.A. February, 1998

2

®

OPA642

OPA642P, U, N OPA642PB, UB, NB

PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS

SPECIFICATIONS

ELECTRICAL

At TA = +25°C, VS = ±5V, RL = 100Ω, RF = 402Ω, unless otherwise noted. RF = 25Ω for a gain of +1.

OFFSET VOLTAGE

Input Offset Voltage ±1.5 ±4 ±0.5 ±1.0 mV

Average Drift 42µV/°C

Power Supply Rejection (PSR) V

S

= ±4.5 to ±5.5V 65 85 73 95 dB

INPUT BIAS CURRENT

Input Bias Current V

CM

= 0V 25 45 ✻✻ µA

Over Specified Temperature 70 ✻✻ µA

Input Offset Current V

CM

= 0V 0.1 2.0 ✻✻ µA

Over Specified Temperature 3.0 ✻✻ µA

NOISE

Input Voltage Noise

Noise Density: f ≥ 1MHz 2.7 ✻ nV/√Hz
Integrated Voltage Noise, BW = 100Hz to 100MHz 27 ✻ µVrms

Input Bias Current Noise Density

f ≥ 1MHz 2.8 ✻ pA/√Hz

INPUT VOLTAGE RANGE

Common-Mode Input Range ±2.75 ±3.0 ✻✻ V

Over Temperature ±2.5 ✻ V

Common-Mode Rejection (CMR) V

CM

= ±0.5V 65 90 80 ✻ dB

INPUT IMPEDANCE

Differential 11 || 1 ✻ kΩ || pF
Common-Mode 650 || 1 ✻ kΩ || pF

OPEN-LOOP GAIN

Open-Loop Voltage Gain (A

OL

)V

O

= ±2V, RL = 100Ω 80 95 85 98 dB

Over Specified Temperature 80 ✻ dB

FREQUENCY RESPONSE

Closed-Loop Response Gain = +1V/V 400 ✻ MHz

Gain = +2V/V 150 ✻ MHz
Gain = +5V/V 45 ✻ MHz

Gain = +10V/V 21 ✻ MHz
Gain Bandwidth Product (GBP) 210 ✻ MHz
Slew Rate

(1)

G = +1, 2V Step 380 ✻ V/µs

At Minimum Specified Temperature G = +1, 2V Step 340 ✻ V/µs

Settling Time: 0.01% G = +1, 1V Step 13 ✻ ns

0.1% G = +1, 1V Step 11.5 ✻ ns
1% G = +1, 1V Step 3.5 ✻ ns

Spurious Free Dynamic Range (SFDR) G = +1, f = 5MHz 92 95 dBc

V

O

= 2Vp-p, RL = 100Ω

Diff. Gain Error at 3.58MHz, G = +2V/V V

O

= 0V to 1.4V, RL = 150Ω 0.007 ✻ %

Diff. Phase Error at 3.58MHz, G = +2V/V V

O

= 0V to 1.4V, RL = 150Ω 0.008 ✻ degrees

OUTPUT

Voltage Output No Load ±3.5 ✻ V

Over Specified Temperature ±3.0 ✻ V

Voltage Output R

L

= 100Ω±2.75 ✻ V

Over Specified Temperature ±2.5 ✻✻ V

Current Output, +25°C ±40 ±60 ±50 ±65 mA

Over Specified Temperature ±35 ±40 mA

Closed-Loop Output Resistance 0.1MHz, G = +1V/V 0.01 ✻ Ω

POWER SUPPLY

Specified Operating Voltage ±5 ✻ V
Operating Voltage Range T

MIN

to T

MAX

±4.5 ±5.5 ✻✻V

Quiescent Current ±20 ±25 ±16 ✻✻ mA

Over Specified Temperature ±26 ✻ mA

TEMPERATURE RANGE

Specification: P, U, N, PB, UB, NB Ambient –40 +85 ✻✻°C
Thermal Resistance

θ

JA

, Junction-to-Ambient °C/W
P, PB 8-Pin DIP 100 ✻ °C/W
U, UB 8-Pin SO-8 125 ✻ °C/W
N, NB 5-Pin SOT23-5 150 ✻ °C/W

✻ Indicates same specification as for OPA642P, U, N.
NOTE: (1) Slew rate is rate of change from 10% to 90% of output voltage step.

®

OPA642

3

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.

ABSOLUTE MAXIMUM RATINGS

Supply ..........................................................................................±6.0VDC

Internal Power Dissipation

(1)

.................................. See Thermal Analysis

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

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

S

Storage Temperature Range: P, PB, U, UB, N, NB ..... –40°C to +125°C

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

(soldering, SO-8 3s) ....................................... +260°C

Junction Temperature (T

J

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

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

θ

JA. Maximum

T

J

must be observed.

PIN CONFIGURATION

1

2
3
4

8

7
6
5

+V

S2

(1)

+V

S1

Output
–V

S2

(1)

NC

Inverting Input

Non-Inverting Input

–V

S1

NOTE: (1) Making use of all four power supply pins is recommended,
although not required. Using these four pins, instead of just pins 4 and 7, will
lower the power supply impedance improving distortion.

PACKAGE
DRAWING TEMPERATURE PACKAGE ORDERING

PRODUCT PACKAGE NUMBER

(1)

RANGE MARKING

(2)

NUMBER

(3)

OPA642U SO-8 Surface Mount 182 –40°C to +85°C OPA642U OPA642U
OPA642UB SO-8 Surface Mount 182 –40°C to +85°C OPA642UB OPA642UB
OPA642N 5-pin SOT23-5 331 –40°C to +85°C A42 OPA642N-250

OPA642N-3k

OPA642NB 5-pin SOT23-5 331 –40°C to +85°C A42B OPA642NB-250

OPA642NB-3k
OPA642P 8-Pin Plastic DIP 006 –40°C to +85°C OPA642P OPA642P
OPA642PB 8-Pin Plastic DIP 006 –40°C to +85°C OPA642PB OPA642PB

NOTES: (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 and
DIP packages 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 “OPA642N-250” will get a single 250 piece tape and reel. Ordering 3000 pieces of “OPA642N-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

ELECTROSTATIC
DISCHARGE SENSITIVITY

Electrostatic discharge can cause damage ranging from per­formance degradation to complete device failure. Burr­Brown 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.

1

2

3

54+V

S

Inverting Input

Output

–V

S

Non-Inverting Input

4

®

OPA642

TYPICAL PERFORMANCE CURVES

At TA = +25°C, VS = ±5V, RL = 100Ω, RF = 402Ω, G = +2, unless otherwise noted. RF = 25Ω for a gain of +1.

SMALL SIGNAL TRANSIENT RESPONSE

(G = +1, R

L

= 100Ω)

Time (5ns/div)

200
160
120

80
40

0
–40
–80

–120
–160
–200

Output Voltage (mV)

LARGE SIGNAL TRANSIENT RESPONSE

(G = +1, R

L

= 100Ω)

Time (5ns/div)

2.0

1.6

1.2

0.8

0.4
0

–0.4
–0.8
–1.2
–1.4
–2.0

Output Voltage (V)

LARGE SIGNAL FREQUENCY RESPONSE

Frequency

0.5MHz 10MHz 100MHz 500MHz

12

9
6
3
0

–3

–9
–12
–15
–18
–21

Gain (3dB/div)

G = +2
VO = 1Vp-p

VO = 2Vp-p

VO = 4Vp-p

RS vs CAPACITIVE LOAD

Capacitive Load (pF)

101 100

30

25

20

15

10

5

0

R

S

(Ω)

SMALL SIGNAL FREQUENCY RESPONSE

Frequency

0.5MHz 10MHz 100MHz 500MHz

6
3

0
–3
–6
–9

–12
–15
–18
–21
–24

Normalized Gain (3dB/div)

VO = 0.1Vp-p

G = +1

G = +2

G = +5

G = +10

FREQUENCY RESPONSE vs CAPACITIVE LOAD

Frequency (20MHz/div)

100MHz0 200MHz

12

9
6
3

0
–3
–6
–9

–12
–15
–18

Gain to Capacitive Load (3dB/div)

CL = 10pFG = +2

CL = 22pF

CL = 47pF

1kΩ

402Ω

(1kΩ is optional)

402Ω

OPA642

R

S

C

L

V

IN

V

O

CL = 100pF

®

OPA642

5

TYPICAL PERFORMANCE CURVES (CONT)

At TA = +25°C, VS = ±5V, RL = 100Ω, RF = 402Ω, G = +2, unless otherwise noted. RF = 25Ω for a gain of +1.

5MHz 2ND HARMONIC DISTORTION

Output Voltage Swing (Vp-p)

10.1 10

G = +2

–65

–70

–75

–80

–85

–90

–95

–100

2nd Harmonic Distortion (dBc)

RL = 100Ω

RL = 500Ω

RL = 200Ω

5MHz 3RD HARMONIC DISTORTION

Output Voltage Swing (Vp-p)

10.1 10

G = +2

–65

–70

–75

–80

–85

–90

–95

–100

3rd Harmonic Distortion (dBc)

RL = 100Ω, 200Ω, or 500Ω

10MHz 3RD HARMONIC DISTORTION

Output Voltage Swing (Vp-p)

10.1 10

G = +2

–60
–65
–70
–75
–80
–85
–90
–95

–100

3rd Harmonic Distortion (dBc)

RL = 100Ω

RL = 200Ω

RL = 500Ω

20MHz 3RD HARMONIC DISTORTION

Output Voltage Swing (Vp-p)

10.1 10

G = +2

–50
–55
–60
–65
–70
–75
–80
–85
–90

3rd Harmonic Distortion (dBc)

RL = 100Ω

RL = 200Ω

RL = 500Ω

20MHz 2ND HARMONIC DISTORTION

Output Voltage Swing (Vp-p)

10.1 10

G = +2

–50
–55
–60
–65
–70
–75
–80
–85
–90

2nd Harmonic Distortion (dBc)

RL = 200Ω

RL = 500Ω

RL = 100Ω

10MHz 2ND HARMONIC DISTORTION

Output Voltage Swing (Vp-p)

10.1 10

–60
–65
–70
–75
–80
–85
–90
–95

–100

2nd Harmonic Distortion (dBc)

G = +2

RL = 100Ω

RL = 200Ω

RL = 500Ω