OPA642N BURR-BROWN [Burr-Brown Corporation], OPA642N Datasheet

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OPA642N

Manufacturer Part Number
OPA642N
Description
Wideband, Low Distortion, Low Gain OPERATIONAL AMPLIFIER
Manufacturer
BURR-BROWN [Burr-Brown Corporation]
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
OPA642N/250
Manufacturer:
TI/德州仪器
Quantity:
20 000
Part Number:
OPA642NB/250
Manufacturer:
TI/德州仪器
Quantity:
20 000
FEATURES
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 architec-
ture with two internal gain stages, the OPA642 achieves
exceptionally low harmonic distortion over a wide
frequency range. The “classic” differential input pro-
vides all the familiar benefits of precision op amps,
such as bias current cancellation and very low invert-
ing current noise compared with wideband current
©
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
1993 Burr-Brown Corporation
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
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: 60mA
VERY LOW DIFF GAIN/PHASE ERROR:
0.007%/0.008
1Vp-p
5MHz
Wideband, Low Distortion, Low Gain
402
®
High Dynamic Range 10MSPS Digitizer
OPA642
OPERATIONAL AMPLIFIER
+5V
–5V
402
2Vp-p
0.1µF
24
PDS-1190F
5k
5k
1
100pF
APPLICATIONS
feedback op amps. Fast settling time, excellent differ-
ential 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 driv-
ers, wideband integrators and low distortion ADC buff-
ers. Where higher gain or even lower harmonic distor-
tion is required, consider the OPA643—a higher gain-
bandwidth and lower noise version of the OPA642
ADC/DAC BUFFER AMPLIFIER
LOW DISTORTION IF AMPLIFIER
HIGH RESOLUTION IMAGING
MEDICAL IMAGING
LOW NOISE PREAMPLIFIER
HIGH CMR DIFFERENCING AMPLIFIER
TEST INSTRUMENTATION
PROFESSIONAL AUDIO
10MSPS
0.1µF
0.1µF
clk
REFT
Analog
REFB
Input
10MSPS
ADS804
12-Bit
+5V
Printed in U.S.A. February, 1998
80dB SFDR
Measured
OPA642
OPA642
®

Related parts for OPA642N

OPA642N Summary of contents

Page 1

Wideband, Low Distortion, Low Gain OPERATIONAL AMPLIFIER 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/ ...

Page 2

SPECIFICATIONS ELECTRICAL + 5V 100 , R = 402 , unless otherwise noted PARAMETER OFFSET VOLTAGE Input Offset Voltage Average Drift Power Supply Rejection (PSR) INPUT BIAS ...

Page 3

... 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. The information provided herein is believed to be reliable ...

Page 4

TYPICAL PERFORMANCE CURVES + 5V 100 , R = 402 , G = +2, unless otherwise noted SMALL SIGNAL FREQUENCY RESPONSE 0.1Vp ...

Page 5

TYPICAL PERFORMANCE CURVES + 5V 100 , R = 402 , G = +2, unless otherwise noted 5MHz 2ND HARMONIC DISTORTION – 100 G = ...

Page 6

TYPICAL PERFORMANCE CURVES + 5V 100 , R = 402 , G = +2, unless otherwise noted 2ND HARMONIC DISTORTION vs FREQUENCY – 2Vp-p O ...

Page 7

TYPICAL PERFORMANCE CURVES + 5V 100 , R = 402 , G = +2, unless otherwise noted CMR AND PSR vs FREQUENCY 100 CMR 90 PSR 80 ...

Page 8

APPLICATIONS INFORMATION WIDEBAND VOLTAGE FEEDBACK OPERATION The OPA642’s combination of speed and dynamic range is easily achieved in a wide variety of application circuits, providing that simple principles of good design practice are observed. For example, good power supply decoupling, ...

Page 9

The circuit of Figure 1 applies to ...

Page 10

DAC TRANSIMPEDANCE AMPLIFIER High frequency DDC DACs require a low distortion output amplifier to retain their SFDR performance into real-world loads. A single-ended output drive implementation is shown in Figure 4. In this circuit, only one side of the complemen- ...

Page 11

In the inverting configuration, an additional design consid- eration must be noted. R becomes the input resistor and G therefore the load impedance to the driving source. If imped- ance matching is desired, R may be set equal to the ...

Page 12

while in the inverting F G configuration this is just R (Figure 1). Increasing output F voltage swing increases harmonic distortion directly. A 6dB increase in output swing will generally increase ...

Page 13

This optimum turns ratio is calculated by N Nearest Integer OPT N This optimum will depend strongly on the amplifier and configuration selected 7V/V [16.9dB ...

Page 14

... Note that it is the power in the output stage and not into the load that determines internal power dissipation worst case example, compute the maximum T OPA642N (SOT23-5 package) in the circuit of Figure 1 operating at the maximum specified ambient temperature of + 10V • 26mA +5^2 /(4 • (100 D 330mW ...

Page 15

Socketing a high speed part like the OPA642 is not recommended. The additional lead length and pin-to-pin capacitance introduced by the socket can create an ex- tremely troublesome parasitic network which can make it almost impossible to achieve a ...

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