Burr Brown OPA621KU-2K5, OPA621KU Datasheet

©

1989 Burr-Brown Corporation PDS-939F Printed in U.S.A. June, 1997

FEATURES

● LOW NOISE: 2.3nV/√Hz

● LOW DIFFERENTIAL GAIN/PHASE ERROR

● HIGH OUTPUT CURRENT: 150mA

● FAST SETTLING: 25ns (0.01%)

● GAIN-BANDWIDTH: 500MHz

● STABLE IN GAINS:

≥ 2V/V

● LOW OFFSET VOLTAGE:

±100µV

● SLEW RATE: 500V/

µs

● 8-PIN DIP, SOIC PACKAGES

Wideband Precision

OPERATIONAL AMPLIFIER

APPLICATIONS

● LOW NOISE PREAMPLIFIER

● LOW NOISE DIFFERENTIAL AMPLIFIER

● HIGH-RESOLUTION VIDEO

● LINE DRIVER

● HIGH-SPEED SIGNAL PROCESSING

● ADC/DAC BUFFER

● ULTRASOUND

● PULSE/RF AMPLIFIERS

● ACTIVE FILTERS

DESCRIPTION

The OPA621 is a precision wideband monolithic opera­tional amplifier featuring very fast settling time, low
differential gain and phase error, and high output
current drive capability.

The OPA621 is stable in gains of ±2V/V or higher. This
amplifier has a very low offset, fully symmetrical
differential input due to its “classical” operational am­plifier circuit architecture. Unlike “current-feedback”

Current

Mirror

Output

Stage

3

2

Non-Inverting

Input

Inverting

Input

7

+V

CC

4

–V

CC

6

Output

®

OPA621

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]

amplifier designs, the OPA621 may be used in all op
amp applications requiring high speed and precision.

Low noise and distortion, wide bandwidth, and high
linearity make this amplifier suitable for RF and video
applications. Short circuit protection is provided by an
internal current-limiting circuit.

The OPA621 is available in DIP and SO-8 packages.

®

OPA621

2

OPA621KP, KU
PARAMETER CONDITIONS MIN TYP MAX UNITS
INPUT NOISE

Voltage: f

O

= 100Hz RS = 0Ω 10 nV/√Hz

f

O

= 1kHz 5.5 nV/√Hz

f

O

= 10kHz 3.3 nV/√Hz

f

O

= 100kHz 2.5 nV/√Hz

f

O

= 1MHz to 100MHz 2.3 nV/√Hz

f

B

= 100Hz to 10MHz 8.0 µV, rms

Current: f

O

= 10kHz to 100MHz 2.3 pA/√Hz

OFFSET VOLTAGE

(1)

Input Offset Voltage VCM = 0VDC ±200 ±1mV µV
Average Drift T

A

= T

MIN

to T

MAX

±12 µV/°C

Supply Rejection ±V

CC

= 4.5V to 5.5V 50 60 dB

BIAS CURRENT

Input Bias Current V

CM

= 0VDC 18 30 µA

OFFSET CURRENT

Input Offset Current V

CM

= 0VDC 0.2 2 µA

INPUT IMPEDANCE

Differential Open-Loop 15

|| 1 kΩ || pF

Common-Mode 1

|| 1 MΩ || pF

INPUT VOLTAGE RANGE

Common-Mode Input Range ±3.0 ±3.5 V
Common-Mode Rejection V

IN

= ±2.5VDC, VO = 0VDC 65 75 dB

OPEN-LOOP GAIN, DC

Open-Loop Voltage Gain R

L

= 100Ω 50 60 dB

R

L

= 50Ω 48 58 dB

FREQUENCY RESPONSE

Closed-Loop Bandwidth
(–3dB) Gain = +2V/V 500 MHz

Gain = +5V/V 100 MHz

Gain = +10V/V 50 MHz
Gain-Bandwidth Product Gain ≥ +10V/V 500 MHz
Differential Gain 3.58MHz, G = +2V/V 0.05 %
Differential Phase 3.58MHz, G = +2V/V 0.05 Degrees
Harmonic Distortion G = +2V/V, f = 10MHz, V

O

= 2Vp-p

f = 10MHz, Second Harmonic –62 –50 dBc

(3)

Third Harmonic –80 –70 dBc
Full Power Bandwidth V

O

= 5Vp-p, Gain = +2V/V 22 32 MHz

V

O

= 2Vp-p, Gain = +2V/V 55 80 MHz
Slew Rate 2V Step, Gain = –2V/V 350 500 V/µs
Overshoot 2V Step, Gain = –2V/V 15 %
Settling Time: 0.1% 2V Step, Gain = –2V/V 15 ns

0.01% 25 ns
Phase Margin Gain = +2V/V 50 Degrees
Rise Time Gain = +2V/V, 10% to 90%

V

O

= 100mVp-p; Small Signal 1.8 ns

V

O

= 6Vp-p; Large Signal 8 ns

RATED OUTPUT

Voltage Output R

L

= 100Ω±3.0 ±3.5 V

R

L

= 50Ω±2.5 ±3.0 V
Output Resistance 1MHz, Gain = +2V/V 0.015 Ω
Load Capacitance Stability Gain = +2V/V 15 pF
Short Circuit Current Continuous ±150 mA

POWER SUPPLY

Rated Voltage ±V

CC

5 VDC

Derated Performance ±V

CC

4.0 6.0 VDC

Current, Quiescent I

O

= 0mA 26 28 mA

TEMPERATURE RANGE

Specification: KP, KU Ambient Temperature –40 +85 °C
Operating: KP, KU –40 +85 °C

θ

JA

KP 100 °C/W
KU 125 °C/W

SPECIFICATIONS

ELECTRICAL

At VCC = ±5VDC, RL = 100Ω, and TA = +25°C, unless otherwise noted.

®

OPA621

3

SPECIFICATIONS (CONT)

ELECTRICAL (FULL TEMPERATURE RANGE SPECIFICATIONS)

At VCC = ±5VDC, RL = 100Ω, and TA = T

MIN

to T

MAX

, unless otherwise noted.

OPA621KP, KU
PARAMETER CONDITIONS MIN TYP MAX UNITS

TEMPERATURE RANGE

Specification: KP, KU Ambient Temperature –40 +85 °C

OFFSET VOLTAGE

(1)

Average Drift Full Temperature Range ±12 µV/°C
Supply Rejection ±V

CC

= 4.5V to 5.5V 45 60 dB

BIAS CURRENT

Input Bias Current Full Temperature, V

CM

= 0VDC 18 40 µA

OFFSET CURRENT

Input Offset Current Full Temperature, V

CM

= 0VDC 0.2 5 µA

INPUT VOLTAGE RANGE

Common-Mode Input Range ±2.5 ±3.0 V
Common-Mode Rejection V

IN

= ±2.5VDC, VO = 0VDC 60 75 dB

OPEN LOOP GAIN, DC

Open-Loop Voltage Gain R

L

= 100Ω 46 60 dB

R

L

= 50Ω 44 58 dB

RATED OUTPUT

Voltage Output R

L

= 100Ω±3.0 ±3.5 V

R

L

= 50Ω±2.5 ±3.0 V

POWER SUPPLY

Current, Quiescent I

O

= 0mA 26 30 mA

NOTES: (1) Offset Voltage specifications are also guaranteed with units fully warmed up. (2) Parameter is guaranteed by characterization. (3) dBc = dB referred
to carrier-input signal.

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.

®

OPA621

4

OPA621

Basic Model Number
Performance Grade Code

K = –40°C to +85°C

Package Code

P = 8-pin Plastic DIP
U = 8-pin Plastic SO-8

PIN CONFIGURATION

1
2
3
4

8
7
6
5

No Internal Connection
Positive Supply (+V )
Output
No Internal Connection

No Internal Connection

Inverting Input

Non-Inverting Input

Negative Supply (–V )

CC

CC

ORDERING INFORMATION

Top View

DIP/SO-8

ABSOLUTE MAXIMUM RATINGS

NOTE: (1) Packages must be derated based on specified θ JA. Maximum TJ must
be observed.

Supply .............................................................................................±7VDC

Internal Power Dissipation

(1)

.......................... See Applications Information

Differential Input Voltage............................................................. Total V

CC

Input Voltage Range .................................... See Applications Information

Storage Temperature Range KP, KU: ............................ –40°C to +125°C

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

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

Output Short Circuit to Ground (+25°C) .................. Continuous to Ground

Junction Temperature (T

J

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

PACKAGE DRAWING

PRODUCT PACKAGE NUMBER

(1)

OPA621KP 8-Pin Plastic DIP 006
OPA621KU 8-Pin SO-8 182

NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.

PACKAGE INFORMATION

ELECTROSTATIC
DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.

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 its published
specifications.

()()

®

OPA621

5

A = +2V/V CLOSED-LOOP

SMALL-SIGNAL BANDWIDTH

V

Frequency (Hz)

+10

+8

+6

+2

0

–2

1M 10M 100M 1G

0

–45

–90

–135

–180

Gain (dB)

+4

Phase Shift (°)

A

OL

PM 50°

Gain

Open-Loop Phase

≈

f 500MHz

–3dB

≈

A = +5V/V CLOSED-LOOP BANDWIDTH

vs OUTPUT VOLTAGE SWING

V

Frequency (Hz)

8

6

0

1M 10M 100M 1G

Output Voltage (Vp-p)

4

1k 10k 100k

2

Ω

R = 50

L

A = +10V/V CLOSED-LOOP

SMALL-SIGNAL BANDWIDTH

V

Frequency (Hz)

+24

+22

+20

+16

+14

+12

1M 10M 100M 1G

0

–45

–90

–135

–180

Gain (dB)

+18

Phase Shift (°)

A

OL

PM 80°

Gain

Open-Loop Phase

≈

f 50MHz

–3dB

≈

A = +5V/V CLOSED-LOOP

SMALL-SIGNAL BANDWIDTH

V

Frequency (Hz)

+18

+16

+14

+10

+8

+6

1M 10M 100M 1G

0

–45

–90

–135

–180

Gain (dB)

+12

Phase Shift (°)

A

OL

PM 70°

Gain

Open-Loop Phase

≈

f 100MHz

–3dB

≈

OPEN-LOOP FREQUENCY RESPONSE

Frequency (Hz)

1k 10k 100k 1M 10M 100M 1G

80

60

40

20

0

–20

Open-Loop Voltage Gain (dB)

Gain

Phase

Phase
Margin
50°

≈

0

–45

–90

–135

–180

Phase Shift (°)

TYPICAL PERFORMANCE CURVES

At VCC = ±5VDC, RL = 100Ω, and TA = +25°C, unless otherwise noted.

A = +2V/V CLOSED-LOOP BANDWIDTH

vs OUTPUT VOLTAGE SWING

V

Frequency (Hz)

8

6

0

1M 10M 100M 1G

Output Voltage (Vp-p)

4

1k 10k 100k

2

ΩR = 50

L