BURR-BROWN OPA4650 User Manual

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OPA4650

OPA4650

OPA4650

DEMO BOARD

AVAILABLE

Wideband, Low Power, Quad Voltage Feedback

OPERATIONAL AMPLIFIER

FEATURES

● LOW POWER: 50mW/channel

● UNITY GAIN STABLE BANDWIDTH:

360MHz

● FAST SETTLING TIME: 20ns to 0.01%

● LOW INPUT BIAS CURRENT: 5

µA

● DIFFERENTIAL GAIN/PHASE ERROR:

0.01%/0.025

°

● 14-PIN DIP and SO-14 SURFACE MOUNT

PACKAGES AVAILABLE

APPLICATIONS

● HIGH RESOLUTION VIDEO

● MONITOR PREAMPLIFIER

● CCD IMAGING AMPLIFIER

● ULTRASOUND SIGNAL PROCESSING

● ADC/DAC BUFFER AMPLIFIER

● ACTIVE FILTERS

● HIGH SPEED INTEGRATORS

● DIFFERENTIAL AMPLIFIER

DESCRIPTION

The OPA4650 is a quad, low power, wideband voltage
feedback operational amplifier. It features a high band­width of 360MHz as well as a 12-bit settling time of
only 20ns. The low input bias current allows its use in
high speed integrator 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 telecommunications, medical imaging and video
applications.

The OPA4650 is internally compensated for unity­gain stability. This amplifier has a fully symmetrical
differential 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 OPA4650 is also available in single (OPA650)
and dual (OPA2650) configurations.

+V

S

Non-Inverting

Input

Output

Inverting

Input

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]

© 1994 Burr-Brown Corporation PDS-1267B Printed in U.S.A. July, 1995

Current

Mirror

–V

S

Simplified Schematic

1 of 4 Channels

Stage

C

C

Output

SPECIFICATIONS

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

OPA4650P, U
PARAMETER CONDITIONS MIN TYP MAX UNITS
FREQUENCY RESPONSE

Closed-Loop Bandwidth

Gain Bandwidth Product 160 MHz
Slew Rate

Rise Time 0.2V Step 1 ns
Fall Time 0.2V Step 1 ns
Settling Time 0.01% G = +1, 2V Step 20 ns

(2)

Over Specified Temperature 220 V/µs

Spurious Free Dynamic Range G = +1, f = 5.0 MHz, V

Differential Gain G = +2, NTSC, V
Differential Phase G = +2, NTSC, V
Bandwidth for 0.1dB Flatness G = +2 21 MHz

Crosstalk Input Referred, 5MHz, all hostile –63 dB

OFFSET VOLTAGE

Input Offset Voltage ±1 ±5.5 mV

Average Drift ±3 µV/°C

Power Supply Rejection (+V

INPUT BIAS CURRENT

Input Bias Current V

Over Temperature 30 µA

Input Offset Current V

Over Temperature 3.0 µA

INPUT NOISE

Input Voltage Noise

Noise Density, f = 100Hz 43 nV/√Hz

Integrated Noise, BW = 10Hz to 100MHz 84 µVp-p

Input Bias Current Noise

Current Noise Density, f = 0.1MHz to 100MHz 1.2 pA/√Hz

Noise Figure (NF)

INPUT VOLTAGE RANGE

Common-Mode Input Range ±2.8 V

Over Specified Temperature ±2.2 V

Common-Mode Rejection V

INPUT IMPEDANCE

Differential 15 || 1 kΩ || pF
Common-Mode 16 || 1 MΩ || pF

OPEN-LOOP GAIN

Open-Loop Voltage Gain V

Over Specified Temperature V

OUTPUT

Voltage Output

Over Specified Temperature No Load ±2.2 ±3.0 V

Output Current, Sourcing 75 110 mA

Over Temperature Range 65 mA

Output Current, Sinking 65 85 mA

Over Temperature Range 35 mA
Short-Circuit Current 150 mA
Output Resistance 0.1MHz, G = +1 0.08 Ω

POWER SUPPLY

Specified Operating Voltage ±5V
Operating Voltage Range ±4.5 ±5.5 V
Quiescent Current All Channels ±23 ±32 mA

Over Specified Temperature ±35 mA

TEMPERATURE RANGE

Specification: P, U –40 +85 °C
Thermal Resistance,

NOTES: (1) Frequency response can be strongly influenced by PC board parasites. The OPA4650 is nominally compensated assuming 2pF parasitic load. The
demonstration board, DEM-OPA465xP, shows a low parasitic layout for this part. (2) Slew rate is rate of change from 10% to 90% of output voltage step.

(1)

G = +1 360 MHz
G = +2 120 MHz
G = +5 35 MHz

G = +10 16 MHz

G = +1, 2V Step 240 V/µs

0.1% G = +1, 2V Step 10.3 ns
1% G = +1, 2V Step 7.9 ns

= 100Ω 68 dBc

R

L

= 402Ω 74 dBc

R

L

O
O

= 2Vp-p

O

= 1.4Vp, RL = 150Ω 0.01 %
= 1.4Vp, RL = 150Ω 0.025 Degrees

Input Referred, 5MHz, Channel-to-Channel –66 dB

)|V

S

) 47 52 dB

(–V

S

| = 4.5V to 5.5V 60 76 dB

S

= 0V 5 20 µA

CM

= 0V 0.5 1.0 µA

CM

f = 10kHz 9.4 nV/√Hz
f = 1MHz 8.4 nV/√Hz
f = 1MHz to 100MHz 8.4 nV/√Hz

= 10kΩ 4.0 dBm

R

S

= 50Ω 19.5 dBm

R

S

= ±0.5V 65 90 dB

CM

= ±2V, RL = 100Ω 45 51 dB

O

= ±2V, RL = 100Ω 43 dB

O

R

= 250Ω±2.2 ±2.5 V

L

R

= 100Ω±2.0 ±2.3 V

L

θ

JA

P 75 °C/W
U 75 °C/W

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OPA4650

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ABSOLUTE MAXIMUM RATINGS

Total Supply Voltage Across Device...................................................11V

Internal Power Dissipation ........................... See Thermal Considerations

Differential Input Voltage .................................................................. ±2.7V

Common-Mode Input Voltage Range .................................................. ±V

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

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

Junction Temperature (T

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

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

J

PACKAGE INFORMATION

PRODUCT PACKAGE NUMBER

S

OPA4650U SO-14 Surface Mount 235
OPA4650P 14-Pin Plastic DIP 010

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

PACKAGE DRAWING

(1)

ORDERING INFORMATION

PIN CONFIGURATION

Top View DIP/SO-14

Output 1

–Input 1
+Input 1

+V
+Input 2
–Input 2

Output 2

1
2
3
4

S

5
6
7

14
13
12
11
10

9
8

Output 4
–Input 4
+Input 4
–V
+Input 3
–Input 3
Output 3

PRODUCT PACKAGE TEMPERATURE RANGE

OPA4650U SO-14 Surface Mount –40°C to +85°C
OPA4650P 14-Pin Plastic DIP –40°C to +85°C

ELECTROSTATIC

S

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.

DISCHARGE SENSITIVITY

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OPA4650

TYPICAL PERFORMANCE CURVES

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

COMMON-MODE REJECTION

vs INPUT COMMON-MODE VOLTAGE

100

90

80

70

Common-Mode Rejection (dB)

60

–4 –3 –2 –1 0 1 2 3 4

Common-Mode Voltage (V)

INPUT BIAS CURRENT AND OFFSET VOLTAGE

vs TEMPERATURE

7

6

110

100

90

80

70

, PSR and CMRR (dB)

OL

A

60

50

–50 –25 0 25 50 75 125

2

V

OS

1

26

24

AOL, PSR AND CMRR vs TEMPERATURE

PSR–

Temperature (°C)

SUPPLY CURRENT vs TEMPERATURE

CMRR

PSR+

A

OL

5

Input Bias Current (mA)

4

–50 –25 0 25 50 75 100

Temperature (°C)

70

65

60

Output Current (±mA)

55

–50 –25 0 25 50 75 100

OUTPUT CURRENT vs TEMPERATURE

+

I

O

–

I

O

Temperature (°C)

0

I

B

Offset Voltage (mV)

–1

22

Supply Current (±mA)

I

Q

20

–50 –25 0 25 50 75 100

Temperature (°C)

INPUT VOLTAGE AND CURRENT NOISE

vs FREQUENCY

100

10

Input Current Noise (pA/√Hz)

Input Voltage Noise (nV/√Hz)

1

100 1k 10k 100k 1M

Voltage Noise

Non-inverting and

Inverting Current Noise

Frequency (Hz)

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OPA4650

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