TEXAS INSTRUMENTS OPA703 Technical data

®

OPA703

O

P

A

70

3

OPA703

O

P

A

7

0

3

CMOS, Rail-to-Rail, I/O

OPERATIONAL AMPLIFIERS

OPA703

OPA2703
OPA4703

OPA704

OPA2704
OPA4704

SBOS180A – MARCH 2001

FEATURES

● RAIL-TO-RAIL INPUT AND OUTPUT

● WIDE SUPPLY RANGE:

Single Supply: 4V to 12V
Dual Supplies:

±2 to ±6

● LOW QUIESCENT CURRENT: 160µA

● FULL-SCALE CMRR: 90dB

● LOW OFFSET: 160µV

● HIGH SPEED:

OPA703: 1MHz, 0.6V/ µs
OPA704: 3MHz, 3V/µs

●

Micro

SIZE PACKAGES:

SOT23-5, MSOP-8, TSSOP-14

● LOW INPUT BIAS CURRENT: 1pA

APPLICATIONS

● AUTOMOTIVE APPLICATIONS:

Audio, Sensor Applications, Security Systems

● PORTABLE EQUIPMENT

● ACTIVE FILTERS

● TRANSDUCER AMPLIFIER

● TEST EQUIPMENT

● DATA ACQUISITION

OPA703

OPA704

Out

V–

+In

1
2
3

SOT23-5

V+

5

–In

4

Out A

–In A
+In A

V–

OPA2703
OPA2704

1

A

2
3
4

MSOP-8, SO-8, DIP-8

DESCRIPTION

The OPA703 and OPA704 series op amps are optimized for
applications requiring rail-to-rail input and output swing.
Single, dual, and quad versions are offered in a variety of
packages. While the quiescent current is less than 200µA per
amplifier, the OPA703 still offers excellent dynamic perfor­mance (1MHz GBW and 0.6V/µs SR) and unity-gain stabil­ity. The OPA704 is optimized for gains of 5 or greater and
provides 3MHz GBW and 3V/µs slew rate.

The OPA703 and OPA704 series are fully specified and
guaranteed over the supply range of ±2V to ±6V. Input
swing extends 300mV beyond the rail and the output swings
to within 40mV of the rail.

The single versions (OPA703 and OPA704) are available in
the MicroSIZE SOT23-5 and in the standard SO-8 surface­mount, as well as the DIP-8 packages. Dual versions
(OPA2703 and OPA2704) are available in the MSOP-8,
SO-8, and DIP-8 packages. The quad OPA4703 and
OPA4704 are available in the TSSOP-14 and SO-14 pack­ages. All are specified for operation from –40°C to +85°C.

OPA703

OPA704

NC

1

–In

2

+In

3

V–

4

SO-8, DIP-8

V+

8

Out B

7

B

–In B

6

+In B

5

NC

8

V+

7

Out

6

Out A

–In A
+In A

V+
+In B
–In B

Out B

1
2
3
4
5
6
7

NC

5

OPA4703
OPA4704

14

AD

BC

TSSOP-14, SO-14

13
12
11
10

9
8

Out D
–In D
+In D
V–
+In C
–In C
Out C

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.

Copyright © 2001, Texas Instruments Incorporated

www.ti.com

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, V+ to V–................................................................. 13.2V

Signal Input Terminals, Voltage

Output Short-Circuit

Operating Temperature ..................................................–55°C to +125°C

Storage Temperature ..................................................... –65°C to +150°C

Junction Temperature .................................................................... +150°C

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

NOTES: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may
degrade device reliability. (2) Input terminals are diode-clamped to the power
supply rails. Input signals that can swing more than 0.3V beyond the supply
rails should be current-limited to 10mA or less. (3) Short-circuit to ground,
one amplifier per package.

(3)

(2)

.....................(V–) –0.3V to (V+) +0.3V

(2)

Current

.............................................................. Continuous

.................................................... 10mA

(1)

ELECTROSTATIC
DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Texas Instru­ments 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.

PACKAGE/ORDERING INFORMATION

MINIMUM PACKAGE

PRODUCT DESCRIPTION GAIN PACKAGE NUMBER MARKING NUMBER

RECOMMENDED DRAWING PACKAGE ORDERING TRANSPORT

OPA703NA Single, GBW = 1MHz 1 SOT23-5 331 A03 OPA703NA/250 Tape and Reel

""""""OPA703NA/3K Tape and Reel

OPA703UA Single, GBW = 1MHz 1 SO-8 182 OPA703UA OPA703UA Rails

""""""OPA703UA/2K5 Tape and Reel

OPA703PA Single, GBW = 1MHz 1 DIP-8 006 OPA703PA OPA703PA Rails
OPA2703EA Dual, GBW = 1MHz 1 MSOP-8 337 B03 OPA2703EA/250 Tape and Reel

""""""OPA2703EA/2K5 Tape and Reel

OPA2703UA Dual, GBW = 1MHz 1 SO-8 182 OPA2703UA OPA2703UA Rails

""""""OPA2703UA/2K5 Tape and Reel

OPA2703PA Dual, GBW = 1MHz 1 DIP-8 006 OPA2703PA OPA2703PA Rails
OPA4703EA Quad, GBW = 1MHz 1 TSSOP-14 357 OPA4703EA OPA4703EA/250 Tape and Reel

""""""OPA4703EA/2K5 Tape and Reel

OPA4703UA Quad, GBW = 1MHz 1 SO-14 235 OPA4703UA OPA4703UA Rails

""""""OPA4703UA/2K5 Tape and Reel

OPA704NA Single, GBW = 5MHz 5 SOT23-5 331 A04 OPA704NA/250 Tape and Reel

""""""OPA704NA/3K Tape and Reel

OPA704UA Single, GBW = 5MHz 5 SO-8 182 OPA704UA OPA704UA Tape and Reel

""""""OPA704UA/2K5 Tape and Reel

OPA704PA Single, GBW = 5MHz 5 DIP-8 006 OPA704PA OPA704PA Rails
OPA2704EA Dual, GBW = 5MHz 5 MSOP-8 337 B04 OPA2703EA/250 Tape and Reel

""""""OPA2703EA/2K5 Tape and Reel

OPA2704UA Dual, GBW = 5MHz 5 SO-8 182 OPA2704UA OPA2704UA Rails

""""""OPA2704UA/2K5 Tape and Reel

OPA2704PA Dual, GBW = 5MHz 5 DIP-8 006 OPA2704PA OPA2704PA Rails
OPA4704EA Quad, GBW = 5MHz 5 TSSOP-14 357 OPA4704EA OPA4704EA/250 Tape and Reel

""""""OPA4704EA/2K5 Tape and Reel

OPA4704UA Quad, GBW = 5MHz 5 SO-14 235 OPA4704UA OPA4704UA Rails

""""""OPA4704UA/2K5 Tape and Reel

NOTE: (1) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /3K indicates 3000 devices per reel). Ordering 3000 pieces
of “OPA703NA/3K” will get a single 3000-piece Tape and Reel.

(1)

MEDIA

2

OPA703, OPA704

SBOS180A

OPA703 ELECTRICAL CHARACTERISTICS: VS = 4V to 12V

Boldface limits apply over the specified temperature range, TA = –40°C to +85°C

At TA = +25°C, RL = 20kΩ connected to VS/2 and V

PARAMETER CONDITION MIN TYP MAX UNITS
OFFSET VOLTAGE

Input Offset Voltage V

Drift dV

vs Power Supply PSRR V

/dT TA = –40°C to +85°C ±4 µV/°C

OS

Over Temperature V

Channel Separation, dc R

f = 1kHz 98 dB

INPUT VOLTAGE RANGE

Common-Mode Voltage Range V
Common-Mode Rejection Ratio CMRR

over Temperature

over Temperature

INPUT BIAS CURRENT

Input Bias Current I
Input Offset Current I

INPUT IMPEDANCE

Differential 4 • 10
Common-Mode 5 • 10

NOISE

Input Voltage Noise, f = 0.1Hz to 10Hz
Input Voltage Noise Density, f = 1kHz e
Current Noise Density, f = 1kHz i

OPEN-LOOP GAIN

Open-Loop Voltage Gain A

over Temperature

over Temperature R

OUTPUT

Voltage Output Swing from Rail R

over Temperature R

over Temperature R

Output Current I
Short-Circuit Current I
Capacitive Load Drive C

OUT

LOAD

FREQUENCY RESPONSE C
Gain-Bandwidth Product GBW G = +1 1 MHz
Slew Rate SR V
Settling Time, 0.1% t

0.01% V
Overload Recovery Time V
Total Harmonic Distortion + Noise THD+N V

POWER SUPPLY

Specified Voltage Range, Single Supply V
Specified Voltage Range, Dual Supplies V
Operating Voltage Range 3.6 to 12 V
Quiescent Current (per amplifier) I

over Temperature 300

TEMPERATURE RANGE

Specified Range –40 85 °C
Operating Range –55 125 °C
Storage Range –65 150 °C
Thermal Resistance

θ

SOT23-5 Surface-Mount 200 °C/W
MSOP-8 Surface-Mount 150 °C/W
TSSOP-14 Surface-Mount 100 °C/W
SO-8 Surface Mount 150 °C/W
SO-14 Surface Mount 100 °C/W
DIP-8 100 °C/W

= VS/2, unless otherwise noted.

OUT

OPA703NA, UA, PA

OPA2703EA, UA, PA

OPA4703EA, UA

OS

CM

B

OS

n
n

OLRL

RL = 20kΩ, (V–)+0.075V < VO < (V+)–0.075V 100 110 dB

RL = 20kΩ, (V–)+0.075V < VO < (V+)–0.075V

R

SC

S

S
S

Q

JA

VS = ±5V, VCM = 0V ±160 ±750 µV

= ±2V to ±6V, VCM = 0V 20 100 µV/V

S

= ±2V to ±6V, VCM = 0V 200 µV/V

S

= 20kΩ 1 µV/V

L

(V–) – 0.3 (V+) + 0.3 V

VS = ±5V, (V–) – 0.3V < VCM < (V+) + 0.3V

VS = ±5V, (V–) < VCM < (V+)

VS = ±5V, (V–) – 0.3V < VCM < (V+) – 2V

VS = ±5V, (V–) < VCM < (V+) – 2V

VS = ±5V, VCM = 0V
VS = ±5V, VCM = 0V

VS = ±5V, VCM = 0V
VS = ±5V, VCM = 0V
VS = ±5V, VCM = 0V

70 90 dB

68 dB

80 96 dB

74 dB

±1 ±10 pA

±0.5 ±10 pA

9

|| 4 Ω || pF

12

|| 4 Ω || pF

6 µVp-p

45 nV/√Hz

2.5 fA/√Hz

= 100kΩ, (V–)+0.1V < VO < (V+)–0.1V 120 dB

96 dB

= 5kΩ, (V–)+0.15V < VO < (V+)–0.15V 100 110 dB

L

= 5kΩ, (V–)+0.15V < VO < (V+)–0.15V 96 dB

L

= 100kΩ, A

L

R

= 20kΩ, A

L

= 20kΩ, AOL > 96dB 75 mV

L

R

= 5kΩ, AOL > 100dB 150 mV

L

= 5kΩ, AOL > 96dB 150 mV

L

|VS – V

> 80dB 40 mV

OL

> 100dB 75 mV

OL

| < 1V ±10 mA

OUT

±40 mA

See Typical Performance Curves

= 100pF

L

= ±5V, G = +1 0.6 V/µs

S

VS = ±5V, 5V Step, G = +1 15 µs

= ±5V, 5V Step, G = +1 20 µs

S

• Gain = V

= ±5V, VO = 3Vp-p, G = +1, f = 1kHz 0.02 %

S

IN

S

3 µs

412V

±2 ±6V

IO = 0 160 200 µA

µA

OPA703, OPA704

SBOS180A

3

OPA704 ELECTRICAL CHARACTERISTICS: VS = 4V to 12V

Boldface limits apply over the specified temperature range, TA = –40°C to +85°C

At TA = +25°C, RL = 20kΩ connected to VS/2 and V

PARAMETER CONDITION MIN TYP MAX UNITS
OFFSET VOLTAGE

Input Offset Voltage V

Drift dV

vs Power Supply PSRR V

/dT TA = –40°C to +85°C ±4 µV/°C

OS

Over Temperature V

Channel Separation, dc R

f = 1kHz 98 dB

INPUT VOLTAGE RANGE

Common-Mode Voltage Range V
Common-Mode Rejection Ratio CMRR

CM

over Temperature

over Temperature

INPUT BIAS CURRENT

Input Bias Current I
Input Offset Current I

INPUT IMPEDANCE

Differential 4 • 10
Common-Mode 5 • 10

NOISE

Input Voltage Noise, f = 0.1Hz to 10Hz
Input Voltage Noise Density, f = 1kHz e
Current Noise Density, f = 1kHz i

OPEN-LOOP GAIN

Open-Loop Voltage Gain A

over Temperature RL = 20kΩ, (V–)+0.075V < VO < (V+)–0.075V 96 dB

over Temperature R

OUTPUT

Voltage Output Swing from Rail R

over Temperature R

over Temperature R

Output Current I
Short-Circuit Current I
Capacitive Load Drive C

OUT

LOAD

FREQUENCY RESPONSE C
Gain-Bandwidth Product GBW G = +5 3 MHz
Slew Rate SR V
Settling Time, 0.1% t

0.01% V
Overload Recovery Time V
Total Harmonic Distortion + Noise THD+N V

POWER SUPPLY

Specified Voltage Range, Single Supply V
Specified Voltage Range, Dual Supplies V
Operating Voltage Range 3.6 to 12 V
Quiescent Current (per amplifier) I

over Temperature 300

TEMPERATURE RANGE

Specified Range –40 85 °C
Operating Range –55 125 °C
Storage Range –65 150 °C
Thermal Resistance

θ

SOT23-5 Surface-Mount 200 °C/W
MSOP-8 Surface-Mount 150 °C/W
TSSOP-14 Surface-Mount 100 °C/W
SO-8 Surface Mount 150 °C/W
SO-14 Surface Mount 100 °C/W
DIP-8 100 °C/W

= VS/ 2, unless otherwise noted.

OUT

OPA704NA, UA, PA

OPA2704EA, UA, PA

OPA4704EA, UA

OS

VS = ±5V, VCM = 0V ±160 ±750 µV

= ±2V to ±6V, VCM = 0V 20 100 µV/V

S

= ±2V to ±6V, VCM = 0V 200 µV/V

S

= 20kΩ 1 µV/V

L

(V–) – 0.3 (V+) + 0.3 V

VS = ±5V, (V–) – 0.3V < VCM < (V+) + 0.3V

VS = ±5V, (V–) < VCM < (V+)

VS = ±5V, (V–) – 0.3V < VCM < (V+) – 2V

VS = ±5V, (V–) < VCM < (V+) – 2V

B

OS

VS = ±5V, VCM = 0V
VS = ±5V, VCM = 0V

VS = ±5V, VCM = 0V

n
n

OLRL

RL = 20kΩ, (V–)+0.075V < VO < (V+)–0.075V 100 110 dB

R

L

L

SC

S

S

S
S

Q

JA

VS = ±5V, VCM = 0V
VS = ±5V, VCM = 0V

= 100kΩ, (V–)+0.1V < VO < (V+)–0.1V 120 dB

= 5kΩ, (V–)+0.15V < VO < (V+)–0.15V 100 110 dB

= 5kΩ, (V–)+0.15V < VO < (V+)–0.15V 96 dB

= 100kΩ, A

L

R

= 20kΩ, A

L

= 20kΩ, AOL > 96dB 75 mV

L

R

= 5kΩ, AOL > 100dB 150 mV

L

= 5kΩ, AOL > 96dB 150 mV

L

|VS – V

= ±5V, G = +5 3 V/µs

S

VS = ±5V, 5V Step, G = +5 18 µs

= ±5V, 5V Step, G = +5 21 µs

S

• Gain = V

= ±5V, VO = 3Vp-p, G = +5, f = 1kHz 0.025 %

IN

> 80dB 40 mV

OL

> 100dB 75 mV

OL

| < 1V ±10 mA

OUT

= 100pF

L

S

IO = 0 160 200 µA

70 90 dB

68 dB

80 96 dB

74 dB

±1 ±10 pA

±0.5 ±10 pA

9

|| 4 Ω || pF

12

|| 4 Ω || pF

6 µVp-p

45 nV/√Hz

2.5 fA/√Hz

±40 mA

See Typical Performance Curves

0.6 µs

412V

±2 ±6V

µA

4

OPA703, OPA704

SBOS180A

TYPICAL CHARACTERISTICS

PSRR vs FREQUENCY

1

PSRR (dB)

Frequency (Hz)

10 1k100 10k 100k 1M

140

120

100

80

60

40

20

0

At TA = +25°C, VS = ±5V, and RL = 20kΩ, unless otherwise noted.

120
100

80
60
40
20

Gain (dB)

0

–20
–40
–60

10

120

100

80

60

OPA703 GAIN AND PHASE vs FREQUENCY

100 10k1k 100k 1M 10M

Frequency (Hz)

CMRR vs FREQUENCY

CMRR Limited Range

CMRR Full Scale

120
100
80
60
40
20
0

–20
–40
–60

120
100

80
60
40

Gain (dB)

Phase (°)

20

0

–20
–40

OPA704 GAIN AND PHASE vs FREQUENCY

100 10k1k 100k 1M 10M

10

Frequency (Hz)

120
100
80
60
40
20
0

–20
–40

Phase (°)

CMRR (dB)

40

20

0

10 1k100 10k 100k 1M

1

Frequency (Hz)

7

6

5

4

3

Amplitude (V)

2

1

0

100

MAXIMUM AMPLITUDE vs FREQUENCY

(V+) – (V–) = 12V

OPA704

OPA703

1k 10k 100k 1M 10M

Frequency (Hz)

160
140
120
100

80
60
40

Channel Separation (dB)

20

0

CHANNEL SEPARATION vs FREQUENCY

10

100 1k 10k 100k 1M

Frequency (Hz)

OPA703, OPA704

SBOS180A

5

TYPICAL CHARACTERISTICS (Cont.)

At TA = +25°C, VS = ±5V, and RL = 20kΩ, unless otherwise noted.

10000

1000

100

10

Spectral Noise nV/√Hz

1

Input Current and Voltage

0.1

0.1

140

130

120

(dB)

OL

A

110

100

SPECTRAL NOISE vs FREQUENCY

OPEN-LOOP GAIN vs TEMPERATURE

INPUT CURRENT AND VOLTAGE

Current

Voltage

Noise

101 100 1k 10k 100k 1M

Frequency (Hz)

Noise

10000

1000

100

10

1

0.1

Noise fA/√Hz

Output Current Spectral

Bias Current (pA)

120

110

100

90

CMRR (dB)

80

70

60

100000

10000

1000

100

10

0.1

COMMON-MODE REJECTION RATIO

vs TEMPERATURE

Limited Scale

Full Scale

–80

1

–40–60 –20 200 40 60 80 100 120 140

Temperature (°C)

INPUT BIAS (IB) AND OFFSET (IOS)

CURRENT vs TEMPERATURE

I

B

I

OS

90

–100

250

200

150

(µA)

Q

I

100

50

0

–100

–50–75 –25 500 25 75 100 125 150 175

Temperature (°C)

QUIESCENT CURRENT vs TEMPERATURE

–75 –50 –25 50250 75 100 125 150 175

Temperature (°C)

0.0
–50

120

110

100

90

PSRR (dB)

80

70

60

–75

–25 0 5025 75

Temperature (°C)

PSRR vs TEMPERATURE

–25–50 0 5010 25 75 100 110 130 150

Temperature (°C)

100 125 175150

6

OPA703, OPA704

SBOS180A

TYPICAL CHARACTERISTICS (Cont.)

INPUT BIAS CURRENT (IB)

vs COMMON-MODE VOLTAGE (V

CM

)

TEMPERATURE = °25C

–6

Input Bias Current (pA)

Common-Mode Voltage, VCM (V)

–5 –4 –3 –10–2123456

15

10

5

0

–5

–10

–15

OUTPUT VOLTAGE SWING vs OUTPUT CURRENT

0

Output Voltage (V)

Output Current (±mA)

10 20 4030 50 60 70

6

4

2

0

–2

–4

–6

Sourcing

Sinking

+125°C

+25°C

–55°C

+125°C

+25°C

–55°C

At TA = +25°C, VS = ±5V, and RL = 20kΩ, unless otherwise noted.

TOTAL HARMONIC DISTORTION PLUS NOISE

1.000

(Load = 5kΩ, BW = 8kHz, 1.0Vrms)

0.100

THD (%)

0.010

0.001
1

15

10

5

0

–5

Input Bias Current (nA)

–10

–15

–5 –4 –3 –10–2123456

–6

G = +5

OPA704

OPA703

G = +1

10 1k100 10k 100k

Frequency (Hz)

INPUT BIAS CURRENT (IB)

vs COMMON-MODE VOLTAGE (V

TEMPERATURE = 125°C

Common-Mode Voltage, VCM (V)

)

CM

200
190
180
170
160
150
140

Quiescent Current (µA)

130
120

QUIESCENT CURRENT vs SUPPLY VOLTAGE

2

486101214

Supply Voltage (V)

60

50

40

30

20

Short-Circuit Current (mA)

10

0

2

OPA703, OPA704

SBOS180A

SHORT-CIRCUIT CURRENT

vs SUPPLY VOLTAGE

N (Sinking)

I

SC

ISC P (Sourcing)

486101214

Supply Voltage (V)

7

TYPICAL CHARACTERISTICS (Cont.)

At TA = +25°C, VS = ±5V, and RL = 20kΩ, unless otherwise noted.

90
80
70
60
50
40

Overshoot (%)

30
20
10

0

10

100

90
80
70
60
50
40

Settling Time (µs)

30
20
10

1

OPA703 SMALL-SIGNAL OVERSHOOT (%)

vs CAPACITIVE LOAD AND GAIN

G = +1

G = –1

G = +5

100 1k 10k

Load Capacitance Value (pF)

OPA703 SETTLING TIME vs GAIN

0.01%

0.1%

10 100

Non-Inverting Gain (V/V)

90
80
70
60
50
40

Overshoot (%)

30
20
10

0

10

50
45
40
35
30
25

Settling Time (µs)

20
15
10

1

OPA704 SMALL-SIGNAL OVERSHOOT (%)

vs CAPACITIVE LOAD

G = +5

100 1k 10k
Capacitance Load (pF)

OPA704 SETTLING TIME vs GAIN

0.01%

0.10%

10 100

Non-Inverting Gain (V/V)

Frequency (%)

8

25

20

15

10

5

0

VOS PRODUCTION DISTRIBUTION

≤ 0.60

≤ 0.45

≤ 0.30

≤ 0.15

< 0.00

< 0.15

Voltage Offset (µV)

< 0.30

< 0.45

< 0.60

< 0.75

25

20

15

10

Frequency (%)

5

0

VOS DRIFT PRODUCTION DISTRIBUTION

≤ 6

≤ 9

≤ 3

< 0

< 6

≤ 30

≤ 27

≤ 24

≤ 18

≤ 12

≤ 21

≤ 15

Voltage Offset (µV/°C)

< 3

< 9

< 12

< 15

< 18

< 21

< 24

< 27

< 30

> 30

OPA703, OPA704

SBOS180A

TYPICAL CHARACTERISTICS (Cont.)

OPA704 SMALL SIGNAL STEP RESPONSE

(G = +5V/V, C

F

= 3pF, RF = 100kΩ,

C

L

= 100pF, RL = 20kΩ,)

5µs/div

50mV/div

OPA704 LARGE SIGNAL STEP RESPONSE

(G = +5V/V, R

L

= 20kΩ, CF = 3pF, CL = 100pF)

2µs/div

1V/div

At TA = +25°C, VS = ±5V, and RL = 20kΩ, unless otherwise noted.

OPA703 SMALL SIGNAL STEP RESPONSE

(G = +1V/V, R

50mV/div

OPA703 LARGE SIGNAL STEP RESPONSE

(G = +1V/V, R

= 20kΩ, CL = 100pF)

L

5µs/div

= 20kΩ, CL = 100pF)

L

1V/div

10µs/div

OPA703, OPA704

SBOS180A

9

APPLICATIONS INFORMATION

OPA703 and OPA704 series op amps can operate on 160µA
quiescent current from a single (or split) supply in the range
of 4V to 12V (±2V to ±6V), making them highly versatile
and easy to use. The OPA703 is unity-gain stable and offers
1MHz bandwidth and 0.6V/µs slew rate. The OPA704 is
optimized for gains of 5 or greater with a 3MHz bandwidth
and 3V/µs slew rate.

Rail-to-rail input and output swing helps maintain dynamic
range, especially in low supply applications. Figure 1 shows
the input and output waveforms for the OPA703 in unity­gain configuration. Operation is from a ±5V supply with a
100kΩ load connected to VS/2. The input is a 10Vp-p
sinusoid. Output voltage is approximately 10Vp-p.

Input

2.0V/div

Output (inverted on scope)

200µs/div

G = +1, VS = ±5V

Power-supply pins should be bypassed with 1000pF ceramic
capacitors in parallel with 1µF tantalum capacitors.

OPERATING VOLTAGE

OPA703 and OPA704 series op amps are fully specified and
guaranteed from +4V to +12V over a temperature range of
–40ºC to +85ºC. Parameters that vary significantly with
operating voltages or temperature are shown in the Typical
Performance Curves.

RAIL-TO-RAIL INPUT

The input common-mode voltage range of the OPA703 series
extends 300mV beyond the supply rails at room temperature.
This is achieved with a complementary input stage—an N­channel input differential pair in parallel with a P-channel
differential pair, as shown in Figure 2. The N-channel pair is
active for input voltages close to the positive rail, typically
(V+) – 2.0V to 300mV above the positive supply, while the P­channel pair is on for inputs from 300mV below the negative
supply to approximately (V+) – 1.5V. There is a small
transition region, typically (V+) – 2.0V to (V+) – 1.5V, in
which both pairs are on. This 500mV transition region can
vary ±100mV with process variation. Thus, the transition
region (both stages on) can range from (V+) – 2.1V to (V+)
– 1.4V on the low end, up to (V+) – 1.9V to (V+) – 1.6V on
the high end. Within the 500mV transition region PSRR,
CMRR, offset voltage, and offset drift, and THD may vary
compared to operation outside this region.

FIGURE 1. Rail-to-Rail Input and Output.

V+

VIN+

V–

VIN–

V

O

FIGURE 2. Simplified Schematic.

10

OPA703, OPA704

SBOS180A

INPUT VOLTAGE

R

S

20Ω

OPA703

C

L

R

L

V

IN

V

OUT

Device inputs are protected by ESD diodes that will conduct
if the input voltages exceed the power supplies by more than
approximately 300mV. Momentary voltages greater than
300mV beyond the power supply can be tolerated if the
current is limited to 10mA. This is easily accomplished with
an input resistor, as shown in Figure 3. Many input signals
are inherently current-limited to less than 10mA; therefore,
a limiting resistor is not always required. The OPA703
features no phase inversion when the inputs extend beyond
supplies if the input current is limited, as seen in Figure 4.

+V

I

OVERLOAD

10mA max

V

IN

R

OPA703

V–

V

OUT

FIGURE 3. Input Current Protection for Voltages Exceeding

the Supply Voltage.

CAPACITIVE LOAD AND STABILITY

The OPA703 and OPA704 series op amps can drive up to
1000pF pure capacitive load. Increasing the gain enhances
the amplifier’s ability to drive greater capacitive loads (see
the typical performance curve “Small Signal Overshoot vs
Capacitive Load”).

One method of improving capacitive load drive in the unity­gain configuration is to insert a 10Ω to 20Ω resistor inside
the feedback loop, as shown in Figure 5. This reduces
ringing with large capacitive loads while maintaining DC

accuracy.

FIGURE 5. Series Resistor in Unity-Gain Buffer Configura-

tion Improves Capacitive Load Drive.

VS = ±5.0V, VIN = 11Vp-p

2.0V/div

20µs/div

FIGURE 4. OPA703—No Phase Inversion with Inputs

Greater than the Power-Supply Voltage.

RAIL-TO-RAIL OUTPUT

A class AB output stage with common-source transistors is
used to achieve rail-to-rail output. This output stage is
capable of driving 1kΩ loads connected to any point be­tween V+ and ground. For light resistive loads (> 100kΩ),
the output voltage can swing to 40mV from the supply rail.
With moderate resistive loads (20kΩ), the output can swing
to within 75mV from the supply rails while maintaining high
open-loop gain (see the typical performance curve “Output
Voltage Swing vs Output Current”).

APPLICATION CIRCUITS

Figure 6 shows a G = 5 non-inverting amplifier implemented
with the OPA703 and OPA704 op amps. It demonstrates the
increased speed characteristics (bandwidth, slew rate and
settling time) that can be achieved with the OPA704 family
when used in gains of five or greater. Some optimization of
feedback capacitor value may be required to achieve best
dynamic response. Circuits with closed-loop gains of less
than five should use the OPA703 family for good stability
and capacitive load drive. The OPA703 can be used in gains
greater than five, but will not provide the increased speed
benefits of the OPA704 family.

The OPA703 series op amps are optimized for driving
medium-speed sampling data converters. The OPA703 op
amps buffer the converter’s input capacitance and resulting
charge injection while providing signal gain.

Figure 7 shows the OPA2703 in a dual-supply buffered
reference configuration for the DAC7644. The DAC7644 is
a 16-bit, low-power, quad-voltage output converter. Small
size makes the combination ideal for automatic test equip­ment, data acquisition systems, and other low-power space­limited applications.

OPA703, OPA704

SBOS180A

11

3pF

5kΩ 20kΩ

OPA703

V

IN

Demonstrates speed improvement that
can be achieved with OPA704 family
in applications with G ≥ 5.

G = 5

2V/div

5kΩ 20kΩ

V

IN

LARGE-SIGNAL RESPONSE

OPA703

OPA704

5µs/div

OPA704

G = 5

FIGURE 6. OPA704 Provides higher Speed in G ≥ 5.

48

NC

47

DAC7644

V

V

REF

V

REF

V

NC
NC
NC

A Sense

OUT

V

OUT

L AB Sense

V

L AB

REF

V

H AB

REF

H AB Sense

B Sense

OUT

V

OUT

46
45
44
43

A

42
41
40
39
38
37

B

+V

–2.5V

V–

Ref

Negative
Reference

V

OUT

1/2

OPA2703

500pF

V+

500pF

V

OUT

1/2

OPA2703

+2.5V

Ref

Positive
Reference

–V

FIGURE 7. OPA703 as Dual Supply Configuration-Buffered References for the DAC7644.

12

OPA703, OPA704

SBOS180A

PACKAGE OPTION ADDENDUM

www.ti.com

11-Nov-2003

PACKAGING INFORMATION

ORDERABLE DEVICE STATUS(1) PACKAGE TYPE PACKAGE DRAWING PINS PACKAGE QTY

OPA2703EA/250 ACTIVE VSSOP DGK 8 250

OPA2703EA/2K5 ACTIVE VSSOP DGK 8 2500

OPA2703PA ACTIVE PDIP P 8 50

OPA2703UA ACTIVE SOIC D 8 100
OPA2703UA/2K5 ACTIVE SOIC D 8 2500
OPA2704EA/250 ACTIVE VSSOP DGK 8 250
OPA2704EA/2K5 ACTIVE VSSOP DGK 8 2500

OPA2704PA ACTIVE PDIP P 8 50

OPA2704UA ACTIVE SOIC D 8 100
OPA2704UA/2K5 ACTIVE SOIC D 8 2500
OPA4703EA/250 ACTIVE TSSOP PW 14 250
OPA4703EA/2K5 ACTIVE TSSOP PW 14 2500

OPA4703UA ACTIVE SOIC D 14 58
OPA4703UA/2K5 ACTIVE SOIC D 14 2500
OPA4704EA/250 ACTIVE TSSOP PW 14 250
OPA4704EA/2K5 ACTIVE TSSOP PW 14 2500

OPA4704UA ACTIVE SOIC D 14 58
OPA4704UA/2K5 ACTIVE SOIC D 14 2500

OPA703NA/250 ACTIVE SOP DBV 5 250

OPA703NA/3K ACTIVE SOP DBV 5 3000

OPA703PA ACTIVE PDIP P 8 50

OPA703UA ACTIVE SOIC D 8 100
OPA703UA/2K5 ACTIVE SOIC D 8 2500
OPA704NA/250 ACTIVE SOP DBV 5 250

OPA704NA/3K ACTIVE SOP DBV 5 3000

OPA704PA ACTIVE PDIP P 8 50

OPA704UA ACTIVE SOIC D 8 100
OPA704UA/2K5 ACTIVE SOIC D 8 2500

(1) The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in

a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.

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