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.
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.
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
MINIMUMPACKAGE
PRODUCTDESCRIPTIONGAINPACKAGENUMBERMARKINGNUMBER
RECOMMENDEDDRAWINGPACKAGEORDERINGTRANSPORT
OPA703NASingle, GBW = 1MHz1SOT23-5331A03OPA703NA/250Tape 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
PARAMETERCONDITIONMINTYPMAXUNITS
OFFSET VOLTAGE
Input Offset VoltageV
DriftdV
vs Power SupplyPSRR V
/dT TA = –40°C to +85°C±4µV/°C
OS
Over Temperature V
Channel Separation, dcR
f = 1kHz98dB
INPUT VOLTAGE RANGE
Common-Mode Voltage RangeV
Common-Mode Rejection RatioCMRR
over Temperature
over Temperature
INPUT BIAS CURRENT
Input Bias CurrentI
Input Offset CurrentI
INPUT IMPEDANCE
Differential4 • 10
Common-Mode5 • 10
NOISE
Input Voltage Noise, f = 0.1Hz to 10Hz
Input Voltage Noise Density, f = 1kHze
Current Noise Density, f = 1kHzi
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
10010k1k100k1M10M
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
10010k1k100k1M10M
10
Frequency (Hz)
120
100
80
60
40
20
0
–20
–40
Phase (°)
CMRR (dB)
40
20
0
101k10010k100k1M
1
Frequency (Hz)
7
6
5
4
3
Amplitude (V)
2
1
0
100
MAXIMUM AMPLITUDE vs FREQUENCY
(V+) – (V–) = 12V
OPA704
OPA703
1k10k100k1M10M
Frequency (Hz)
160
140
120
100
80
60
40
Channel Separation (dB)
20
0
CHANNEL SEPARATION vs FREQUENCY
10
1001k10k100k1M
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
1011001k10k100k1M
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
–40–60–2020040 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
–50–75–25500 2575 100 125 150 175
Temperature (°C)
QUIESCENT CURRENT vs TEMPERATURE
–75 –50 –255025075 100 125 150 175
Temperature (°C)
0.0
–50
120
110
100
90
PSRR (dB)
80
70
60
–75
–250502575
Temperature (°C)
PSRR vs TEMPERATURE
–25–5005010 2575 100 110 130 150
Temperature (°C)
100 125175150
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)
10204030506070
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
101k10010k100k
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
1001k10k
Load Capacitance Value (pF)
OPA703 SETTLING TIME vs GAIN
0.01%
0.1%
10100
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
1001k10k
Capacitance Load (pF)
OPA704 SETTLING TIME vs GAIN
0.01%
0.10%
10100
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
5kΩ20kΩ
OPA703
V
IN
Demonstrates speed improvement that
can be achieved with OPA704 family
in applications with G ≥ 5.
G = 5
2V/div
5kΩ20kΩ
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.
(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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