OPA705PA [BB]
Low-Cost, CMOS, Rail-to-Rail, I/O OPERATIONAL AMPLIFIERS; 低成本， CMOS轨到轨输入/输出运算放大器
| 型号： | OPA705PA |
| 厂家： | 
BURR-BROWN CORPORATION |
| 描述： | Low-Cost, CMOS, Rail-to-Rail, I/O OPERATIONAL AMPLIFIERS |
| 文件： | 总12页 (文件大小：280K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
OPA705
OPA2705
OPA4705
O
P
A
7
0
5
O
P
A
7
0
5
O
P
A
7
0
5
®
OPA705
SBOS182A – JUNE 2001
Low-Cost, CMOS, Rail-to-Rail, I/O
OPERATIONAL AMPLIFIERS
FEATURES
DESCRIPTION
● RAIL-TO-RAIL INPUT AND OUTPUT
The OPA705 series low-cost op amps are optimized for appli-
cations 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 OPA705 still offers excellent dynamic performance
(1MHz GBW and 0.6V/µs SR) and unity-gain stability.
● WIDE SUPPLY RANGE:
Single Supply: 4V to 12V
Dual Supplies: ±2 to ±6
● LOW QUIESCENT CURRENT: 160µA
● LIMITED RANGE CMRR: 96dB
● LOW OFFSET: 0.5mV
The OPA705 series is 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.
● HIGH SPEED: 1MHz, 0.6V/µs
● MicroSIZE PACKAGES:
SOT23-5, MSOP-8, TSSOP-14
The single version (OPA705) is available in the MicroSIZE
SOT23-5 and in the standard SO-8 surface-mount packages.
The dual version (OPA2705) is available in the MSOP-8,
SO-8, and DIP-8 packages. The quad OPA4705 is available
in the TSSOP-14 and SO-14 packages. All are specified for
operation from –40°C to +85°C.
● LOW INPUT BIAS CURRENT: 1pA
APPLICATIONS
● AUTOMOTIVE APPLICATIONS:
Audio, Sensor Applications, Security Systems
● PORTABLE EQUIPMENT
● ACTIVE FILTERS
● TRANSDUCER AMPLIFIER
● TEST EQUIPMENT
OPA705
● DATA ACQUISITION
NC
V+
NC
1
2
3
4
8
7
6
5
–In
OPA4705
Out
NC
+In
OPA705
V–
Out A
–In A
+In A
V+
1
2
3
4
5
6
7
14 Out D
13 –In D
12 +In D
11 V–
Out
V–
1
2
3
5
4
V+
SO-8, DIP-8
A
B
D
C
OPA2705
+In
–In
Out A
–In A
+In A
V–
1
2
3
4
8
7
6
5
V+
A
Out B
–In B
+In B
+In B
–In B
Out B
10 +In C
SOT23-5
B
9
8
–In C
Out C
MSOP-8, SO-8, DIP-8
TSSOP-14, SO-14
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(1)
ELECTROSTATIC
DISCHARGE SENSITIVITY
Supply Voltage, V+ to V– ................................................................. 13.2V
Signal Input Terminals, Voltage(2) .....................(V–) –0.3V to (V+) +0.3V
Current(2) .................................................... 10mA
This integrated circuit can be damaged by ESD. Texas Instru-
ments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
Output Short-Circuit(3) .............................................................. Continuous
Operating Temperature ..................................................–55°C to +125°C
Storage Temperature .....................................................–65°C to +150°C
Junction Temperature.................................................................... +150°C
Lead Temperature (soldering, 10s)............................................... +300°C
ESD damage can range from subtle performance degrada-
tion 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.
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.
PACKAGE/ORDERING INFORMATION
MINIMUM
PACKAGE
RECOMMENDED
DRAWING
NUMBER
PACKAGE
MARKING
ORDERING
NUMBER(1)
TRANSPORT
MEDIA
PRODUCT
DESCRIPTION
GAIN
PACKAGE
OPA705NA
Single, GBW = 1MHz
1
"
SOT23-5
331
"
A05
"
OPA705NA/250
OPA705NA/3K
OPA705UA
OPA705UA/2K5
OPA705PA
Tape and Reel
Tape and Reel
Rails
Tape and Reel
Rails
"
OPA705UA
"
"
"
Single, GBW = 1MHz
"
1
"
SO-8
"
182
"
OPA705UA
"
OPA705PA
Single, GBW = 1MHz
1
DIP-8
006
OPA705PA
OPA2705EA
Dual, GBW = 1MHz
1
"
MSOP-8
337
"
B05
"
OPA2705EA/250
OPA2705EA/2K5
OPA2705UA
OPA2705UA/2K5
OPA2705PA
Tape and Reel
Tape and Reel
Rails
Tape and Reel
Rails
"
"
"
OPA2705UA
"
Dual, GBW = 1MHz
"
1
"
SO-8
"
182
"
OPA2705UA
"
OPA2705PA
Dual, GBW = 1MHz
1
DIP-8
006
OPA2705PA
OPA4705EA
Quad, GBW = 1MHz
1
"
1
"
TSSOP-14
357
"
235
"
OPA4705EA
OPA4705EA/250
OPA4705EA/2K5
OPA4705UA
Tape and Reel
Tape and Reel
Rails
"
"
"
SO-14
"
"
OPA4705UA
Quad, GBW = 1MHz
OPA4705UA
"
"
"
OPA4705UA/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 “OPA705NA/3K” will get a single 3000-piece Tape and Reel.
OPA705, 2705, 4705
2
SBOS182A
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 VOUT = VS / 2, unless otherwise noted.
OPA705NA, UA, PA
OPA2705EA, UA, PA
OPA4705EA, UA
PARAMETER
CONDITION
MIN
TYP
MAX
UNITS
OFFSET VOLTAGE
Input Offset Voltage
Drift
vs Power Supply
Over Temperature
Channel Separation, dc
VOS
dVOS /dT
PSRR
VS = ±5V, VCM = 0V
TA = –40°C to +85°C
VS = ±2V to ±6V, VCM = 0V
VS = ±2V to ±6V, VCM = 0V
RL = 20kΩ
±0.5
±4
20
100
1
98
±5
mV
µV/°C
µV/V
µV/V
µV/V
dB
100
f = 1kHz
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Common-Mode Rejection Ratio
over Temperature
VCM
CMRR
(V–) – 0.3
(V+) + 0.3
V
VS = ±5V, (V–) – 0.3V < VCM < (V+) + 0.3V
66
77
74
96
93
dB
dB
dB
dB
VS
VS = ±5V, (V–) – 0.3V < VCM < (V+) – 2V
VS 5V, (V–) < VCM < (V+) – 2V
= ±5V, (V–) < VCM < (V+)
66
over Temperature
= ±
INPUT BIAS CURRENT
Input Bias Current
Input Offset Current
IB
IOS
VS = ±5V, VCM = 0V
VS = ±5V, VCM = 0V
±1
±0.5
±10
±10
pA
pA
INPUT IMPEDANCE
Differential
Common-Mode
4 • 109 || 4
5 • 1012 || 4
Ω || pF
Ω || pF
NOISE
Input Voltage Noise, f = 0.1Hz to 10Hz
Input Voltage Noise Density, f = 1kHz
Current Noise Density, f = 1kHz
VS = ±5V, VCM = 0V
VS = ±5V, VCM = 0V
VS = ±5V, VCM = 0V
6
45
2.5
µVp-p
nV/√Hz
fA/√Hz
en
in
OPEN-LOOP GAIN
Open-Loop Voltage Gain
AOL RL = 100kΩ, (V–)+0.1V < VO < (V+)–0.1V
RL = 20kΩ, (V–)+0.075V < VO < (V+)–0.075V
120
110
106
110
106
dB
dB
dB
dB
dB
100
100
over Temperature
over Temperature
RL =20kΩ, (V–)+0.075V < VO < (V+)–0.075V
RL = 5kΩ, (V–)+0.15V < VO < (V+)–0.15V
RL = 5kΩ, (V–)+0.15V < VO < (V+)–0.15V
OUTPUT
Voltage Output Swing from Rail
RL = 100kΩ, AOL > 80dB
RL = 20kΩ, AOL > 100dB
RL = 5kΩ, AOL > 100dB
|VS – VOUT| < 1V
40
mV
mV
mV
mA
mA
75
150
Output Current
Short-Circuit Current
Capacitive Load Drive
IOUT
ISC
CLOAD
±10
±40
See Typical Performance Curves
FREQUENCY RESPONSE
Gain-Bandwidth Product
Slew Rate
Settling Time, 0.1%
0.01%
CL = 100pF
G = +1
VS = ±5V, G = +1
VS = ±5V, 5V Step, G = +1
VS = ±5V, 5V Step, G = +1
VIN • Gain = VS
GBW
SR
tS
1
0.6
15
20
3
MHz
V/µs
µs
µs
µs
Overload Recovery Time
Total Harmonic Distortion + Noise
THD+N VS = ±5V, VO = 3Vp-p, G = +1, f = 1kHz
0.02
%
POWER SUPPLY
Specified Voltage Range, Single Supply
Specified Voltage Range, Dual Supplies
Operating Voltage Range
Quiescent Current (per amplifier)
over Temperature
VS
VS
4
±2
12
±6
V
V
V
µA
µA
3.6 to 12
160
200
IQ
IO = 0
250
TEMPERATURE RANGE
Specified Range
Operating Range
–40
–55
–65
85
125
150
°C
°C
°C
Storage Range
Thermal Resistance
SOT23-5 Surface-Mount
MSOP-8 Surface-Mount
TSSOP-14 Surface-Mount
SO-8 Surface Mount
SO-14 Surface Mount
DIP-8
θJA
200
150
100
150
100
100
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
OPA705, 2705, 4705
3
SBOS182A
TYPICAL CHARACTERISTICS
At TA = +25°C, VS = ±5V, and RL = 20kΩ, unless otherwise noted.
GAIN AND PHASE vs FREQUENCY
120
CMRR vs FREQUENCY
CMRR Limited Range
120
100
80
120
100
80
60
40
20
0
100
80
60
60
40
40
20
20
CMRR Full Scale
0
0
–20
–40
–60
–20
–40
–60
10
100
1k
10k
100k
1M
10M
1
10
100
1k
10k
100k
1M
Frequency (Hz)
Frequency (Hz)
PSRR vs FREQUENCY
MAXIMUM AMPLITUDE vs FREQUENCY
(V+) – (V–) = 12V
140
120
100
80
7
6
5
4
3
2
1
0
60
40
20
0
1
10
100
1k
10k
100k
1M
100
1k
10k
100k
1M
10M
Frequency (Hz)
Frequency (Hz)
INPUT CURRENT AND VOLTAGE
SPECTRAL NOISE vs FREQUENCY
CHANNEL SEPARATION vs FREQUENCY
160
140
120
100
80
10000
1000
100
10
10000
Current
Noise
1000
100
10
Voltage
Noise
60
40
1
1
20
0
0.1
0.1
0.1
1
10
100
1k
10k
100k
1M
10
100
1k
10k
100k
1M
Frequency (Hz)
Frequency (Hz)
OPA705, 2705, 4705
4
SBOS182A
TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VS = ±5V, and RL = 20kΩ, unless otherwise noted.
COMMON-MODE REJECTION RATIO
OPEN-LOOP GAIN vs TEMPERATURE
vs TEMPERATURE
120
140
130
120
110
100
90
110
Limited Scale
100
90
80
70
Full Scale
60
–80 –60 –40 –20
0
20 40 60 80 100 120 140
–100 –75 –50 –25
0
25 50 75 100 125 150 175
Temperature (°C)
Temperature (°C)
INPUT BIAS (IB) AND OFFSET (IOS
CURRENT vs TEMPERATURE
)
QUIESCENT CURRENT vs TEMPERATURE
250
200
150
100
50
100000
10000
1000
100
10
IB
IOS
1
0.1
0
0.0
–100 –75 –50 –25
0
25 50 75 100 125 150 175
–50 –25
0
25
50
75
100 125 150 175
Temperature (°C)
Temperature (°C)
TOTAL HARMONIC DISTORTION PLUS NOISE
(Load = 5kΩ, BW = 8kHz, 1.0Vrms, G = +1)
PSRR vs TEMPERATURE
120
110
100
90
1.000
0.100
0.010
0.001
80
70
60
–75 –50 –25
0
10 25 50 75 100 110 130 150
1
10
100
1k
10k
100k
Temperature (°C)
Frequency (Hz)
OPA705, 2705, 4705
5
SBOS182A
TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VS = ±5V, and RL = 20kΩ, unless otherwise noted.
INPUT BIAS CURRENT (IB)
vs COMMON-MODE VOLTAGE (VCM
INPUT BIAS CURRENT (IB)
vs COMMON-MODE VOLTAGE (VCM
TEMPERATURE = 125°C
)
)
TEMPERATURE = °25C
15
10
5
20
15
10
5
0
–5
–10
–15
0
–5
–10
–6 –5 –4 –3 –2 –1
0
1
2
3
4
5
6
–6 –5 –4 –3 –2 –1
0
1
2
3
4
5
6
Common-Mode Voltage, VCM (V)
Common-Mode Voltage, VCM (V)
SHORT-CIRCUIT CURRENT
vs SUPPLY VOLTAGE
QUIESCENT CURRENT vs SUPPLY VOLTAGE
200
190
180
170
160
150
140
130
120
60
50
40
30
20
10
0
ISC N (Sinking)
ISC P (Sourcing)
2
4
6
8
10
12
14
2
4
6
8
10
12
14
Supply Voltage (V)
Supply Voltage (V)
SMALL-SIGNAL OVERSHOOT (%)
vs CAPACITIVE LOAD AND GAIN
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT
6
4
90
80
70
60
50
40
30
20
10
0
G = +1
+125°C
+25°C
–55°C
Sourcing
2
G = –1
0
–2
–4
–6
Sinking
–55°C
G = +5
+25°C
+125°C
0
10
20
30
40
50
60
70
10
100
1k
10k
Output Current (±mA)
Load Capacitance Value (pF)
OPA705, 2705, 4705
6
SBOS182A
TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VS = ±5V, and RL = 20kΩ, unless otherwise noted.
SETTLING TIME vs GAIN
100
VOS PRODUCTION DISTRIBUTION
25
20
15
10
5
90
80
70
0.01%
60
50
40
30
0.1%
20
10
0
1
10
100
Non-Inverting Gain (V/V)
Voltage Offset (mV)
SMALL SIGNAL STEP RESPONSE
(G = +1V/V, RL = 20kΩ, CL = 100pF)
VOS DRIFT PRODUCTION DISTRIBUTION
25
20
15
10
5
0
5µs/div
Voltage Offset (µV/°C)
LARGE SIGNAL STEP RESPONSE
(G = +1V/V, RL = 20kΩ, CL = 100pF)
10µs/div
OPA705, 2705, 4705
7
SBOS182A
Power-supply pins should be bypassed with 1000pF ceramic
capacitors in parallel with 1µF tantalum capacitors.
APPLICATIONS INFORMATION
OPA705 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 OPA705 is unity-gain stable and offers 1MHz
bandwidth and 0.6V/µs slew rate.
OPERATING VOLTAGE
OPA705 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 volt-
ages or temperature are shown in the Typical Characteristics.
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 OPA705 in unity-
gain 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.
RAIL-TO-RAIL INPUT
The input common-mode voltage range of the OPA705 series
extends 300mV beyond the supply rails at room temperature.
This is achieved with a complementary input stage—an N-
channel 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 P-
channel 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.
G = +1, VS = ±5V
Input
Output (inverted on scope)
200µs/div
FIGURE 1. Rail-to-Rail Input and Output.
V+
VO
VIN+
VIN–
V–
FIGURE 2. Simplified Schematic.
OPA705, 2705, 4705
8
SBOS182A
INPUT 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 be-
tween 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”).
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 OPA705
features no phase inversion when the inputs extend beyond
supplies if the input current is limited, as seen in Figure 4.
CAPACITIVE LOAD AND STABILITY
The OPA705 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”).
+V
IOVERLOAD
One method of improving capacitive load drive in the unity-
gain 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.
10mA max
VOUT
OPA705
VIN
R
V–
FIGURE 3. Input Current Protection for Voltages Exceeding
the Supply Voltage.
RS
20Ω
OPA705
VOUT
VIN
CL
RL
VS = ±5.0V, VIN = 11Vp-p
FIGURE 5. Series Resistor in Unity-Gain Buffer Configura-
tion Improves Capacitive Load Drive.
APPLICATION CIRCUITS
The OPA705 series op amps are optimized for driving
medium-speed sampling data converters. Figure 6 shows the
OPA2705 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 combi-
nation ideal for automatic test equipment, data acquisition
systems, and other low-power space-limited applications.
20µs/div
FIGURE 4. OPA705—No Phase Inversion with Inputs
Greater than the Power-Supply Voltage.
OPA705, 2705, 4705
9
SBOS182A
NC 48
NC 47
DAC7644
NC 46
NC 45
+V
V
OUTA Sense 44
V–
VOUT
V
OUTA 43
REFL AB Sense 42
REFL AB 41
REFH AB 40
REFH AB Sense 39
OUTB Sense 38
OUTB 37
V
–2.5V
Negative
Reference
Ref
1/2
V
OPA2705
500pF
V
V
V+
Ref
1/2
OPA2705
500pF
V
Positive
Reference
+2.5V
V
VOUT
–V
FIGURE 6. OPA705 as Dual Supply Configuration-Buffered References for the DAC7644.
OPA705, 2705, 4705
10
SBOS182A
PACKAGE OPTION ADDENDUM
www.ti.com
3-Oct-2003
PACKAGING INFORMATION
ORDERABLE DEVICE
STATUS(1)
PACKAGE TYPE
PACKAGE DRAWING
PINS
PACKAGE QTY
OPA2705EA/250
OPA2705EA/2K5
OPA2705PA
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
VSSOP
VSSOP
PDIP
DGK
DGK
P
8
8
250
2500
50
8
OPA2705UA
SOIC
SOIC
TSSOP
TSSOP
SOIC
SOIC
SOP
D
8
100
2500
250
2500
58
OPA2705UA/2K5
OPA4705EA/250
OPA4705EA/2K5
OPA4705UA
D
8
PW
PW
D
14
14
14
14
5
OPA4705UA/2K5
OPA705NA/250
OPA705NA/3K
OPA705PA
D
2500
250
3000
50
DBV
DBV
P
SOP
5
PDIP
8
OPA705UA
SOIC
SOIC
D
8
100
2500
OPA705UA/2K5
D
8
(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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