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OPA4353EA [TI]

High-Speed, Single-Supply, Rail-to-Rail OPERATIONAL AMPLIFIERS; 高速，单电源，轨至轨运算放大器
OPA4353EA
型号： OPA4353EA
厂家： TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述：

High-Speed, Single-Supply, Rail-to-Rail OPERATIONAL AMPLIFIERS
高速，单电源，轨至轨运算放大器

运算放大器
文件： 总13页 (文件大小：221K)
中文：  中文翻译
下载：  下载PDF数据表文档文件
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®
OPA2353  
OPA353  
OPA2353  
OPA4353  
OPA4353  
O
P
A4353  
For most current data sheet and other product  
information, visit www.burr-brown.com  
High-Speed, Single-Supply, Rail-to-Rail  
OPERATIONAL AMPLIFIERS  
™
MicroAmplifier Series  
APPLICATIONS  
FEATURES  
● CELL PHONE PA CONTROL LOOPS  
● DRIVING A/D CONVERTERS  
● VIDEO PROCESSING  
● DATA ACQUISITION  
● PROCESS CONTROL  
● AUDIO PROCESSING  
● COMMUNICATIONS  
● RAIL-TO-RAIL INPUT  
● RAIL-TO-RAIL OUTPUT (within 10mV)  
● WIDE BANDWIDTH: 44MHz  
● HIGH SLEW RATE: 22V/µs  
● LOW NOISE: 5nV/√Hz  
● LOW THD+NOISE: 0.0006%  
● UNITY-GAIN STABLE  
● ACTIVE FILTERS  
● MicroSIZE PACKAGES  
● TEST EQUIPMENT  
● SINGLE, DUAL, AND QUAD  
DESCRIPTION  
extends 300mV beyond the supply rails. Output voltage  
swing is to within 10mV of the supply rails with a 10kΩ  
load. Dual and quad designs feature completely indepen-  
dent circuitry for lowest crosstalk and freedom from  
interaction.  
OPA353 series rail-to-rail CMOS operational amplifi-  
ers are designed for low cost, miniature applications.  
They are optimized for low voltage, single-supply op-  
eration. Rail-to-rail input/output, low noise (5nV/√Hz),  
and high speed operation (44MHz, 22V/µs) make them  
ideal for driving sampling analog-to-digital converters.  
They are also well suited for cell phone PA control  
loops and video processing (75Ω drive capability) as  
well as audio and general purpose applications. Single,  
dual, and quad versions have identical specifications  
for design flexibility.  
The single (OPA353) packages are the tiny 5-lead SOT-  
23-5 surface mount and SO-8 surface mount. The dual  
(OPA2353) comes in the miniature MSOP-8 surface  
mount and SO-8 surface mount. The quad (OPA4353)  
packages are the space-saving SSOP-16 surface mount  
and SO-14 surface mount. All are specified from –40°C  
to +85°C and operate from –55°C to +125°C.  
The OPA353 series operates on a single supply as low as  
2.5V with an input common-mode voltage range that  
OPA4353  
SPICE Model available at www.burr-brown.com  
OPA353  
Out A  
–In A  
+In A  
+V  
1
2
3
4
5
6
7
8
16 Out D  
15 –In D  
14 +In D  
13 –V  
NC  
NC  
–In  
+In  
V–  
1
2
3
4
8
7
6
5
A
B
D
C
V+  
Output  
NC  
OPA2353  
+In B  
–In B  
Out B  
NC  
12 +In C  
11 –In C  
10 Out C  
OPA353  
Out A  
1
2
3
4
8
7
6
5
V+  
A
SO-8  
–In A  
+In A  
V–  
Out B  
–In B  
+In B  
Out  
V–  
1
2
3
5
4
V+  
B
9
NC  
+In  
–In  
SSOP-16  
(SO-14 package not shown)  
SO-8, MSOP-8  
SOT-23-5  
International Airport Industrial Park  
•
Mailing Address: PO Box 11400, Tucson, AZ 85734  
•
Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706  
• Tel: (520) 746-1111  
Twx: 910-952-1111 Internet: http://www.burr-brown.com/  
•
•
Cable: BBRCORP Telex: 066-6491  
•
•
FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132  
•
© 1998 Burr-Brown Corporation  
PDS-1479B  
Printed in U.S.A. March, 1999  
SBOS103  
SPECIFICATIONS: VS = 2.7V to 5.5V  
At TA = +25°C, RL = 1kΩ connected to VS/2 and VOUT = VS /2, unless otherwise noted.  
Boldface limits apply over the specified temperature range, TA = –40°C to +85°C. VS = 5V.  
OPA353NA, UA  
OPA2353EA, UA  
OPA4353EA, UA  
PARAMETER  
CONDITION  
MIN  
TYP(1)  
MAX  
UNITS  
OFFSET VOLTAGE  
Input Offset Voltage  
TA = –40°C to +85°C  
VOS  
VS = 5V  
±3  
±8  
±10  
mV  
mV  
vs Temperature  
vs Power Supply Rejection Ratio  
TA = –40°C to +85°C  
TA = –40°C to +85°C  
VS = 2.7V to 5.5V, VCM = 0V  
VS = 2.7V to 5.5V, VCM = 0V  
dc  
±5  
40  
µV/°C  
µV/V  
µV/V  
µV/V  
PSRR  
150  
175  
Channel Separation (dual, quad)  
0.15  
INPUT BIAS CURRENT  
Input Bias Current  
IB  
±0.5  
See Typical Curve  
±0.5  
±10  
±10  
pA  
pA  
T
A = –40°C to +85°C  
Input Offset Current  
IOS  
NOISE  
Input Voltage Noise, f = 100Hz to 400kHz  
Input Voltage Noise Density, f = 10kHz  
f = 100kHz  
4
7
5
4
µVrms  
nV/√Hz  
nV/√Hz  
fA/√Hz  
en  
in  
Current Noise Density, f = 10kHz  
INPUT VOLTAGE RANGE  
Common-Mode Voltage Range  
Common-Mode Rejection Ratio  
VCM  
CMRR  
–0.1  
76  
60  
(V+) + 0.1  
V
–0.1V < VCM < (V+) – 2.4V  
VS = 5V, –0.1V < VCM < 5.1V  
VS = 5V, –0.1V < VCM < 5.1V  
86  
74  
dB  
dB  
dB  
TA = –40°C to +85°C  
58  
INPUT IMPEDANCE  
Differential  
Common-Mode  
1013 || 2.5  
1013 || 6.5  
Ω || pF  
Ω || pF  
OPEN-LOOP GAIN  
Open-Loop Voltage Gain  
TA = –40°C to +85°C  
AOL  
RL = 10kΩ, 50mV < VO < (V+) – 50mV  
RL = 10kΩ, 50mV < VO < (V+) – 50mV  
RL = 1kΩ, 200mV < VO < (V+) – 200mV  
RL = 1kΩ, 200mV < VO < (V+) – 200mV  
100  
100  
100  
100  
122  
120  
dB  
dB  
dB  
dB  
TA = –40°C to +85°C  
FREQUENCY RESPONSE  
Gain-Bandwidth Product  
Slew Rate  
Settling Time, 0.1%  
0.01%  
CL = 100pF  
G = 1  
G = 1  
G = ±1, 2V Step  
G = ±1, 2V Step  
GBW  
SR  
44  
22  
0.22  
0.5  
MHz  
V/µs  
µs  
µs  
Overload Recovery Time  
Total Harmonic Distortion + Noise  
Differential Gain Error  
Differential Phase Error  
VIN • G = VS  
0.1  
µs  
%
%
deg  
THD+N  
VOUT  
RL = 600Ω, VO = 2.5Vp-p(2), G = 1, f = 1kHz  
G = 2, RL = 600Ω, VO = 1.4V(3)  
G = 2, RL = 600Ω, VO = 1.4V(3)  
0.0006  
0.17  
0.17  
OUTPUT  
Voltage Output Swing from Rail(4)  
TA = –40°C to +85°C  
RL = 10kΩ, AOL ≥ 100dB  
RL = 10kΩ, AOL ≥ 100dB  
RL = 1kΩ, AOL ≥ 100dB  
RL = 1kΩ, AOL ≥ 100dB  
10  
25  
50  
50  
200  
200  
mV  
mV  
mV  
mV  
mA  
mA  
TA = –40°C to +85°C  
Output Current  
Short-Circuit Current  
Capacitive Load Drive  
IOUT  
ISC  
CLOAD  
±40(5)  
±80  
See Typical Curve  
POWER SUPPLY  
Operating Voltage Range  
Minimum Operating Voltage  
Quiescent Current (per amplifier)  
TA = –40°C to +85°C  
VS  
IQ  
TA = –40°C to +85°C  
2.7  
5.5  
V
V
mA  
mA  
2.5  
5.2  
IO = 0  
IO = 0  
8
9
TEMPERATURE RANGE  
Specified Range  
Operating Range  
–40  
–55  
–55  
+85  
+125  
+125  
°C  
°C  
°C  
Storage Range  
Thermal Resistance  
SOT-23-5  
MSOP-8 Surface Mount  
SO-8 Surface Mount  
SSOP-16 Surface Mount  
SO-14 Surface Mount  
θJA  
200  
150  
150  
100  
100  
°C/W  
°C/W  
°C/W  
°C/W  
°C/W  
NOTES: (1) VS = +5V. (2) VOUT = 0.25V to 2.75V. (3) NTSC signal generator used. See Figure 6 for test circuit. (4) Output voltage swings are measured between  
the output and power supply rails. (5) See typical performance curve, “Output Voltage Swing vs Output Swing.”  
®
2
OPA353, 2353, 4353  
PIN CONFIGURATION  
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.  
Top View  
SO-14  
OPA4353  
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–  
A
B
D
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.  
+In B  
–In B  
Out B  
10 +In C  
9
8
–In C  
Out C  
ABSOLUTE MAXIMUM RATINGS(1)  
Supply Voltage ................................................................................... 5.5V  
Signal Input Terminals, Voltage(2) .................. (V–) – 0.3V to (V+) + 0.3V  
Current(2) .................................................... 10mA  
Output Short-Circuit(3) .............................................................. Continuous  
Operating Temperature ..................................................–55°C to +125°C  
Storage Temperature .....................................................–55°C to +125°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 de-  
grade 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  
PACKAGE  
DRAWING  
NUMBER(1)  
SPECIFIED  
TEMPERATURE  
RANGE  
PACKAGE  
MARKING  
ORDERING  
NUMBER(2)  
TRANSPORT  
MEDIA  
PRODUCT  
PACKAGE  
Single  
OPA353NA  
5-Lead SOT-23-5  
331  
"
182  
"
–40°C to +85°C  
D53  
OPA353NA/250  
OPA353NA/3K  
OPA353UA  
Tape and Reel  
Tape and Reel  
Rails  
"
"
"
"
OPA353UA  
SO-8 Surface Mount  
–40°C to +85°C  
OPA353UA  
"
"
"
"
OPA353UA/2K5  
Tape and Reel  
Dual  
OPA2353EA  
MSOP-8 Surface Mount  
337  
"
182  
"
–40°C to +85°C  
E53  
"
OPA2353UA  
OPA2353EA/250  
OPA2353EA/2K5  
OPA2353UA  
Tape and Reel  
Tape and Reel  
Rails  
"
"
"
OPA2353UA  
SO-8 Surface Mount  
–40°C to +85°C  
"
"
"
"
OPA2353UA/2K5  
Tape and Reel  
Quad  
OPA4353EA  
SSOP-16 Surface Mount  
322  
"
235  
"
–40°C to +85°C  
OPA4353EA  
OPA4353EA/250  
OPA4353EA/2K5  
OPA4353UA  
Tape and Reel  
Tape and Reel  
Rails  
"
"
"
"
OPA4353UA  
SO-14 Surface Mount  
–40°C to +85°C  
OPA4353UA  
"
"
"
"
OPA4353UA/2K5  
Tape and Reel  
NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) Models with a slash (/) are  
available only in Tape and Reel in the quantities indicated (e.g., /2K5 indicates 2500 devices per reel). Ordering 2500 pieces of “OPA2353EA/2K5” will get a single  
2500-piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book.  
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.  
®
3
OPA353, 2353, 4353  
TYPICAL PERFORMANCE CURVES  
At TA = +25°C, VS = +5V, and RL = 1kΩ connected to VS/2, unless otherwise noted.  
POWER SUPPLY AND COMMON-MODE  
REJECTION RATIO vs FREQUENCY  
OPEN-LOOP GAIN/PHASE vs FREQUENCY  
160  
140  
120  
100  
80  
0
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
PSRR  
–45  
–90  
–135  
–180  
CMRR  
(VS = +5V  
φ
VCM = –0.1V to 5.1V)  
60  
G
40  
20  
0
0.1  
1
10  
100  
1k  
10k 100k  
1M  
10M 100M  
10  
100  
1k  
10k  
100k  
1M  
10M  
Frequency (Hz)  
Frequency (Hz)  
INPUT VOLTAGE AND CURRENT NOISE  
SPECTRAL DENSITY vs FREQUENCY  
CHANNEL SEPARATION vs FREQUENCY  
10k  
1k  
100k  
10k  
1k  
140  
130  
120  
110  
100  
90  
Current Noise  
100  
10  
Voltage Noise  
100  
10  
80  
1
Dual and Quad  
Versions  
70  
0.1  
1
60  
10  
100  
1k  
10k  
100k  
1M  
10M  
10  
100  
1k  
10k  
100k  
1M  
10M  
Frequency (Hz)  
Frequency (Hz)  
TOTAL HARMONIC DISTORTION + NOISE  
vs FREQUENCY  
HARMONIC DISTORTION + NOISE vs FREQUENCY  
1
1
0.1  
G = 1  
VO = 2.5Vp-p  
RL = 600Ω  
(–40dBc)  
RL = 600Ω  
0.1  
(–60dBc)  
G = 100, 3Vp-p (VO = 1V to 4V)  
G = 10, 3Vp-p (VO = 1V to 4V)  
0.01  
(–80dBc)  
0.01  
G = 1, 3Vp-p (VO = 1V to 4V)  
Input goes through transition region  
0.001  
(–100dBc)  
0.001  
0.0001  
3rd Harmonic  
2nd Harmonic  
G = 1, 2.5Vp-p (VO = 0.25V to 2.75V)  
Input does NOT go through transition region  
0.0001  
(–120dBc)  
1k  
10k  
100k  
Frequency (Hz)  
1M  
10  
100  
1k  
10k  
100k  
Frequency (Hz)  
®
4
OPA353, 2353, 4353  
TYPICAL PERFORMANCE CURVES (CONT)  
At TA = +25°C, VS = +5V, and RL = 1kΩ connected to VS/2, unless otherwise noted.  
OPEN-LOOP GAIN vs TEMPERATURE  
DIFFERENTIAL GAIN/PHASE vs RESISTIVE LOAD  
130  
125  
120  
115  
110  
0.5  
0.4  
0.3  
0.2  
0.1  
0
G = 2  
V
O = 1.4V  
Phase  
NTSC Signal Generator  
See Figure 6 for test circuit.  
RL = 1kΩ  
RL = 10kΩ  
Gain  
RL = 600Ω  
–75  
–50 –25  
0
25  
50  
75  
100 125  
0
100 200 300 400 500 600 700 800 900 1000  
Temperature (°C)  
Resistive Load (Ω)  
COMMON-MODE AND POWER SUPPLY  
REJECTION RATIO vs TEMPERATURE  
SLEW RATE vs TEMPERATURE  
90  
80  
70  
60  
50  
110  
40  
35  
30  
25  
20  
15  
10  
5
CMRR, VS = 5V  
(VCM = –0.1V to +5.1V)  
100  
90  
Negative Slew Rate  
Positive Slew Rate  
PSRR  
80  
70  
0
–75  
–50  
–25  
0
25  
50  
75  
100  
125  
–75  
–50  
–25  
0
25  
50  
75  
100  
125  
Temperature (°C)  
Temperature (°C)  
QUIESCENT CURRENT AND  
SHORT-CIRCUIT CURRENT vs TEMPERATURE  
QUIESCENT CURRENT vs SUPPLY VOLTAGE  
Per Amplifier  
7.0  
6.5  
6.0  
5.5  
5.0  
4.5  
4.0  
3.5  
100  
90  
80  
70  
60  
50  
40  
30  
6.0  
5.5  
5.0  
4.5  
4.0  
3.5  
3.0  
+ISC  
–ISC  
IQ  
–75  
–50  
–25  
0
25  
50  
75  
100  
125  
2.0  
2.5  
3.0  
3.5  
4.0  
4.5  
5.0  
5.5  
Temperature (°C)  
Supply Voltage (V)  
®
5
OPA353, 2353, 4353  
TYPICAL PERFORMANCE CURVES (CONT)  
At TA = +25°C, VS = +5V, and RL = 1kΩ connected to VS/2, unless otherwise noted.  
INPUT BIAS CURRENT  
INPUT BIAS CURRENT vs TEMPERATURE  
vs INPUT COMMON-MODE VOLTAGE  
1k  
100  
10  
1.5  
1.0  
0.5  
1
0.0  
0.1  
–0.5  
–75  
–50  
–25  
0
25  
50  
75  
100  
125  
–0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5  
Temperature (°C)  
Common-Mode Voltage (V)  
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY  
CLOSED-LOOP OUTPUT IMPEDANCE vs FREQUENCY  
6
100  
10  
VS = 5.5V  
Maximum output  
voltage without  
slew rate-induced  
distortion.  
5
4
3
2
1
0
1
G = 100  
VS = 2.7V  
0.1  
G = 10  
G = 1  
0.01  
0.001  
0.0001  
1
10  
100  
1k  
10k 100k  
1M  
10M 100M  
100k  
1M  
10M  
100M  
Frequency (Hz)  
Frequency (Hz)  
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT  
OPEN-LOOP GAIN vs OUTPUT VOLTAGE SWING  
IOUT = 250µA  
IOUT = 2.5mA  
V+  
(V+)–1  
(V+)–2  
(V–)+2  
(V–)+1  
(V–)  
140  
130  
120  
110  
100  
90  
+25°C  
–55°C  
+125°C  
Depending on circuit configuration  
(including closed-loop gain) performance  
may be degraded in shaded region.  
IOUT = 4.2mA  
+25°C  
–55°C  
80  
+125°C  
70  
60  
0
±10  
±20  
Output Current (mA)  
±30  
±40  
0
20  
40  
60  
80 100 120 140 160 180 200  
Output Voltage Swing from Supply Rails (mV)  
®
6
OPA353, 2353, 4353  
TYPICAL PERFORMANCE CURVES (CONT)  
At TA = +25°C, VS = +5V, and RL = 1kΩ connected to VS/2, unless otherwise noted.  
OFFSET VOLTAGE DRIFT  
PRODUCTION DISTRIBUTION  
OFFSET VOLTAGE PRODUCTION DISTRIBUTION  
35  
30  
25  
20  
15  
10  
5
25  
20  
15  
10  
5
Typical production  
distribution of  
packaged units.  
Typical production  
distribution of  
packaged units.  
0
0
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15  
–8 –7 –6 –5  
4
–3 –2 –1  
0
1
2
3
4
5
6
7 8  
Offset Voltage Drift (µV/°C)  
Offset Voltage (mV)  
SETTLING TIME vs CLOSED-LOOP GAIN  
SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE  
10  
80  
70  
60  
50  
40  
30  
20  
10  
0
G = 1  
0.01%  
G = –1  
1
G = ±10  
0.1%  
0.1  
10  
100  
1k  
10k  
100k  
1M  
±1  
±10  
±100  
Load Capacitance (pF)  
Closed-Loop Gain (V/V)  
LARGE-SIGNAL STEP RESPONSE  
CL = 100pF  
SMALL-SIGNAL STEP RESPONSE  
CL = 100pF  
200ns/div  
100ns/div  
®
7
OPA353, 2353, 4353  
the OPA353 in unity-gain configuration. Operation is  
from a single +5V supply with a 1kΩ load connected to  
VS /2. The input is a 5Vp-p sinusoid. Output voltage is  
approximately 4.95Vp-p.  
APPLICATIONS INFORMATION  
OPA353 series op amps are fabricated on a state-of-the-art  
0.6 micron CMOS process. They are unity-gain stable and  
suitable for a wide range of general purpose applications.  
Rail-to-rail input/output make them ideal for driving sam-  
pling A/D converters. They are well suited for controlling  
the output power in cell phones. These applications often  
require high speed and low noise. In addition, the OPA353  
series offers a low cost solution for general purpose and  
consumer video applications (75Ω drive capability).  
Power supply pins should be bypassed with 0.01µF ceramic  
capacitors.  
OPERATING VOLTAGE  
OPA353 series op amps are fully specified from +2.7V to  
+5.5V. However, supply voltage may range from +2.5V to  
+5.5V. Parameters are guaranteed over the specified supply  
range—a unique feature of the OPA353 series. In addition,  
many specifications apply from –40°C to +85°C. Most  
behavior remains virtually unchanged throughout the full  
operating voltage range. Parameters which vary signifi-  
cantly with operating voltages or temperature are shown in  
the typical performance curves.  
Excellent ac performance makes the OPA353 series well  
suited for audio applications. Their bandwidth, slew rate,  
low noise (5nV/√Hz), low THD (0.0006%), and small pack-  
age options are ideal for these applications. The class AB  
output stage is capable of driving 600Ω loads connected to  
any point between V+ and ground.  
Rail-to-rail input and output swing significantly increases  
dynamic range, especially in low voltage supply applica-  
tions. Figure 1 shows the input and output waveforms for  
RAIL-TO-RAIL INPUT  
The guaranteed input common-mode voltage range of the  
OPA353 series extends 100mV beyond the supply rails. This  
is achieved with a complementary input stage—an  
N-channel input differential pair in parallel with a P-channel  
differential pair (see Figure 2). The N-channel pair is active  
for input voltages close to the positive rail, typically  
(V+) – 1.8V to 100mV above the positive supply, while the  
P-channel pair is on for inputs from 100mV below the  
negative supply to approximately (V+) – 1.8V. There is a  
small transition region, typically (V+) – 2V to (V+) – 1.6V, in  
which both pairs are on. This 400mV transition region can  
vary ±400mV with process variation. Thus, the transition  
region (both input stages on) can range from (V+) – 2.4V to  
(V+) – 2.0V on the low end, up to (V+) – 1.6V to (V+) – 1.2V  
on the high end.  
VS = +5, G = +1, RL = 1kΩ  
5V  
VIN  
0
5V  
VOUT  
0
FIGURE 1. Rail-to-Rail Input and Output.  
V+  
Reference  
Current  
VIN+  
VIN–  
VBIAS1  
Class AB  
Control  
VO  
Circuitry  
VBIAS2  
V–  
(Ground)  
FIGURE 2. Simplified Schematic.  
®
8
OPA353, 2353, 4353  
A double-folded cascode adds the signal from the two input  
pairs and presents a differential signal to the class AB output  
stage. Normally, input bias current is approximately 500fA.  
However, large inputs (greater than 300mV beyond the  
supply rails) can turn on the OPA353’s input protection  
diodes, causing excessive current to flow in or out of the  
input pins. Momentary voltages greater than 300mV beyond  
the power supply can be tolerated if the current on the input  
pins 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 required.  
FEEDBACK CAPACITOR IMPROVES RESPONSE  
For optimum settling time and stability with high-imped-  
ance feedback networks, it may be necessary to add a  
feedback capacitor across the feedback resistor, RF, as  
shown in Figure 4. This capacitor compensates for the zero  
created by the feedback network impedance and the  
OPA353’s input capacitance (and any parasitic layout  
capacitance). The effect becomes more significant with  
higher impedance networks.  
CF  
RIN  
RF  
V+  
VIN  
V+  
IOVERLOAD  
10mA max  
CIN  
OPA353  
CIN  
VOUT  
OPAx353  
RIN • CIN = RF • CF  
VIN  
VOUT  
5kΩ  
CL  
Where CIN is equal to the OPA353’s input  
capacitance (approximately 9pF) plus any  
parastic layout capacitance.  
FIGURE 3. Input Current Protection for Voltages Exceeding  
the Supply Voltage.  
RAIL-TO-RAIL OUTPUT  
FIGURE 4. Feedback Capacitor Improves Dynamic Perfor-  
mance.  
A class AB output stage with common-source transistors is  
used to achieve rail-to-rail output. For light resistive loads  
(>10kΩ), the output voltage swing is typically ten millivolts  
from the supply rails. With heavier resistive loads (600Ω to  
10kΩ), the output can swing to within a few tens of milli-  
volts from the supply rails and maintain high open-loop  
gain. See the typical performance curves “Output Voltage  
Swing vs Output Current” and “Open-Loop Gain vs Output  
Voltage.”  
It is suggested that a variable capacitor be used for the  
feedback capacitor since input capacitance may vary be-  
tween op amps and layout capacitance is difficult to  
determine. For the circuit shown in Figure 4, the value of  
the variable feedback capacitor should be chosen so that  
the input resistance times the input capacitance of the  
OPA353 (typically 9pF) plus the estimated parasitic layout  
capacitance equals the feedback capacitor times the feed-  
back resistor:  
CAPACITIVE LOAD AND STABILITY  
RIN • CIN = RF • CF  
OPA353 series op amps can drive a wide range of capacitive  
loads. However, all op amps under certain conditions may  
become unstable. Op amp configuration, gain, and load  
value are just a few of the factors to consider when determin-  
ing stability. An op amp in unity gain configuration is the  
most susceptible to the effects of capacitive load. The  
capacitive load reacts with the op amp’s output impedance,  
along with any additional load resistance, to create a pole in  
the small-signal response which degrades the phase margin.  
where CIN is equal to the OPA353’s input capacitance  
(sum of differential and common-mode) plus the layout  
capacitance. The capacitor can be varied until optimum  
performance is obtained.  
DRIVING A/D CONVERTERS  
OPA353 series op amps are optimized for driving medium  
speed (up to 500kHz) sampling A/D converters. However,  
they also offer excellent performance for higher speed  
converters. The OPA353 series provides an effective means  
of buffering the A/D’s input capacitance and resulting  
charge injection while providing signal gain. For applica-  
tions requiring high accuracy, the OPA350 series is recom-  
mended.  
In unity gain, OPA353 series op amps perform well with  
large capacitive loads. Increasing gain enhances the  
amplifier’s ability to drive more capacitance. The typical  
performance curve “Small-Signal Overshoot vs Capacitive  
Load” shows performance with a 1kΩ resistive load. In-  
creasing load resistance improves capacitive load drive ca-  
pability.  
®
9
OPA353, 2353, 4353  
Figure 5 shows the OPA353 driving an ADS7861. The  
ADS7861 is a dual, 12-bit, 500kHz sampling converter in  
the small SSOP-24 package. When used with the miniature  
package options of the OPA353 series, the combination is  
ideal for space-limited and low power applications. For  
further information consult the ADS7861 data sheet.  
from becoming too high, which can cause stability prob-  
lems when driving capacitive loads. As mentioned previ-  
ously, the OPA353 has excellent capacitive load drive  
capability for an op amp with its bandwidth.  
VIDEO LINE DRIVER  
Figure 6 shows a circuit for a single supply, G = 2 com-  
posite video line driver. The synchronized outputs of a  
composite video line driver extend below ground. As  
shown, the input to the op amp should be ac-coupled and  
shifted positively to provide adequate signal swing to  
account for these negative signals in a single-supply con-  
figuration.  
OUTPUT IMPEDANCE  
The low frequency open-loop output impedance of the  
OPA353’s common-source output stage is approximately  
1kΩ. When the op amp is connected with feedback, this  
value is reduced significantly by the loop gain of the op  
amp. For example, with 122dB of open-loop gain, the  
output impedance is reduced in unity-gain to less than  
0.001Ω. For each decade rise in the closed-loop gain, the  
loop gain is reduced by the same amount which results in  
a ten-fold increase in output impedance (see the typical  
performance curve, “Output Impedance vs Frequency”).  
The input is terminated with a 75Ω resistor and ac-coupled  
with a 47µF capacitor to a voltage divider that provides the  
dc bias point to the input. In Figure 6, this point is  
approximately (V–) + 1.7V. Setting the optimal bias point  
requires some understanding of the nature of composite  
video signals. For best performance, one should be careful  
to avoid the distortion caused by the transition region of  
the OPA353’s complementary input stage. Refer to the  
discussion of rail-to-rail input.  
At higher frequencies, the output impedance will rise as  
the open-loop gain of the op amp drops. However, at these  
frequencies the output also becomes capacitive due to  
parasitic capacitance. This prevents the output impedance  
CB1  
+5V  
2kΩ  
2kΩ  
2
3
4
1/4  
OPA4353  
VIN B1  
0.1µF  
0.1µF  
CB0  
24  
+VD  
13  
+VA  
2kΩ  
2kΩ  
2
3
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
CH B1+  
CH B1–  
CH B0+  
CH B0–  
CH A1+  
CH A1–  
CH A0+  
CH A0–  
REFIN  
Serial Data A  
Serial Data B  
BUSY  
6
7
1/4  
OPA4353  
4
5
5
VIN B0  
CLOCK  
6
CA1  
CS  
Serial  
Interface  
ADS7861  
7
RD  
CONVST  
A0  
2kΩ  
2kΩ  
8
9
9
10  
11  
8
1/4  
OPA4353  
M0  
10  
VIN A1  
REFOUT  
M1  
CA0  
DGND  
1
AGND  
12  
2kΩ  
2kΩ  
14  
1/4  
OPA4353  
VIN A0  
11  
VIN = 0V to 2.45V for 0V to 4.9V output.  
Choose CB1, CB0, CA1, CA0 to filter high frequency noise.  
FIGURE 5. OPA4353 Driving Sampling A/D Converter.  
®
10  
OPA353, 2353, 4353  
RG  
RF  
1kΩ  
1kΩ  
C4  
0.1µF  
+5V  
C1  
220µF  
+
0.1µF  
10µF  
7
C5  
1000µF  
ROUT  
Cable  
6
C2  
47µF  
VOUT  
OPA353  
Video  
In  
RL  
R1  
75Ω  
R2  
5kΩ  
4
+5V (pin 7)  
R3  
5kΩ  
R4  
5kΩ  
C3  
10µF  
FIGURE 6. Single-Supply Video Line Driver.  
+5V  
50kΩ  
(2.5V)  
8
RG  
REF1004-2.5  
R1  
100kΩ  
R2  
25kΩ  
4
+5V  
R3  
R4  
25kΩ  
100kΩ  
1/2  
OPA2353  
1/2  
OPA2353  
VOUT  
RL  
10kΩ  
200kΩ  
G = 5 +  
RG  
FIGURE 7. Two Op-Amp Instrumentation Amplifier With Improved High Frequency Common-Mode Rejection.  
<1pF (prevents gain peaking)  
R1  
10.5kΩ  
10MΩ  
+V  
+2.5V  
λ
VO  
OPA353  
C1  
C2  
1830pF  
270pF  
VOUT  
OPA353  
VIN  
RL  
20kΩ  
FIGURE 8. Transimpedance Amplifier.  
R2  
49.9kΩ  
–2.5V  
C1  
4.7µF  
+2.5V  
FIGURE 10. 10kHz High-Pass Filter.  
R1  
2.74kΩ  
R2  
19.6kΩ  
VOUT  
OPA353  
RL  
VIN  
20kΩ  
C2  
1nF  
–2.5V  
FIGURE 9. 10kHz Low-Pass Filter.  
®
11  
OPA353, 2353, 4353  
PACKAGE OPTION ADDENDUM  
www.ti.com  
9-Mar-2005  
PACKAGING INFORMATION  
Orderable Device  
Status (1)  
Package Package  
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)  
Qty  
Type  
MSOP  
MSOP  
SOIC  
Drawing  
DGK  
DGK  
D
OPA2353EA/250  
OPA2353EA/2K5  
OPA2353UA  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
8
8
250  
2500  
100  
None  
None  
None  
None  
None  
None  
None  
None  
None  
CU NIPDAU Level-1-220C-UNLIM  
CU NIPDAU Level-1-220C-UNLIM  
8
CU  
CU  
Level-3-220C-168 HR  
Level-3-220C-168 HR  
OPA2353UA/2K5  
OPA353NA/250  
OPA353NA/3K  
OPA353UA  
SOIC  
D
8
2500  
250  
SOT-23  
SOT-23  
SOIC  
DBV  
DBV  
D
5
CU NIPDAU Level-3-220C-168 HR  
CU NIPDAU Level-3-220C-168 HR  
5
3000  
100  
8
CU  
CU  
Level-3-220C-168 HR  
Level-3-220C-168 HR  
OPA353UA/2K5  
OPA4353EA/250  
SOIC  
D
8
2500  
250  
SSOP/  
QSOP  
DBQ  
16  
CU NIPDAU Level-3-260C-168 HR  
Call TI Call TI  
CU NIPDAU Level-3-260C-168 HR  
OPA4353EA/250G4  
OPA4353EA/2K5  
PREVIEW  
ACTIVE  
SSOP/  
QSOP  
DBQ  
DBQ  
16  
16  
250  
None  
None  
SSOP/  
QSOP  
2500  
OPA4353UA  
OPA4353UA/2K5  
OPA4353UA/2K5G4  
ACTIVE  
ACTIVE  
ACTIVE  
SOIC  
SOIC  
SOIC  
D
D
D
14  
14  
14  
58  
None  
None  
None  
CU SNPB  
CU SNPB  
Call TI  
Level-3-220C-168 HR  
Level-3-220C-168 HR  
Call TI  
2500  
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.  
(2)  
Eco Plan - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional  
product content details.  
None: Not yet available Lead (Pb-Free).  
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements  
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered  
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.  
Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens,  
including bromine (Br) or antimony (Sb) above 0.1% of total product weight.  
(3)  
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications, and peak solder  
temperature.  
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is  
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the  
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take  
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on  
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited  
information may not be available for release.  
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI  
to Customer on an annual basis.  
Addendum-Page 1  
IMPORTANT NOTICE  
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,  
enhancements, improvements, and other changes to its products and services at any time and to discontinue  
any product or service without notice. Customers should obtain the latest relevant information before placing  
orders and should verify that such information is current and complete. All products are sold subject to TI’s terms  
and conditions of sale supplied at the time of order acknowledgment.  
TI warrants performance of its hardware products to the specifications applicable at the time of sale in  
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI  
deems necessary to support this warranty. Except where mandated by government requirements, testing of all  
parameters of each product is not necessarily performed.  
TI assumes no liability for applications assistance or customer product design. Customers are responsible for  
their products and applications using TI components. To minimize the risks associated with customer products  
and applications, customers should provide adequate design and operating safeguards.  
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,  
copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process  
in which TI products or services are used. Information published by TI regarding third-party products or services  
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.  
Use of such information may require a license from a third party under the patents or other intellectual property  
of the third party, or a license from TI under the patents or other intellectual property of TI.  
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without  
alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction  
of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for  
such altered documentation.  
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that  
product or service voids all express and any implied warranties for the associated TI product or service and  
is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.  
Following are URLs where you can obtain information on other Texas Instruments products and application  
solutions:  
Products  
Applications  
Audio  
Amplifiers  
amplifier.ti.com  
www.ti.com/audio  
Data Converters  
dataconverter.ti.com  
Automotive  
www.ti.com/automotive  
DSP  
dsp.ti.com  
Broadband  
Digital Control  
Military  
www.ti.com/broadband  
www.ti.com/digitalcontrol  
www.ti.com/military  
Interface  
Logic  
interface.ti.com  
logic.ti.com  
Power Mgmt  
Microcontrollers  
power.ti.com  
Optical Networking  
Security  
www.ti.com/opticalnetwork  
www.ti.com/security  
www.ti.com/telephony  
www.ti.com/video  
microcontroller.ti.com  
Telephony  
Video & Imaging  
Wireless  
www.ti.com/wireless  
Mailing Address:  
Texas Instruments  
Post Office Box 655303 Dallas, Texas 75265  
Copyright 2005, Texas Instruments Incorporated  

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