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Details, datasheet, quote on part number:OPA2681
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| Part: | OPA2681 |
| Category: | Analog & Mixed-Signal Processing => Amplifiers => High Speed/Video Amplifiers => Current Feedback |
| Description: | |
| Company: | Texas Instruments, Inc. |
| Datasheet: | Download OPA2681 datasheet File size : 370 kB |
| Request For quote: | Find where to buy OPA2681
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Datasheet text preview:
OPA
OPA 268
268
OPA2681
1
1
www.ti.com
Dual Wideband, Current Feedback OPERATIONAL AMPLIFIER With Disable
TM
FEATURES
q q q q q q q q WIDEBAND +5V OPERATION: 225MHz (G = +2) UNITY GAIN STABLE: 280MHz (G = 1) HIGH OUTPUT CURRENT: 150mA OUTPUT VOLTAGE SWING: ±4.0V HIGH SLEW RATE: 2100V/µs LOW SUPPLY CURRENT: 6mA/ch LOW DISABLED CURRENT: 200µA/ch ENABLE/DISABLE TIME: 25ns/100ns
APPLICATIONS
q q q q q q q q xDSL LINE DRIVER MATCHED I/Q CHANNEL AMPLIFIER BROADBAND VIDEO BUFFERS HIGH SPEED IMAGING CHANNELS PORTABLE INSTRUMENTS DIFFERENTIAL ADC DRIVERS ACTIVE FILTERS WIDEBAND INVERTING SUMMING
DESCRIPTION
The OPA2681 sets a new level of performance for broadband dual current feedback op amps. Operating on a very low 6mA/ch supply current, the OPA2681 offers a slew rate and output power normally associated with a much higher supply current. A new output stage architecture delivers a high output current with minimal voltage headroom and crossover distortion. This gives exceptional single supply operation. Using a single +5V supply, the OPA2681 can deliver a 1V to 4V output swing with over 100mA drive current and 150MHz bandwidth. This combination of features makes the OPA2681 an ideal RGB line driver or single supply ADC input driver.
+12V
The OPA2681's low 6mA/ch supply current is precisely trimmed at 25°C. This trim, along with low drift over temperature, guarantees lower guaranteed maximum supply current than competing products. System power may be further reduced by using the optional disable control pin (SO-14 only). Leaving this disable pin open, or holding it high, gives normal operation. If pulled low, the OPA2681 supply current drops to less than 400µA while the output goes into a high impedance state. This feature may be used for either power savings or for video MUX applications.
OPA2681 RELATED PRODUCTS
SINGLES Voltage Feedback Current Feedback Fixed Gain OPA680 OPA681 OPA682 DUALS OPA2680 OPA2681 OPA2682 TRIPLES OPA3680 OPA3681 OPA3682
1/2 OPA2681
324 2k 2k 1µF 100 324
12.4
1:2
+6.5V 2Vp-p
100 12.4
15Vp-p
1/2 OPA2681
Single Supply ADSL Upstream Driver
Copyright © 1997, Texas Instruments Incorporated
SBOS091A
Printed in U.S.A. January, 2001
SPECIFICATIONS: VS = ±5V
RF = 402, RL = 100, and G = +2, (Figure 1 for AC performance only), unless otherwise noted. OPA2681U, N TYP +25°C 280 220 185 125 90 0.4 150 2100 1.7 2.0 12 8 79 85 74 77 2.5 12 15 0.001 0.008 0.01 0.05 70 100 ±1.3 +30 ±10 +25°C(2) GUARANTEED 0°C to 70°C(3) 40°C to +85°C(3) MIN/ TEST MAX LEVEL(1) typ min typ typ min max typ min typ typ typ typ max max max max max max max typ typ typ typ typ min max max max max max max min min typ typ min min min min typ typ typ typ typ typ typ typ min max max typ max max min min typ typ typ C B C C B B C B C C C C B B B B B B B C C C C C A A B A B A B A A C C A A A A C C C C C C C C A A A C A A A A C C C
PARAMETER AC PERFORMANCE (Figure 1) Small-Signal Bandwidth (VO = 0.5Vp-p)
CONDITIONS G = +1, RF = 453 G = +2, RF = 402 G = +5, RF = 261 G = +10, RF = 180 G = +2, VO = 0.5Vp-p RF = 453, VO = 0.5Vp-p G = +2, VO = 5Vp-p G = +2, 4V Step G = +2, VO = 0.5V Step G = +2, 5V Step G = +2, VO = 2V Step G = +2, VO = 2V Step G = +2, f = 5MHz, VO = 2Vp-p RL = 100 RL 500 RL = 100 RL 500 f > 1MHz f > 1MHz f > 1MHz G = +2, NTSC, VO = 1.4Vp, RL = 150 RL = 37.5 G = +2, NTSC, VO = 1.4Vp, RL = 150 RL = 37.5 f = 5MHz VO = 0V, RL = 100 VCM = 0V VCM = 0V VCM = 0V VCM = 0V VCM = 0V VCM = 0V
UNITS MHz MHz MHz MHz MHz dB MHz V/µs ns ns ns ns dBc dBc dBc dBc nV/Hz pA/Hz pA/Hz % % deg deg dBc k mV µV/°C µA nA/°C µA nA°/C V dB k || pF V V mA mA µA ns ns dB pF mV mV V V µA V V mA mA dB °C °C/W °C/W
220
210
190
Bandwidth for 0.1dB Gain Flatness Peaking at a Gain of +1 Large-Signal Bandwidth Slew Rate Rise/Fall Time Settling Time to 0.02% 0.1% Harmonic Distortion 2nd Harmonic 3rd Harmonic Input Voltage Noise Non-Inverting Input Current Noise Inverting Input Current Noise Differential Gain Differential Phase
50 2 1600
45 4 1600
45
1200
73 77 71 75 3.0 14 18
70 70 71 74 3.4 15 18
68 69 68 72 3.6 15 19
Channel-to-Channel Crosstalk DC PERFORMANCE(4) Open-Loop Transimpedance Gain (ZOL) Input Offset Voltage Average Offset Voltage Drift Non-Inverting Input Bias Current Average Non-Inverting Input Bias Current Drift Inverting Input Bias Current Average Inverting Input Bias Current Drift INPUT Common-Mode Input Range (CMIR)(5) Common-Mode Rejection (CMR) Non-Inverting Input Impedance Inverting Input Resistance (RI) OUTPUT Voltage Output Swing Current Output, Sourcing Current Output, Sinking Closed-Loop Output Impedance DISABLE (Disabled Low) (SO-14 only) Power Down Supply Current (+VS) Disable Time Enable Time Off Isolation Output Capacitance in Disable Turn On Glitch Turn Off Glitch Enable Voltage Disable Voltage Control Pin Input Bias Current (DIS) POWER SUPPLY Specified Operating Voltage Maximum Operating Voltage Range Max Quiescent Current Min Quiescent Current Power Supply Rejection Ratio (PSRR) TEMPERATURE RANGE Specification: U, N Thermal Resistance, JA U SO-8 N SO-14
±5
+55
56
±40 ±3.4
47
56 ±6.5 +35 ±65 400 ±50 125 ±3.3 46
56 ±7.5 +40 ±85 450 ±55 150 ±3.2 45
VCM = 0V Open-Loop No Load 100 Load VO = 0 VO = 0 G = +2, f = 100kHz VDIS = 0, Both Channels G = +2, 5MHz G = +2, RL = 150, VIN = 0 G = +2, RL = 150, VIN = 0 VDIS = 0, Each Channel
±3.5 52 100 || 2 42 ±4.0 ±3.9 +190 150 0.03 640 100 25 70 4 ±50 ±20 3.3 1.8 100 ±5
±3.8 ±3.7
+160 135
±3.7 ±3.6 +140 130
±3.6 ±3.3 +80 80
3.5 1.7 160
3.6 1.6 160
3.7 1.5 160
VS = ±5V VS = ±5V Input Referred
±6
12.8 11.2 52
12 12 58 40 to +85
±6 13.4 10.7 50
±6 13.6 9.7 49
Junction-to-Ambient 125 100
NOTES: (1) Test Levels: (A) 100% tested at 25°C. Over temperature limits by characterization and simulation. (B) Limits set by characterization and simulation. (C) Typical value only for information. (2) Junction temperature = ambient for 25°C guaranteed specifications. (3) Junction temperature = ambient at low temperature limit: junction temperature = ambient +23°C at high temperature limit for over temperature guaranteed specifications. (4) Current is considered positive out of node. VCM is the input common-mode voltage. (5) Tested < 3dB below minimum specified CMR at ± CMIR limits.
2
OPA2681
SBOS091A
SPECIFICATIONS: VS = +5V
RF = 499, RL = 100 to VS / 2, G = +2, (Figure 2 for AC performance only), unless otherwise noted. OPA2681U, N TYP +25°C 250 225 180 165 100 0.4 200 830 1.5 2.0 14 9 70 72 72 73 2.2 12 15 100 ±1 +40 ±5 +25°C(2) GUARANTEED 0°C to 70°C(3) 40°C to +85°C(3) MIN/ TEST MAX LEVEL(1) typ min typ typ min max min min typ typ typ typ max max max max max max max min max max max max max max max min min typ min max min min max max min min typ typ typ typ typ typ typ typ min max typ typ max max min typ typ typ typ C B C C B B B B C C C C B B B B B B B A A B A B A B A A A C A A A A A A A A C C C C C C C C A A C C A A A C C C C
PARAMETER AC PERFORMANCE (Figure 2) Small Signal Bandwidth (VO = 0.5Vp-p)
CONDITIONS G = +1, RF = 649 G = +2, RF = 499 G = +5, RF = 360 G = +10, RF = 200 G = +2, VO 1MHz f > 1MHz f > 1MHz VO = VS / 2, RL = 100 to VS / 2 VCM = 2.5V VCM = 2.5V VCM = 2.5V VCM = 2.5V VCM = 2.5V VCM = 2.5V
UNITS MHz MHz MHz MHz MHz dB MHz V/µs ns ns ns ns dBc dBc dBc dBc nV/Hz pA/Hz pA/Hz k mV µV/°C µA nA/°C µA nA / °C V V dB k || pF V V V V mA mA µA ns ns dB pF mV mV V V µA V V mA mA dB °C °C/W °C/W
180
140
110
Bandwidth for 0.1dB Gain Flatness Peaking at a Gain of +1 Large Signal Bandwidth Slew Rate Rise/Fall Time Settling Time to 0.02% 0.1% Harmonic Distortion 2nd Harmonic 3rd Harmonic Input Voltage Noise Non-Inverting Input Current Noise Inverting Input Current Noise DC PERFORMANCE(4) Open-Loop Transimpedance Gain (ZOL) Input Offset Voltage Average Offset Voltage Drift Non-Inverting Input Bias Current Average Non-Inverting Input Bias Current Drift Inverting Input Bias Current Average Inverting Input Bias Current Drift INPUT Least Positive Input Voltage(5) Most Positive Input Voltage(5) Common-Mode Rejection (CMR) Non-Inverting Input Impedance Minimum Inverting Input Resistance (RI ) Maximum Inverting Input Resistance (RI ) OUTPUT Most Positive Output Voltage Least Positive Output Voltage Current Output, Sourcing Current Output, Sinking Closed-Loop Output Impedance DISABLE (Disable Low) (SO-14 only) Power Down Supply Current (+VS) Disable Time Enable Time Off Isolation Output Capacitance in Disable Turn On Glitch Turn Off Glitch Enable Voltage Disable Voltage Control Pin Input Bias Current (DIS) POWER SUPPLY Specified Single Supply Operating Voltage Maximum Single Supply Operating Voltage Max Quiescent Current Min Quiescent Current Power Supply Rejection Ratio (PSRR) TEMPERATURE RANGE Specification: U, N Thermal Resistance, JA U SO-8 N SO-14
50 2 700
45 4 680
45
570
68 70 65 68 3 14 18
67 70 65 67 3.4 14 18 53 ± 6.0 +15 +75 300 ±25 125 1.7 3.3 44 30 67 3.7 3.6 1.3 1.4 110 70
63 68 62 67 3.6 15 19 51 ±7 +20 +95 350 ±35 175 1.8 3.2 44 29 74 3.5 3.4 1.5 1.6 60 50
±5
+65
60
±20
1.6 3.4 45 32 65 3.8 3.7 1.2 1.3 110 75
VCM = 2.5V Open-Loop Open-Loop No Load RL = 100, 2.5V No Load RL = 100, 2.5V VO = V S / 2 VO = V S / 2 G = +2, f = 100kHz VDIS = 0, Both Channels G = +2, 5MHz G = +2, RL = 150, VIN = VS /2 G = +2, RL = 150, VIN = VS /2 VDIS = 0, Each Channel
1.5 3.5 51 100 || 2 45 45 4 3.9 1 1.1 150 110 0.03 540 100 25 65 4 ±50 ±20 3.3 1.8 100 5
3.5 1.7
3.6 1.6
3.7 1.5
VS = +5V VS = +5V Input Referred
9.6 9.6 48 40 to +85 125 100
12 10.8 8.2
12 11 8.0
12 11 8.0
NOTES: (1) Test Levels: (A) 100% tested at 25°C. Over temperature limits by characterization and simulation. (B) Limits set by characterization and simulation. (C) Typical value only for information. (2) Junction temperature = ambient for 25°C guaranteed specifications. (3) Junction temperature = ambient at low temperature limit: junction temperature = ambient +23°C at high temperature limit for over temperature guaranteed specifications. (4) Current is considered positive out of node. VCM is the input common-mode voltage. (5) Tested < 3dB below minimum specified CMR at ±CMIR limits.
OPA2681
SBOS091A
3
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