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Details, datasheet, quote on part number:OPA2684
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Datasheet text preview:
OPA 268 4
OPA2684
SBOS239B APRIL 2002 REVISED NOVEMBER 2002
Low-Power, Dual Current-Feedback OPERATIONAL AMPLIFIER
FEATURES
q q q q q q q q MINIMAL BANDWIDTH CHANGE VERSUS GAIN 170MHz BANDWIDTH AT G = +2 > 120MHz BANDWIDTH TO GAIN > +10 LOW DISTORTION: < 82dBc at 5MHz HIGH OUTPUT CURRENT: 120mA SINGLE +5V TO +12V SUPPLY OPERATION DUAL ±2.5 TO ±6.0V SUPPLY OPERATION LOW SUPPLY CURRENT: 3.4mA Total
APPLICATIONS
q q q q q q q SHORT-LOOP ADSL CO DRIVER LOW-POWER BROADCAST VIDEO DRIVERS DIFFERENTIAL EQUALIZING FILTERS DIFFERENTIAL SAW FILTER POST AMPLIFIER MULTICHANNEL SUMMING AMPLIFIERS PROFESSIONAL CAMERAS ADC INPUT DRIVERS
DESCRIPTION
The OPA2684 provides a new level of performance in lowpower, wideband, current-feedback (CFB) amplifiers. This CFBPLUS amplifier is among the first to use an internally closed-loop input buffer stage that enhances performance significantly over earlier low-power CFB amplifiers. While retaining the benefits of very low power operation, this new architecture provides many of the benefits of a more ideal CFB amplifier. The closed-loop input stage buffer gives a very low and linearized impedance path at the inverting input to sense the feedback error current. This improved inverting input impedance retains exceptional bandwidth to much higher gains and improves harmonic distortion over earlier solutions limited by inverting input linearity. Beyond simple high-gain applications, the OPA2684 CFBPLUS amplifier permits the gain setting element to be set with considerable
freedom from amplifier bandwidth interaction. This allows frequency response peaking elements to be added, multiple input inverting summing circuits to have greater bandwidth, and low-power line drivers to meet the demanding requirements of studio cameras and broadcast video. The output capability of the OPA2684 also sets a new mark in performance for low-power, current-feedback amplifiers. Delivering a full ±4Vp-p swing on ±5V supplies, the OPA2684 also has the output current to support > ±3Vp-p into 50 loads. This minimal output headroom requirement is complemented by a similar 1.2V input stage headroom giving exceptional capability for single +5V operation. The OPA2684's low 3.4mA supply current is precisely trimmed at +25°C. This trim, along with low shift over temperature and supply voltage, gives a very robust design over a wide range of operating conditions.
V+
1 of 2 Channels
BW (MHz) vs GAIN
6
Normalized Gain (3dB/div)
3 0 3 6 9 12 15 18 21 24 10 RF = 800 MHz G = 10 G = 20 G = 50 G = 100 G=5
G=1 G=2
+
VO
V IERR RF
Z(S) IERR
RG
Low-Power
Patent Pending
Amplifier
100
200
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 © 2002, Texas Instruments Incorporated
www.ti.com
ABSOLUTE MAXIMUM RATINGS(1)
Power Supply ....... ±6.5VDC Internal Power Dissipation ......... See Thermal Information Differential Input Voltage ......... ±1.2V Input Voltage Range .......... ±VS Storage Temperature Range: ID, IDBV ....... 40°C to +125°C Lead Temperature (soldering, 10s) .... +300°C Junction Temperature (TJ ) .. +175°C ESD Rating: Human Body Model (HBM) ....... 2000V Charged Device Model (CDM) .......... 1500V NOTE: (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability.
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.
OPA2684 RELATED PRODUCTS
SINGLES OPA684 OPA691 OPA685 DUALS OPA2683 OPA2691 -- TRIPLES OPA3684 OPA3691 -- QUADS OPA2684 -- -- FEATURES Low-Power CFBPLUS High Slew Rate CFB > 500MHz CFB
PACKAGE /ORDERING INFORMATION
PRODUCT OPA2684 PACKAGE-LEAD SO-8 PACKAGE DESIGNATOR(1) D SPECIFIED TEMPERATURE RANGE 40°C to +85°C PACKAGE MARKING OPA2684 ORDERING NUMBER OPA2684ID OPA2684IDR OPA2684IDCNT OPA2684IDCNR TRANSPORT MEDIA, QUANTITY Rails, 100 Tape and Reel, 2500 Tape and Reel, 250 Tape and Reel, 3000
"
OPA2684
"
SOT23-8
"
DCN
"
40°C to +85°C
"
A84
"
"
"
"
"
NOTE: (1) For the most current specifications, and package information, refer to our web site at www.ti.com.
PIN CONFIGURATION
Top View SO Top View SOT
Out A In A +In A
1 2 3 4
8 7 6 5
+VS Out B In B +In B
OPA2684 Out A In A +In A VS 1 2 3 4 8 7 6 5 +VS Out B In B +In B
VS
A84
Pin 1
2
OPA2684
www.ti.com
SBOS239B
ELECTRICAL CHARACTERISTICS: VS = ±5V
Boldface limits are tested at +25°C.
RF = 800, RL = 100, and G = +2, (see Figure 1 for AC performance only), unless otherwise noted. OPA2684ID, IDCN TYP +25°C 250 170 138 120 95 19 1.4 90 780 750 3 3.8 67 82 70 84 3.7 9.4 17 0.04 0.02 70 355 ±1.5 ±5.0 ±5.0 MIN/MAX OVER TEMPERATURE +25°C(1) 0°C to 70°C(2) 40°C to +85°C(2) MIN/ TEST MAX LEVEL(3) typ min typ typ typ min max typ min min typ typ max max max max max max max typ typ typ min max max max max max max min min typ typ min min min typ typ max max min typ typ typ typ C B C C C B B C B B C C B B B B B B B C C C A A B A B A B A A C C A A A C C A A A A C C C
PARAMETER AC PERFORMANCE (see Figure 1) Small-Signal Bandwidth (VO = 0.5Vp-p)
CONDITIONS G = +1, RF = 800 G = +2, RF = 800 G = +5, RF = 800 G = +10, RF = 800 G = +20, RF = 800 G = +2, VO = 0.5Vp-p, RF = 800 RF = 800, VO = 0.5Vp-p G = +2, VO = 4Vp-p G = 1, VO = 4V Step G = +2, VO = 4V Step G = +2, VO = 0.5V Step G = +2, VO = 4V Step G = +2, f = 5MHz, VO = 2Vp-p RL = 100 RL 1k RL = 100 RL 1k f > 1MHz f > 1MHz f > 1MHz G = +2, NTSC, VO = 1.4Vp, RL = 150 G = +2, NTSC, VO = 1.4Vp, RL = 150 f = 5MHz VO = 0V, RL = 1k VCM = 0V VCM = 0V VCM = 0V VCM = 0V VCM = 0V VCM = 0V
UNITS MHz MHz MHz MHz MHz MHz dB MHz V/µs V/µs ns ns dBc dBc dBc dBc nV/Hz pA/Hz pA/Hz % deg dB k mV µV/°C µA nA/°C µA nA°/C V dB k || pF V mA mA V V mA mA dB °C °C/W °C/W
120
118
117
Bandwidth for 0.1dB Gain Flatness Peaking at a Gain of +1 Large-Signal Bandwidth Slew Rate Rise-and-Fall Time Harmonic Distortion 2nd-Harmonic 3rd-Harmonic Input Voltage Noise Noninverting Input Current Noise Inverting Input Current Noise Differential Gain Differential Phase Channel-to-Channel Isolation DC PERFORMANCE(4) Open-Loop Transimpedance Gain (ZOL) Input Offset Voltage Average Offset Voltage Drift Noninverting Input Bias Current Average Noninverting Input Bias Current Drift Inverting Input Bias Current Average Inverting Input Bias Current Drift INPUT Common-Mode Input Range(5) (CMIR) Common-Mode Rejection Ratio (CMRR) Noninverting Input Impedance Inverting Input Resistance (RI) OUTPUT Voltage Output Swing Current Output, Sourcing Current Output, Sinking Closed-Loop Output Impedance POWER SUPPLY Specified Operating Voltage Maximum Operating Voltage Range Max Quiescent Current Min Quiescent Current Power-Supply Rejection Ratio (PSRR) TEMPERATURE RANGE Specification: ID, IDCN Thermal Resistance, JA D SO- 8 DCN SOT23-8
16 4.8 675 680
14 5.9 650 660
14 6.3 575 656
59 66 66 82 4.1 11 18
59 65 65 81 4.2 12 18.5
58 65 65 81 4.4 12.5 19
±3.8 ±11 ±17 ±3.65
53
160
155 ±4.4 ±12 ±12.5 ±25 ±18.5 ±35 ±3.65 52
153 ±4.6 ±12 ±13 ±30 ±19.5 ±40 ±3.6 52
VCM = 0V Open-Loop, DC 1k Load VO = 0 VO = 0 G = +2, f = 100kHz
±3.75 60 50 || 2 4.0 ±4.1 160 120 0.006 ±5
±3.9
130 100
±3.9 125 95
±3.8 120 90
VS = ±5V VS = ±5V Input Referred
±6
3.6 3.2 54
3.4 3.4 60 40 to +85
±6 3.9 3.1 53
±6 3.9 2.9 53
Junction-to-Ambient 125 150
NOTES: (1) Junction temperature = ambient for +25°C tested specifications. (2) Junction temperature = ambient at low temperature limit, junction temperature = ambient +2°C at high temperature limit for over temperature tested specifications. (3) 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. (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.
OPA2684
SBOS239B
www.ti.com
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