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PDF OPA2683 Data sheet ( Hoja de datos )
| Número de pieza | OPA2683 | |
| Descripción | Wideband / Low-Power / Current Feedback Operational Amplifier | |
| Fabricantes | Burr-Brown | |
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OPA2683
OPA2683
SBOS244D – MAY 2002 – REVISED JANUARY 2005
Very Low-Power, Dual, Current-Feedback
Operational Amplifier
FEATURES
q REDUCED BANDWIDTH CHANGE VERSUS GAIN
q 150MHz BANDWIDTH G = +2
q > 80MHz BANDWIDTH TO GAIN > +10
q LOW DISTORTION: < –65dBc at 5MHz
q HIGH OUTPUT CURRENT: 110mA
q SINGLE-SUPPLY OPERATION: +5V to +12V
q DUAL-SUPPLY OPERATION: ±2.5V to ±6V
q LOW SUPPLY CURRENT: 1.9mA Total
APPLICATIONS
q LOW-POWER BROADCAST VIDEO DRIVERS
q µPOWER ACTIVE FILTERS
q SHORT-LOOP ADSL CO DRIVERS
q MULTICHANNEL SUMMING AMPLIFIERS
q PROFESSIONAL CAMERAS
q DIFFERENTIAL ADC INPUT DRIVERS
DESCRIPTION
considerable freedom from amplifier bandwidth interaction. This
flexibility allows frequency response peaking elements to be
The OPA2683 provides a new level of performance for dual, very
added, multiple input inverting summing circuits to have greater
low-power, wideband, current-feedback amplifiers. This CFBPLUS
bandwidth, and low-power differential line drivers to meet the
amplifier is among the first to use an internally closed-loop input
demanding requirements of DSL.
buffer stage that significantly enhances performance over earlier
low-power, current-feedback (CFB) amplifiers. This new archi-
tecture provides many of the advantages of a more ideal CFB
The output capability for the OPA2683 also sets a new mark in
performance for very low-power, current-feedback amplifiers. DeD- ataShee
amplifier while retaining the
The closed-loop input stage
bbuefnfeerfigtsivoefsvaervyelroywlo-pwowanDedraolitnpaeeSarahritzieoeend.t4U.cotlihmveerionugtpauftulcl u±r4rVenPtP
swing on ±5V supplies, the
to support this swing into
OPA2683 also has
a 100Ω load. This
impedance path at the inverting input to sense the feedback error
current. This improved inverting input impedance gives excep-
minimal output headroom requirement is complemented by a
similar 1.2V input stage headroom, giving exceptional capability for
tional bandwidth retention to much higher gains and improved
single +5V operation.
harmonic distortion over earlier solutions limited by inverting input
The OPA2683’s low 1.9mA total supply current is precisely trimmed
linearity. Beyond simple high gain applications, the OPA2683
at +25°C. This trim, along with low shift over temperature and supply
CFBPLUS amplifier can allow the gain setting element to be set with
voltage, gives a very robust design over a wide range of operating
conditions.
V+
+
VO
V–
IERR
Z(S) IERR
RF
RG
Low-Power
Amplifier
U.S. Patent No. 6,724,260
NONINVERTING SMALL-SIGNAL
FREQUENCY RESPONSE
6
G = 10 G = 1
3
G=2
0
–3 G = 50
–6
G = 10
–9
–12 G = 50
–15
RF = 953Ω
–18
1
G = 100
10
Frequency (Hz)
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.
All trademarks are the property of their respective owners.
DataSheet4U.com
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 © 2002-2005, Texas Instruments Incorporated
DataSheet4 U .com
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TYPICAL CHARACTERISTICS: VS = ±5V
TA = +25°C, G = +2, RF = 953Ω, and RL = 1kΩ, unless otherwise noted.
NONINVERTING SMALL-SIGNAL
FREQUENCY RESPONSE
6
G = 10 G = 1
3
G=2
0
–3 G = 50
–6
G = 10
–9
–12 G = 50
–15
See Figure 1
–18
1
G = 100
10
Frequency (MHz)
100 200
INVERTING SMALL-SIGNAL
FREQUENCY RESPONSE
6
VO = 0.5VPP
3 RF = 953Ω
0
–3
G = –1
G = –2
–6
–9
–12
G = –10
G = –5
–15
See Figure 2
–18
1
G = –20
10
Frequency (MHz)
100 200
et4U.com
NONINVERTING LARGE-SIGNAL
FREQUENCY RESPONSE
9
RF = 953Ω
G = +2
6
0.5VPP
3
RF = 953Ω
G = –2
0
INVERTING LARGE-SIGNAL
FREQUENCY RESPONSE
1VPP
0.5VPP
3
0
See Figure 1
–3
1
–3
1VPP DataSheet4U.com –6
10
Frequency (MHz)
2VPP
5VPP
100
200
–9
See Figure 2
–12
1
2VPP
5VPP
DataShee
10
Frequency (MHz)
100 200
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
NONINVERTING PULSE RESPONSE
G = +2
Large-Signal Right Scale
Small-Signal Left Scale
See Figure 1
Time (10ns/div)
3.2
2.4
1.6
0.8
0
–0.8
–1.6
–2.4
–3.2
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
INVERTING PULSE RESPONSE
G = –1
Small-Signal Left Scale
Large-Signal Right Scale
See Figure 2
Time (10ns/div)
3.2
2.4
1.6
0.8
0
–0.8
–1.6
–2.4
–3.2
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OPA2683
SBOS244D
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www.ti.com
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TYPICAL CHARACTERISTICS: VS = +5V (Cont.)
TA = +25°C, VS = 5V, G = +2, RF = 1.2kΩ, and RL = 1kΩ, unless otherwise noted.
HARMONIC DISTORTION vs LOAD RESISTANCE
–50
f = 5MHz
–55
2nd-Harmonic
–60
VO = 2VPP
–65
3rd-Harmonic
–70
–75
–80
–85
See Figure 3
–90
100
Load Resistance (Ω)
1k
HARMONIC DISTORTION vs FREQUENCY
–50
VO = 2VPP
RL = 1kΩ
–60
2nd-Harmonic
–70
–80 3rd-Harmonic
See Figure 3
–90
0.1
1
Frequency (MHz)
10 20
et4U.com
HARMONIC DISTORTION vs OUTPUT VOLTAGE
–50
–55
–60
–65
–70
–75 3rd-Harmonic
–80
–85
See Figure 3
–90
0.1
2nd-Harmonic
1
Output Voltage (VPP)
DataSheet4U.com
3
2-TONE, 3RD-ORDER
INTERMODULATION DISTORTION
–40
–50
20MHz
–60
10MHz
–70
5MHz
–80
See Figure 3
–90
0.1
VPP at 1kΩ Load (each tone)
DataShee
1
SUPPLY AND OUTPUT CURRENT
vs TEMPERATURE
100 1.9
90 1.8
Sourcing Output Current
Left Scale
80 1.7
Supply Current
Right Scale
70 1.6
Left Scale
Sinking Output Current
60 1.5
50
–50
–25
0 25 50 75
Ambient Temperature (°C)
1.4
100 125
COMPOSITE VIDEO DIFFERENTIAL GAIN/PHASE
0.30
G = +2
NTSC, Positive Video
0.25
0.20
dG
0.15
0.10
dP
0.05
0
1234
Number of 150Ω Video Loads
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OPA2683
SBOS244D
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| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet OPA2683.PDF ] | |
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