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OPA683ID Datasheet

  • OPA683ID

  • OP-AMP|SINGLE|BIPOLAR|SOP|8PIN|PLASTIC

  • 24頁

  • ETC

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OPA683
OPA
683
OPA6
83
SBOS221B 鈥?NOVEMBER 2001 鈥?REVISED 鈥?JUNE 2002
Very Low-Power, Current Feedback
OPERATIONAL AMPLIFIER With Disable
FEATURES
q
q
q
q
q
q
q
q
q
REDUCED BANDWIDTH CHANGE VERSUS GAIN
150MHz BANDWIDTH G = +2
> 90MHz BANDWIDTH TO GAIN > +10
LOW DISTORTION: < 鈥?9dBc at 5MHz
HIGH OUTPUT CURRENT: 110mA
SINGLE +5V TO +12V SUPPLY OPERATION
DUAL
鹵
2.5V TO
鹵
6V SUPPLY OPERATION
LOW SUPPLY CURRENT: 0.94mA
LOW SHUTDOWN CURRENT: 100
碌
A
APPLICATIONS
q
q
q
q
q
q
q
LOW POWER BROADCAST VIDEO DRIVERS
EQUALIZING FILTERS
SAW FILTER HIGH GAIN POST AMPLIFIERS
SHORT LOOP ADSL CO DRIVERS
MULTICHANNEL SUMMING AMPLIFIERS
PROFESSIONAL CAMERAS
ADC INPUT DRIVERS
DESCRIPTION
The OPA683 provides a new level of performance in very low-
power, wideband, current feedback amplifiers. This CFB
plus
ampli-
fier 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
advantages 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 gives exceptional bandwidth retention
to much higher gains and improved harmonic distortion over earlier
solutions limited by inverting input linearity. Beyond simple high
gain applications, the OPA683 CFB
plus
amplifier can allow 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 for the OPA683 also sets a new mark in
performance for very low-power current feedback amplifiers. De-
livering a full
鹵4Vp-p
swing on
鹵5V
supplies, the OPA683 also has
the output current to support this swing into a 100鈩?load. This
minimal output headroom requirement is complemented by a
similar 1.2V input stage headroom giving exceptional capability for
single +5V operation.
The OPA683鈥檚 low 0.94mA supply current is precisely trimmed at
25擄C. This trim, along with low shift over temperature and supply
voltage, gives a very robust design over a wide range of operating
conditions. System power may be further reduced by using the
optional disable control pin. Leaving this disable pin open, or holding
it HIGH, gives normal operation. If pulled LOW, the OPA683 supply
current drops to less than 100碌A while the I/O pins go to a high
impedance state.
V+
OPA683 BANDWIDTH vs GAIN
9
6
+
V
O
Normalized Gain (dB)
3
0
鈥?
鈥?
鈥?
鈥?2
鈥?5
鈥?8
鈥?1
1
R
F
= 1.2k鈩?/div>
G = 10
G = 20
G = 50
G = 100
10
Frequency (MHz)
G=2
G=5
V鈥?/div>
I
ERR
R
F
Z
(S)
I
ERR
R
G
100
200
Low-Power
Patent Pending
Amplifier
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 漏 2001, Texas Instruments Incorporated
www.ti.com

OPA683ID 產(chǎn)品屬性

  • 75

  • 集成電路 (IC)

  • Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

  • -

  • 電流反饋

  • 1

  • -

  • 540 V/µs

  • 1.44GHz

  • 200MHz

  • 3µA

  • 1500µV

  • 940µA

  • 150mA

  • 5 V ~ 12 V，±2.5 V ~ 6 V

  • -40°C ~ 85°C

  • 表面貼裝

  • 8-SOIC（0.154"，3.90mm 寬）

  • 8-SOIC

  • 管件

  • 296-19589-ND - PCB DEMO GENERIC FOR 8SOIC OPAMP

  • 296-12854-5

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