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OPA847IDR Datasheet

  • OPA847IDR

  • Wideband, Ultra-Low Noise, Voltage-Feedback

  • 23頁

  • BB

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OPA847
OPA
847
SBOS251C 鈥?JULY 2002 鈥?REVISED OCTOBER 2003
Wideband, Ultra-Low Noise, Voltage-Feedback
OPERATIONAL AMPLIFIER with Shutdown
FEATURES
HIGH GAIN BANDWIDTH: 3.9GHz
LOW INPUT VOLTAGE NOISE: 0.85nV/
鈭欻z
VERY LOW DISTORTION: 鈥?05dBc (5MHz)
HIGH SLEW RATE: 950V/碌s
HIGH DC ACCURACY: V
IO
< 鹵100碌V
LOW SUPPLY CURRENT: 18.1mA
LOW SHUTDOWN POWER: 2mW
STABLE FOR GAINS
鈮?/div>
12
DESCRIPTION
The OPA847 combines very high gain bandwidth and large
signal performance with an ultra-low input noise voltage
(0.85nV/鈭欻z) while using only 18mA supply current. Where
power savings is critical, the OPA847 also includes an
optional power shutdown pin that, when pulled low, disables
the amplifier and decreases the supply current to < 1% of the
powered-up value. This optional feature may be left discon-
nected to ensure normal amplifier operation when no power-
down is required.
The combination of very low input voltage and current noise,
along with a 3.9GHz gain bandwidth product, make the
OPA847 an ideal amplifier for wideband transimpedance
applications. As a voltage gain stage, the OPA847 is opti-
mized for a flat frequency response at a gain of +20V/V and
is stable down to gains as low as +12V/V. New external
compensation techniques allow the OPA847 to be used at
any inverting gain with excellent frequency response control.
Using this technique in a differential Analog-to-Digital Con-
verter (ADC) interface application, shown below, can deliver
one of the highest dynamic-range interfaces available.
APPLICATIONS
HIGH DYNAMIC RANGE ADC PREAMPS
LOW NOISE, WIDEBAND, TRANSIMPEDANCE
AMPLIFIERS
WIDEBAND, HIGH GAIN AMPLIFIERS
LOW NOISE DIFFERENTIAL RECEIVERS
ULTRASOUND CHANNEL AMPLIFIERS
IMPROVED UPGRADE FOR THE OPA687,
CLC425, AND LMH6624
OPA847 RELATED PRODUCTS
SINGLES
OPA842
OPA843
OPA846
0.001碌F
100鈩?/div>
OPA847
1.7pF
50鈩?Source
20鈩?/div>
INPUT NOISE
VOLTAGE (nV/
鈭欻z
)
2.6
2.0
1.2
GAIN BANDWIDTH
PRODUCT (MHz)
200
800
1750
+5V
+5V
DIFFERENTIAL OPA847 DRIVER DISTORTION
鈥?0
2k鈩?/div>
850鈩?/div>
V
IN
+
100pF
鈥?V
2V
PP
, at converter input.
鈥?5
Harmonic Distortion (dBc)
1:2
< 5.1dB
Noise
Figure
39pF
39pF
850鈩?/div>
V
CM
ADS5421
14-Bit
40MSPS
0.1碌F
2k鈩?/div>
V
IN
鈥?/div>
100pF
鈥?0
鈥?5
鈥?0
鈥?5
鈥?00
鈥?05
鈥?10
10
20
Frequency (MHz)
30
40
50
3rd-Harmonic
2nd-Harmonic
+5V
100鈩?/div>
OPA847
1.7pF
0.001碌F
20鈩?/div>
鈥?V
24.6dB Gain
Ultra-High Dynamic Range
Differential ADC Driver
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 2002-2003, Texas Instruments Incorporated
www.ti.com

OPA847IDR 產(chǎn)品屬性

  • 2,500

  • 集成電路 (IC)

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

  • -

  • 電壓反饋

  • 1

  • -

  • 950 V/µs

  • 3.9GHz

  • -

  • 19µA

  • 100µV

  • 18.1mA

  • 100mA

  • 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

  • 帶卷 (TR)

  • 296-19716-ND - BOARD DEMO FOR SNGL 8SOIC OPAMPS

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