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參數資料
| 型號： | OPA847IDR |
| 英文描述： | Wideband, Ultra-Low Noise, Voltage-Feedback |
| 中文描述： | 寬帶，超低噪聲，電壓反饋 |
| 文件頁數： | 1/23頁 |
| 文件大小： | 529K |
| 代理商： | OPA847IDR |
Wideband, Ultra-Low Noise, Voltage-Feedback
OPERATIONAL AMPLIFIER with Shutdown
APPLICATIONS
z
HIGH DYNAMIC RANGE ADC PREAMPS
z
LOW NOISE, WIDEBAND, TRANSIMPEDANCE
AMPLIFIERS
z
WIDEBAND, HIGH GAIN AMPLIFIERS
z
LOW NOISE DIFFERENTIAL RECEIVERS
z
ULTRASOUND CHANNEL AMPLIFIERS
z
IMPROVED UPGRADE FOR THE OPA687,
CLC425, AND LMH6624
FEATURES
z
HIGH GAIN BANDWIDTH: 3.9GHz
z
LOW INPUT VOLTAGE NOISE: 0.85nV/
√
Hz
z
VERY LOW DISTORTION: –105dBc (5MHz)
z
HIGH SLEW RATE: 950V/μs
z
HIGH DC ACCURACY: V
IO
< ±100μV
z
LOW SUPPLY CURRENT: 18.1mA
z
LOW SHUTDOWN POWER: 2mW
z
STABLE FOR GAINS
≥
12
Ultra-High Dynamic Range
Differential ADC Driver
DESCRIPTION
The OPA847 combines very high gain bandwidth and large
signal performance with an ultra-low input noise voltage
(0.85nV/
√
Hz
) 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.
OPA847
SBOS251C – JULY 2002 – REVISED OCTOBER 2003
www.ti.com
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.
Copyright 2002-2003, Texas Instruments Incorporated
+5V
–5V
OPA847
+5V
+5V
–5V
850
39pF
OPA847
1.7pF
100pF
V
IN
+
V
IN
–
0.1
μ
F
1.7pF
850
39pF
100
20
2k
2k
20
0.001
μ
F
0.001
μ
F
1:2
50
Source
< 5.1dB
Noise
Figure
ADS5421
14-Bit
40MSPS
100
100pF
V
CM
24.6dB Gain
Frequency (MHz)
DIFFERENTIAL OPA847 DRIVER DISTORTION
H
10
–70
–75
–80
–85
–90
–95
–100
–105
–110
20
30
40
50
2V
PP
, at converter input.
2nd-Harmonic
3rd-Harmonic
OPA847
OPA847 RELATED PRODUCTS
INPUT NOISE
VOLTAGE (nV/
√
Hz
)
2.6
2.0
1.2
GAIN BANDWIDTH
PRODUCT (MHz)
200
800
1750
SINGLES
OPA842
OPA843
OPA846
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.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| OPA847IDRG4 | 功能描述:高速運算放大器 Wdebnd Ult-Lo Noise Voltage Feedback RoHS:否 制造商:Texas Instruments 通道數量:1 電壓增益 dB:116 dB 輸入補償電壓:0.5 mV 轉換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| OPA8509 | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Infrared LED Chip |
| OPA8510HPR | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Infrared LED Chip |
| OPA8512 | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Infrared LED Chip |
| OPA8512CND | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Infrared LED Chip |
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