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參數資料
型號: THS4601IDDARG3
廠商: TEXAS INSTRUMENTS INC
元件分類: 音頻/視頻放大
英文描述: 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
封裝: GREEN, PLASTIC, SOP-8
文件頁數: 5/34頁
文件大?。?/td> 826K
代理商: THS4601IDDARG3
THS4601
SLOS388B OCTOBER 2001 REVISED JUNE 2002
13
www.ti.com
APPLICATION INFORMATION
designing the transimpedance circuit (continued)
As indicated, the current source typically sets the requirements for gain, speed, and dynamic range of the
amplifier. For a given amplifier and source combination, achievable performance is dictated by the following
parameters: the amplifier’s gain-bandwidth product, the amplifier’s input capacitance, the source capacitance,
the transimpedance gain, the amplifier’s slew rate, and the amplifier’s output swing. From this information, the
optimal performance of a transimpedance circuit using a given amplifier can be determined. Optimal is defined
here as providing the required transimpedance gain with a maximally flat frequency response.
For the circuit shown in Figure 26, all but one of the design parameters is known; the feedback capacitor must
be determined. Proper selection of the feedback capacitor prevents an unstable design, controls pulse
response characteristics, provides maximally flat transimpedance bandwidth, and limits broadband integrated
noise. The maximally flat frequency response results with CF calculated as shown in equation 1, where CF is
the feedback capacitor, RF is the feedback resistor, CS is the total source capacitance (including amplifier input
capacitance and parasitic capacitance at the inverting node), and GBP is the gain-bandwidth product of the
amplifier in hertz.
C
F +
1
pR
F
GBP
)
1
pR
F
GBP
2
)
4C
S
pR
F
GBP
2
Once the optimal feedback capacitor has been selected, the transimpedance bandwidth can be calculated with
equation 2.
F
–3 dB +
GBP
2
pR
F CS )
C
F
_
+
CIDIFF
CICM
CP
RF
CF
CD
IDIODE
NOTE: The total source capacitance is the sum of several distinct capacitances.
Cs = CICM + CIDIFF + CP + CD
Where: CICM is the common-mode input capacitance.
CIDIFF is the differential input capacitance.
CD is the diode capacitance.
CP is parasitic capacitance at the inverting node.
Figure 27. Transimpedance Analysis Circuit
(1)
(2)
相關PDF資料
PDF描述
THS4601IDG4 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4601CDDAR 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4601CDDA 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4601CDR 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4601CD 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
相關代理商/技術參數
參數描述
THS4601IDG4 功能描述:高速運算放大器 Wideband FET-Input Op Amp 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
THS4601MUV 制造商:Texas Instruments 功能描述:EVALUATION PART 10PIN CERAMIC FLATPACK - Rail/Tube
THS4631 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH-VOLTAGE, HIGH SLEW RATE, WIDEBAND FET-INPUT OPERATIONAL AMPLIFIER
THS4631D 功能描述:高速運算放大器 High Speed FET-Input Op Amp 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
THS4631D 制造商:Texas Instruments 功能描述:OP AMP 325MHZ 1000V/US 8SOI 制造商:Texas Instruments 功能描述:IC HIGH SPEED OP-AMP ((NW))
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