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| 型號： | THS3202DRG4 |
| 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, MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 9/36頁 |
| 文件大?。?/td> | 1118K |
| 代理商： | THS3202DRG4 |
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www.ti.com
SLOS242F – SEPTEMBER 2002 – REVISED JANUARY 2010
APPLICATION INFORMATION
INTRODUCTION
The THS3202 is a high-speed, operational amplifier configured in a current-feedback architecture. The device is
built using Texas Instruments BiCOM-II process, a 15-V, dielectrically isolated, complementary bipolar process
with NPN and PNP transistors possessing fTs of several GHz. This configuration implements an exceptionally
high-performance amplifier that has a wide bandwidth, high slew rate, fast settling time, and low distortion.
RECOMMENDED FEEDBACK AND GAIN RESISTOR VALUES
As with all current-feedback amplifiers, the bandwidth of the THS3202 is an inversely proportional function of the
value of the feedback resistor. The recommended resistors for the optimum frequency response are shown in
Table 1. These should be used as a starting point and once optimum values are found, 1% tolerance resistors
should be used to maintain frequency response characteristics. For most applications, a feedback resistor value
of 750
is recommended—a good compromise between bandwidth and phase margin that yields a very stable
amplifier.
Table 1. Recommended Resistor Values for Optimum Frequency Response
THS3202 RF FOR AC WHEN RLOAD = 100
GAIN
VSUP
PEAKING
RF VALUE
15
Optimum
619
1
±5
Optimum
619
15
Optimum
536
2
±5
Optimum
536
15
Optimum
402
5
±5
Optimum
402
15
Optimum
200
10
±5
Optimum
200
15
Optimum
450
–1
±5
Optimum
450
As shown in Table 1, to maintain the highest bandwidth with an increasing gain, the feedback resistor is reduced.
The advantage of dropping the feedback resistor (and the gain resistor) is that the noise of the system is also
reduced compared to no reduction of these resistor values (see the Noise Calculations section). Thus, keeping
the bandwidth as high as possible maintains very good distortion performance of the amplifier by keeping the
excess loop gain as high as possible.
Care must be taken to not drop these values too low. The amplifier output must drive the feedback resistance
(and gain resistance) and may place a burden on the amplifier. The end result is that distortion may actually
increase due to the low impedance load presented to the amplifier. Careful management of the amplifier
bandwidth and the associated loading effects must be examined by the designer for optimum performance.
Copyright 2002–2010, Texas Instruments Incorporated
17
Product Folder Link(s): THS3202
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| THS3215IRGVT | 功能描述:Differential Amplifier 1 Circuit 16-VQFN (4x4) 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):新產(chǎn)品 放大器類型:差分 電路數(shù):1 輸出類型:- 壓擺率:3000 V/μs 增益帶寬積:- -3db 帶寬:650MHz 電流 - 輸入偏置:4μA 電壓 - 輸入失調(diào):12mV 電流 - 電源:35mA 電流 - 輸出/通道:95mA 電壓 - 電源，單/雙（±）:8 V ~ 15.8 V，±4 V ~ 7.9 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VQFN 裸露焊盤 供應(yīng)商器件封裝:16-VQFN（4x4） 標(biāo)準(zhǔn)包裝:1 |
| THS3217EVM | 功能描述:THS3217 1 - Single Channels per IC Differential Amplifier Evaluation Board 制造商:texas instruments 系列:- 零件狀態(tài):有效 每 IC 通道數(shù):1 - 單 放大器類型:差分 輸出類型:單端 壓擺率:5000 V/μs -3db 帶寬:800MHz 電流 - 輸出/通道:175mA 工作溫度:-40°C ~ 85°C 電流 - 電源（主 IC）:55mA 電壓 - 電源，單/雙（±）:8 V ~ 15.8 V，±4 V ~ 7.9 V 板類型:完全填充 所含物品:板 使用的 IC/零件:THS3217 標(biāo)準(zhǔn)包裝:1 |
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