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參數資料
| 型號： | THS4215DGKR |
| 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, MSOP-8 |
| 文件頁數： | 14/47頁 |
| 文件大小： | 1197K |
| 代理商： | THS4215DGKR |
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_
+
THS4211
49.9
50
Source
VI
+VS
VO
Rf
392
Rg
392
+VS
2
+VS
2
_
+
THS4211
392
50
Source
VI
VS
VO
Rf
392
+VS
2
57.6
Rg
499
RT
499
RT
+VS
2
www.ti.com ................................................................................................................................... SLOS400E – SEPTEMBER 2002 – REVISED SEPTEMBER 2009
SINGLE-SUPPLY OPERATION
Note that this power-down functionality is just that;
the amplifier consumes less power in power-down
The THS4211 is designed to operate from a single
mode. The power-down mode is not intended to
5-V to 15-V power supply. When operating from a
provide a high- impedance output. In other words, the
single power supply, care must be taken to ensure
power-down functionality is not intended to allow use
the input signal and amplifier are biased appropriately
as a 3-state bus driver. When in power-down mode,
to maximize output voltage swing. The circuits shown
the impedance looking back into the output of the
in Figure 77 demonstrate methods to configure an
amplifier is dominated by the feedback and gain
amplifier for single-supply operation.
setting resistors, but the output impedance of the
device itself varies depending on the voltage applied
to the outputs.
The time delays associated with turning the device on
and off are specified as the time it takes for the
amplifier to reach 50% of the nominal quiescent
current. The time delays are on the order of
microseconds because the amplifier moves in and out
of the linear mode of operation in these transitions.
Power-Down Reference Pin Operation
In addition to the power-down pin, the THS4215 also
features a reference pin (REF) which allows the user
to control the enable or disable power-down voltage
levels applied to the PD pin. Operation of the
reference pin as it relates to the power-down pin is
described below.
In most split-supply applications, the reference pin will
be connected to ground. In some cases, the user
may want to connect it to the negative or positive
supply rail. In either case, the user needs to be aware
of the voltage level thresholds that apply to the
power-down pin. The table below illustrates the
relationship between the reference voltage and the
Figure 77. DC-Coupled Single Supply Operation
power-down thresholds.
POWER-DOWN PIN VOLTAGE
Saving Power with Power-Down
REFERENCE
Functionality and Setting Threshold Levels
DEVICE
VOLTAGE
DISABLED
ENABLED
with the Reference Pin
VS– to 0.5 (VS– + VS+)
≤ Ref + 1.0 V
≥ Ref + 1.8 V
The THS4215 features a power-down pin (PD) which
0.5 (VS– + VS+) to VS+
≤ Ref – 1.5 V
≥ Ref – 1 V
lowers the quiescent current from 19-mA down to
650-A, ideal for reducing system power.
The recommended mode of operation is to tie the
The power-down pin of the amplifiers defaults to the
reference pin to mid-rail, thus setting the threshold
positive supply voltage in the absence of an applied
levels to mid-rail +1.0 V and midrail +1.8 V.
voltage, putting the amplifier in the power-on mode of
operation. To conserve power, the amplifier is turned
NO. OF CHANNELS
PACKAGES
off by driving the power-down pin towards the
Single (8-pin)
THS4215D, THS4215DGN, and
negative rail. The threshold voltages for power-on
THS4215DRB
and power-down are relative to the supply rails, and
are given in the specification tables. Above the
Enable Threshold Voltage, the device is on. Below
the Disable Threshold Voltage, the device is off.
Behavior between these threshold voltages is not
specified.
Copyright 2002–2009, Texas Instruments Incorporated
21
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| THS4215DGNG4 | 1 CHANNEL, VIDEO AMPLIFIER, PDSO8 |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| THS4215DGKRG4 | 功能描述:高速運算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed 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 |
| THS4215DGN | 功能描述:高速運算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed 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 |
| THS4215DGNG4 | 功能描述:高速運算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed 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 |
| THS4215DGNR | 功能描述:高速運算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed 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 |
| THS4215DGNRG4 | 功能描述:高速運算放大器 Super-Fast Ultr-Lo- Distortion Hi-Speed 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 |
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