Figure 5. Voltage Follower wit" />
參數(shù)資料
型號(hào): LT1793IN8
廠商: Linear Technology
文件頁(yè)數(shù): 12/12頁(yè)
文件大?。?/td> 0K
描述: IC OPAMP PREC JFET LONOISE 8DIP
標(biāo)準(zhǔn)包裝: 50
放大器類型: J-FET
電路數(shù): 1
轉(zhuǎn)換速率: 3.4 V/µs
增益帶寬積: 4.2MHz
電流 - 輸入偏壓: 4pA
電壓 - 輸入偏移: 250µV
電流 - 電源: 4.2mA
電壓 - 電源,單路/雙路(±): ±4.5 V ~ 20 V
工作溫度: -40°C ~ 85°C
安裝類型: 通孔
封裝/外殼: 8-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 8-PDIP
包裝: 管件
9
LT1793
U
S
A
O
PPLICATI
WU
U
I FOR ATIO
Input:
±5.2V Sine Wave
LT1793 Output
LT1793 F05a
LT1793 F05b
Figure 5. Voltage Follower with Input Exceeding the Common Mode Range (VS = ±5V)
resulting in a change in voltage dV, which is equal to dQ/CF.
The gain therefore is CF/CS. For unity-gain, the CF should
equal the transducer capacitance plus the input capaci-
tance of the LT1793 and RF should equal RS.
In the noninverting mode example, the transducer current
is converted to a change in voltage by the transducer
capacitance, CS. This voltage is then buffered by the
LT1793 with a gain of 1 + R1/R2. A DC path is provided by
RS, which is either the transducer impedance or an exter-
nal resistor. Since RS is usually several orders of magni-
tude greater than the parallel combination of R1 and R2, RB
is added to balance the DC offset caused by the noninvert-
ing input bias current and RS. The input bias currents,
although small at room temperature, can create significant
errors at higher temperature, especially with transducer
resistances of up to 1000M or more. The optimum value
for RB isdeterminedbyequatingthethermalnoise(4kTRS)
to the current noise (2qIB) times RS2. Solving for RS
results in RB = RS = 2VT/IB (VT = 26mV at 25°C). A parallel
capacitor CB, is used to cancel the phase shift caused by
the op amp input capacitance and RB.
Reduced Power Supply Operation
To take full advantage of a wide input common mode range,
the LT1793 was designed to eliminate phase reversal.
Referring to the photographs in Figure 5, the LT1793 is
shown operating in the follower mode (AV = 1) at ±5V
supplies with the input swinging
±5.2V. The output of the
LT1793 clips cleanly and recovers with no phase reversal.
This has the benefit of preventing lockup in servo systems
and minimizing distortion components.
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參數(shù)描述
LT1793IN8#PBF 功能描述:IC OPAMP PREC JFET LONOISE 8DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源,單路/雙路(±):2.7 V ~ 36 V,±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC(0.154",3.90mm 寬) 供應(yīng)商設(shè)備封裝:8-SO 包裝:帶卷 (TR)
LT1793IS8 功能描述:IC OPAMP PREC JFET LOWNOIS 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:100 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:- 轉(zhuǎn)換速率:0.2 V/µs 增益帶寬積:- -3db帶寬:- 電流 - 輸入偏壓:100pA 電壓 - 輸入偏移:30µV 電流 - 電源:380µA 電流 - 輸出 / 通道:- 電壓 - 電源,單路/雙路(±):±2 V ~ 18 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC(0.154",3.90mm 寬) 供應(yīng)商設(shè)備封裝:8-SO 包裝:管件
LT1793IS8#PBF 功能描述:IC OPAMP PREC JFET LOWNOIS 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:100 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:- 轉(zhuǎn)換速率:0.2 V/µs 增益帶寬積:- -3db帶寬:- 電流 - 輸入偏壓:100pA 電壓 - 輸入偏移:30µV 電流 - 電源:380µA 電流 - 輸出 / 通道:- 電壓 - 電源,單路/雙路(±):±2 V ~ 18 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC(0.154",3.90mm 寬) 供應(yīng)商設(shè)備封裝:8-SO 包裝:管件
LT1793IS8#TR 功能描述:IC OPAMP PREC JFET LONOISE 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:J-FET 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:3.5 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:30pA 電壓 - 輸入偏移:2000µV 電流 - 電源:200µA 電流 - 輸出 / 通道:- 電壓 - 電源,單路/雙路(±):7 V ~ 36 V,±3.5 V ~ 18 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:8-DIP(0.300",7.62mm) 供應(yīng)商設(shè)備封裝:8-PDIP 包裝:管件
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