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參數(shù)資料
| 型號： | LT1807IS8 |
| 元件分類： | 運算放大器 |
| 英文描述： | Voltage-Feedback Operational Amplifier |
| 中文描述： | 電壓反饋運算放大器 |
| 文件頁數(shù)： | 17/24頁 |
| 文件大小： | 314K |
| 代理商： | LT1807IS8 |
LT1806/LT1807
17
TYPICAL APPLICATIO S
Driving A/D Converter
The LT1806/LT1807 have 60ns settling time to 0.01% on
a 2V step signal, and 20
output impedance at 100MHz,
that makes them ideal for driving high speed A/D convert-
ers. With the rail-to-rail input and output, and low supply
voltage operation, the LT1806/LT1807 are also desirable
for single supply applications. As shown in the application
on the front page of this data sheet, the LT1807 drives a
10Msps, 12-bit, LTC1420 ADC in a gain of 20. Driving the
LTC1420 differentially will optimize the signal-to-noise
ratio, SNR, and the total harmonic distortion, THD, of the
A/D converter. The lowpass filter, R5, R6 and C3 reduce
noise or distortion products that might come from the
input signal. High quality capacitors and resistors, NPO
chip capacitor and metal film surface mount resistors,
should be used since these components can add to
distortion. The voltage glitch of the converter, due to its
sampling nature is buffered by the LT1807, and the ability
of the amplifier to settle it quickly will affect the spurious
free dynamic range of the system. Figure 2 depicts the
LT1806 driving LTC1420 at noninverting gain of 2 con-
figuration. The FFT responses show a better than 92dB of
spurious free dynamic range, SFDR.
–
+
LT1806
LTC1420
PGA GAIN = 1
REF = 2.048V
5V
5V
12 BITS
10Msps
–5V
–5V
R2
1k
R1
1k
V
IN
1.5V
P-P
C1
470pF
–A
IN
18067 F02
+A
IN
R3
49.9
Figure 2. Noninverting A/D Driver
FREQUENCY (MHz)
0
–120
A
–100
–80
–60
–40
–20
0
1
2
3
4
18067 F03
5
V
S
=
±
5V
A
V
= 2
f
SAMPLE
= 10Msps
f
IN
SFDR = 92.5dB
Figure 3. 4096 Point FFT Response
SHDN Pin
The LT1806 has a SHDN pin to reduce the supply current
to less than 0.9mA. When the SHDN pin is pulled low, it will
generate a signal to power down the device. If the pin is left
unconnected, an internal pull-up resistor of 40k will keep
the part fully operating as shown in Figure 1. The output
will be high impedance during shutdown, and the turn-on
and turn-off time is less than 100ns. Because the input is
protected by a pair of back to back diodes, the input signal
will feed through to the output during shutdown mode if
the amplitude of signal between the inputs is larger than
1.4V.
APPLICATIOU
W
U
U
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1807IS8#PBF | 功能描述:IC OPAMP R-R I/O DUAL LN 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| LT1807IS8#TR | 功能描述:IC OPAMP R-R I/O DUAL LN 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:1 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.028 V/µs 增益帶寬積:105kHz -3db帶寬:- 電流 - 輸入偏壓:3nA 電壓 - 輸入偏移:100µV 電流 - 電源:3.3µA 電流 - 輸出 / 通道:12mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設(shè)備封裝:14-TSSOP 包裝:剪切帶 (CT) 其它名稱:OP481GRUZ-REELCT |
| LT1807IS8#TRPBF | 功能描述:IC OPAMP R-R I/O DUAL LN 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:1 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.028 V/µs 增益帶寬積:105kHz -3db帶寬:- 電流 - 輸入偏壓:3nA 電壓 - 輸入偏移:100µV 電流 - 電源:3.3µA 電流 - 輸出 / 通道:12mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設(shè)備封裝:14-TSSOP 包裝:剪切帶 (CT) 其它名稱:OP481GRUZ-REELCT |
| LT1807IS8PBF | 制造商:Linear Technology 功能描述:Op Amp Dual Prec. Low Noise RRI/O SOIC8 |
| LT1807IS8-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:325MHz, Single/Dual,Rail-to-Rail Input and Output, Low Distortion,Low Noise Precision Op Amps |
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