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參數(shù)資料
| 型號(hào)： | LT1469 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Dual 90MHz, 22V/us 16-Bit Accurate Operational Amplifier |
| 中文描述： | 雙90MHz的，22V/us 16位精度運(yùn)算放大器 |
| 文件頁(yè)數(shù)： | 6/12頁(yè) |
| 文件大小： | 179K |
| 代理商： | LT1469 |
LT1469
6
APPLICATIU
W
U
U
Layout and Passive Components
The LT1469 requires attention to detail in board layout in
order to maximize DC and AC performance. For best AC
results (for example, fast settling time) use a ground
plane, short lead lengths and RF quality bypass capacitors
(0.01
μ
F to 0.1
μ
F) in parallel with low ESR bypass capaci-
tors (1
μ
F to 10
μ
F tantalum). For best DC performance, use
“star” grounding techniques, equalize input trace lengths
and minimize leakage (i.e., 1.5G
of leakage between an
input and a 15V supply will generate 10nA—equal to the
maximum I
B
– specification).
Board leakage can be minimized by encircling the input
circuitry with a guard ring operated at a potential close to
that of the inputs: for inverting configurations tie the ring
to ground, in noninverting connections tie the ring to the
inverting input (note the input capacitance will increase
which may require a compensating capacitor as discussed
below).
Microvolt level error voltages can also be generated in the
external circuitry. Thermocouple effects caused by tem-
perature gradients across dissimilar metals at the con-
tacts to the inputs can exceed the inherent drift of the
amplifier. Air currents over device leads should be mini-
mized, package leads should be short and the two input
leads should be as close together as possible and main-
tained at the same temperature.
The parallel combination of the feedback resistor and gain
setting resistor on the inverting input can combine with
the input capacitance to form a pole which can cause
peaking or even oscillations. For feedback resistors greater
than 2k, a feedback capacitor of value C
F
> R
G
C
IN
F
should be used to cancel the input pole and optimize
dynamic performance. For applications where the DC
noise gain is one, and a large feedback resistor is used, C
F
should be greater than or equal to C
IN
. An example would
be a DAC I-to-V converter as shown on the back page of the
data sheet where the DAC can have many tens of picofar-
ads of output capacitance. Another example would be a
gain of –1 with 5k resistors; a 5pF to 10pF capacitor should
be added across the feedback resistor.
+
–
V
OUT
R
F
C
F
C
IN
1/2 LT1469
V
IN
1469 F01
R
G
Figure 1. Nulling Input Capacitance
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相關(guān)代理商/技術(shù)參數(shù) |
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| LT1469_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 90MHz, 22V/μs 16-Bit Accurate Operational Amplifi er |
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| LT1469ACDF#PBF | 功能描述:IC OPAMP 16BIT DUAL 90MHZ 12-DFN RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:Excalibur™ 放大器類型:J-FET 電路數(shù):1 輸出類型:- 轉(zhuǎn)換速率:45 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:20pA 電壓 - 輸入偏移:490µV 電流 - 電源:1.7mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 38 V，±2.25 V ~ 19 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-SOIC 包裝:帶卷 (TR) |
| LT1469ACDF#TRPBF | 功能描述:IC OPAMP 16BIT DUAL 90MHZ 12-DFN RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:Excalibur™ 放大器類型:J-FET 電路數(shù):1 輸出類型:- 轉(zhuǎn)換速率:45 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:20pA 電壓 - 輸入偏移:490µV 電流 - 電源:1.7mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 38 V，±2.25 V ~ 19 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-SOIC 包裝:帶卷 (TR) |
| LT1469ACDF-2#PBF | 功能描述:IC OPAMP 16BIT DUAL 200MHZ 12DFN RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:Excalibur™ 放大器類型:J-FET 電路數(shù):1 輸出類型:- 轉(zhuǎn)換速率:45 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:20pA 電壓 - 輸入偏移:490µV 電流 - 電源:1.7mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 38 V，±2.25 V ~ 19 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-SOIC 包裝:帶卷 (TR) |