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參數(shù)資料
型號: SMP04EP
廠商: Analog Devices Inc
文件頁數(shù): 4/15頁
文件大小: 0K
描述: IC AMP SAMPLE HOLD CMOS 16DIP
標(biāo)準(zhǔn)包裝: 25
放大器類型: 采樣和保持
電路數(shù): 4
轉(zhuǎn)換速率: 4 V/µs
電流 - 輸入偏壓: 500nA
電壓 - 輸入偏移: 2500µV
電流 - 電源: 4mA
電流 - 輸出 / 通道: 1.2mA
電壓 - 電源,單路/雙路(±): 5 V ~ 12 V,±2.5 V ~ 6 V
工作溫度: -40°C ~ 85°C
安裝類型: 通孔
封裝/外殼: 16-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 16-PDIP
包裝: 管件
–12–
SMP04
REV. D
SAMPLE AND DIFFERENCE AMPLIFIER (Figure 23)
This circuit uses two sample-and-holds to measure the voltage
difference of a signal between two time points, t1 and t2. The
sampled voltages are fed into the differential inputs of the AMP02
instrumentation amplifier. A single resistor RG sets the gain of
this instrumentation amplifier. Using two channels of the
SMP04 in this application has the advantage of matched
sample-and-hold performance, since they are both on the same
chip.
VSS
DGND
VSS
+12V
VDD
1/2 SMP04
AMP02
V1
V2
RG
+12V
–5V OR –12V
VOUT = G(V1–V2)
G =
+1
50k
RG
VIN (0V TO 8V)
S/H (DELAYED)
S/H
V1
V2
t1
t2
td
0
INSTRUMENTATION AMP
Figure 23. Time Delta Sample-and-Difference Measurement
SINGLE SUPPLY, SAMPLING, INSTRUMENTATION
AMPLIFIER (Figure 24)
This application again uses two channels of the SMP04 and an
instrumentation amplifier to provide a sampled difference signal.
The sample-and-hold signals in this circuit are tied together to
sample at the same point in time. The other two parts of the
SMP04 are used as amplifiers by grounding their control lines
so they are always sampling. One section is used to drive a
guard to the common-mode voltage and the other to generate a
+6 V reference to serve as an offset for single supply operation.
+6V REFERENCE
REFERENCE
VOUT
AMP02
1/4
SMP04
1/4
SMP04
1/4
SMP04
1/4
SMP04
0.1 F
GAIN =
50k
RG
+1
RG
50k
+12V
20k
0.01 F
GUARD
DRIVE
S/H
+ INPUT
– INPUT
+12V
Figure 24. +12 V Single Supply Sampling Instrumentation Amplifier with Guard Drive
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