參數(shù)資料
型號(hào)： AD628ARZ-RL
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 11/21頁(yè)
文件大?。?/td> 0K
描述： IC AMP PGA DIFF PREC 8SOIC
標(biāo)準(zhǔn)包裝： 2,500
放大器類(lèi)型： 電流檢測(cè)
電路數(shù)： 1
轉(zhuǎn)換速率： 0.3 V/µs
-3db帶寬： 600kHz
電流 - 輸入偏壓： 1.5nA
電壓 - 輸入偏移： 150µV
電流 - 電源： 1.6mA
電壓 - 電源，單路/雙路(±)： 4.5 V ~ 36 V，±2.25 V ~ 18 V
工作溫度： -40°C ~ 85°C
安裝類(lèi)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)
AD628
Rev. G | Page 18 of 20
CURRENT LOOP RECEIVER
Analog data transmitted on a 4 to 20 mA current loop can be
detected with the receiver shown in Figure 33. The AD628 is an
ideal choice for such a function because the current loop is
driven with a compliance voltage sufficient to stabilize the loop,
and the resultant common-mode voltage often exceeds commonly
used supply voltages. Note that with large shunt values, a resistance
of equal value must be inserted in series with the inverting
input to compensate for an error at the noninverting input.
MONITORING BATTERY VOLTAGES
Figure 34 illustrates how the AD628 is used to monitor a battery
charger. Voltages approximately eight times the power supply
voltage can be applied to the input with no damage. The resistor
divider action is well suited for the measurement of many
power supply applications, such as those found in battery
chargers or similar equipment.
For proper operation, the common-mode voltage must satisfy
the input specifications in Table 1, as well as Equation 2.
6
8
1
4
5
7
2
3
AD628
+15V
+2.5V
9.53k
–15V
10k
0V TO 5V
TO ADC
I = 4 TO 20mA
100k
210k
100k
249
VCM = 15V
10k
249
02
99
2-
0
31
Figure 33. Level Shifter for 4 to 20 mA Current Loop
+IN
–IN
G= +0.1
10k
A1
–IN
100k
VREF
–5V
–IN
A2
OUT
AD628
100k
10k
CHARGING
CIRCUIT
+1.5V
BATTERY
10k
+IN
nVBAT(V)
REXT1
10k
TO ADC
CFILT
RG
02
99
2-
0
32
OTHER
BATTERIES IN
CHARGING
CIRCUIT
+5V
+IN
Figure 34. Battery Voltage Monitor
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AD629AN 功能描述:IC AMP DIFF 25MA LDRIFT 8DIP RoHS:否 類(lèi)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(lèi)型:通用 電路數(shù):1 輸出類(lèi)型:滿(mǎn)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(lèi)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)
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