- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄5865 > AD620ARZ-REEL (Analog Devices Inc)IC AMP INST LP LN 18MA 8SOIC PDF資料下載
參數(shù)資料
| 型號： | AD620ARZ-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 8/21頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP INST LP LN 18MA 8SOIC |
| 設計資源： | Low Cost Programmable Gain Instrumentation Amplifier Circuit Using ADG1611 and AD620 (CN0146) |
| 標準包裝： | 2,500 |
| 放大器類型： | 儀表 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 1.2 V/µs |
| -3db帶寬： | 1MHz |
| 電流 - 輸入偏壓： | 500pA |
| 電壓 - 輸入偏移： | 30µV |
| 電流 - 電源： | 900µA |
| 電流 - 輸出 / 通道： | 18mA |
| 電壓 - 電源，單路/雙路(±)： | 4.6 V ~ 36 V，±2.3 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） |
| 供應商設備封裝： | 8-SO |
| 包裝： | 帶卷 (TR) |
AD620
Rev. H | Page 15 of 20
Precision V-I Converter
The AD620, along with another op amp and two resistors,
makes a precision current source (Figure 40). The op amp
buffers the reference terminal to maintain good CMR. The
output voltage, VX, of the AD620 appears across R1, which
converts it to a current. This current, less only the input bias
current of the op amp, then flows out to the load.
AD620
RG
–VS
VIN+
VIN–
LOAD
R1
I
L
Vx
I =
L
R1
=
IN+
[(V
) – (V
)] G
IN–
R1
6
5
+ V –
X
4
2
1
8
3
7
+VS
AD705
00775-0-044
Figure 40. Precision Voltage-to-Current Converter (Operates on 1.8 mA, ±3 V)
GAIN SELECTION
The AD620 gain is resistor-programmed by RG, or more
precisely, by whatever impedance appears between Pins 1 and 8.
The AD620 is designed to offer accurate gains using 0.1% to 1%
Note that for G = 1, the RG pins are unconnected (RG = ∞). For
any arbitrary gain, RG can be calculated by using the formula:
1
4
.
49
Ω
=
G
k
R
G
To minimize gain error, avoid high parasitic resistance in series
with RG; to minimize gain drift, RG should have a low TC—less
than 10 ppm/°C—for the best performance.
Table 5. Required Values of Gain Resistors
1% Std Table
Value of RG(Ω)
Calculated
Gain
0.1% Std Table
Value of RG(Ω )
Calculated
Gain
49.9 k
1.990
49.3 k
2.002
12.4 k
4.984
12.4 k
4.984
5.49 k
9.998
5.49 k
9.998
2.61 k
19.93
2.61 k
19.93
1.00 k
50.40
1.01 k
49.91
499
100.0
499
100.0
249
199.4
249
199.4
100
495.0
98.8
501.0
49.9
991.0
49.3
1,003.0
INPUT AND OUTPUT OFFSET VOLTAGE
The low errors of the AD620 are attributed to two sources,
input and output errors. The output error is divided by G when
referred to the input. In practice, the input errors dominate at
high gains, and the output errors dominate at low gains. The
total VOS for a given gain is calculated as
Total Error RTI = input error + (output error/G)
Total Error RTO = (input error × G) + output error
REFERENCE TERMINAL
The reference terminal potential defines the zero output voltage
and is especially useful when the load does not share a precise
ground with the rest of the system. It provides a direct means of
injecting a precise offset to the output, with an allowable range
of 2 V within the supply voltages. Parasitic resistance should be
kept to a minimum for optimum CMR.
INPUT PROTECTION
The AD620 safely withstands an input current of ±60 mA for
several hours at room temperature. This is true for all gains and
power on and off, which is useful if the signal source and
amplifier are powered separately. For longer time periods, the
input current should not exceed 6 mA.
For input voltages beyond the supplies, a protection resistor
should be placed in series with each input to limit the current to
6 mA. These can be the same resistors as those used in the RFI
filter. High values of resistance can impact the noise and AC
CMRR performance of the system. Low leakage diodes (such as
the BAV199) can be placed at the inputs to reduce the required
protection resistance.
AD620
R
REF
R
+SUPPLY
–SUPPLY
VOUT
+IN
–IN
0077
5-
0-
0
52
Figure 41. Diode Protection for Voltages Beyond Supply
RF INTERFERENCE
All instrumentation amplifiers rectify small out of band signals.
The disturbance may appear as a small dc voltage offset. High
frequency signals can be filtered with a low pass R-C network
placed at the input of the instrumentation amplifier. Figure 42
demonstrates such a configuration. The filter limits the input
相關PDF資料 |
PDF描述 |
|---|---|
| 0876.250MXEP | FUSE 250MA 250VAC AXIAL FAST |
| TPC43AHM3/87A | TVS 1.5KW 43V 5% SMPC |
| Y14870R01000B9W | RES .01 OHM 1W .1% FOIL 2512 |
| 929667-04-22-I | CONN HEADER .100 DUAL R/A 44POS |
| 77311-124-14LF | BERGSTIK |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD620ARZ-REEL7 | 功能描述:IC AMP INST LP LN 18MA 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產(chǎn)品培訓模塊:Differential Circuit Design Techniques for Communication Applications 標準包裝:1 系列:- 放大器類型:RF/IF 差分 電路數(shù):1 輸出類型:差分 轉(zhuǎn)換速率:9800 V/µs 增益帶寬積:- -3db帶寬:2.9GHz 電流 - 輸入偏壓:3µA 電壓 - 輸入偏移:- 電流 - 電源:40mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VQFN 裸露焊盤，CSP 供應商設備封裝:16-LFCSP-VQ 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:551 (CN2011-ZH PDF) 其它名稱:ADL5561ACPZ-R7CT |
| AD620ARZ-REEL7-MOOG | 制造商:Analog Devices 功能描述: |
| AD620B | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Cost, Low Power Instrumentation Amplifier |
| AD620BN | 功能描述:IC AMP INST LP LN 18MA 8DIP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝: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） 供應商設備封裝:8-SOIC 包裝:帶卷 (TR) |
| AD620BNZ | 功能描述:IC AMP INST LP LN 18MA 8DIP 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） 供應商設備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
發(fā)布緊急采購，3分鐘左右您將得到回復。