- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄5433 > AD8420ARMZ-RL (Analog Devices Inc)IC AMP INSTR RR 2.5KHZ 8MSOP PDF資料下載
參數(shù)資料
| 型號： | AD8420ARMZ-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 14/28頁 |
| 文件大小： | 0K |
| 描述： | IC AMP INSTR RR 2.5KHZ 8MSOP |
| 標準包裝： | 3,000 |
| 放大器類型： | 儀表 |
| 電路數(shù)： | 1 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 1 V/µs |
| -3db帶寬： | 250kHz |
| 電流 - 輸入偏壓： | 20nA |
| 電壓 - 輸入偏移： | 250µV |
| 電流 - 電源： | 85µA |
| 電流 - 輸出 / 通道： | 10mA |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 36 V，±2.7 V ~ 18 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-MSOP |
| 包裝： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁當前第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
Data Sheet
AD8420
Rev. 0 | Page 21 of 28
Reference
LAYOUT
The output voltage of the AD8420 is developed with respect to
the potential on the reference terminal. Take care to tie REF to the
appropriate local ground. The differential voltage at the inputs is
reproduced between the REF and FB pins; therefore, it is important
to set VREF so that the voltage at FB does not exceed the input range.
Common-Mode Rejection Ratio over Frequency
Poor layout can cause some of the common-mode signal to be
converted to a differential signal before reaching the in-amp. This
conversion can occur when the path to the positive input pin
has a different frequency response than the path to the negative
input pin. For best CMRR vs. frequency performance, the input
source impedance and capacitance of each path should be closely
matched. This includes connecting Pin 1 to VS, which matches the
parasitic capacitance and the leakage between the inputs and
adjacent pins. Place additional source resistance in the input
path (for example, for input protection) close to the in-amp inputs
to minimize their interaction with the parasitic capacitance from
the printed circuit board (PCB) traces.
DRIVING THE REFERENCE PIN
Traditional instrumentation amplifier architectures require the
reference pin to be driven with a low impedance source. In these
architectures, impedance at the reference pin degrades both CMRR
and gain accuracy. With the AD8420 architecture, resistance at
the reference pin has no effect on CMRR.
AD8420
+IN
–IN
REF
FB
VOUT
G = 1 +
R2 + RREF
R1
VREF
R1
R2
RREF
09
945
-06
2
Power Supplies
Use a stable dc voltage to power the instrumentation amplifier.
Noise on the supply pins can adversely affect performance. For
more information, see the PSRR performance curves in Figure 24
and Figure 25.
Place a 0.1 μF capacitor as close as possible to each supply pin.
As shown in Figure 62, a 10 μF tantalum capacitor can be used
farther away from the part. This capacitor, which is intended to
be effective at low frequencies, can usually be shared by other
precision integrated circuits. Keep the traces between these
integrated circuits short to minimize interaction of the trace
parasitic inductance with the shared capacitor.
Figure 63. Calculating Gain with Reference Resistance
Resistance at the reference pin does affect the gain of the AD8420,
but if this resistance is constant, the gain setting resistors can be
adjusted to compensate. For example, the AD8420 can be driven
with a voltage divider as shown in Figure 64.
R1
R2
AD8420
+VS
+IN
–IN
0.1F
10F
0.1F
10F
–VS
VOUT
099
45
-060
AD8420
+IN
–IN
REF
FB
VOUT
G = 1 +
R2 + R3
||R4
R1
R2
R3
R4
VS
099
45-
0
63
Figure 64. Using Resistor Divider to Set Reference Voltage
Figure 62. Supply Decoupling, REF, and Output Referred to Local Ground
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TSW-142-06-T-D | CONN HEADER 84POS .100" DL TIN |
| 171505-1 | CONN RING TONG 22-18AWG #4 |
| 89008-116 | 116 METRAL HEADER 5RX4M SIG |
| AD8604DRU-REEL | IC OPAMP QUAD R-R I/O 14-TSSOP |
| 89008-116LF | 116LF METRAL HDR 4MX5R PF |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8420BRMZ | 制造商:AD 制造商全稱:Analog Devices 功能描述:Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier |
| AD8420BRMZ-R7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier |
| AD8420BRMZ-RL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier |
| AD8421 | 制造商:AD 制造商全稱:Analog Devices 功能描述:3 nV/√Hz, Low Power |
| AD8421ARMZ | 功能描述:IC OP AMP INSTRUMENTATION 8MSOP 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(yīng)商設(shè)備封裝:14-TSSOP 包裝:剪切帶 (CT) 其它名稱:OP481GRUZ-REELCT |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。