- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄3435 > AD8221BR-REEL7 (Analog Devices Inc)IC AMP INST PREC LN 18MA 8SOIC PDF資料下載
參數(shù)資料
| 型號(hào)： | AD8221BR-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 9/24頁(yè) |
| 文件大小： | 0K |
| 描述： | IC AMP INST PREC LN 18MA 8SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Power Line Monitoring Instrument Amp Primer Overview |
| 設(shè)計(jì)資源： | Low Cost, High Voltage, Programmable Gain Instrumentation Amplifier Using AD5292 and AD8221 (CN0114) Low Cost Programmable Gain Instrumentation Amplifier Circuit Using ADG1611 and AD620 (CN0146) |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 放大器類型： | 儀表 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 2 V/µs |
| -3db帶寬： | 825kHz |
| 電流 - 輸入偏壓： | 200pA |
| 電壓 - 輸入偏移： | 25µV |
| 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(yīng)商設(shè)備封裝： | 8-SO |
| 包裝： | 帶卷 (TR) |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)當(dāng)前第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)
AD8221
Rev. C | Page 17 of 24
THEORY OF OPERATION
C1
C2
+VS
+IN
–IN
–VS
10k
10k
10k
400
400
10k
REF
OUTPUT
IB COMPENSATION
+VS
–VS
+VS
–VS
+VS
VB
I
R1
24.7k
24.7k
RG
Q1
R2
Q2
–VS
+VS
–VS
A2
A1
A3
03149-
042
Figure 43. Simplified Schematic
The AD8221 is a monolithic instrumentation amplifier based
on the classic 3-op amp topology. Input transistors Q1 and Q2
are biased at a fixed current so that any differential input signal
forces the output voltages of A1 and A2 to change accordingly.
A signal applied to the input creates a current through RG, R1,
and R2, such that the outputs of A1 and A2 deliver the correct
voltage. Topologically, Q1, A1, R1 and Q2, A2, R2 can be
viewed as precision current feedback amplifiers. The amplified
differential and common-mode signals are applied to a
difference amplifier that rejects the common-mode voltage
but amplifies the differential voltage. The difference amplifier
employs innovations that result in low output offset voltage as
well as low output offset voltage drift. Laser-trimmed resistors
allow for a highly accurate in-amp with gain error typically less
than 20 ppm and CMRR that exceeds 90 dB (G = 1).
Using superbeta input transistors and an IB compensation
scheme, the AD8221 offers extremely high input impedance,
low IB, low IB drift, low IOS, low input bias current noise, and
extremely low voltage noise of 8 nV/√Hz.
The transfer function of the AD8221 is
G
R
G
kΩ
4
.
49
1+
=
Users can easily and accurately set the gain using a single
standard resistor.
Because the input amplifiers employ a current feedback
architecture, the gain-bandwidth product of the AD8221
increases with gain, resulting in a system that does not suffer
from the expected bandwidth loss of voltage feedback
architectures at higher gains.
To maintain precision even at low input levels, special attention
was given to the design and layout of the AD8221, resulting in
an in-amp whose performance satisfies the most demanding
applications.
A unique pinout enables the AD8221 to meet a CMRR
specification of 80 dB at 10 kHz (G = 1) and 110 dB at 1 kHz
(G = 1000). The balanced pinout, shown in Figure 44, reduces
the parasitics that had, in the past, adversely affected CMRR
performance. In addition, the new pinout simplifies board
layout because associated traces are grouped together. For
example, the gain setting resistor pins are adjacent to the
inputs, and the reference pin is next to the output.
8
7
6
5
1
2
3
4
–IN
RG
+VS
VOUT
REF
–VS
+IN
TOP VIEW
AD8221
03149-
043
Figure 44. Pinout Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 170M6411 | FUSE 700A 690V 3BN/50 AR UC |
| MCP601-E/ST | IC OPAMP SNGL 2.7V 8TSSOP |
| LRC-LRF1206LF-01-R020-F | RES .020 OHM 0.5W 1% 1206 SMD |
| MCP6G01-E/SN | IC GAIN BLOCK 1.8V 1CH 8SOIC |
| TSM-107-01-T-DV | CONN HEADER 14POS .100" DBL SMD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8221BRZ | 功能描述:IC AMP INSTRUMENT PREC HP 8SOIC RoHS:是 類別: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(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| AD8221BRZ-R7 | 功能描述:IC AMP INST PREC LN 18MA 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:J-FET 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:13 V/µs 增益帶寬積:3MHz -3db帶寬:- 電流 - 輸入偏壓:65pA 電壓 - 輸入偏移:3000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-PDIP 包裝:管件 |
| AD8221BRZ-RL | 功能描述:IC AMP INST PREC LN 18MA 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:J-FET 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:13 V/µs 增益帶寬積:3MHz -3db帶寬:- 電流 - 輸入偏壓:65pA 電壓 - 輸入偏移:3000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-PDIP 包裝:管件 |
| AD8221-EVAL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision Instrumentation Amplifier |
| AD8221TRMZ-EP | 功能描述:IC OPAMP INSTR 825KHZ 制造商:analog devices inc. 系列:- 包裝:管件 零件狀態(tài):在售 放大器類型:儀表 電路數(shù):1 輸出類型:- 壓擺率:2 V/μs -3db 帶寬:825kHz 電流 - 輸入偏置:2nA 電壓 - 輸入失調(diào):70μV 電流 - 電源:900μA 電流 - 輸出/通道:18mA 電壓 - 電源，單/雙（±）:±2.3 V ~ 18 V 工作溫度:-55°C ~ 125°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)商器件封裝:8-MSOP 標(biāo)準(zhǔn)包裝:50 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。