參數資料
| 型號： | AD8221BRZ-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 1/24頁 |
| 文件大小： | 0K |
| 描述： | IC AMP INST PREC LN 18MA 8SOIC |
| 設計資源： | 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) |
| 標準包裝： | 2,500 |
| 放大器類型： | 儀表 |
| 電路數： | 1 |
| 轉換速率： | 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） |
| 供應商設備封裝： | 8-SO |
| 包裝： | 帶卷 (TR) |
Precision Instrumentation Amplifier
AD8221
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2003–2011 Analog Devices, Inc. All rights reserved.
FEATURES
Easy to use
Available in space-saving MSOP
Gain set with 1 external resistor (gain range 1 to 1000)
Wide power supply range: ±2.3 V to ±18 V
Temperature range for specified performance:
40°C to +85°C
Operational up to 125°C1
Excellent AC specifications
80 dB minimum CMRR to 10 kHz (G = 1)
825 kHz, –3 dB bandwidth (G = 1)
2 V/s slew rate
Low noise
8 nV/√Hz, @ 1 kHz, maximum input voltage noise
0.25 V p-p input noise (0.1 Hz to 10 Hz)
High accuracy dc performance (AD8221BR)
90 dB minimum CMRR (G = 1)
25 V maximum input offset voltage
0.3 V/°C maximum input offset drift
0.4 nA maximum input bias current
APPLICATIONS
Weigh scales
Industrial process controls
Bridge amplifiers
Precision data acquisition systems
Medical instrumentation
Strain gages
Transducer interfaces
GENERAL DESCRIPTION
The AD8221 is a gain programmable, high performance
instrumentation amplifier that delivers the industry’s highest
CMRR over frequency in its class. The CMRR of instrumentation
amplifiers on the market today falls off at 200 Hz. In contrast,
the AD8221 maintains a minimum CMRR of 80 dB to 10 kHz
for all grades at G = 1. High CMRR over frequency allows the
AD8221 to reject wideband interference and line harmonics,
greatly simplifying filter requirements. Possible applications
include precision data acquisition, biomedical analysis, and
aerospace instrumentation.
CONNECTION DIAGRAM
8
7
6
5
1
2
3
4
–IN
RG
+VS
VOUT
REF
–VS
+IN
TOP VIEW
AD8221
03149-
001
Figure 1.
40
50
60
70
80
90
CM
RR
(
d
B)
100
110
120
FREQUENCY (Hz)
100
10
1k
10k
100k
03149-
002
AD8221
COMPETITOR 1
COMPETITOR 2
Figure 2. Typical CMRR vs. Frequency for G = 1
Low voltage offset, low offset drift, low gain drift, high gain
accuracy, and high CMRR make this part an excellent choice
in applications that demand the best dc performance possible,
such as bridge signal conditioning.
Programmable gain affords the user design flexibility. A single
resistor sets the gain from 1 to 1000. The AD8221 operates on
both single and dual supplies and is well suited for applications
where ±10 V input voltages are encountered.
The AD8221 is available in a low cost 8-lead SOIC and 8-lead
MSOP, both of which offer the industry’s best performance. The
MSOP requires half the board space of the SOIC, making it ideal
for multichannel or space-constrained applications.
Performance is specified over the entire industrial temperature
range of 40°C to +85°C for all grades. Furthermore, the AD8221
is operational from 40°C to +125°C1.
1 See Typical Performance Characteristics for expected operation from
85°C to 125°C.
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