Precision Instrumentation Amplifier
AD8221
CONNECTION DIAGRAM
FEATURES
Available in space-saving MSOP package
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
1
2
3
4
8
7
6
5
+V
–IN
S
R
R
V
OUT
G
G
REF
–V
+IN
S
AD8221
TOP VIEW
Operational up to 125°C1
EXCELLENT AC SPECIFICATONS
80 dB min CMRR to 10 kHz ( G = 1)
825 kHz –3 dB bandwidth (G = 1)
2 V/µs slew rate
Figure 1. SOIC and MSOP Connection Diagram
LOW NOISE
120
110
100
90
8 nV/√Hz, @ 1 kHz, max input voltage noise
0.25 µV p-p input noise (0.1 Hz to 10 Hz)
HIGH ACCURACY DC PERFORMANCE (AD8221BR)
90 dB min CMRR (G = 1)
25 µV max input offset voltage
0.3 µV/°C max input offset drift
0.4 nA max input bias current
AD8221
COMPETITOR 1
80
70
APPLICATIONS
Weigh scales
60
COMPETITOR 2
Industrial process controls
Bridge amplifiers
50
40
Precision data acquisition systems
Medical instrumentation
Strain gages
10
100
1k
10k
100k
FREQUENCY (Hz)
Figure 2. Typical CMRR vs. Frequency for G = 1
Transducer interfaces
GENERAL DESCRIPTION
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 a gain programmable, high performance instru-
mentation amplifier that delivers the industry’s highest CMRR
over frequency. 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.
The AD8221 is available in low cost 8-lead SOIC and MSOP
packages, 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.
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.
1 See Typical Performance Curves for expected operation from 85°C to 125°C.
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
www.analog.com
© 2003 Analog Devices, Inc. All rights reserved.
5秒后页面跳转
MAX487芯片引脚图及功能、应用领域详解
IR2110驱动芯片引脚图及功能、电路图详解
74LS74是什么芯片 74LS74引脚图及功能表
CD4511芯片引脚图及功能、电路图解析
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
