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參數(shù)資料
| 型號(hào)： | AD620BRZ-RL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Low Cost Low Power Instrumentation Amplifier |
| 中文描述： | INSTRUMENTATION AMPLIFIER, 85 uV OFFSET-MAX, 1 MHz BAND WIDTH, PDSO8 |
| 封裝： | LEAD FREE, MS-021-AA, SOIC-8 |
| 文件頁數(shù)： | 15/20頁 |
| 文件大?。?/td> | 559K |
| 代理商： | AD620BRZ-RL |
AD620
Rev. G | Page 15 of 20
3k
5V
DIGITAL
DATA
OUTPUT
ADC
REF
IN
AGND
20k
10k
20k
AD620B
G = 100
499
1.7mA
0.10mA
0.6mA
MAX
3k
3k
3k
2
1
8
3
7
6
5
4
1.3mA
MAX
AD705
0
Figure 40. A Pressure Monitor Circuit that Operates on a 5 V Single Supply
Pressure Measurement
Although useful in many bridge applications, such as weigh
scales, the AD620 is especially suitable for higher resistance
pressure sensors powered at lower voltages where small size and
low power become more significant.
Figure 40 shows a 3 k pressure transducer bridge powered
from 5 V. In such a circuit, the bridge consumes only 1.7 mA.
Adding the AD620 and a buffered voltage divider allows the
signal to be conditioned for only 3.8 mA of total supply current.
Small size and low cost make the AD620 especially attractive for
voltage output pressure transducers. Since it delivers low noise
and drift, it will also serve applications such as diagnostic
noninvasive blood pressure measurement.
Medical ECG
The low current noise of the AD620 allows its use in ECG
monitors (Figure 41) where high source resistances of 1 M or
higher are not uncommon. The AD620’s low power, low supply
voltage requirements, and space-saving 8-lead mini-DIP and
SOIC package offerings make it an excellent choice for battery-
powered data recorders.
Furthermore, the low bias currents and low current noise,
coupled with the low voltage noise of the AD620, improve the
dynamic range for better performance.
The value of capacitor C1 is chosen to maintain stability of
the right leg drive loop. Proper safeguards, such as isolation,
must be added to this circuit to protect the patient from
possible harm.
G = 7
AD620A
0.03Hz
HIGH-
PASS
FILTER
OUTPUT
1V/mV
+3V
–3V
R
8.25k
24.9k
AD705J
G = 143
C1
1M
R4
10k
R1
24.9k
R2
OUTPUT
AMPLIFIER
PATIENT/CIRCUIT
PROTECTION/ISOLATION
0
Figure 41. A Medical ECG Monitor Circuit
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| AD621AR | Low Drift, Low Power Instrumentation Amplifier |
| AD621B | RE Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 3.3V; Output Voltage (Vdc): 3.3V; Power: 1W; Industry Standard Pinout; 1kVDC & 2kVDC Isolation; UL94V-0 Package Material; Optional Continuous Short Circuit Protected; Fully Encapsulated; Custom Solutions Available; Efficiency to 85% |
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| AD620SQ/883B | 功能描述:儀表放大器 IC LOW POWER IN-AMP IC RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
| AD621 | 制造商:AD 制造商全稱:Analog Devices 功能描述:10 MHz, 20 V/レs, G = 1, 10, 100, 1000 i CMOS㈢ Programmable Gain Instrumentation Amplifier |
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