Analog-devices AD620 Manuale Utente
Navigare online o scaricare Manuale Utente per Hardware Analog-devices AD620. Analog Devices AD620 User Manual Manuale Utente
- Pagina / 16
- Indice
- SEGNALIBRI
Valutato. / 5. Basato su recensioni clienti
CONNECTION DIAGRAM
8-Lead Plastic Mini-DIP (N), Cerdip (Q)
and SOIC (R) Packages
–IN
R
G
–V
S
+IN
R
G
+V
S
OUTPUT
REF
1
2
3
4
8
7
6
5
AD620
TOP VIEW
REV. E
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
Low Cost, Low Power
Instrumentation Amplifier
AD620
FEATURES
EASY TO USE
Gain Set with One External Resistor
(Gain Range 1 to 1000)
Wide Power Supply Range (62.3 V to 618 V)
Higher Performance than Three Op Amp IA Designs
Available in 8-Lead DIP and SOIC Packaging
Low Power, 1.3 mA max Supply Current
EXCELLENT DC PERFORMANCE (“B GRADE”)
50 mV max, Input Offset Voltage
0.6 mV/8C max, Input Offset Drift
1.0 nA max, Input Bias Current
100 dB min Common-Mode Rejection Ratio (G = 10)
LOW NOISE
9 nV/√Hz, @ 1 kHz, Input Voltage Noise
0.28 mV p-p Noise (0.1 Hz to 10 Hz)
EXCELLENT AC SPECIFICATIONS
120 kHz Bandwidth (G = 100)
15 ms Settling Time to 0.01%
APPLICATIONS
Weigh Scales
ECG and Medical Instrumentation
Transducer Interface
Data Acquisition Systems
Industrial Process Controls
Battery Powered and Portable Equipment
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 1999
PRODUCT DESCRIPTION
The AD620 is a low cost, high accuracy instrumentation ampli-
fier that requires only one external resistor to set gains of 1 to
0 5 10 15 20
30,000
5,000
10,000
15,000
20,000
25,000
0
TOTAL ERROR, PPM OF FULL SCALE
SUPPLY CURRENT – mA
AD620A
R
G
3 OP-AMP
IN-AMP
(3 OP-07s)
Figure 1. Three Op Amp IA Designs vs. AD620
SOURCE RESISTANCE – V
100M10k1k 10M1M100k
10,000
0.1
100
1,000
10
1
RTI VOLTAGE NOISE
(0.1 – 10Hz) – mV p-p
TYPICAL STANDARD
BIPOLAR INPUT
IN-AMP
AD620 SUPERbETA
BIPOLAR INPUT
IN-AMP
G = 100
Figure 2. Total Voltage Noise vs. Source Resistance
1000. Furthermore, the AD620 features 8-lead SOIC and DIP
packaging that is smaller than discrete designs, and offers lower
power (only 1.3 mA max supply current), making it a good fit
for battery powered, portable (or remote) applications.
The AD620, with its high accuracy of 40 ppm maximum
nonlinearity, low offset voltage of 50 µV max and offset drift of
0.6 µV/°C max, is ideal for use in precision data acquisition
systems, such as weigh scales and transducer interfaces. Fur-
thermore, the low noise, low input bias current, and low power
of the AD620 make it well suited for medical applications such
as ECG and noninvasive blood pressure monitors.
The low input bias current of 1.0 nA max is made possible with
the use of Superβeta processing in the input stage. The AD620
works well as a preamplifier due to its low input voltage noise of
9 nV/√Hz at 1 kHz, 0.28 µV p-p in the 0.1 Hz to 10 Hz band,
0.1 pA/√Hz input current noise. Also, the AD620 is well suited
for multiplexed applications with its settling time of 15 µs to
0.01% and its cost is low enough to enable designs with one in-
amp per channel.
- Low Cost, Low Power 1
- Instrumentation Amplifier 1
- AD620–SPECIFICATIONS 2
- WARNING! 4
- Typical Characteristics 5
- AD620–Typical Characteristics 6
- OUTPUT VOLTAGE – Volts p-p 7
- BW LIMIT 7
- SETTLING TIME – ms 9
- THEORY OF OPERATION 10
- Figure 34. Make vs. Buy 11
- Pressure Measurement 12
- Medical ECG 12
- (Operates on 1.8 mA 13
- COMMON-MODE REJECTION 14
- GROUNDING 14
- Transformer Coupled Inputs 15
- Thermocouple Inputs 15
- OUTLINE DIMENSIONS 16
- Plastic DIP (N-8) Package 16
- Cerdip (Q-8) Package 16
- SOIC (SO-8) Package 16
Sommario
Pagina 1 - Instrumentation Amplifier
CONNECTION DIAGRAM8-Lead Plastic Mini-DIP (N), Cerdip (Q)and SOIC (R) Packages–INRG–VS+INRG+VSOUTPUTREF12348765AD620TOP VIEWREV. EInformation furnishe
Pagina 2 - AD620–SPECIFICATIONS
AD620REV. E–10–VB–VSA1 A2A3C2RGR1R2GAINSENSEGAINSENSER3400V10kV10kVI2I110kVREF10kV+IN– IN20mA20mAR4400VOUTPUTC1Q2Q1Figure 33. Simplified Schematic of
Pagina 3
AD620REV. E–11–Make vs. Buy: A Typical Bridge Application Error BudgetThe AD620 offers improved performance over “homebrew”three op amp IA designs, al
Pagina 4 - WARNING!
AD620REV. E–12–3kV+5VDIGITALDATAOUTPUTADCREFINAGND20kV10kV20kVAD620BG=1001.7mA 0.10mA0.6mAMAX499V3kV3kV3kV218376541.3mAMAXAD705Figure 35. A Pressure M
Pagina 5 - Typical Characteristics
AD620REV. E–13–Precision V-I ConverterThe AD620, along with another op amp and two resistors, makesa precision current source (Figure 37). The op amp
Pagina 6 - AD620–Typical Characteristics
AD620REV. E–14–COMMON-MODE REJECTIONInstrumentation amplifiers like the AD620 offer high CMR,which is a measure of the change in output voltage when b
Pagina 7 - BW LIMIT
AD620REV. E–15–GROUND RETURNS FOR INPUT BIAS CURRENTSInput bias currents are those currents necessary to bias the inputtransistors of an amplifier. Th
Pagina 8
AD620REV. E–16–OUTLINE DIMENSIONSDimensions shown in inches and (mm).Plastic DIP (N-8) Package81450.430 (10.92)0.348 (8.84)0.280 (7.11)0.240 (6.10)PIN
Pagina 9 - SETTLING TIME – ms
AD620–SPECIFICATIONS(Typical @ +258C, VS = 615 V, and RL = 2 kV, unless otherwise noted) AD620A AD620B AD620S1Model Conditions Min Typ Max Min Typ Ma
Pagina 10 - THEORY OF OPERATION
AD620AD620A AD620B AD620S1Model Conditions Min Typ Max Min Typ Max Min Typ Max UnitsDYNAMIC RESPONSESmall Signal –3 dB BandwidthG = 1 1000 1000 1000 k
Pagina 11 - Figure 34. Make vs. Buy
AD620REV. E–4–NOTES1Stresses above those listed under Absolute Maximum Ratings may cause perma-nent damage to the device. This is a stress rating on
Pagina 12 - Medical ECG
AD620REV. E–5–Typical Characteristics(@ +258C, VS = 615 V, RL = 2 kV, unless otherwise noted)INPUT OFFSET VOLTAGE – mV20304050–40 0 +40 +80PERCENTAGE
Pagina 13 - (Operates on 1.8 mA
AD620–Typical Characteristics FREQUENCY – Hz1000100101101000100CURRENT NOISE – fA/!HzFigure 9. Current Noise Spectral Density vs. FrequencyRTI NOISE –
Pagina 14 - GROUNDING
AD620REV. E–7–FREQUENCY – HzPSR – dB1601M80401600.1140100120100k10k1k1001020G = 1000 G = 100G = 10G = 1180Figure 14. Positive PSR vs. Frequency, RTI (
Pagina 15 - Thermocouple Inputs
AD620REV. E–8–OUTPUT VOLTAGE SWING – Volts p-pLOAD RESISTANCE – V300010k2010100 1kVS = 615VG = 10Figure 20. Output Voltage Swing vs. Load Resistance..
Pagina 16 - SOIC (SO-8) Package
AD620REV. E–9–....................Figure 26. Small Signal Pulse Response, G = 100,RL = 2 k
Prodotti e manuali riguardandi Hardware Analog-devices AD620
Hardware Analog-devices BHD930-AG Manuale Utente
(45 pagine)
(45 pagine)
Hardware Analog-devices UG-001 Manuale Utente
(24 pagine)
(24 pagine)
© 2020, manymanuals.it. Tutti i diritti riservati | 0.063 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Commenti su questo manuale