AD620B AD [Analog Devices], AD620B Datasheet

no-image

AD620B

Manufacturer Part Number
AD620B
Description
Low Cost, Low Power Instrumentation Amplifier
Manufacturer
AD [Analog Devices]
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD620BN
Manufacturer:
AD
Quantity:
5 510
Part Number:
AD620BN
Manufacturer:
ICT
Quantity:
5 510
Part Number:
AD620BN
Manufacturer:
ADI
Quantity:
2 991
Part Number:
AD620BN
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
AD620BNZ
Manufacturer:
ADI
Quantity:
1
Part Number:
AD620BNZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
AD620BR
Manufacturer:
ADI
Quantity:
5 510
Part Number:
AD620BR
Manufacturer:
AD
Quantity:
1 000
Part Number:
AD620BR
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
AD620BRZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
AD620BRZ-R7
Manufacturer:
AD
Quantity:
20 000
Part Number:
AD620BRZ-REEL7
Manufacturer:
PANASONIC
Quantity:
12 000
a
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
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.
FEATURES
EASY TO USE
Gain Set with One External Resistor
Wide Power Supply Range ( 2.3 V to
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 V max, Input Offset Voltage
0.6 V/ C 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 V p-p Noise (0.1 Hz to 10 Hz)
EXCELLENT AC SPECIFICATIONS
120 kHz Bandwidth (G = 100)
15 s 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
(Gain Range 1 to 1000)
Figure 1. Three Op Amp IA Designs vs. AD620
30,000
20,000
15,000
10,000
25,000
5,000
0
0
R
AD620A
G
5
SUPPLY CURRENT – mA
10
15
18 V)
3 OP-AMP
(3 OP-07s)
IN-AMP
20
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 V max and offset drift of
0.6 V/ 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 V 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 s to
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
0.01% and its cost is low enough to enable designs with one in-
amp per channel.
Figure 2. Total Voltage Noise vs. Source Resistance
10,000
1,000
100
0.1
10
8-Lead Plastic Mini-DIP (N), Cerdip (Q)
1
1k
Instrumentation Amplifier
CONNECTION DIAGRAM
–V
+IN
–IN
G = 100
R
and SOIC (R) Packages
G
S
10k
World Wide Web Site: http://www.analog.com
Low Cost, Low Power
3
4
1
2
TYPICAL STANDARD
BIPOLAR INPUT
IN-AMP
SOURCE RESISTANCE –
TOP VIEW
AD620
100k
1M
8
6
5
© Analog Devices, Inc., 1999
7
AD620 SUPER ETA
BIPOLAR INPUT
IN-AMP
OUTPUT
REF
R
+V
G
S
AD620
10M
100M

Related parts for AD620B

AD620B Summary of contents

Page 1

FEATURES EASY TO USE Gain Set with One External Resistor (Gain Range 1 to 1000) Wide Power Supply Range ( 2 Higher Performance than Three Op Amp IA Designs Available in 8-Lead DIP and SOIC Packaging Low ...

Page 2

... –V + 1.4 +V – 1.3 – –V + 1.2 +V – 1.4 – –V + 1.6 +V – 1.5 – –2– unless otherwise noted AD620B AD620S Typ Max Min Typ Max 10,000 1 10,000 0.01 0.02 0.03 0.10 0.10 0.15 0.15 0.30 0.10 0.15 0.15 0.30 0.35 0.50 0.40 0. –50 – 125 85 225 ...

Page 3

... See Analog Devices military data sheet for 883B tested specifications. 2 Does not include effects of external resistor One input grounded This is defined as the same supply range which is used to specify PSR. Specifications subject to change without notice. REV. E AD620A AD620B Min Typ Max Min 1000 800 120 12 0.75 1.2 0.75 15 ...

Page 4

... Model V S AD620AN AD620BN AD620AR AD620AR-REEL AD620AR-REEL7 – +85 C AD620BR AD620BR-REEL AD620BR-REEL7 – +85 C AD620ACHIPS AD620SQ/883B *N = Plastic DIP Cerdip Small Outline. METALIZATION PHOTOGRAPH Dimensions shown in inches and (mm). Contact factory for latest dimensions ...

Page 5

Typical Characteristics (@ + SAMPLE SIZE = 360 –80 –40 0 INPUT OFFSET VOLTAGE – V Figure 3. Typical Distribution of Input Offset Voltage 50 SAMPLE SIZE = 850 ...

Page 6

AD620–Typical Characteristics 1000 100 FREQUENCY – Hz Figure 9. Current Noise Spectral Density vs. Frequency TIME – 1 SEC/DIV Figure 10a. 0 RTI Voltage Noise ( TIME – 1 SEC/DIV Figure ...

Page 7

FREQUENCY – Hz Figure 14. Positive PSR vs. Frequency, RTI (G = 1–1000) 180 160 140 120 100 0 100 ...

Page 8

AD620 15V 100 LOAD RESISTANCE – Figure 20. Output Voltage Swing vs. Load Resistance . . . . . . . . . . . . . . . ...

Page 9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 10

AD620 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 11

Make vs. Buy: A Typical Bridge Application Error Budget The AD620 offers improved performance over “homebrew” three op amp IA designs, along with smaller size, fewer compo- nents and 10× lower supply current. In the typical application, shown in Figure ...

Page 12

... 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 non- invasive blood pressure measurement. PATIENT/CIRCUIT PROTECTION/ISOLATION C1 AD705J 20k AD620B 6 5 10k 20k 0.10mA 1.3mA MAX Medical ECG ...

Page 13

Precision V-I Converter The AD620, along with another op amp and two resistors, makes a precision current source (Figure 37). The op amp buffers the reference terminal to maintain good CMR. The output voltage V of the AD620 appears across ...

Page 14

AD620 COMMON-MODE REJECTION Instrumentation amplifiers like the AD620 offer high CMR, which is a measure of the change in output voltage when both inputs are changed by equal amounts. These specifications are usually given for a full-range input voltage change ...

Page 15

GROUND RETURNS FOR INPUT BIAS CURRENTS Input bias currents are those currents necessary to bias the input transistors of an amplifier. There must be a direct return path for these currents; therefore, when amplifying “floating” input +V S – INPUT ...

Page 16

AD620 0.210 (5.33) 0.160 (4.06) 0.115 (2.93) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). Plastic DIP (N-8) Package 0.430 (10.92) 0.348 (8.84 0.280 (7.11) 0.240 (6.10 0.325 (8.25) 0.300 (7.62) 0.060 (1.52) PIN 1 0.015 ...

Related keywords