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PDF AD8273 Data sheet ( Hoja de datos )
| Número de pieza | AD8273 | |
| Descripción | High Precision Difference Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Very Low Distortion, Dual-Channel,
High Precision Difference Amplifier
AD8273
FEATURES
±4000 V HBM ESD
Very low distortion
0.00025% THD + N (20 kHz)
0.0015% THD + N (100 kHz)
Drives 600 Ω loads
Two gain settings
Gain of ½ (−6 dB)
Gain of 2 (+6 dB)
0.05% maximum gain error
10 ppm/°C maximum gain drift
Excellent ac specifications
20 V/μs minimum slew rate
800 ns to 0.01% settling time
High accuracy dc performance
77 dB minimum CMRR
700 μV maximum offset voltage
14-lead SOIC package
Supply current: 2.5 mA maximum per channel
Supply range: ±2.5 V to ±18 V
FUNCTIONAL BLOCK DIAGRAM
+VS
11
12kΩ
2
6kΩ
12
12kΩ
3
12kΩ
6
6kΩ
6kΩ
13
14
10
12kΩ
5
6kΩ
4
–VS
Figure 1.
9
8
APPLICATIONS
ADC drivers
High performance audio
Instrumentation amplifier building blocks
Level translators
Automatic test equipment
Sine/cosine encoders
GENERAL DESCRIPTION
The AD8273 is a low distortion, dual-channel amplifier with
internal gain setting resistors. With no external components, it
can be configured as a high performance difference amplifier
(G = ½ or 2), inverting amplifier (G = ½ or 2), or noninverting
amplifier (G = 1½ or 3).
The AD8273 operates on both single and dual supplies and only
requires 2.5 mA maximum supply current for each amplifier. It
is specified over the industrial temperature range of −40°C to
+85°C and is fully RoHS compliant.
Table 1. Difference Amplifiers by Category
Low
Distortion
AD8270
AD8273
AD8274
AMP03
High
Voltage
AD628
AD629
Single-Supply
Unidirectional
AD8202
AD8203
Single-Supply
Bidirectional
AD8205
AD8206
AD8216
Rev. B
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2008–2010 Analog Devices, Inc. All rights reserved.
1 page  
AD8273
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
Supply Voltage
Output Short-Circuit Current
Voltage at Any Input Pin
Differential Input Voltage
Current into Any Input Pin
Human Body Model (HBM) ESD Rating
Storage Temperature Range
Specified Temperature Range
Thermal Resistance
θJA
θJC
Package Glass Transition Temperature (TG)
Rating
±18 V
Observe
derating curve
40 V
40 V
3 mA
±4000 V
−65°C to +130°C
−40°C to +85°C
105°C/W
36°C/W
150°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
MAXIMUM POWER DISSIPATION
The maximum safe power dissipation for the AD8273 is limited
by the associated rise in junction temperature (TJ) on the die. At
approximately 150°C, which is the glass transition temperature,
the plastic changes its properties. Even temporarily exceeding
this temperature limit may change the stresses that the package
exerts on the die, permanently shifting the parametric performance
of the amplifiers. Exceeding a temperature of 150°C for an
extended period can result in a loss of functionality.
The AD8273 has built-in, short-circuit protection that limits the
output current to approximately 100 mA (see Figure 2 for more
information). While the short-circuit condition itself does not
damage the part, the heat generated by the condition can cause
the part to exceed its maximum junction temperature, with
corresponding negative effects on reliability.
2.0
TθJJAM=A1X05=°1C5/W0°C
1.6
1.2
0.8
0.4
0
–50
–25
0
25 50 75 100 125
AMBIENT TEMPERATURE (°C)
Figure 2. Maximum Power Dissipation vs. Ambient Temperature
ESD CAUTION
Rev. B | Page 4 of 16
5 Page 
AD8273
1µs/DIV
Figure 28. Large Signal Pulse Response, Gain = ½
1µs/DIV
Figure 29. Large Signal Pulse Response, Gain = 2
40
35
30
25
+SR
20
–SR
15
10
5
0
–40 –20
0
20 40 60 80 100 120
TEMPERATURE (°C)
Figure 30. Slew Rate vs. Temperature
0.1
22kHz FILTER
VOUT = 10V p-p
RL = 600Ω
0.01
0.001
GAIN = 2
0.0001
10
GAIN = ½
100 1k
FREQUENCY (Hz)
10k
Figure 31. THD + N vs. Frequency, Filter = 22 kHz
100k
0.1
VOUT = 10V p-p
0.01
0.001
GAIN = 2
GAIN = ½
0.0001
10
100 1k
FREQUENCY (Hz)
10k
100k
Figure 32. THD + N vs. Frequency, Filter = 120 kHz
1
GAIN = ½
f = 1kHz
0.1
0.01 RL = 2kΩ, 100Ω
0.001
RL = 600Ω
0.0001
0
5 10 15
OUTPUT AMPLITUDE (dBu)
20
Figure 33. THD + N vs. Output Amplitude, G = ½
25
Rev. B | Page 10 of 16
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet AD8273.PDF ] | |
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