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PDF AD8271 Data sheet ( Hoja de datos )
| Número de pieza | AD8271 | |
| Descripción | Programmable Gain Precision Difference Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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FEATURES
With no external resistors
Difference amplifier, gains of ½, 1, or 2
Single-ended amplifier: over 40 different gains
Set reference voltage at midsupply
Excellent ac specifications
15 MHz bandwidth
30 V/μs slew rate
High accuracy dc performance
0.08% maximum gain error
10 ppm/°C maximum gain drift
80 dB minimum CMRR (gain of 2)
10-lead MSOP package
Supply current: 2.6 mA
Supply range: ±2.5 V to ±18 V
APPLICATIONS
ADC driver
Instrumentation amplifier building blocks
Level translators
Automatic test equipment
High performance audio
Sine/cosine encoders
GENERAL DESCRIPTION
The AD8271 is a low distortion, precision difference amplifier
with internal gain setting resistors. With no external components,
it can be configured as a high performance difference amplifier
with gains of ½, 1, or 2. It can also be configured in over 40 single-
ended configurations, with gains ranging from −2 to +3.
The AD8271 comes in a 10-lead MSOP package. The AD8271
operates on both single and dual supplies and requires only a
2.6 mA maximum supply current. It is specified over the industrial
temperature range of −40°C to +85°C and is fully RoHS compliant.
For a dual channel version of the AD8271, see the AD8270
data sheet.
Programmable Gain
Precision Difference Amplifier
AD8271
FUNCTIONAL BLOCK DIAGRAM
P1 1
2
P2
P3 3
P4 4
10kΩ
10kΩ
20kΩ
20kΩ
10kΩ
10kΩ
10kΩ
10 N3
9
N2
8 N1
OUT
7
–VS 5
AD8271
Figure 1.
6 +VS
Table 1. Difference Amplifiers by Category
High
Speed
AD8270
AD8273
AD8274
AMP03
High
Voltage
AD628
AD629
Single-Supply
Unidirectional
AD8202
AD8203
Single-Supply
Bidirectional
AD8205
AD8206
AD8216
Rev. 0
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
©2009 Analog Devices, Inc. All rights reserved.
1 page  
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AD8271
VS = ±5 to ±15 V, VREF = 0 V, G = 2, RLOAD = 2 kΩ, TA = 25°C, specifications referred to input (RTI), unless otherwise noted.
Table 4.
Parameter
DYNAMIC PERFORMANCE
Bandwidth
Slew Rate
Settling Time to 0.01%
Settling Time to 0.001%
NOISE/DISTORTION
Harmonic Distortion + Noise
Voltage Noise1
GAIN
Gain Error
Gain Drift
Gain Nonlinearity
INPUT CHARACTERISTICS
Offset2
Average Temperature Drift
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Input Voltage Range3
Common-Mode Resistance4
Bias Current
OUTPUT CHARACTERISTICS
Output Swing
Short-Circuit Current Limit
POWER SUPPLY
Supply Current
Conditions
VS = ±15, 10 V step on output
VS = ±5, 5 V step on output
VS = ±15, 10 V step on output
VS = ±5, 5 V step on output
VS = ±15, f = 1 kHz,
VOUT = 10 V p-p, RLOAD = 600 Ω
VS = ±5, f = 1 kHz,
VOUT = 10 V p-p, RLOAD = 600 Ω
f = 0.1 Hz to 10 Hz
f = 1 kHz
VOUT = 10 V p-p
TA = −40°C to +85°C
VOUT = 10 V p-p,
RLOAD = 10 kΩ, 2 kΩ, 600 Ω
TA = −40°C to +85°C
DC to 1 kHz
Inputs grounded
VS = ±15
VS = ±15, TA = −40°C to +85°C
VS = ±5
VS = ±5, TA = −40°C to +85°C
Sourcing
Sinking
TA = −40°C to +85°C
B Grade
Min Typ Max
10
30
700 800
550 650
750 900
600 750
86
112
1
26
0.04
0.5 2
50
A Grade
Min Typ Max
10
30
700 800
550 650
750 900
600 750
86
112
1
26
0.08
1 10
50
Unit
MHz
V/μs
ns
ns
ns
ns
dB
dB
μV p-p
nV/√Hz
%
ppm/°C
ppm
84
−VS − 0.4
225
1.5
98
2
7.5
500
10
+VS + 0.4
500
78
−VS − 0.4
225
1.5
98
2
7.5
750
10
+VS + 0.4
500
μV
μV/°C
dB
μV/V
V
kΩ
nA
−13.8
−13.7
−4
−3.9
+13.8
+13.7
+4
+3.9
100
60
−13.8
−13.7
−4
−3.9
+13.8
+13.7
+4
+3.9
100
60
V
V
V
V
mA
mA
2.3 2.6
3.2
2.3 2.6
3.2
mA
mA
1 Includes amplifier voltage and current noise, as well as noise of internal resistors.
2 Includes input bias and offset errors.
3 At voltages beyond the rails, internal ESD diodes begin to turn on. In some configurations, the input voltage range may be limited by the internal op amp (see the
Input Voltage Range section for details).
4 Internal resistors, trimmed to be ratio matched, have ±20% absolute accuracy. Common-mode resistance was calculated with both inputs in parallel. The common-
mode impedance at only one input is 2× the resistance listed.
Rev. 0 | Page 5 of 20
5 Page 
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AD8271
VS = ±15 V, TA = 25°C, difference amplifier configuration, unless otherwise noted.
120
100
ISHORT+
80
60
40
20
0
–20
–40 ISHORT–
–60
–80
–100
–50 –30 –10
10 30 50 70
TEMPERATURE (°C)
90 110
Figure 22. Short-Circuit Current vs. Temperature
130
VS = ±15V
100pF
0pF 18pF
1µs/DIV
Figure 25. Small-Signal Step Response, Gain = ½
+VS +125°C
+VS – 2
+VS – 4
–40°C
+25°C +85°C
0
–VS + 4
+125°C
+85°C
+25°C
–VS + 2
–40°C
–VS
200
1k
RLOAD (Ω)
Figure 23. Output Voltage Swing vs. RLOAD
10k
VS = ±15V
220pF
0pF 33pF
1µs/DIV
Figure 26. Small-Signal Step Response, Gain = 1
+VS
+VS – 3
–40°C
+25°C
+VS – 6
0
+125°C
+85°C
–VS + 6
–VS + 3
+125°C
+85°C
+25°C
–VS
0
–40°C
20 40 60 80
CURRENT (mA)
Figure 24. Output Voltage Swing vs. Current (IOUT)
100
VS = ±15V
470pF
0pF 100pF
1µs/DIV
Figure 27. Small-Signal Step Response, Gain = 2
Rev. 0 | Page 11 of 20
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet AD8271.PDF ] | |
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