AD8279ARZ Analog Devices Inc, AD8279ARZ Datasheet

IC AMP DIFF LP 14SOIC

AD8279ARZ

Manufacturer Part Number
AD8279ARZ
Description
IC AMP DIFF LP 14SOIC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD8279ARZ

Amplifier Type
Differential
Number Of Circuits
2
Output Type
Rail-to-Rail
Slew Rate
1.4 V/µs
Gain Bandwidth Product
1MHz
Voltage - Input Offset
50µV
Current - Supply
300µA
Current - Output / Channel
15mA
Voltage - Supply, Single/dual (±)
2 V ~ 36 V, ±2 V ~ 18 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
14-SOIC (3.9mm Width), 14-SOL
No. Of Amplifiers
2
Input Offset Voltage
500µV
Bandwidth
1MHz
Supply Voltage Range
2V To 36V
Supply Current
200µA
Amplifier Case Style
SOIC
No. Of Pins
14
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
-3db Bandwidth
-
Current - Input Bias
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD8279ARZ
Manufacturer:
Vishay
Quantity:
540
Part Number:
AD8279ARZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Company:
Part Number:
AD8279ARZ
Quantity:
150
FEATURES
Wide input range beyond supplies
Rugged input overvoltage protection
Low supply current: 200 μA maximum (per amplifier)
Low power dissipation: 0.5 mW at V
Bandwidth: 1 MHz (G = ½)
CMRR: 80 dB minimum, dc to 20 kHz (G = ½, B Grade)
Low offset voltage drift: ±1 μV/°C maximum (B Grade)
Low gain drift: 1 ppm/°C maximum (B Grade)
Enhanced slew rate: 1.4 V/μs
Wide power supply range
8-lead SOIC, 14-lead SOIC, and 8-lead MSOP packages
APPLICATIONS
Voltage measurement and monitoring
Current measurement and monitoring
Instrumentation amplifier building block
Portable, battery-powered equipment
Test and measurement
GENERAL DESCRIPTION
The AD8278 and AD8279 are general-purpose difference
amplifiers intended for precision signal conditioning in power
critical applications that require both high performance and low
power. The AD8278 and AD8279 provide exceptional common-
mode rejection ratio (80 dB) and high bandwidth while amplifying
input signals that are well beyond the supply rails. The on-chip
resistors are laser trimmed for excellent gain accuracy and high
CMRR. They also have extremely low gain drift vs. temperature.
The common-mode range of the amplifier extends to almost
triple the supply voltage (for G = ½), making the amplifer ideal
for single-supply applications that require a high common-
mode voltage range. The internal resistors and ESD circuitry at
the inputs also provide overvoltage protection to the op amp.
The AD8278 and AD8279 can be used as difference amplifiers with
G = ½ or G = 2. They can also be connected in a high precision,
single-ended configuration for non inverting and inverting gains of
−½, −2, +3, +2, +1½, +1, or +½. The AD8278 and AD8279
provide an integrated precision solution that has a smaller size,
lower cost, and better performance than a discrete alternative.
The AD8278 and AD8279 operate on single supplies (2.0 V to 36 V)
or dual supplies (±2 V to ±18 V). The maximum quiescent supply
current is 200 μA, which is ideal for battery-operated and portable
systems. For unity-gain difference amplifiers with similar
performance, refer to the
Rev. C
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.
Trademarks and registered trademarks are the property of their respective owners.
Single supply: 2 V to 36 V
Dual supplies: ±2 V to ±18 V
AD8276
and
S
= 2.5 V
AD8277
data sheets.
Low Cost Difference Amplifiers, G = ½, 2
Low Power, Wide Supply Range,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Table 1. Difference Amplifiers by Category
Low
Distortion
AD8270
AD8271
AD8273
AD8274
AMP03
1
The AD8278 is available in the space-saving 8-lead MSOP and
SOIC packages, and the AD8279 is offered in a 14-lead SOIC
package. Both are specified for performance over the industrial
temperature range of −40°C to +85°C and are fully RoHS
compliant.
U = unidirectional, B = bidirectional.
FUNCTIONAL BLOCK DIAGRAMS
+INA
+INB
–INA
–INB
–IN
+IN
High Voltage
AD628
AD629
2
3
©2009–2011 Analog Devices, Inc. All rights reserved.
2
3
6
5
40kΩ
40kΩ
40kΩ
40kΩ
40kΩ
40kΩ
Figure 1. AD8278
Figure 2. AD8279
+VS
–VS
+VS
–VS
7
4
AD8278/AD8279
11
4
Current Sensing
AD8202
AD8203
AD8205
AD8206
AD8216
AD8278
AD8279
20kΩ
20kΩ
20kΩ
20kΩ
20kΩ
20kΩ
(U)
(U)
(B)
(B)
(B)
5
6
1
12
13
14
10
9
8
SENSE
OUT
REF
SENSEA
OUTA
REFA
SENSEB
OUTB
REFB
1
www.analog.com
Low Power
AD8276
AD8277

Related parts for AD8279ARZ

AD8279ARZ Summary of contents

Page 1

FEATURES Wide input range beyond supplies Rugged input overvoltage protection Low supply current: 200 μA maximum (per amplifier) Low power dissipation Bandwidth: 1 MHz (G = ½) CMRR minimum, dc ...

Page 2

AD8278/AD8279 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagrams............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 7 Thermal Resistance ...................................................................... 7 Maximum Power Dissipation ..................................................... 7 Short-Circuit Current .................................................................. 7 ...

Page 3

SPECIFICATIONS V = ± ± 25° REF A otherwise noted. Table 2. Parameter Conditions INPUT CHARACTERISTICS System Offset 1 Over Temperature T = −40°C to +85°C A vs. Power ...

Page 4

AD8278/AD8279 V = ± ± 25° REF A otherwise noted. Table 3. Parameter Conditions INPUT CHARACTERISTICS 1 System Offset Over Temperature T = −40°C to +85°C A vs. Power ...

Page 5

<± midsupply REF otherwise noted. Table 4. Parameter Conditions INPUT CHARACTERISTICS 1 System Offset Over Temperature T = −40°C to +85°C A vs. Power Supply V = ± ...

Page 6

AD8278/AD8279 <± midsupply REF otherwise noted. Table 5. Parameter Conditions INPUT CHARACTERISTICS 1 System Offset Over Temperature T = −40°C to +85°C A vs. Power Supply V = ±5 V ...

Page 7

ABSOLUTE MAXIMUM RATINGS Table 6. Parameter Supply Voltage Maximum Voltage at Any Input Pin Minimum Voltage at Any Input Pin Storage Temperature Range Specified Temperature Range Package Glass Transition Temperature (T Stresses above those listed under Absolute Maximum Ratings may ...

Page 8

AD8278/AD8279 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS REF AD8278 –IN + TOP VIEW +IN OUT 3 6 (Not to Scale) –VS SENSE CONNECT Figure 4. MSOP Pin Configuration Table 8. AD8278 ...

Page 9

TYPICAL PERFORMANCE CHARACTERISTICS V = ± 25° kΩ connected to ground ½ difference amplifier configuration, unless otherwise noted 600 500 400 300 200 100 0 –150 –100 –50 0 ...

Page 10

AD8278/AD8279 2.7V S –2 –4 –6 –8 –10 –0.5 0.5 1.5 2.5 OUTPUT VOLTAGE (V) Figure 13. Input Common-Mode Voltage vs. Output Voltage and 2.7 V ...

Page 11

GAIN = GAIN = ½ –6 –12 –18 –24 –30 –36 100 1k 10k 100k FREQUENCY (Hz) Figure 19. Gain vs. Frequency, +2.7 V Single Supply 120 GAIN = 2 100 GAIN = ½ 80 ...

Page 12

AD8278/AD8279 +V S –0.5 –1.0 –1.5 –2.0 +2.0 +1.5 +1.0 +0.5 – OUTPUT CURRENT (mA) Figure 25. Output Voltage Swing vs. I and Temperature, V OUT 180 170 160 150 140 130 ...

Page 13

OUTPUT VOLTAGE (V) Figure 31. Gain Nonlinearity ± –4 –8 ...

Page 14

AD8278/AD8279 10µs/DIV Figure 37. Large Signal Step Response ½ 10µs/DIV Figure 38. Large Signal Step Response ±15V ± 100 1k 10k FREQUENCY ...

Page 15

CAPACITIVE LOAD (pF) Figure 43. Small Signal Overshoot vs. Capacitive Load ± ±5V ±15V 10 ±18V ...

Page 16

AD8278/AD8279 THEORY OF OPERATION CIRCUIT INFORMATION Each channel of the AD8278 and AD8279 consists of a low power, low noise op amp and four laser-trimmed on-chip resistors. These resistors can be externally connected to make a variety of amplifier configurations, ...

Page 17

POWER SUPPLIES The AD8278 and AD8279 operate extremely well over a very wide range of supply voltages. They can operate on a single supply as low and as high under appropriate setup conditions. For ...

Page 18

AD8278/AD8279 APPLICATIONS INFORMATION CONFIGURATIONS The AD8278 and AD8279 can be configured in several ways (see Figure 51 to Figure 57). These configurations have excellent gain accuracy and gain drift because they rely on the internal matched resistors. Note that Figure ...

Page 19

The reference must be driven with a low impedance source to maintain the internal resistor ratio. An example using the low power, low noise OP1177 as a reference is shown in Figure 58. INCORRECT CORRECT AD8278 REF ...

Page 20

AD8278/AD8279 OUTLINE DIMENSIONS 0.25 (0.0098) 0.10 (0.0040) COPLANARITY IDENTIFIER 5.00 (0.1968) 4.80 (0.1890 6.20 (0.2441) 4.00 (0.1574) 1 5.80 (0.2284) 3.80 (0.1497) 4 1.27 (0.0500) BSC 1.75 (0.0688) 1.35 (0.0532) 8° 0° 0.51 (0.0201) 0.10 0.31 (0.0122) 0.25 ...

Page 21

... AD8278BRMZ-R7 −40°C to +85°C AD8278BRMZ-RL −40°C to +85°C AD8279ARZ −40°C to +85°C AD8279ARZ-R7 −40°C to +85°C AD8279ARZ-RL −40°C to +85°C AD8279BRZ −40°C to +85°C AD8279BRZ-R7 −40°C to +85°C AD8279BRZ-RL −40°C to +85° RoHS Compliant Part ...

Page 22

AD8278/AD8279 NOTES Rev Page ...

Page 23

NOTES Rev Page AD8278/AD8279 ...

Page 24

AD8278/AD8279 NOTES ©2009–2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D08308-0-1/11(C) Rev Page ...

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