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PDF AD8656 Data sheet ( Hoja de datos )
| Número de pieza | AD8656 | |
| Descripción | (AD8655 / AD8656) Precision CMOS Amplifier | |
| Fabricantes | Analog Devices | |
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Data Sheet
FEATURES
Low noise: 2.7 nV/√Hz at f = 10 kHz
Low offset voltage: 250 µV max over VCM
Offset voltage drift: 0.4 µV/°C typ and 2.3 µV/°C max
Bandwidth: 28 MHz
Rail-to-rail input/output
Unity gain stable
2.7 V to 5.5 V operation
−40°C to +125°C operation
Qualified for automotive applications
APPLICATIONS
ADC and DAC buffers
Audio
Industrial controls
Precision filters
Digital scales
Automotive collision avoidance
PLL filters
GENERAL DESCRIPTION
The AD8655/AD8656 are the industry’s lowest noise, precision
CMOS amplifiers. They leverage the Analog Devices DigiTrim®
technology to achieve high dc accuracy.
The AD8655/AD8656 provide low noise (2.7 nV/√Hz at 10 kHz),
low THD + N (0.0007%), and high precision performance
(250 µV max over VCM) to low voltage applications. The ability
to swing rail-to-rail at the input and output enables designers
to buffer analog-to-digital converters (ADCs) and other wide
dynamic range devices in single-supply systems.
Low Noise,
Precision CMOS Amplifier
AD8655/AD8656
PIN CONFIGURATIONS
NC 1
–IN 2
+IN 3
V– 4
AD8655
TOP VIEW
(Not to Scale)
8 NC
7 V+
6 OUT
5 NC
NC = NO CONNECT
Figure 1. AD8655
8-Lead MSOP (RM-8)
8-Lead SOIC (R-8)
OUT A 1
–IN A 2
+IN A 3
V– 4
AD8656
TOP VIEW
(Not to Scale)
8 V+
7 OUT B
6 –IN B
5 +IN B
Figure 2. AD8656
8-Lead MSOP (RM-8)
8-Lead SOIC (R-8)
The high precision performance of the AD8655/AD8656 improves
the resolution and dynamic range in low voltage applications.
Audio applications, such as microphone pre-amps and audio
mixing consoles, benefit from the low noise, low distortion, and
high output current capability of the AD8655/AD8656 to reduce
system level noise performance and maintain audio fidelity. The
high precision and rail-to-rail input and output of the AD8655/
AD8656 benefit data acquisition, process controls, and PLL
filter applications.
The AD8655/AD8656 are fully specified over the −40°C to
+125°C temperature range. The AD8655/AD8656 are available
in Pb-free, 8-lead MSOP and SOIC packages. The AD8655/
AD8656 are both available for automotive applications.
Rev. E
Document Feedback
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 ©2005–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
Supply Voltage
Input Voltage
Differential Input Voltage
Output Short-Circuit Duration
to GND
Electrostatic Discharge (HBM)
Storage Temperature Range
R, RM Packages
Junction Temperature Range
R, RM Packages
Lead Temperature
(Soldering, 10 sec)
Rating
6V
VSS − 0.3 V to VDD + 0.3 V
±6 V
Indefinite
3.0 kV
−65°C to +150°C
−65°C to +150°C
260°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.
AD8655/AD8656
Table 4.
Package Type
8-Lead MSOP (RM)
8-Lead SOIC (R)
θJA1
θJC
210 45
158 43
Unit
°C/W
°C/W
1 θJA is specified for worst-case conditions; that is, θJA is specified for a device
soldered in the circuit board for surface-mount packages.
ESD CAUTION
Rev. E | Page 5 of 20
5 Page 
Data Sheet
80
VS = ±1.35V
70
60
50
40
30
20
10
0
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4
|TCVOS| (µV/°C)
Figure 33. |TCVOS| Distribution
1.6
4.5
VS = ±1.35V
4.0
3.5
3.0
2.5
2.0
–50
0 50 100
TEMPERATURE (°C)
Figure 34. Supply Current vs. Temperature
150
1400
1200
VS = ±1.35V
1000
800
VOH
600
VOL
400
200
0
0 20 40 60 80 100 120
LOAD CURRENT (mA)
Figure 35. AD8655 Output Voltage to Supply Rail vs. Load Current
AD8655/AD8656
10000
1000
VS = ±1.35V
100
10 VOL
VOH
1
0.1 1
10
CURRENT LOAD (mA)
Figure 36. AD8656 Output Swing vs. Current Load
100
2.698
2.694
VS = ±1.35V
LOAD CURRENT = 1mA
2.690
2.686
2.682
2.678
2.674
–50
0 50 100
TEMPERATURE (°C)
150
Figure 37. Output Voltage Swing High vs. Temperature
14
VS = ±1.35V
LOAD CURRENT = 1mA
12
10
8
6
4
2
–50
0 50 100
TEMPERATURE (°C)
150
Figure 38. Output Voltage Swing Low vs. Temperature
Rev. E | Page 11 of 20
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet AD8656.PDF ] | |
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