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PDF AD8647 Data sheet ( Hoja de datos )
| Número de pieza | AD8647 | |
| Descripción | 24 MHz Rail-to-Rail Amplifiers | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
FEATURES
Offset voltage: 2.5 mV maximum
Single-supply operation: 2.7 V to 5.5 V
Low noise: 8 nV/√Hz
Wide bandwidth: 24 MHz
Slew rate: 11 V/μs
Short-circuit output current: 120 mA
Qualified for automotive applications
No phase reversal
Low input bias current: 1 pA
Low supply current per amplifier: 2 mA maximum
Unity gain stable
APPLICATIONS
Battery-powered instruments
Multipole filters
ADC front ends
Sensors
Barcode scanners
ASIC input or output amplifiers
Audio amplifiers
Photodiode amplifiers
Datapath/mux/switch control
GENERAL DESCRIPTION
The AD8646 and the AD8647 are the dual, and the AD8648 is
the quad, rail-to-rail, input and output, single-supply amplifiers
featuring low offset voltage, wide signal bandwidth, low input
voltage, and low current noise. The AD8647 also has a low
power shutdown function.
The combination of 24 MHz bandwidth, low offset, low noise,
and very low input bias current makes these amplifiers useful in
a wide variety of applications. Filters, integrators, photodiode
amplifiers, and high impedance sensors all benefit from the
combination of performance features. AC applications benefit
from the wide bandwidth and low distortion. The AD8646/
24 MHz Rail-to-Rail Amplifiers
with Shutdown Option
AD8646/AD8647/AD8648
PIN CONFIGURATIONS
OUTA 1
8 V+
–INA 2 AD8646 7 OUTB
+INA
3
TOP VIEW
(Not to Scale)
6
–INB
V– 4
5 +INB
Figure 1. 8-Lead SOIC and MSOP
OUTA 1
–INA 2
+INA 3
V– 4
SDA 5
10 V+
AD8647
TOP VIEW
(Not to Scale)
9 OUTB
8 –INB
7 +INB
6 SDB
Figure 2. 10-Lead MSOP
OUTA 1
–INA 2
+INA 3
V+ 4
+INB 5
–INB 6
OUTB 7
AD8648
TOP VIEW
(Not to Scale)
14 OUTD
13 –IND
12 +IND
11 V–
10 +INC
9 –INC
8 OUTC
Figure 3. 14-Lead SOIC and TSSOP
AD8647/AD8648 offer high output drive capability, which is
excellent for audio line drivers and other low impedance
applications. The AD8646 and AD8648 are available for
automotive applications (see the Ordering Guide).
Applications include portable and low powered instrumenta-
tion, audio amplification for portable devices, portable phone
headsets, barcode scanners, and multipole filters. The ability to
swing rail to rail at both the input and output enables designers
to buffer CMOS ADCs, DACs, ASICs, and other wide output
swing devices in single-supply systems.
Rev. F
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 ©2006–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
AD8646/AD8647/AD8648
VSY = 2.7 V, VCM = VSY/2, TA = +25oC, unless otherwise noted.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Offset Voltage Drift
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Input Capacitance
Differential
Common Mode
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
Output Current
Closed-Loop Output Impedance
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current per Amplifier
Supply Current Shutdown Mode
(AD8647 Only)
SHUTDOWN INPUTS (AD8647)
Logic High Voltage (Enabled)
Logic Low Voltage (Power-Down)
Logic Input Current (Per Pin)
Output Pin Leakage Current
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
Settling Time
Amplifier Turn-On Time (AD8647)
Amplifier Turn-Off Time (AD8647)
NOISE PERFORMANCE
Peak-to-Peak Noise
Voltage Noise Density
Channel Separation
Symbol Conditions
VOS
ΔVOS/ΔT
IB
IOS
VCM
CMRR
AVO
VCM = 0 V to 2.7 V
−40°C < TA < +125°C
−40°C < TA < +125°C
−40°C < TA < +85°C
−40°C < TA < +125°C
−40°C < TA < +85°C
−40°C < TA < +125°C
VCM = 0 V to 2.7 V
RL = 2 kΩ, VO = 0.5 V to 2.2 V
CDIFF
CCM
VOH IOUT = 1 mA
−40°C < TA < +125°C
VOL IOUT = 1 mA
−40°C < TA < +125°C
Isc Short circuit
ZOUT At 1 MHz, AV = 1
PSRR
ISY
ISD
VSY = 2.7 V to 5.5 V
−40°C < TA < +125°C
Both amplifiers shut down,
VIN_SDA and VIN_SDB = 0 V
−40°C < TA < +125°C
VINH −40°C < TA < +125°C
VINL −40°C < TA < +125°C
IIN −40°C < TA < +125°C
−40°C < TA < +125°C (shutdown active)
SR RL = 2 kΩ
GBP
Øm
ts To 0.1%
ton 25°C, AV = 1, RL = 1 kΩ (see Figure 41)
toff 25°C, AV = 1, RL = 1 kΩ (see Figure 42)
en p-p
en
CS
0.1 Hz to 10 Hz
f = 1 kHz
f = 10 kHz
f = 10 kHz
f = 100 kHz
Min Typ Max Unit
0.6 2.5 mV
3.2 mV
1.8 7.0 μV/°C
0.2 1
pA
50 pA
550 pA
0.1 0.5 pA
50 pA
250 pA
0 2.7 V
62 79
dB
95 102
dB
2.5 pF
7.8 pF
2.65 2.68
2.60
11
±63
5
25
30
V
V
mV
mV
mA
Ω
63 80
dB
1.6 2.0 mA
2.5 mA
10 nA
1 µA
+2.0
1
V
+0.8 V
1 µA
nA
11 V/μs
24 MHz
53 Degrees
0.3 μs
1.2 μs
1 μs
2.3
8
6
−115
−110
μV
nV/√Hz
nV/√Hz
dB
dB
Rev. F | Page 5 of 18
5 Page 
Data Sheet
VSY = 2.7V, VCM = 1.35V, VIN = 100mV p-p,
TA = 25°C, RL = 10kΩ, CL = 100pF
AD8646/AD8647/AD8648
VSY = 5V, VCM = 2.5V, VIN = 100mV p-p,
TA = 25°C, RL = 10kΩ, CL = 100pF
(200ns/DIV)
Figure 28. Small-Signal Transient Response
VSY = 2.7V, VIN = 2V p-p,
TA = 25°C, RL = 10kΩ, CL = 100pF
(200ns/DIV)
Figure 31. Small-Signal Transient Response
VSY = 5V, VIN = 4V p-p,
TA = 25°C, RL = 10kΩ, CL = 100pF
(200ns/DIV)
Figure 29. Large-Signal Transient Response
0.08
0.07
0.06
VSY = ±2.5V
RL = 600Ω
AV = 1
TA = 25°C
0.05
0.04
0.03
0.02
0.01
0
10 100 1k 10k
FREQUENCY (Hz)
Figure 30. THD + Noise vs. Frequency
100k
(200ns/DIV)
Figure 32. Large-Signal Transient Response
0.08
0.07
0.06
VSY = ±2.5V
RL = 600Ω
AV = –10
TA = 25°C
0.05
0.04
0.03
0.02
0.01
0
10 100 1k 10k
FREQUENCY (Hz)
Figure 33. THD + Noise vs. Frequency
100k
Rev. F | Page 11 of 18
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet AD8647.PDF ] | |
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