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ADA4805-2TRMZ-EPR7

P1-P3P4-P6P7-P9
0.4 µV/°C Offset Drift, 105 MHz Low Power,
Low Noise, Rail-to-Rail Amplifier
Enhanced Product
ADA4805-2-EP
Rev. 0 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.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2016 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
FEATURES
Low input offset voltage: 125 µV (maximum)
Low input offset voltage drift
0.4 µV/°C (typical)
2.7 µV/°C (maximum)
Ultralow supply current: 500 µA per amplifier
Fully specified at V
S
= 3 V, 5 V, ±5 V
High speed performance
−3 dB bandwidth: 105 MHz
Slew rate: 160 V/µs
Settling time to 0.1%: 35 ns
Rail-to-rail outputs
Input common-mode range: −V
S
− 0.1 V to +V
S
− 1 V
Low noise: 5.9 nV/√Hz at 100 kHz; 0.6 pA/√Hz at 100 kHz
Low distortion: −102 dBc/−126 dBc HD2/HD3 at 100 kHz
Low input bias current: 470 nA (typical)
Small packaging
8-lead MSOP
ENHANCED PRODUCT FEATURES
Supports defense and aerospace applications (AQEC standard)
Extended industrial temperature range (−55°C to +125°C)
Controlled manufacturing baseline
1 assembly/test site
1 fabrication site
Enhanced product change notification
Qualification data available upon request
APPLICATIONS
High resolution, high precision analog-to-digital converter
(ADC) drivers
Battery-powered instrumentation
Micropower active filters
Portable point of sales terminals
Active radio frequency identification (RFID) readers
Photomultipliers
ADC reference buffers
GENERAL DESCRIPTION
The ADA4805-2-EP is a high speed voltage feedback, rail-to-rail
output amplifier with an exceptionally low quiescent current of
500 µA, making it ideal for low power, high resolution data
conversion systems. Despite being low power, this amplifier
provides excellent overall performance. It offers a high bandwidth
of 105 MHz at a gain of +1, a high slew rate of 160 V/µs, and a
low input offset voltage of 125 µV (maximum).
TYPICAL APPLICATIONS CIRCUIT
AD7980
C2
10µF
IN+
IN–
GND
VDDREF
C3
0.1µF
C4
100nF
VDD
C1
2.7nF
R3
20Ω
+7.5V
+7.5V
ADA4805-2-EP
ADA4805-2-EP
ADR435
5V REF
0V TO
V
REF
13741-010
Figure 1. Driving the AD7980 with the ADA4805-2-EP
The Analog Devices, Inc., proprietary extra fast complementary
bipolar (XFCB) process allows both low voltage and low current
noise (5.9 nV/√Hz, 0.6 pA/√Hz). The ADA4805-2-EP operates
over a wide range of supply voltages from ±1.5 V to ±5 V, as well as
single 3 V and 5 V supplies, making it ideal for high speed, low
power instruments.
The ADA4805-2-EP is available in an 8-lead MSOP package and is
rated to work over the extended industrial temperature range of
−55°C to +125°C. Additional application and technical infor-
mation can be found in the ADA4805-1/ADA4805-2 data sheet.
0
8020 40 60 70503010
FREQUENCY (kHz)
–20
0
–40
–60
–80
–100
AMPLITUDE (dB)
–120
–140
–160
–180
13741-102
INPUT FREQUENCY = 10kHz
SNR = 89.4dB
THD = 104dB
SINAD = 89.3dB
Figure 2. FFT Plot for the Circuit Configuration in Figure 1
Table 1. Complementary ADCs to the ADA4805-2-EP
Product ADC Power (mW)
Throughput
(MSPS)
Resolution
(Bits)
SNR
(dB)
AD7982 7.0 1 18 98
AD7984 10.5 1.33 18 98.5
AD7980 4.0 1 16 91
AD7685 10 0.25 16 88
ADA4805-2-EP Enhanced Product
Rev. 0 | Page 2 of 9
TABLE OF CONTENTS
Features .............................................................................................. 1
Enhanced Product Features ............................................................ 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Typical Applications Circuit ............................................................ 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
±5 V Supply ................................................................................... 3
5 V Supply ...................................................................................... 4
3 V Supply ...................................................................................... 5
Absolute Maximum Ratings ............................................................6
Thermal Resistance .......................................................................6
Maximum Power Dissipation ......................................................6
ESD Caution...................................................................................6
Pin Configuration and Function Descriptions ..............................7
Typical Performance Characteristics ..............................................8
Outline Dimensions ..........................................................................9
Ordering Guide .............................................................................9
REVISION HISTORY
4/16—Revision 0: Initial Version
Enhanced Product ADA4805-2-EP
Rev. 0 | Page 3 of 9
SPECIFICATIONS
±5 V SUPPLY
V
S
= ±5 V at T
A
= 25°C; R
F
= 0 Ω for G = +1; otherwise, R
F
= 1 kΩ; R
L
= 2 kΩ to ground; unless otherwise noted. All specifications are per
amplifier.
Table 2.
Parameter Test Conditions/Comments Min Typ Max Unit
DYNAMIC PERFORMANCE
−3 dB Bandwidth G = +1, V
OUT
= 0.02 V p-p 120 MHz
G = +1, V
OUT
= 2 V p-p 40 MHz
Bandwidth for 0.1 dB Flatness G = +1, V
OUT
= 0.02 V p-p 18 MHz
Slew Rate G = +1, V
OUT
= 2 V step 190 V/µs
G = +2, V
OUT
= 4 V step 250 V/µs
Settling Time to 0.1% G = +1, V
OUT
= 2 V step 35 ns
G = +2, V
OUT
= 4 V step 78 ns
NOISE/DISTORTION PERFORMANCE
Harmonic Distortion, HD2/HD3
1
f
C
= 20 kHz, V
OUT
= 2 V p-p −114/−140 dBc
f
C
= 100 kHz, V
OUT
= 2 V p-p −102/−128 dBc
f
C
= 20 kHz, V
OUT
= 4 V p-p, G = +1 −109/−143 dBc
f
C
= 100 kHz, V
OUT
= 4 V p-p, G = +1 −93/−130 dBc
f
C
= 20 kHz, V
OUT
= 4 V p-p, G = +2 −113/−142 dBc
f
C
= 100 kHz, V
OUT
= 4 V p-p, G = +2 −96/−130 dBc
Input Voltage Noise f = 100 kHz 5.2 nV/√Hz
Input Voltage Noise 1/f Corner Frequency 8 Hz
0.1 Hz to 10 Hz Voltage Noise
44
nV rms
Input Current Noise f = 100 kHz 0.7 pA/√Hz
DC PERFORMANCE
Input Offset Voltage 13 125 µV
Input Offset Voltage Drift
2
MIN
MAX
0.4
2.7
µV/°C
Input Bias Current
550
800
nA
Input Offset Current 2.1 25 nA
Open-Loop Gain V
OUT
= −4.0 V to +4.0 V 107 111 dB
INPUT CHARACTERISTICS
Input Resistance
Common Mode 50 MΩ
Differential Mode 260 kΩ
Input Capacitance 1 pF
Input Common-Mode Voltage Range −5.1 +4 V
Common-Mode Rejection Ratio V
IN, CM
= −4.0 V to +4.0 V 103 130 dB
OUTPUT CHARACTERISTICS
Output Overdrive Recovery Time (Rising/Falling Edge) V
IN
= +6 V to −6 V, G = +2 95/100 ns
Output Voltage Swing R
L
= 2 kΩ −4.98 +4.98 V
Short-Circuit Current Sinking/sourcing 85/73 mA
Linear Output Current <1% THD at 100 kHz, V
OUT
= 2 V p-p ±58 mA
Capacitive Load Drive 30% overshoot 15 pF
POWER SUPPLY
Operating Range 2.7 10 V
Quiescent Current per Amplifier 570 625 µA
Power Supply Rejection Ratio
Positive +V
S
= 3 V to 5 V, −V
S
= −5 V 100 119 dB
Negative +V
S
= 5 V, −V
S
= −3 V to −5 V 100 122 dB
1
f
C
is the fundamental frequency.
2
Guaranteed, but not tested.
P1-P3P4-P6P7-P9

ADA4805-2TRMZ-EPR7

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Buy ADA4805-2TRMZ-EPR7
Manufacturer:
Analog Devices Inc.
Description:
High Speed Operational Amplifiers Ultra Low Power 120MHz High Spd R/R AMP
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