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PDF AD8546 Data sheet ( Hoja de datos )
| Número de pieza | AD8546 | |
| Descripción | Operational Amplifier | |
| Fabricantes | Analog Devices | |
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Data Sheet
FEATURES
Micropower at high voltage (18 V): 22 μA maximum
Low input bias current: 20 pA maximum
Gain bandwidth product: 240 kHz at AV =100 typical
Unity-gain crossover: 240 kHz
−3 dB closed-loop bandwidth: 310 kHz
Slew rate: 80 V/ms
Large signal voltage gain: 110 dB minimum
Single-supply operation: 2.7 V to 18 V
Dual-supply operation: ±1.35 V to ±9 V
Unity-gain stable
Excellent electromagnetic interference immunity
APPLICATIONS
Portable medical equipment
Remote sensors
Transimpedance amplifiers
Current monitors
4 mA to 20 mA loop drivers
Buffer/level shifting
GENERAL DESCRIPTION
The AD8546 and AD8548 are dual and quad micropower, high
input impedance amplifiers optimized for low power and wide
operating supply voltage range applications.
The AD8546/AD8548 rail-to-rail input/output (RRIO) feature
provides increased dynamic range to drive low frequency data
converters, making these amplifiers ideal for dc gain and buffering
of sensor front ends or high impedance input sources used in
wireless or remote sensors or transmitters. The AD8546/
AD8548 also have high immunity to electromagnetic
interference.
The low supply current specification (22 μA) of the AD8546/
AD8548 over a wide operating voltage range of 2.7 V to 18 V
or dual supplies (±1.35 V to ±9 V) makes these amplifiers useful
for a variety of battery-powered, portable applications, such as
ECGs, pulse monitors, glucose meters, smoke and fire detectors,
vibration monitors, and backup battery sensors.
The AD8546/AD8548 are specified over the extended industrial
temperature range of −40°C to +125°C. The AD8546 is available
in an 8-lead MSOP package; the AD8548 is available in a 14-lead
SOIC_N package.
22 μA, RRIO, CMOS, 18 V
Operational Amplifier
AD8546/AD8548
PIN CONFIGURATIONS
OUT A 1
–IN A 2
+IN A 3
V– 4
AD8546
TOP VIEW
(Not to Scale)
8 V+
7 OUT B
6 –IN B
5 +IN B
Figure 1. AD8546 (8-Lead MSOP)
OUT A 1
14 OUT D
–IN A 2
13 –IN D
+IN A 3 AD8548 12 +IN D
V+ 4 TOP VIEW 11 V–
+IN B 5 (Not to Scale) 10 +IN C
–IN B 6
9 –IN C
OUT B 7
8 OUT C
Figure 2. AD8548 (14-Lead SOIC_N)
Table 1. Micropower Op Amps (<250 μA Typical)1
Supply Voltage
Amplifier
5V
12 V to 18 V 36 V
Single
AD8500
AD8663
AD8505
AD8541
AD8603
ADA4505-1
Dual
AD8502
AD8546
AD8506
AD8657
ADA4062-2
AD8542
AD8667
ADA4096-2
AD8607
OP281
ADA4505-2
Quad
AD8504
AD8548
AD8508
AD8669
ADA4062-4
AD8544
OP481
ADA4096-4
AD8609
AD8659
ADA4505-4
1 See www.analog.com for the latest selection of micropower op amps.
Rev. C
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 ©2011–2012 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
AD8546/AD8548
ELECTRICAL CHARACTERISTICS—2.7 V OPERATION
VSY = 2.7 V, VCM = VSY/2, TA = 25°C, unless otherwise noted.
Table 4.
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 Resistance
Input Capacitance
Differential Mode
Common Mode
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
Short-Circuit Current
Closed-Loop Output Impedance
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current per Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Settling Time to 0.1%
Unity Gain Crossover
Phase Margin
Gain Bandwidth Product
−3 dB Closed-Loop Bandwidth
Channel Separation
EMI Rejection Ratio of +IN x
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
Symbol Test Conditions/Comments
VOS
ΔVOS/ΔT
IB
IOS
IVR
CMRR
AVO
RIN
VCM = 0 V to 2.7 V
VCM = 0.3 V to 2.4 V; −40°C ≤ TA ≤ +125°C
VCM = 0 V to 2.7 V; −40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +125°C
VCM = 0 V to 2.7 V
VCM = 0.3 V to 2.4 V; −40°C ≤ TA ≤ +125°C
VCM = 0 V to 2.7 V; −40°C ≤ TA ≤ +125°C
RL = 100 kΩ; VO = 0.5 V to 2.2 V
−40°C ≤ TA ≤ +125°C
CINDM
CINCM
VOH RL = 100 kΩ to VCM; −40°C ≤ TA ≤ +125°C
VOL RL = 100 kΩ to VCM; −40°C ≤ TA ≤ +125°C
ISC
ZOUT f = 1 kHz; AV = +1
PSRR
ISY
VSY = 2.7 V to 18 V
−40°C ≤ TA ≤ +125°C
IO = 0 mA
−40°C ≤ TA ≤ +125°C
SR
tS
UGC
ΦM
GBP
f−3 dB
CS
EMIRR
RL = 1 MΩ; CL = 10 pF; AV = +1
VIN = 1 V step; RL = 100 kΩ; CL = 10 pF
VIN = 10 mV p-p; RL = 1 MΩ; CL = 10 pF; AV = +1
VIN = 10 mV p-p; RL = 1 MΩ; CL = 10 pF; AV = +1
VIN = 10 mV p-p; RL = 1 MΩ; CL = 10 pF; AV = +100
VIN = 10 mV p-p; RL = 1 MΩ; CL = 10 pF; AV = +1
f = 10 kHz; RL = 1 MΩ
VIN = 100 mV p-p; f = 400 MHz, 900 MHz,
1800 MHz, 2400 MHz
en p-p
en
in
f = 0.1 Hz to 10 Hz
f = 1 kHz
f = 10 kHz
f = 1 kHz
Min
0
60
58
49
97
90
2.69
95
90
Typ Max
3
4
12
3
1 10
2.6
20
5.2
2.7
75
115
10
11
3.5
10
±4
20
115
18 22
33
50
20
190
60
200
250
105
90
6
60
56
0.1
Unit
mV
mV
mV
µV/°C
pA
nA
pA
nA
V
dB
dB
dB
dB
dB
GΩ
pF
pF
V
mV
mA
Ω
dB
dB
µA
µA
V/ms
µs
kHz
Degrees
kHz
kHz
dB
dB
µV p-p
nV/√Hz
nV/√Hz
pA/√Hz
Rev. C | Page 5 of 24
5 Page 
Data Sheet
60 135
PHASE
VSY = 2.7V
RL = 1MΩ
40 90
20
0 GAIN
45
0
–20 –45
CL = 10pF
–40 CL = 100pF
–90
–60
1k
–135
10k 100k 1M
FREQUENCY (Hz)
Figure 27. Open-Loop Gain and Phase vs. Frequency
60
40 AV = +100
20 AV = +10
AV = +1
0
VSY = 2.7V
–20
–40
–60
100
1k 10k 100k
FREQUENCY (Hz)
Figure 28. Closed-Loop Gain vs. Frequency
1M
1000
AV = +100
AV = +10
100
AV = +1
10
1
100
VSY = 2.7V
1k 10k
FREQUENCY (Hz)
Figure 29. Output Impedance vs. Frequency
100k
AD8546/AD8548
60 135
PHASE
VSY = 18V
RL = 1MΩ
40 90
20 45
00
GAIN
–20 –45
CL = 10pF
–40 CL = 100pF
–90
–60
1k
–135
10k 100k 1M
FREQUENCY (Hz)
Figure 30. Open-Loop Gain and Phase vs. Frequency
60
40 AV = +100
20 AV = +10
AV = +1
0
VSY = 18V
–20
–40
–60
100
1k 10k 100k
FREQUENCY (Hz)
Figure 31. Closed-Loop Gain vs. Frequency
1M
1000
AV = +100
100
AV = +10
AV = +1
10
1
100
VSY = 18V
1k 10k
FREQUENCY (Hz)
Figure 32. Output Impedance vs. Frequency
100k
Rev. C | Page 11 of 24
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet AD8546.PDF ] | |
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