Datenblatt-pdf.com


AD8548 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer AD8548
Beschreibung Operational Amplifier
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 24 Seiten
AD8548 Datasheet, Funktion
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






AD8548 Datasheet, Funktion
AD8546/AD8548
ABSOLUTE MAXIMUM RATINGS
Table 5.
Parameter
Supply Voltage
Input Voltage
Input Current1
Differential Input Voltage
Output Short-Circuit Duration
to GND
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature
(Soldering, 60 sec)
Rating
20.5 V
(V−) − 300 mV to (V+) + 300 mV
±10 mA
±VSY
Indefinite
−65°C to +150°C
−40°C to +125°C
−65°C to +150°C
300°C
1 The input pins have clamp diodes to the power supply pins. Limit the input
current to 10 mA or less whenever input signals exceed the power supply
rail by 0.3 V.
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.
Data Sheet
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages using
a standard 4-layer board.
Table 6. Thermal Resistance
Package Type
8-Lead MSOP (RM-8)
14-Lead SOIC_N (R-14)
θJA
142
115
θJC
45
36
Unit
°C/W
°C/W
ESD CAUTION
Rev. C | Page 6 of 24

6 Page









AD8548 pdf, datenblatt
AD8546/AD8548
140
VSY = 2.7V
VCM = VSY/2
120
100
80
60
40
20
0
100 1k 10k 100k
FREQUENCY (Hz)
Figure 33. CMRR vs. Frequency
1M
100
80
60
40
20
0
100
VSY = 2.7V
PSRR+
PSRR–
1k 10k 100k
FREQUENCY (Hz)
Figure 34. PSRR vs. Frequency
1M
70
VSY = 2.7V
60
VIN = 10mV p-p
RL = 1MΩ
50
40
30
20
OS+
OS–
10
0
10 100 1000
CAPACITANCE (pF)
Figure 35. Small Signal Overshoot vs. Load Capacitance
140
120
100
80
60
40
20
0
100
Data Sheet
VSY = 18V
VCM = VSY/2
1k 10k 100k
FREQUENCY (Hz)
Figure 36. CMRR vs. Frequency
1M
100
80
60
40
20
0
100
VSY = 18V
PSRR+
PSRR–
1k 10k 100k
FREQUENCY (Hz)
Figure 37. PSRR vs. Frequency
1M
70
VSY = 18V
VIN = 10mV p-p
60 RL = 1MΩ
50
40
30
20
OS+
OS–
10
0
10 100 1000
CAPACITANCE (pF)
Figure 38. Small Signal Overshoot vs. Load Capacitance
Rev. C | Page 12 of 24

12 Page





SeitenGesamt 24 Seiten
PDF Download[ AD8548 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
AD8541CMOS Rail-to-Rail General-Purpose AmplifiersAnalog Devices
Analog Devices
AD8542CMOS Rail-to-Rail General-Purpose AmplifiersAnalog Devices
Analog Devices
AD8544CMOS Rail-to-Rail General-Purpose AmplifiersAnalog Devices
Analog Devices
AD8546Operational AmplifierAnalog Devices
Analog Devices
AD8548Operational AmplifierAnalog Devices
Analog Devices

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche