Datenblatt-pdf.com


AD8504 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer AD8504
Beschreibung Micropower CMOS Operational Amplifiers
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 16 Seiten
AD8504 Datasheet, Funktion
FEATURES
Supply current: 1 μA maximum/amplifier
Offset voltage: 3 mV maximum
Single-supply or dual-supply operation
Rail-to-rail input and output
No phase reversal
Unity gain stable
APPLICATIONS
Portable equipment
Remote sensors
Low power filters
Threshold detectors
Current sensing
GENERAL DESCRIPTION
The AD8502/AD8504 are low power, precision CMOS operational
amplifiers featuring a maximum supply current of 1 μA per
amplifier. The AD8502/AD8504 have a maximum offset voltage
of 3 mV and a typical input bias current of 1 pA operating rail-
to-rail on both the input and output. The AD8502/AD8504 can
operate from a single-supply voltage of +1.8 V to +5.5 V or a
dual-supply voltage of ±0.9 V to ±2.75 V.
With its low power consumption, low input bias current, and
rail-to-rail input and output, the AD8502/AD8504 are ideally
suited for a variety of battery-powered portable applications.
Potential applications include bedside monitors, pulse monitors,
glucose meters, smoke and fire detectors, vibration monitors,
and backup battery sensors.
The ability to swing rail-to-rail at both the input and output
helps maximize dynamic range and signal-to-noise ratio in
systems that operate at very low voltages. The low offset voltage
allows use of the AD8502/AD8504 in systems with high gain
1 μA Micropower CMOS
Operational Amplifiers
AD8502/AD8504
PIN CONFIGURATIONS
OUT A 1
8 V+
–IN A 2 AD8502 7 OUT B
+IN A
3
TOP VIEW
(Not to Scale)
6
–IN B
V– 4
5 +IN B
Figure 1. 8-Lead SOT-23
OUT A 1
–IN A 2
+IN A 3
V+ 4
+IN B 5
–IN B 6
OUT B 7
AD8504
TOP VIEW
(Not to Scale)
14 OUT D
13 –IN D
12 +IN D
11 V–
10 +IN C
9 –IN C
8 OUT C
Figure 2. 14-Lead TSSOP (RU-14)
without creating excessively large output offset errors. The
AD8502 and AD8504 offer an additional benefit by providing
high accuracy without the need for system calibration.
The AD8502/AD8504 are fully specified over the industrial
temperature range (−40°C to +85°C) and the extended indus-
trial temperature range (−40°C to +125°C). The AD8502 is
available in an 8-lead, SOT-23 surface-mount package. The
AD8504 is available in a 14-lead TSSOP surface-mount package.
Table 1. Low Supply Current Op Amps
Supply Current
1 μA
10 μA
Single
AD8500
Dual AD8502 ADA4505-2
Quad
AD8504 ADA4505-4
20 μA
AD8506
AD8508
Rev. A
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
www.analog.com
Fax: 781.461.3113 ©2007–2009 Analog Devices, Inc. All rights reserved.






AD8504 Datasheet, Funktion
AD8502/AD8504
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 4.
Parameter
Supply Voltage
Input Voltage
Differential Input Voltage
Output Short-Circuit Duration to GND
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature (Soldering, 60 sec)
Rating
6V
VSS − 0.3 V to VDD + 0.3 V
±6 V
Indefinite
−65°C to +150°C
−40°C to +125°C
−65°C to +150°C
300°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.
Absolute maximum ratings apply at 25°C, unless otherwise noted.
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Table 5. Thermal Characteristics
Package Type
θJA
8-Lead SOT-23 (RJ-8)
376
14-Lead TSSOP (RU-14)
180
θJC Unit
126 °C/W
35 °C/W
ESD CAUTION
Rev. A | Page 6 of 16

6 Page









AD8504 pdf, datenblatt
AD8502/AD8504
80
PHASE
60
120
90
40 60
20 GAIN
30
00
–20 –30
–40 –60
–60 –90
–8010
100 1k 10k
FREQUENCY (Hz)
–120
100k
Figure 33. Open-Loop Gain and Phase vs. Frequency, VS = 1.8 V
100
90
80
70
60
50
40
30
20
10
0
0.01
0.1 1
FREQUENCY (kHz)
Figure 34. CMRR vs. Frequency, VS = 1.8 V
10
35
30
OS–
25
20
OS+
15
10
5
0
10 100 1000
LOAD CAPACITANCE (pF)
Figure 35. Small Signal Overshoot vs. Load Capacitance, VS = 1.8 V
0.20
0.15
0.10
0.05
0
–0.05
–0.10
–0.15
–0.20
–0.5
0
0.5 1.0
1.5
TIME (ms)
Figure 36. Small Signal Transient Response (No Load), VS = 1.8 V
Rev. A | Page 12 of 16

12 Page





SeitenGesamt 16 Seiten
PDF Download[ AD8504 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
AD8500Micropower Precision CMOS Operational AmplifierAnalog Devices
Analog Devices
AD8502Micropower CMOS Operational AmplifiersAnalog Devices
Analog Devices
AD8504Micropower CMOS Operational AmplifiersAnalog Devices
Analog Devices
AD8505Zero Input Crossover Distortion AmplifiersAnalog Devices
Analog Devices
AD8506Zero Input Crossover Distortion AmplifiersAnalog 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