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PDF AD8505 Data sheet ( Hoja de datos )
| Número de pieza | AD8505 | |
| Descripción | Zero Input Crossover Distortion Amplifiers | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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20 μA Maximum, Rail-to-Rail I/O,
Zero Input Crossover Distortion Amplifiers
AD8505/AD8506/AD8508
FEATURES
PSRR: 100 dB minimum
CMRR: 105 dB typical
Very low supply current: 20 μA per amplifier maximum
1.8 V to 5 V single supply or ±0.9 V to ±2.5 V dual supply
Rail-to-rail input/output
Low noise: 45 nV/√Hz at 1 kHz
2.5 mV offset voltage maximum
Very low input bias current: 1 pA typical
APPLICATIONS
Pressure and position sensors
Remote security
Bio sensors
IR thermometers
Battery-powered consumer equipment
Hazard detectors
GENERAL DESCRIPTION
The AD8505/AD8506/AD8508 are single, dual, and quad micro-
power amplifiers featuring rail-to-rail input/output swings while
operating from a single 1.8 V to 5 V power supply or from dual
±0.9 V to ±2.5 V power supplies. Using a new circuit technology,
these amplifiers offer zero input crossover distortion (excellent
PSRR and CMRR performance) and low bias current while
operating with a supply current of less than 20 μA per amplifier.
This amplifier family offers the lowest noise in its power class.
This combination of features makes the AD8505/AD8506/AD8508
amplifiers ideal choices for battery-powered applications because
they minimize errors due to power supply voltage variations over
the lifetime of the battery and maintain high CMRR even for a rail-
to-rail input op amp. Remote battery-powered sensors, handheld
instrumentation, consumer equipment, hazard detection (for
example, smoke, fire, and gas), and patient monitors can benefit
from the features of the AD8505/AD8506/AD8508 amplifiers.
The AD8505/AD8506/AD8508 are specified for both the industrial
temperature range of −40°C to +85°C and the extended industrial
temperature range of −40°C to +125°C. The AD8505 single ampli-
fier is available in a tiny 5-lead SOT-23 and a 6-ball WLCSP
packages. The AD8506 dual amplifier is available in 8-lead MSOP
and 8-ball WLCSP packages. The AD8508 quad amplifier is
available in 14-lead TSSOP and 14-ball WLCSP packages. The
AD8505/AD8506/AD8508 are members of a growing series of
zero crossover distortion op amps offered by Analog Devices,
Inc., including the ADA4505-1/ADA4505-2/ADA4505-4, that
operate from a single 1.8 V to 5 V supply or from dual ±0.9 V to
±2.5 V power supplies.
PIN CONFIGURATIONS
BALL A1
INDICATOR
OUT 1
5 V+
AD8505
V– 2 TOP VIEW
(Not to Scale)
+IN 3
4 –IN
Figure 1. 5-Lead SOT-23 (RJ-5)
OUT V+
A1 A2
V– NC
B1 B2
+IN –IN
C1 C2
AD8505
TOP VIEW
(BALL SIDE DOWN)
Not to Scale
NC = NO CONNECT
Figure 2. 6-Ball WLCSP (CB-6-7)
OUT A 1
–IN A 2
+IN A 3
V– 4
AD8506
TOP VIEW
(Not to Scale)
8 V+
7 OUT B
6 –IN B
5 +IN B
Figure 3. 8-Lead MSOP (RM-8)
BALL A1
CORNER
OUT B
A1
V+
A2
–IN B
B1
+IN B
C1
V–
C2
OUT A
A3
–IN A
B3
+IN A
C3
AD8506
TOP VIEW
(BALL SIDE DOWN)
Not to Scale
Figure 4. 8-Ball WLCSP (CB-8-2)
OUT A 1
14 OUT D
–IN A 2
13 –IN D
+IN A 3 AD8508 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 5. 14-Lead TSSOP (RU-14)
BALL A1
CORNER
OUTD
A1
OUTA
A2
–INA
A3
–IND V– +INA
B1 B2 B3
+IND
C1
+INB
C3
+INC V+ –INB
D1 D2 D3
–INC
E1
OUTC
E2
OUTB
E3
AD8508
TOP VIEW
(BALL SIDE DOWN)
Not to Scale
Figure 6. 14-Ball WLCSP (CB-14-1)
Rev. E
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 ©2007–2010 Analog Devices, Inc. All rights reserved.
1 page  
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
Supply Voltage
Input Voltage
Input Current1
Differential Input Voltage2
Output Short-Circuit Duration to GND
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature (Soldering, 60 sec)
Rating
5.5 V
±VSY ± 0.1 V
±10 mA
±VSY
Indefinite
−65°C to +150°C
−40°C to +125°C
−65°C to +150°C
300°C
1 Input pins have clamp diodes to the supply pins. The input current should
be limited to 10 mA or less whenever the input signal exceeds the power
supply rail by 0.5 V.
2 The differential input voltage is limited to 5 V or the supply voltage, whichever
is less.
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.
AD8505/AD8506/AD8508
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages with its
exposed paddle soldered to a pad, if applicable. Table 4 shows
simulated thermal values for a 4-layer (2S2P) JEDEC standard
thermal test board, unless otherwise specified.
Table 4.
Package Type
5-Lead SOT-23 (RJ-5)
6-Ball WLCSP (CB-6-7)
8-Lead MSOP (RM-8)
8-Ball WLCSP (CB-8-2)
14-Lead TSSOP (RU-14)
14-Ball WLCSP (CB-14-1)
θJA θJC Unit
190 92 °C/W
105 N/A °C/W
142 45 °C/W
82 N/A °C/W
112 35 °C/W
64 N/A °C/W
ESD CAUTION
Rev. E | Page 5 of 20
5 Page 
TA = 25°C, unless otherwise noted.
VSY = 1.8V
RL = 100kΩ
CL = 200pF
G=1
AD8505/AD8506/AD8508
VSY = 5V
RL = 100kΩ
CL = 200pF
G=1
TIME (100µs/DIV)
Figure 37. Large-Signal Transient Response
VSY = 1.8V
RL = 100kΩ
CL = 200pF
G=1
TIME (100µs/DIV)
Figure 40. Large-Signal Transient Response
VSY = 5V
RL = 100kΩ
CL = 200pF
G=1
TIME (100µs/DIV)
Figure 38. Small-Signal Transient Response
VSY = 1.8V AND 5V
2.78µV p-p
TIME (4s/DIV)
Figure 39. Input Voltage Noise 0.1 Hz to 10 Hz
TIME (100µs/DIV)
Figure 41. Small-Signal Transient Response
1k
VSY = 1.8V AND 5V
100
10
1
1 10 100 1k
FREQUENCY (Hz)
Figure 42. Voltage Noise Density vs. Frequency
10k
Rev. E | Page 11 of 20
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet AD8505.PDF ] | |
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