AD8304 Analog Devices, AD8304 Datasheet - Page 3

• Manufacturer Part Number: AD8304
• Description: 160 DB Logarithmic Amplifier With Photo-diode Interface
• Manufacturer: Analog Devices

ABSOLUTE MAXIMUM RATINGS
Supply Voltage V
Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Internal Power Dissipation . . . . . . . . . . . . . . . . . . . . 270 mW
Maximum Junction Temperature . . . . . . . . . . . . . . . . . 125°C
Operating Temperature Range . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range (Soldering 60 sec) . . . . . . . . . 300°C
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although the
AD8304 features proprietary ESD protection circuitry, permanent damage may occur on devices
subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are recommended
to avoid performance degradation or loss of functionality.
nent 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.
Stresses above those listed under Absolute Maximum Ratings may cause perma-
JA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C/W
Model
AD8304ARU
AD8304ARU-REEL
AD8304ARU-REEL7
AD8304-EVAL
P
– V
PIN CONFIGURATION
PWDN
VSUM
VSUM
VNEG
VPDB
VREF
INPT
N
. . . . . . . . . . . . . . . . . . . . . . . . . . . 8 V
1
2
3
4
5
6
7
(Not to Scale)
AD8304
TOP VIEW
14
13
12
11
10
9
8
ACOM
BFNG
VPS1
VOUT
VPS2
BFIN
VLOG
Temperature Range
–40°C to +85°C
ORDERING GUIDE
Pin No.
1
2
3, 5
4
6
7
8
9
10
11
12
13
14
Package Description
Tube, 14-Lead TSSOP
13" Tape and Reel
7" Tape and Reel
Evaluation Board
Mnemonic
VNEG
PWDN
VSUM
INPT
VPDB
VREF
VLOG
BFIN
VPS2
VOUT
VPS1
BFNG
ACOM
PIN FUNCTION DESCRIPTIONS
Function
Optional Negative Supply, V
This pin is usually grounded; for
details of usage, see Applications section.
Power Down Control Input. Device is
active when PWDN is taken LOW.
Guard Pins. Used to shield the INPT
current line.
Photodiode Current Input. Usually
connected to photodiode anode (the
photo current flows toward INPT).
Photodiode Biaser Output. May be
connected to photodiode cathode to
provide adaptive bias control.
Voltage Reference Output of 2 V.
Output of the logarithmic front-end
processor; R
Buffer Amplifier noninverting input
(high impedance)
Positive Supply, V
Buffer Output; Low Impedance
Positive Supply, V
Buffer Amplifier Inverting Input
Analog Ground
Package Option
RU-14
WARNING!
OUT
= 5 kΩ to ground.
ESD SENSITIVE DEVICE
P
P
(3.0 V to 5.5 V)
(3.0 V to 5.5 V)
AD8304
N
.