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AD8309

5 MHz–500 MHz 100 dB Demodulating Logarithmic Amplifier with Limiter Output

Analog Devices 

AD8309

ABSOLUTE MAXIMUM RATINGS*

Supply Voltage VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 V

Input Level, Differential (re 50 Ω) . . . . . . . . . . . . . . . +26 dBm

Input Level, Single-Ended (re 50 Ω) . . . . . . . . . . . . . +20 dBm

Internal Power Dissipation . . . . . . . . . . . . . . . . . . . . . 500 mW

θJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C/W

θJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27.6°C/W

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

*Stresses above those listed under Absolute Maximum Ratings may cause perma-

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 effect device reliability.

ORDERING GUIDE

Model

Temperature Package

Range

Description

Package

Option

AD8309ARU

–40°C to +85°C 16-Lead TSSOP RU-16

AD8309ARU-REEL –40°C to +85°C 13" Tape and Reel RU-16

AD8309ARU-REEL7 –40°C to +85°C 7" Tape and Reel RU-16

AD8309-EVAL

Evaluation Board

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 AD8309 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.

WARNING!

ESD SENSITIVE DEVICE

PIN FUNCTION DESCRIPTIONS

Pin

Name Function

1

COM2 Special Common Pin for RSSI Output.

2

VPS1 Supply Pin for First Five Amplifier Stages

and the Main Biasing System.

3, 6, 11, 14 PADL Four Tie-Downs to the Paddle on Which

the IC Is Mounted; Grounded.

4

INHI Signal Input, HI or Plus Polarity.

5

INLO Signal Input, LO or Minus Polarity.

7

COM1 Main Common Connection.

8

ENBL Chip Enable; Active When HI.

9

LMDR Limiter Drive Programming Pin.

10

FLTR RSSI Bandwidth-Reduction Pin.

12

LMLO Limiter Output, LO or Minus Polarity.

13

LMHI Limiter Output, HI or Plus Polarity.

15

VPS2 Supply Pin for Sixth Gain Stage, Limiter

and RSSI Output Stage Load Current.

16

VLOG Logarithmic (RSSI) Output.

PIN CONFIGURATION

COM2 1

16 VLOG

VPS1 2

15 VPS2

PADL 3

14 PADL

INHI 4 AD8309 13 LMHI

INLO

5

TOP VIEW

(Not to Scale) 12

LMLO

PADL 6

11 PADL

COM1 7

10 FLTR

ENBL 8

9 LMDR

REV. B

–3–

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