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AD606

50 MHz, 80 dB Demodulating Logarithmic Amplifier with Limiter Output

Analog Devices 

ABSOLUTE MAXIMUM RATINGS1

Supply Voltage VPOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . +9 V

Internal Power Dissipation2 . . . . . . . . . . . . . . . . . . . 600 mW

Operating Temperature Range . . . . . . . . . . . . . 0°C to +70°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

Lead Temperature Range (Soldering 60 sec) . . . . . . . . +300°C

NOTES

1Stresses 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 affect device reliability.

2Specification is for device in free air:

16-Lead Plastic DIP Package: θJA = 85°C/W

16-Lead SOIC Package: θJA = 100°C/W

ORDERING GUIDE

Model

Temperature Package

Range

Description

Package

Option

AD606JN

0°C to +70°C 16-Lead Plastic DIP N-16

AD606JR

0°C to +70°C 16-Lead Narrow-Body R-16A

SOIC

AD606JR-REEL 0°C to +70°C 13" Tape and Reel R-16A

AD606JR-REEL7 0°C to +70°C 7" Tape and Reel R-16A

AD606-EB

Evaluation Board

AD606JCHIPS 0°C to +70°C Die

PIN DESCRIPTION

Plastic DIP (N)

and

Small Outline (R)

Packages

INLO 1

16 INHI

COMM 2

15 COMM

ISUM 3

14 PRUP

ILOG 4 AD606 13 VPOS

TOP VIEW

BFIN 5 (Not to Scale) 12 FIL1

VLOG 6

11 FIL2

OPCM 7

10 LADJ

LMLO 8

9 LMHI

AD606

PIN FUNCTION DESCRIPTIONS

Pin Mnemonic Function

1 INLO

2 COMM

3 ISUM

4 ILOG

5 BFIN

6 VLOG

7 OPCM

8 LMLO

9 LMHI

10 LADJ

11 FIL1

12 FIL2

13 VPOS

14 PRUP

15 COMM

16 INHI

DIFFERENTIAL RF INPUT

–75 dBm to +5 dBm, Inverting, AC Coupled.

POWER SUPPLY COMMON

Connect to Ground.

LOG DETECTOR SUMMING NODE

LOG CURRENT OUTPUT

Normally No Connection; 2 µA/dB Output

Current.

BUFFER INPUT

Optionally Used to Realize Low Frequency

Post-Demodulation Filters.

BUFFERED LOG OUTPUT

37.5 mV/dB (100 mV to 4.5 V).

OUTPUT COMMON

Connect to Ground.

DIFFERENTIAL LIMITER OUTPUT

1.2 mA Full-Scale Output Current. Open

Collector Output Must Be “Pulled” Up to

VPOS with R ≤ 400 Ω.

DIFFERENTIAL LIMITER OUTPUT

1.2 mA Full-Scale Output Current. Open

Collector Output Must Be “Pulled” Up to

VPOS with R ≤ 400 Ω.

LIMITER LEVEL ADJUSTMENT

Optionally Used to Adjust Limiter Output

Current.

OFFSET LOOP LOW-PASS FILTER

Normally No Connection; a Capacitor Between

FIL1 and FIL2 May Be Added to Lower the

Filter Cutoff Frequency.

OFFSET LOOP LOW-PASS FILTER

Normally No Connection; See Above.

POSITIVE SUPPLY

Connect to +5 V at 13 mA.

POWER UP

CMOS (5 V) Logical High = Device On

(≈ 65 mW).

CMOS (0 V) Logical Low = Device Off

(≈ 325 µW).

POWER SUPPLY COMMON

Connect to Ground.

DIFFERENTIAL RF INPUT

–75 dBm to +5 dBm, Noninverting, AC-Coupled.

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 AD606 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

REV. B

–3–

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