AD608ARZ Analog Devices Inc, AD608ARZ Datasheet

AD608ARZ

Manufacturer Part Number

AD608ARZ

Description

IC MIXER/LIMITER IF 3V 16-SOIC

Manufacturer

Analog Devices Inc

Series

AD608r

Datasheet

1.AD608-EBZ.pdf (16 pages)

Specifications of AD608ARZ

Rf Type

FM, GSM, PM, PHS, FM

Frequency

500MHz

Number Of Mixers

Gain

24dB

Noise Figure

16dB

Secondary Attributes

Down Converter

Current - Supply

7.3mA

Voltage - Supply

2.7 V ~ 5.5 V

Package / Case

16-SOIC (0.154", 3.90mm Width)

Supply Voltage Range

3V To 5.5V

Rf Ic Case Style

SOIC

No. Of Pins

Operating Temperature Range

-25Â°C To +85Â°C

Msl

MSL 1 - Unlimited

Ic Function

Mixer/Limiter/RSSI Receiver IF Subsystem

Termination Type

SMD

Supply Voltage Min

2.7V

Rohs Compliant

Yes

Operating Supply Voltage

Operating Temperature (max)

85C

Filter Terminals

SMD

Digital Ic Case Style

SOIC

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

AD608ARZ

Manufacturer:

ADI/亚德诺

Quantity:

20 000

Current page: 1 of 16
Download datasheet (321Kb)

FEATURES

Mixer

Logarithmic/limiting amplifier

Low power

APPLICATIONS

PHS, GSM, TDMA, FM, or PM receivers

Battery-powered instrumentation

Base station RSSI measurements

GENERAL DESCRIPTION

The AD608 provides a low power, low distortion, low noise mixer

as well as a complete, monolithic logarithmic/limiting amplifier

that uses a successive-detection technique. In addition, the AD608

provides both a high speed received signal strength indicator

(RSSI) output with 80 dB dynamic range and a hard-limited

output. The RSSI output is from a two-pole postdemodulation

low-pass filter and provides a loadable output voltage of 0.2 V to

1.8 V. The AD608 operates from a single 2.7 V to 5.5 V supply

at a typical power level of 21 mW at 3 V.

Rev. C

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.

Trademarks and registered trademarks are the property of their respective owners.

−15 dBm, 1 dB compression point

−5 dBm IP3

24 dB conversion gain

>500 MHz input bandwidth

80 dB RSSI range

±3° phase stability over 80 dB range

21 mW at 3 V power consumption

CMOS-compatible power-down to 300 μW typical

200 ns enable/disable time

–95dBm TO

RF INPUT

–15dBm

–15dBm = ±56mV MAXIMUM FOR LINEAR OPERATION.

39.76µV RMS TO 397.6mV RMS FOR ±1dB RSSI ACCURACY.

RFLO

RFHI

2.7V TO

VPS1 COM1

5.5V

PREAMP

24dB MIXER GAIN

LO INPUT

–16dBm

MIXER

±6mA MAX OUTPUT

(±890mV INTO 165Ω)

LOHI

MIDSUPPLY

COM2

IF BIAS

CMOS LOGIC

DRIVER

BPF

INPUT

VMID

MXOP

BIAS

PRUP

FUNCTIONAL BLOCK DIAGRAM

330Ω

BAND-PASS

100nF

INSERTION LOSS

10.7MHz

FILTER

3dB NOMINAL

330Ω

–75dBm TO

+15dBm

IF INPUT

100Ω

18nF

Figure 1.

10nF

IFHI

IFLO

FDBK

Low Power Mixer/Limiter/RSSI

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

The RF and local oscillator (LO) bandwidths both exceed

500 MHz. In a typical IF application, the AD608 can accept the

output of a 240 MHz surface acoustic wave (SAW) filter and down-

convert it to a nominal 10.7 MHz IF with a conversion gain of

24 dB (Z

section handles any IF from low frequency (LF) up to 30 MHz.

The mixer is a doubly balanced gilbert-cell mixer and operates

linearly for RF inputs spanning −95 dBm to −15 dBm. It has a

nominal −5 dBm third-order intercept. An on-board LO pre-

amplifier requires only −16 dBm of LO drive. The current output

of the mixer drives a reverse-terminated, industry-standard

10.7 MHz, 330 Ω filter.

The nominal logarithmic scaling is such that the output is +0.2 V

for a sinusoidal input to the IF amplifier of −75 dBm and +1.8 V

at an input of +5 dBm; over this range, the logarithmic confor-

mance is typically ±1 dB. The logarithmic slope is proportional

to the supply voltage. A feedback loop automatically nulls the

input offset of the first stage down to the submicrovolt level.

The AD608 limiter output provides a hard-limited signal output

at 400 mV p-p. The voltage gain of the limiting amplifier to this

output is more than 100 dB. Transition times are 11 ns and the

phase is stable to within ±3° at 10.7 MHz for signals from −75 dBm

to +5 dBm.

The AD608 is enabled by a CMOS logic-level voltage input,

with a response time of 200 ns. When disabled, the standby

power is reduced to 300 μW within 400 ns.

The AD608 is specified for the industrial temperature range of

−25°C to +85°C for 2.7 V to 5.5 V supplies and −40°C to +85°C for

3.0 V to 5.5 V supplies. This device comes in a 16-lead plastic SOIC.

5-STAGE IF AMPLIFIER

(16dB PER STAGE)

RECTIFIER CELLS

3 V Receiver IF Subsystem

7 FULL-WAVE

110dB LIMITER GAIN

= 165 Ω). The AD608 logarithmic/limiting amplifier

90dB RSSI

AD608

2MHz

LPF

LIMITER

FINAL

COM3

LMOP

±50µA

VPS2

RSSI

RSSI OUTPUT

20mV/dB

0.2V TO 1.8V

+2.7V TO 5.5V

LIMITER

OUTPUT

400mV p-p

www.analog.com

AD608

Related parts for AD608ARZ

AD608ARZ Summary of contents

Page 1

FEATURES Mixer −15 dBm compression point −5 dBm IP3 24 dB conversion gain >500 MHz input bandwidth Logarithmic/limiting amplifier 80 dB RSSI range ±3° phase stability over 80 dB range Low power power ...

Page 2

AD608 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 4 Thermal Resistance ...................................................................... 4 ESD Caution .................................................................................. 4 Pin ...

Page 3

SPECIFICATIONS T = 25°C, supply = 3 V, dBm is referred to 50 Ω, unless otherwise noted. A Table 1. Parameter Conditions MIXER PERFORMANCE RF and LO Frequency Range LO Power Input terminated in 50 Ω Conversion Gain Driving doubly ...

Page 4

AD608 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltages VPS1, VPS2 Internal Power Dissipation Temperature Range Storage Temperature Range Lead Temperature (Soldering 60 sec) Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This ...

Page 5

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic 1 1 VPS1 2 COM1 3 LOHI 4 COM2 5 RFHI 6 RFLO 7 MXOP 8 VMID 9 IFHI 10 IFLO 11 RSSI 12 COM3 13 FDBK ...

Page 6

AD608 TYPICAL PERFORMANCE CHARACTERISTICS 25.0 24.5 24.0 23.5 23.0 22.5 22 100 150 200 250 300 RF FREQUENCY (MHz) Figure 3. Mixer Conversion Gain vs. RF Frequency 0 –1 –2 –3 –4 –5 –6 –7 – ...

Page 7

Figure 9. RSSI Pulse Response/RSSI Rise Time (See Figure 16) 60mV/DIV 20ns/DIV Figure 10. Limiter Rise and Fall Times (See Figure 20) 100ns/DIV 220mV/DIV 1V/DIV 100ns/DIV Figure 11. Limiter Power-Up Response Time (See Figure 17 ...

Page 8

AD608 TEST CIRCUITS PRUP INPUT U1A U1B 4.7kΩ 1 VPS1 PRUP 16 0.1µF VPOS COM1 LMOP 2 15 0.1µF 3 VPS2 14 LOHI 51.1Ω 4 COM2 FDBK 13 1nF COM3 5 RFHI 12 1nF 51. 1Ω RFLO RSSI 11 6 ...

Page 9

THEORY OF OPERATION The AD608 consists of a mixer followed by a logarithmic IF strip with RSSI and hard-limited outputs (see Figure 22). MIXER The mixer is a doubly balanced, modified gilbert-cell mixer. Its maximum input level for linear operation ...

Page 10

AD608 IF FILTER TERMINATIONS The AD608 was designed to drive a parallel-terminated 10.7 MHz band-pass filter (BPF) with a 330 Ω impedance. With a 330 Ω parallel-terminated filter, Pin MXOP sees a 165 Ω termination, and the gain is nominally ...

Page 11

RSSI OUTPUT The logarithmic amplifier uses a successive-detection architecture. Each of the five stages has a full-wave detector; two additional high level detectors are driven by attenuators at the input to the limiting amplifiers, for a total of seven detector ...

Page 12

AD608 APPLICATIONS INFORMATION Figure 24 shows the AD608 configured for operation in a digital system at a 10.7 MHz IF. The input and output impedance of the filter are parallel terminated using 330 Ω resistors, and the conversion gain is ...

Page 13

... COPLANARITY 0.10 ORDERING GUIDE Model Temperature Range AD608AR −40°C to +85°C AD608AR-REEL −40°C to +85°C 1 AD608ARZ −40°C to +85°C 1 AD608ARZ-RL −40°C to +85°C EVAL-AD608EBZ RoHS Compliant Part. 10.00 (0.3937) 9.80 (0.3858 6.20 (0.2441) 1 5.80 (0.2283 ...

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AD608ARZ Analog Devices Inc, AD608ARZ Datasheet

AD608ARZ

Specifications of AD608ARZ

Available stocks

Related parts for AD608ARZ

AD608ARZ Summary of contents

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