AD6190 Analog Devices, AD6190 Datasheet

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AD6190

Manufacturer Part Number
AD6190
Description
900 MHz RF Transceiver
Manufacturer
Analog Devices
Datasheet
a
GENERAL DESCRIPTION
The AD6190 900 MHz RF Transceiver provides a complete
RF/IF section for systems operating in the 902 MHz–928 MHz
license-free ISM band. The high level of integration allows several
dozen discrete components to be replaced. It is ideally suited
for use in cordless telephone and wireless data applications.
REV. 0
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
Complete 900 MHz RF Transceiver
On-Chip Low Dropout Regulator
Independent Sleep Modes for TX, RX
28-Lead SSOP Package
APPLICATIONS
902 MHz–928 MHz ISM Band Cordless Telephones
902 MHz–928 MHz ISM Band Wireless Data Systems
LNA
Receive Mixer
Transmit Mixer
Driver Amplifier
VCO
Prescaler
Limiter Amplifier with RSSI
FILTER
S/W
ANT
T/R
PA
VREG
FUNCTIONAL BLOCK DIAGRAM
VCO
64/65
15MHz SYNTHESIZER
/2
I
Q
The receiver section includes a Low Noise Amplifier (LNA).
The LNA’s output drives an image-reject mixer; the mixer’s
output optimized for 10.7 MHz is filtered and processed by the
limiting IF amplifier.
The transmit section accepts a modulated 10.7 MHz IF input,
and uses an image-reject upconverter to mix the signal up to the
902 MHz–928 MHz RF carrier frequency while suppressing the
unwanted image and LO components. The RF output is raised
to a nominal 0.5 milliwatt (–3 dBm) output level. This output
can be used directly or can drive an external power amplifier to
higher levels.
The on-chip VCO operates at 2 the local oscillator frequency.
This reduces oscillator pulling due to strong interferers in-band
or transmitter leakage. An on-chip 64/65 prescaler allows the
VCO to be controlled by a low cost 15 MHz CMOS synthesizer.
An on-chip low dropout regulator minimizes VCO pushing. The
transmit section, receive section, or both, can be placed in a low
current SLEEP mode when not in use. The AD6190 900 MHz
RF transceiver is packaged in a 28-lead SSOP package.
The AD6190 900 MHz RF Transceiver is part of the Analog
Devices/Zilog “A-to-Z Phone” Spread-Spectrum System for
cordless telephone and data communications applications. Con-
tact Zilog directly at (408) 370-8000 for more information on
the Z87000 series baseband controller chips.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
AD6190
0
90
0
90
10.7
MANAGEMENT
REGULATOR
CONTROL
VOLTAGE
POWER
AND
10.7
900 MHz RF Transceiver
World Wide Web Site: http://www.analog.com
10.7
VCOON
LIMOUT
TXON
RXON
RSSI
VBATT
VREG
CONTROLLER
SPECTRUM
SPREAD-
Z87L00
© Analog Devices, Inc., 1998
AD6190

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AD6190 Summary of contents

Page 1

... An on-chip low dropout regulator minimizes VCO pushing. The transmit section, receive section, or both, can be placed in a low current SLEEP mode when not in use. The AD6190 900 MHz RF transceiver is packaged in a 28-lead SSOP package. The AD6190 900 MHz RF Transceiver is part of the Analog Devices/Zilog “ ...

Page 2

... AD6190–SPECIFICATIONS Parameter RECEIVE RF SECTION (LNA to Mixer Output) Power Gain Noise Figure 1 dB Compression (Input) Input IP3 Image Rejection TRANSMIT UPCONVERTER Image Rejection LO Feedthrough DRIVER AMPLIFIER Nominal Output Power 1 dB Compression VCO Operating Frequency PRESCALER Division Ratio PREMOD = “1” PREMOD = “0” ...

Page 3

... 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 AD6190 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 ...

Page 4

... Prescaler Modulus control (HIGH = divide-by-64; LOW = divide-by-65). PIN CONFIGURATION PREMOD PREOUT 1 28 VCOON TXON 2 27 VBATT 3 VCCTX 26 VBASE RFOUT 4 25 PAGND TANK 5 24 GND LIMOUT 6 23 AD6190 TANK+ GND 7 22 TOP VIEW (Not to Scale) RSSI 8 VCCLNA 21 TXIF 9 RFIN 20 VREG LNAGND 10 19 LNAGND RXON 11 18 LIMIN 12 17 ...

Page 5

... C 915MHz –45 –35 –25 –15 CENTER 915.0 MHz #RES BW 10 kHz Tek Run: 4.00GS/s ET Average –45 –35 –25 –15 Ch1 10.0mV –5– AD6190 –15 – TEMPERATURE – C MKR 915.0 MHz 0.0 dBm MARKER 915.0 MHz 0.0 dBm L ...

Page 6

... V dc. All 10.7 MHz IF filters are assumed to be standard 330 ance ceramic types. The AD6190 RX IF signal chain and TX IF input includes internal matching resistors for this impedance. When used with the Zilog Z87L00 Spread-Spectrum Controller IC, the 10 ...

Page 7

... PLLs, and is usually ac- coupled through capacitor to the PLL input. Layout, Grounding and Decoupling The AD6190 is a complex device with high bandwidth and high gain on-chip. Proper layout, grounding and decoupling, tech- niques are essential to realizing the full performance of the sys- tem ...

Page 8

... The AD6190 is designed as a time-division-duplex (TDD) radio. This means that the transmitter and receiver operate at different times. The AD6190 includes control pins to shut down unused portions of the circuit when not needed, saving power, as shown in the table below. For any mode except “Sleep,” ...

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