Low Power Mixer
3 V Receiver IF Subsystem
a
AD607
PIN CONFIGURATION
FEATURES
Complete Receiver-on-a-Chip: Monoceiver® Mixer
–15 dBm 1 dB Compression Point
–8 dBm Input Third Order Intercept
500 MHz RF and LO Bandwidths
Linear IF Amplifier
20-Lead SSOP
(RS Suffix)
1
2
20
19
18
17
16
15
14
13
12
11
Linear-in-dB Gain Control
Manual Gain Control
Quadrature Demodulator
On-Board Phase-Locked Quadrature Oscillator
Demodulates IFs from 400 kHz to 12 MHz
Can Also Demodulate AM, CW, SSB
Low Power
VPS1
FLTR
IOUT
QOUT
VPS2
DMIP
IFOP
COM2
GAIN
IFLO
FDIN
COM1
PRUP
LOIP
3
4
5
RFLO
RFHI
AD607
TOP VIEW
(Not to Scale)
6
7
GREF
MXOP
VMID
IFHI
25 mW at 3 V
8
CMOS Compatible Power-Down
Interfaces to AD7013 and AD7015 Baseband Converters
9
10
APPLICATIONS
GSM, CDMA, TDMA, and TETRA Receivers
Satellite Terminals
Battery-Powered Communications Receivers
GENERAL DESCRIPTION
The I and Q demodulators provide in-phase and quadrature
baseband outputs to interface with Analog Devices’ AD7013
(IS54, TETRA, MSAT) and AD7015 (GSM) baseband con-
verters. A quadrature VCO phase-locked to the IF drives the I
and Q demodulators. The I and Q demodulators can also
demodulate AM; when the AD607’s quadrature VCO is phase-
locked to the received signal, the in-phase demodulator becomes
a synchronous product detector for AM. The VCO can also be
phase-locked to an external beat-frequency oscillator (BFO),
and the demodulator serves as a product detector for CW or
SSB reception. Finally, the AD607 can be used to demodulate
BPSK using an external Costas Loop for carrier recovery.
The AD607 is a 3 V low power receiver IF subsystem for opera-
tion at input frequencies as high as 500 MHz and IFs from
400 kHz to 12 MHz. It consists of a mixer, IF amplifiers, I and
Q demodulators, a phase-locked quadrature oscillator, and a
biasing system with external power-down.
The AD607’s low noise, high intercept mixer is a doubly
balanced Gilbert cell type. It has a nominal –15 dBm input
referred 1 dB compression point and a –8 dBm input referred
third order intercept. The mixer section of the AD607 also
includes a local oscillator (LO) preamplifier, which lowers the
required LO drive to –16 dBm.
In MGC operation, the AD607 accepts an external gain-control
voltage input from an external AGC detector or a DAC.
Monoceiver is a registered trademark of Analog Devices, Inc.
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, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
www.analog.com
© Analog Devices, Inc., 2002