|
Analog Devices |
a
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
Linear-in-dB Gain Control
MGC or AGC with RSSI Output
Quadrature Demodulator
On-Board Phase-Locked Quadrature Oscillator
Demodulates IFs from 400 kHz to 12 MHz
Can Also Demodulate AM, CW, SSB
Low Power
25 mW at 3 V
CMOS Compatible Power-Down
Interfaces to AD7013 and AD7015 Baseband Converters
APPLICATIONS
GSM, CDMA, TDMA, and TETRA Receivers
Satellite Terminals
Battery-Powered Communications Receivers
Low Power Mixer/AGC/RSSI
3 V Receiver IF Subsystem
AD607
PIN CONFIGURATION
20-Lead SSOP
(RS Suffix)
FDIN 1
20 VPS1
COM1 2
19 FLTR
PRUP 3
18 IOUT
LOIP 4
17 QOUT
RFLO 5 AD607 16 VPS2
RFHI
6
TOP VIEW
(Not to Scale)
15
DMIP
GREF 7
14 IFOP
MXOP 8
13 COM2
VMID 9
12 GAIN/RS
IFHI 10
11 IFLO
GENERAL DESCRIPTION
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, AGC
detector, 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.
The gain control input can serve as either a manual gain control
(MGC) input or an automatic gain control (AGC) voltage-
based RSSI output. In MGC operation, the AD607 accepts an
external gain-control voltage input from an external AGC detec-
tor or a DAC. In AGC operation, an onboard detector and an
external averaging capacitor form an AGC loop that holds the
IF output level at ± 300 mV. The voltage across this capacitor
then provides an RSSI output.
The I and Q demodulators provide inphase 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 de-
modulate 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.
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.
© Analog Devices, Inc., 1995
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
AD607–SPECIFICATIONS (@ TA = + 25°C, Supply = 3.0 V, IF = 10.7 MHz, unless otherwise noted)
Model
DYNAMIC PERFORMANCE
MIXER
Maximum RF and LO Frequency Range
Maximum Mixer Input Voltage
Input 1 dB Compression Point
Input Third-Order Intercept
Noise Figure
Maximum Output Voltage at MXOP
Mixer Output Bandwidth at MXOP
LO Drive Level
LO Input Impedance
Isolation, RF to IF
Isolation, LO to IF
Isolation, LO to RF
Isolation, IF to RF
IF AMPLIFIERS
Noise Figure
Input 1 dB Compression Point
Output Third-Order Intercept
Maximum IF Output Voltage at IFOP
Output Resistance at IFOP
Bandwidth
GAIN CONTROL
Gain Control Range
Gain Scaling
Gain Scaling Accuracy
Bias Current at GAIN/RSSI
Bias Current at GREF
Input Resistance at GAIN, GREF
I AND Q DEMODULATORS
Required DC Bias at DMIP
Input Resistance at DMIP
Input Bias Current at DMIP
Maximum Input Voltage
Amplitude Balance
Quadrature Error
Phase Noise in Degrees
Demodulation Gain
Maximum Output Voltage
Output Offset Voltage
Output Bandwidth
PLL
Required DC Bias at FDIN
Input Resistance at FDIN
Input Bias Current at FDIN
Frequency Range
Required Input Drive Level
Acquisition Time to ± 3°
Conditions
AD607ARS
Min Typ
For Conversion Gain > 20 dB
For Linear Operation; Between RFHI and RFLO
RF Input Terminated in 50 Ω
RF Input Terminated in 50 Ω
Matched Input, Max Gain, f = 83 MHz, IF = 10.7 MHz
Matched Input, Max Gain, f = 144 MHz, IF = 10.7 MHz
ZIF = 165 Ω, at Input Compression
–3 dB, ZIF = 165 Ω
Mixer LO Input Terminated in 50 Ω
LOIP to VMID
RF = 240 MHz, IF = 10.7 MHz, LO = 229.3 MHz
RF = 240 MHz, IF = 10.7 MHz, LO = 229.3 MHz
RF = 240 MHz, IF = 10.7 MHz, LO = 229.3 MHz
RF = 240 MHz, IF = 10.7 MHz, LO = 229.3 MHz
Max Gain, f = 10.7 MHz
IF = 10.7 MHz
IF = 10.7 MHz
ZIF = 600 Ω
From IFOP to VMID
–3 dB at IFOP, Max Gain
(See Figures 43 and 44)
Mixer + IF Section, GREF to 1.5 V
GREF to 1.5 V
GREF to General Reference Voltage VR
GREF to 1.5 V, 80 dB Span
From DMIP to VMID
IF > 3 MHz
IF ≤ 3 MHz
IF = 10.7 MHz, Outputs at 600 mV p-p, F = 100 kHz
IF = 10.7 MHz, Outputs at 600 mV p-p, F = 100 kHz
IF = 10.7 MHz, F = 10 kHz
Sine Wave Input, Baseband Output
RL ≥ 20 kΩ
Measured from IOUT, QOUT to VMID
Sine Wave Input, Baseband Output
From FDIN to VMID
Sine Wave Input at Pin 1
IF = 10.7 MHz
500
± 54
–15
–5
14
12
± 1.3
45
–16
1
30
20
40
70
17
–15
+18
± 560
15
45
90
20
75/VR
±1
5
1
1
VPOS/2
50
2
±150
±75
± 0.2
–1.2
–100
18
±1.23
10
1.5
VPOS/2
50
200
0.4 to 12
400
16.5
Max
POWER-DOWN INTERFACE
Logical Threshold
Input Current for Logical High
Turn-On Response Time
Standby Current
POWER SUPPLY
Supply Range
Supply Current
OPERATING TEMPERATURE
TMIN to TMAX
For Power Up on Logical High
To PLL Locked
Midgain, IF = 10.7 MHz
Operation to 2.7 V Minimum Supply Voltage
Operation to 4.5 V Minimum Supply Voltage
2
75
16.5
550
2.7
8.5
–25
–40
5.5
+85
+85
Specifications subject to change without notice.
Units
MHz
mV
dBm
dBm
dB
dB
V
MHz
dBm
kΩ
dB
dB
dB
dB
dB
dBm
dBm
mV
Ω
MHz
dB
mV/dB
dB/V
dB
µA
µA
MΩ
V dc
kΩ
µA
mV
mV
dB
Degrees
dBc/Hz
dB
V
mV
MHz
V dc
kΩ
nA
MHz
mV
µs
V dc
µA
µs
µA
V
mA
°C
°C
–2– REV. 0
|