AD6630AR-REEL AD [Analog Devices], AD6630AR-REEL Datasheet

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AD6630AR-REEL

Manufacturer Part Number
AD6630AR-REEL
Description
Differential, Low Noise IF Gain Block with Output Clamping
Manufacturer
AD [Analog Devices]
Datasheet
a
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.
PRODUCT DESCRIPTION
The AD6630 is an IF gain block designed to interface between
SAW filters and differential input analog-to-digital converters.
The AD6630 has a fixed gain of 24 dB and has been optimized
for use with the AD6600 and AD6620 in digitizing narrowband
IF carriers in the 70 MHz to 250 MHz range.
Taking advantage of the differential nature of SAW filters, the
AD6630 has been designed as a differential in/differential out
gain block. This architecture allows 100 dB of adjacent channel
blocking using low cost SAW filters. The AD6630 provides
output limiting for ADC and SAW protection with 10 phase
variation in recovery from overdrive situations.
Designed for “narrow-band” cellular/PCS receivers, the high
linearity and low noise performance of the AD6630 allows for
implementation in a wide range of applications ranging from
FEATURES
24 dB Gain
4 dB Noise Figure
Easy Match to SAW Filters
Output Limiter Adjustable +8.5 dBm to +12 dBm
700 MHz Bandwidth
10 V Single or Dual 5 V Power Supply
300 mW Power Dissipation
APPLICATIONS
ADC IF Drive Amp
Communications Receivers
PCS/Cellular Base Stations
GSM, CDMA, TDMA
OSCILLATOR
LOCAL
Figure 1. Reference Design
AD6630
AD6630
GSM to CDMA to AMPS. The clamping circuitry also main-
tains the phase integrity of an overdriven signal. This allows
phase demodulation of single carrier signals with an overrange
signal.
While the AD6630 is optimized for use with the AD6600 Dual
Channel, Gain Ranging ADC with RSSI, it can also be used in
many other IF applications. The AD6630 is designed with an
input impedance of 200
cal application shown below, these values match the real portion
of a typical SAW filter. Other devices can be matched using
standard matching network techniques.
The AD6630 is built using Analog Devices’ high speed comple-
mentary bipolar process. Units are available in a 300 mil SOIC
(16 leads) plastic surface mount package and specified to operate
over the industrial temperature range (–40 C to +85 C).
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
Differential, Low Noise IF Gain
Block with Output Clamping
DIVERSITY
MAIN
FUNCTIONAL BLOCK DIAGRAM
AD6600
CLLO
CLHI
IP2
IP1
IP1
IP2
NC
NC
World Wide Web Site: http://www.analog.com
1
2
3
4
5
6
7
8
AD6620
AD6620
NC = NO CONNECT
and an output of 400 . In the typi-
AD6630
+
+
+
DSP
© Analog Devices, Inc., 1998
16
15
14
13
12
11
10
9
V
CD1
OP
V
CMD
OP
CD2
V
CC
EE
CC
AD6630

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AD6630AR-REEL Summary of contents

Page 1

FEATURES 24 dB Gain 4 dB Noise Figure Easy Match to SAW Filters Output Limiter Adjustable +8.5 dBm to +12 dBm 700 MHz Bandwidth 10 V Single or Dual 5 V Power Supply 300 mW Power Dissipation APPLICATIONS ADC ...

Page 2

AD6630–SPECIFICATIONS NORMAL OPERATING CONDITIONS Parameter (Conditions) SINGLE SUPPLY VOLTAGE POSITIVE SUPPLY VOLTAGE NEGATIVE SUPPLY VOLTAGE AMBIENT TEMPERATURE PACKAGE THERMAL RESISTANCE 1 OPERATING FREQUENCY (T = – MIN DC SPECIFICATIONS Inputs should be AC coupled.) Parameter SUPPLY CURRENT OUTPUT ...

Page 3

... ESD Protection 1 Model Temperature Range AD6630AR – +85 C (Ambient) AD6630AR-REEL – +85 C (Ambient) AD6630R/PCB 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 AD6630 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges ...

Page 4

AD6630 PIN FUNCTION DESCRIPTION Pin No Pin Name Description Connect 3 IP2 Input 4 IP1 Input IP1 5 Input IP2 6 Input 7 CLLO Clamp Level Low Pin 8 CLHI Clamp Level High Pin 9 V ...

Page 5

... SAW filter becomes real. EVALUATION BOARD Figures 9, 10 and 12 refer to the schematic and layout of the AD6630AR as used on Analog Devices’ GSM Diversity Re- ceiver Reference Design (only the IF section is shown). Figure 14 references the schematic of the stand-alone AD6630 evalua- ( ...

Page 6

AD6630 SMA CHNA L1A SAW1 Figure 9. Reference Design Schematic (One Channel) Figure 10. Reference Design PCB Layout + + DIFF AMP – ...

Page 7

J6 SMA SMA 470nH 4 3 TC4–1W C1 AGND AT224 10nF AGND Frequency (MHz) 70 170 200 250 REV PCTB3 3 AGND C18 – ...

Page 8

AD6630 0.0118 (0.30) 0.0040 (0.10) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 16-Lead Wide Body SOIC (R-16) 0.4133 (10.50) 0.3977 (10.00 0.1043 (2.65) PIN 1 0.0291 (0.74) 0.0926 (2.35) 0.0098 (0.25) 0.0500 (1.27) 8 0.0500 ...

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