MAX2101CMQ Maxim Integrated Products, MAX2101CMQ Datasheet

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MAX2101CMQ

Manufacturer Part Number
MAX2101CMQ
Description
6-bit quadrature digitizer.
Manufacturer
Maxim Integrated Products
Datasheet

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MAX2101CMQ
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The MAX2101 6-bit quadrature digitizer combines quad-
rature demodulation with analog-to-digital conversion on
a single bipolar silicon die. This unique RF-to-Bits
function bridges the gap between existing RF downcon-
verters and CMOS digital signal processors (DSPs).
The MAX2101’s simple receiver subsystem is designed
for digital communications systems such as those used
in DBS, TVRO, WLAN, and other applications.
The MAX2101 accepts input signals from 400MHz to
700MHz and applies adjustable gain, providing at least
40dB of dynamic range.
Each baseband is filtered by an on-chip, 5th-order
Butterworth lowpass filter, or the user can select an
external filter path. Baseband sample rate is 60Msps.
The MAX2101 is available in a commercial temperature
range, 100-pin MQFP package.
________________________Applications
19-0298; Rev 4; 5/96
TM
__________________________________________________T ypical Application Circuit
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
_______________General Description
RF-to-Bits is a registered trademark of Tektronix, Inc.
X/KU BAND
QUADRATURE
GENERATION
Recovery of PSK and QAM Modulated RF Carriers
Direct-Broadcast Satellite (DBS) Systems
Television Receive-Only (TVRO) Systems
Cable Television (CATV) Systems
Wireless Local Area Networks (WLANs)
612MHz PHASE LOCKED
LOW-NOISE BLOCK
________________________________________________________________ Maxim Integrated Products
LOW-NOISE AMPLIFIER
H POLARIZATION
V POLARIZATION
90°
DIV-16
LOCAL OSCILLATOR
MAX2101
950MHz to 2000MHz
CONVERSION
A/D
TM
6-Bit Quadrature Digitizer
____________________________Features
L-BAND DOWNCONVERTER
______________Ordering Information
MAX2101CMQ
ADCs Provide Greater than 5.5 Effective Bits at
f
Fully Integrated Lowpass Filters with
Externally Variable Bandwidth (10MHz to 30MHz)
40dB Dynamic Range
Integrated VCO and Quadrature Generation
Network for I/Q Demodulation
Divide-by-16 Prescaler for Oscillator PLL
Programmable Counter for Variable Sample Rates
Signal-Detection Function
Selectable Offset Binary or Twos-Complement
Output Data Format
Automatic Baseband Offset Cancellation
S
PART
LOCAL OSCILLATOR
MATCHED
= 60Msps, f
FILTERS
RECOVERY
CARRIER
CLOCK
IN
AND
= 15MHz
TEMP. RANGE
0°C to +70°C
(NARROW BAND)
CORRECTION
DETECTION
ERROR
AND
600MHz
DSP POST PROCESSING
MISCELLANEOUS
PIN-PACKAGE
100 MQFP
DSP
1

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MAX2101CMQ Summary of contents

Page 1

... Network for I/Q Demodulation Divide-by-16 Prescaler for Oscillator PLL Programmable Counter for Variable Sample Rates Signal-Detection Function Selectable Offset Binary or Twos-Complement Output Data Format Automatic Baseband Offset Cancellation ______________Ordering Information PART MAX2101CMQ 950MHz to 2000MHz LOCAL OSCILLATOR L-BAND DOWNCONVERTER MATCHED FILTERS A/D CONVERSION MAX2101 ...

Page 2

Quadrature Digitizer ABSOLUTE MAXIMUM RATINGS Supply Voltage Ranges (Note 1) V ...................................................................(-0.3V to +6.5V .....................................................................(V INA V ....................................................................(V IND Note 1: The digital control inputs are diode protected; however, permanent damage may occur on unconnected units under ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 4.75V to 5.25V +25°C, unless otherwise noted PARAMETER Power Detect Output Minimum Power Detect Output Maximum ADC LSB Size ADC Amplitude Response Match ADC Input Offset ADC Differential Nonlinearity ADC Integral ...

Page 4

Quadrature Digitizer ELECTRICAL CHARACTERISTICS (continued 4.75V to 5.25V +25°C, unless otherwise noted PARAMETER AC SPECIFICATIONS (GND = System Ground Port Dynamic Range (Notes Port VSWR (Note 6) IF ...

Page 5

TIMING CHARACTERISTICS (V = system ground GND CCA CCD PARAMETER Data Clock Period (Figure 2) Propagation Delay, Clock to Data (Figure 2) Data Output Skew (all 12 outputs) Settled within 20% (Figure 2) Aperture Delay Relative to ...

Page 6

Quadrature Digitizer ____________________________T ypical Operating Characteristics (continued 5V +25°C, unless otherwise noted VREF (PIN 88) VOLTAGE vs. SUPPLY VOLTAGE 1.215 1.214 1.213 1.212 1.211 1.210 4.75 4.85 4.95 5.05 5.15 5.25 V (V) ...

Page 7

Operating Characteristics (continued 5V +25°C, unless otherwise noted 100m 50m 0 -50m -100m -150m RF SIGNAL PATH GAIN vs. AGC (PIN 93) VOLTAGE 624MHz 5.1MHz BB ...

Page 8

Quadrature Digitizer ______________________________________________________________Pin Description PIN NAME FUNCTION 1, 9, 12, 13, 18, 19, 63, 67, GND Ground 82, 83, 89, 92, 98 VGNDQ Q Channel Baseband Ground Q Channel Baseband Amplifier, 3 BBINQ External Input Q Channel ...

Page 9

Description (continued) PIN NAME FUNCTION I Channel Baseband Amplifier, 78 BBINI External Input 79 VGNDI I Channel Baseband Ground High Impedance, connect to VREF 80 VREFIN (pin 88) 81 MIXOUTI I Channel Mixer Output 84 VSUBRF RF Demodulator Substrate ...

Page 10

Quadrature Digitizer V CC GAIN ADJUST 2k 0. INPUT SIGNAL 400MHz to 700MHz 0.01 F 2.2k 20k 1 ⁄ 2 0.01 F MAX407 4k 20k 5.6k MAX407 0. 20k 2k FILTER TUNE PHASE-LOCKED LOOP ...

Page 11

ANALOG INPUT t APERTURE DATA CLOCK DATA OUT NOTE: DATA IS VALID ON THE RISING EDGE OF DCLK. Figure 2. Baseband Signal, Sample/Data Clock, and Digitized Data Timing AGC IFIN (PIN 93) (PIN 90) AGC 40dB to 0dB IFINB (PIN ...

Page 12

Quadrature Digitizer REFERENCE AMPLIFIER FULL-SCALE/2 – COMMON MODE + BASEBAND CHANNEL I VREF (PIN 88) BANDGAP REFERENCE VPTAT (PIN 97) BASEBAND CHANNEL Q COMMON MODE FULL-SCALE/2 REFERENCE AMPLIFIER Figure 4. Functional Diagram—MAX2101 ADCs and Supporting Sections The MAX2101 integrates ...

Page 13

FILTER CUTOFF FREQUENCY vs. FTUNE +25° 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 FTUNE (V) Figure 6. Typical Filter Cutoff Frequency vs. FTUNE Input Voltage The MAX2101 provides ...

Page 14

Quadrature Digitizer DACA R S VREF (PIN 88) 1 ⁄ 2.2k 4 MAX418 R TC VPTAT (PIN 97) 5.6k R 4.7k DACB Figure 8. Independent Filter Tune Control Using Two Voltage-Output DACs I SET 0.3mA to 1mA VPTAT (PIN ...

Page 15

Filter Temperature Compensation In both techniques discussed above, the ratio R mines the compensation required to produce a filter response with 0TC. As noted in the VPTAT vs. Temperature graph in the Typical Operating Characteristics , this ratio should be ...

Page 16

Quadrature Digitizer 72 71 CIB CI 150k 76 OFFI 150k 68 ENOPB MAX2101 150k 5 OFFQ 150k CQB Figure 10. Offset Correction Network Digital Signal Interfacing The single-ended, LS-TTL compatible data outputs from the ADCs are ...

Page 17

IFIN (PIN 90 Figure 12. Equivalent Input Network At frequencies of interest, C will add a small phase PAD error to the impedance term. The inductance L els the bond wire and lead frame in series with ...

Page 18

Quadrature Digitizer (-47dBm to -7dBm 600MHz) S Figure 14. Example of Input Network to Minimize VSWR and Noise Figure ments were calculated assuming a 600MHz source fre- quency. Capacitor C provides an ...

Page 19

TNKA (PIN 17 Figure 15. Simplified Input Network for VCO Resonator Ports performance in the specification, the resonant network should exhibit a loaded Q greater than 20. The resonating inductor L should exhibit as high a ...

Page 20

Quadrature Digitizer DBS System Application A direct-broadcast satellite (DBS) receiver consists of an antenna to receive the X/Ku band carrier from the satellite, a low-noise block (LNB), an L-band downcon- verter, and a quadrature demodulator. The system stages include ...

Page 21

Configuration TOP VIEW 1 GND 2 VGNDQ 3 BBINQ 4 FTUNEQ 5 OFFQ 6 BBOUTQ 7 BBOUTQB 8 VCCQ GND 9 10 VGNDP 11 VCCP 12 GND 13 GND 14 TNKB 15 VCC2 16 VGND2 17 TNKA 18 GND ...

Page 22

Quadrature Digitizer ________________________________________________________Package Information PIN # BASE e B PLANE 22 ______________________________________________________________________________________ 0.40 0.016 MIN. R 0.012 DETAIL "A" 0.005 0° MIN DATUM PLANE R 0.012 L 0.005 MIN. ...

Page 23

Quadrature Digitizer 23 ...

Page 24

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 24 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 1996 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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