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Sony Semiconductor Electronic Components Datasheet

CXD1958Q Datasheet

MMDS TCM/QAM Demodulator + FEC + ADC

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CXD1958Q pdf
CXD1958Q
MMDS TCM/QAM Demodulator + FEC + ADC Preliminary
Description
The CXD1958Q is an integrated TCM/QAM
demodulator for MMDS systems using the DAVIC
MMDS standard. This highly integrated device
incorporates an internal 8-bit ADC, image rejection
and root-raised cosine filters, all-digital symbol timing
recovery PLL, adaptive decision feedback equalizer
(DFE) with 10 feedforward and 30 feedback taps, 4-D
TCM decoder, and DAVIC/DVB compliant forward
error correction comprising (204,188) Reed Solomon
decoder, a programmable de-interleaver with I = 12
and I = 204, and a de-randomiser. All internal clocks
are generated from a single external 30MHz reference
crystal.
Device functionality also includes 3-wire bus interface
for configuring up to 2 tuner synthesizers, a sigma
delta tuner IF-AGC output, a user programmable RF-
AFC sigma delta output, spectrum inversion of the
received signal for tuner compatibility, and a highly
configurable MPEG2-TS interface. An I2C bus
interface provides on-board configuration and status
monitoring of various functions including access to
the equalizer tap values and constellation points.
JTAG provides boundary scan test compatibility.
Features
DAVIC MMDS V1.1 and V1.3 compliant
Supports 16, 64 and 256QAM
Supports 16, 64 and 256 TCM
Internal 8-bit ADC
Interface for 10-bit external ADC
36.125MHz nominal IF input
Symbol rate range 5 – 5.304Mbaud in 6MHz
channels
Integrated matched filtering with 0.15 roll-off factor
±400KHz internal carrier offset compensation with
negligible losses @ 5Mbaud 6MHz channel
Symbol timing loop designed to acquire with large
offsets. Negligible losses for ±100ppm offsets
100 pin QFP (Plastic)
All internal clocks derived from single fixed
frequency crystal (30MHz)
Supports fast re-acquisition mode
6µs echo cancellation @ 5Mbaud
Constellation points and equalizer tap values
readable via I2C bus
C/N estimation readable via I2C bus
Low implementation loss for AWGN only:
0.5dB @ 64QAM (using internal 8-bit A/D);
0.3dB @ 256QAM (excluding A/D);
measured at BER of 3x10–4 Pre R/S
I = 12 and I = 204 de-interleaving
Fast I2C bus compatible control interface
Tuner IF-AGC output
User programmable tuner RF-AGC output
Dedicated 3-wire bus interface to configure up to 2
tuner synthesizers
3.3V CMOS technology
Supports JTAG boundary scan
100-pin QFP package
Applications
MMDS set-top boxes
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
PE99906-PS


Sony Semiconductor Electronic Components Datasheet

CXD1958Q Datasheet

MMDS TCM/QAM Demodulator + FEC + ADC

No Preview Available !

CXD1958Q pdf
Pin Configuration
CXD1958Q
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81
TEVAL9 1
TEVAL8 2
TEVAL7 3
TEVAL6 4
TEVAL5 5
DVDD 6
DVSS 7
TEVAL4 8
TEVAL3 9
TEVAL2 10
TEVAL1 11
TEVAL0 12
DVDD 13
DVSS 14
TDO 15
TSVALID 16
TSLOCK 17
DVDD 18
DVSS 19
TSERR 20
TSDATA7 21
TSDATA6 22
TSDATA5 23
TSDATA4 24
DVDD 25
DVSS 26
TSDATA3 27
TSDATA2 28
TSDATA1 29
TSDATA0 30
80 AVSS
79 AVDD
78 AVDD
77 VRBS
76 VRB
75 VIN
74 VRT
73 VRTS
72 AVDD
71 AVDD
70 AVDD
69 AVSS
68 AVSS
67 DVSS
66 XTALI
65 XTALO
64 DVDD
63 DT9
62 DT8
61 DT7
60 DT6
59 DT5
58 DVSS
57 DVDD
56 DT4
55 DT3
54 DT2
53 DT1
52 DT0
51 DVDD
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
Fig. 1. Pin Configuration
–2–


Part Number CXD1958Q
Description MMDS TCM/QAM Demodulator + FEC + ADC
Maker Sony Corporation
Total Page 30 Pages
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