HSP50110
Data Sheet
January 1999
File Number 3651.4
Digital Quadrature Tuner
Features
The Digital Quadrature Tuner (DQT) provides many of the
functions required for digital demodulation. These functions
include carrier LO generation and mixing, baseband
sampling, programmable bandwidth filtering, baseband AGC,
and IF AGC error detection. Serial control inputs are provided
which can be used to interface with external symbol and
carrier tracking loops. These elements make the DQT ideal
for demodulator applications with multiple operational modes
or data rates. The DQT may be used with HSP50210 Digital
Costas Loop to function as a demodulator for BPSK, QPSK,
8-PSK OQPSK, FSK, FM, and AM signals.
• Input Sample Rates to 52 MSPS
• Internal AGC Loop for Output Level Stability
• Parallel or Serial Output Data Formats
• 10-Bit Real or Complex Inputs
• Bidirectional 8-Bit Microprocessor Interface
• Frequency Selectivity <0.013Hz
• Low Pass Filter Configurable as Three Stage Cascaded-
Integrator-Comb (CIC), Integrate and Dump, or Bypass
• Fixed Decimation from 1-4096, or Adjusted by NCO
Synchronization with Baseband Waveforms
The DQT processes a real or complex input digitized at rates
up to 52 MSPS. The channel of interest is shifted to DC by a
complex multiplication with the internal LO. The quadrature
LO is generated by a numerically controlled oscillator (NCO)
with a tuning resolution of 0.012Hz at a 52MHz sample rate.
The output of the complex multiplier is gain corrected and fed
into identical low pass FIR filters. Each filter is comprised of a
decimating low pass filter followed by an optional
• Input Level Detection for External IF AGC Loop
• Designed to Operate with HSP50210 Digital Costas Loop
• 84 Lead PLCC
Applications
compensation filter. The decimating low pass filter is a 3
stage Cascaded-Integrator-Comb (CIC) filter. The CIC filter
can be configured as an integrate and dump filter or a third
order CIC filter with a (sin(X)/X)3 response. Compensation
filters are provided to flatten the (sin(X)/X)N response of the
CIC. If none of the filtering options are desired, they may be
bypassed. The filter bandwidth is set by the decimation rate of
the CIC filter. The decimation rate may be fixed or adjusted
dynamically by a symbol tracking loop to synchronize the
output samples to symbol boundaries. The decimation rate
may range from 1-4096. An internal AGC loop is provided to
maintain the output magnitude at a desired level. Also, an
input level detector can be used to supply error signal for an
external IF AGC loop closed around the A/D.
• Satellite Receivers and Modems
• Complex Upconversion/Modulation
• Tuner for Digital Demodulators
• Digital PLL’s
• Related Products: HSP50210 Digital Costas Loop;
A/D Products HI5703, HI5746, HI5766
• HSP50110/210EVAL Digital Demod Evaluation Board
Ordering Information
TEMP.
o
PART NUMBER
HSP50110JC-52
HSP50110JI-52
RANGE ( C)
0 to 70
PACKAGE
84 Ld PLCC
84 Ld PLCC
PKG. NO.
N84.1.15
N84.1.15
The DQT output is provided in either serial or parallel formats
to support interfacing with a variety DSP processors or digital
filter components. This device is configurable over a general
purpose 8-bit parallel bidirectional microprocessor control bus.
-40 to 85
Block Diagram
LOOP
FILTER
LEVEL
DETECT
COMPLEX
MULTIPLIER
GCA
10
10
LOW PASS FIR
FILTER
I DATA
o
90
REAL OR COMPLEX
o
CARRIER
TRACKING CONTROL
0
NCO
INPUT DATA
10
LOW PASS FIR
FILTER
10
Q DATA
GCA
DUMP
IF AGC
LEVEL
SAMPLE STROBE
CONTROL
DETECT
PROGRAMMABLE
RE-SAMPLING
NCO
CONTROL
SAMPLE RATE
CONTROL
CONTROL/STATUS
BUS
8
INTERFACE
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
3-229
5秒后页面跳转
解析光耦仿真器：升级光耦合器技术的必要性
英伟达新一代Blackwell GPU过热问题致交付延迟
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
