TP5510 Datasheet, PDF (1/12 Pages) National Semiconductor (TI) – Full Duplex Analog Front End for Consumer Applications

February 1997
TP5510
Full Duplex Analog Front End (AFE)
for Consumer Applications
General Description
The TP5510 consists of a m-law monolithic AFE device uti-
lizing the A D and D A conversion architecture shown in
Figure 1 and a serial data interface The device is fabricat-
ed using National’s advanced double-poly CMOS process
(microCMOS)
The A D portion of the device consists of an input gain
adjust amplifier an active RC pre-filter which eliminates very
high frequency noise and a switched-capacitor band-pass
filter that rejects signals below 200 Hz and above 3400 Hz
Also included are auto-zero circuitry and a compressing
A D which samples the filtered signal and converts it to the
m-law digital format The decode portion of the device con-
sists of an expanding D A which reconstructs the analog
signal from the compressed m-law code a low-pass filter
which corrects for the sin x x response of the D A output
and rejects signals above 3400 Hz followed by a single-
ended power amplifier capable of driving low impedance
loads The device requires a 1 536 MHz 1 544 MHz or
2 048 MHz master clock bit clocks which may vary from 64
kHz to 2 048 MHz and 8 kHz frame sync pulses
Features
Y _{Complete A D and D A with filter system including}
Serial Data Interface
Encode high-pass and low-pass filter
Decode low-pass filter with sin x x correction
Active RC noise filters
m-law compatible A D and D A
Internal precision voltage reference
Internal auto-zero circuitry
Y _{m-law TP5510}
Y g_{5V operation}
Y _{Low operating power typically 60 mW}
Y _{Power-down standby mode typically 3 mW}
Y _{Automatic power-down}
Y _{TTL or CMOS compatible digital interfaces}
Y _{Maximizes PC card circuit density}
Y _{Plastic DIP and SOIC packages}
Y _{8-bit digital I O}
Y _{13-bit dynamic range}
Y _{Use with DSP processor}
Y _{Applications Tapeless Answering Machines Cordless}
Phones Cellular Radio
Connection Diagram
Dual-In-Line Package
Top View
Order Number TP5510WM
See NS Package Number M16B
Order Number TP5510N
See NS Package Number N16A
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