TCM29C18, TCM29C19, TCM129C18, TCM129C19

ANALOG INTERFACE FOR DSP

SCTS021D –AUGUST 1987 –REVISED OCTOBER 1996

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POST OFFICE BOX 655303

– Operating Mode...80 mW

– Power-Down Mode...5 mW

Over Frequency Range of 0 Hz to 50 kHz

Sample, Hold, and Autozero Functions

Associated Filters

description

The TCM29C18, TCM29C19, TCM129C18, and

TCM129C19 are low-cost single-chip PCM

codecs (pulse-code-modulated encoders and

decoders) and PCM line filters. These devices

incorporate both the A/D and D/A functions, an

antialiasing filter (A/D), and a smoothing filter

(D/A). They are ideal for use with the TMS320

DSP family members, particularly those featuring

a serial port such as the TMS32020, TMS32011,

and TMS320C25.

Primary applications include:

These devices are designed to perform encoding of analog input signals (A/D conversion) and decoding of

digital PCM signals (D/A conversion). They are useful for implementation in the analog interface of a digital

signal processing system. Both devices also provide band-pass filtering of the analog signals prior to encoding,

and smoothing after decoding.

The TCM29C18 and TCM29C19 are characterized for operation over the temperature range of 0

°C to 70°C.

The TCM129C18 and TCM129C19 are characterized for operation over the temperature range of

–40

°C to 85°C.

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Copyright

© 1996, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

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VBB

PWRO +

PWRO –

PDN

DCLKR

PCM IN

FSR/TSRE

DGTL GND

VCC

GSX

ANLG IN

ANLG GND

TSX/DCLKX

PCM OUT

FSX/TSXE

CLK

DW OR N PACKAGE

(TOP VIEW)

FEATURES TABLE

Number of Pins:

16

Fixed Mode:

2.048 MHz (TCM29C18, TCM129C18),

1.536 MHz (TCM29C19, TCM129C19)

Coding Law:

µ-Law

Variable Mode:

64 kHz to 2.048 MHz

8-Bit Resolution

12-Bit Dynamic Range