New Analog-to-Digital Converters

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New Analog-to-Digital Converters Expand Texas Instruments Digital Signal Processing Solutions Portfolio for Cellular Phones and Consumer Electronics

DALLAS (Dec. 9, 1996) -- New, high-performance, low-power analog-to-digital converters (ADCs) are now available from Texas Instruments (TI), the world's leading provider of digital signal processing solutions. These devices, developed with TI's Complementary Metal Oxide Semiconductor (CMOS) technology, offer a direct interface to TI's line of TMS320 digital signal processors (DSPs) and are ideal in applications such as cellular phones, pagers and personal digital assistants (PDAs).

The new ADCs, designated the TLV1544 and the TLV1548, operate from a wide supply voltage and convert analog input signals into 10-bit resolution digital format representation at 85KSPS. These ADCs have a direct 3-wire interface to the serial port of a synchronous serial peripheral interface (SPI) compatible microprocessor. The TLV1544 and the TLV1548 are designed to operate for a wide range of supply voltage with only 1mA supply current. The power saving feature is further enhanced with a software-programmed power-down mode and conversion rate. In addition to high-speed analog to digital conversion and versatile control capability, the TLV1548 has an on-chip 11-channel multiplexer (MUX) that can select any one of eight analog inputs or any one of three internal self-test voltages. The TLV1544 has four analog inputs.

Features/Benefits

1mA operating and 1uA power-down typical	Allows low power operation.
Glueless DSP/SPI uP interface	Provides built-in framesync and flexible timing.
Wide supply voltage (2.7V-5.5V)	Extends battery life for portable design and simplifies system design.
Extended sampling mode	Provides flexibility to interface with wide range of inputs.
Flexible serial interface timing	Simplifies system design.
Powerdown capability	Further reduces the system power consumption.
Programmable conversion speed	Tailors the performance to a specific power budget.
Built-in test mode	Enhances system testability.
Built-in 11-to-1 MUX	Lowers system cost.
Built-in clock	Lowers system cost and simplifies design.
Smaller package	Fits in smaller forms for portable designs.

End Equipment Applications

Applications for the TLV1544 and the TLV1458 include:

Cellular phones
Consumer electronics
Pagers
PDAs
Color printers
Portable industrial data acquisition
Remote sensing

Pricing, Packaging and Availability

The TLV1544 and the TLV1548 are now available from Texas Instruments and its authorized distributors. The TLV1544 is in a 16-pin small-outline integrated circuit (SOIC) package and the TLV1548 is in a 20-pin shrink small-outline package (SSOP). The TLV1544 is priced at $3.25 and the TLV1548 is priced at $3.64, both in quantities of 1,000.

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