Integration (September 1998) is available in HTML and
PDF format. - 462KB In This Issue Special Focus on DSP/Analog Seminars
Analog and Mixed-Signal
Memory
Networking
News Briefs
Resource Guide
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Redefining system design
New TI data converters create more flexibility for designers working with DSPsThe industry's first high-speed, programmable resolution analog-to-digital (ADC) converter from Texas Instruments redefines system design for digital signal processor (DSP) applications. The programmability of the new device, the TLV1562, provides system designers with more flexibility and ultimately first-to-market DSP solutions for portable digital radios, paging systems, process and motor controls, remote sensing, automotive systems, servo controls and communications systems such as wireless local loops. Along with the TLV1562, TI also offers the TLV5613 and TLV5619, the market's fastest 12-bit voltage output digital-to-analog converters (DACs), with a settling time of only 1 micro-second. The TLV1562 The resolution and sampling speed of the TLV1562 can be set to change dynamically during operation. Any of the three following combinations can be programmed: 10 bits resolution at 2 million samples per second (MSPS), 8 bits at 3 MSPS and 4 bits at 7 MSPS. In addition, the device features a unique dual sample/hold (S/H) architecture. One input channel can be sampling while the second channel is converting analog signals. By switching between the two S/H channels, the device can output a continuous stream of digital data for long periods of time. The converter also includes an internal code-conversion capability that offloads processing tasks from the DSP for improved system performance. Most other ADCs output binary code that must be converted by a DSP into two's complement code for further processing. The TLV1562 itself converts binary code into two's complement code and outputs this directly to the DSP, eliminating the need for the DSP to expend execution cycles on code conversion. Finally, the device has a wide power supply range from 2.7 V to 5.5 V. In power-sensitive applications, such as mobile systems, the TLV1562 offers power consumption as low as 7.8 milli-amps for 2.7 V systems or 12 milli-amps for 5.5 V systems. The TLV5613 and TLV5619 The TLV5613 and TLV5619 are 12-bit DACs that have an internal amplifier for the fastest voltage outputs in the industry. Both devices can operate off of a single power supply in the range of 2.7 V to 5.5 V. The TLV5613 features an 8-bit parallel interface while the TLV5619 has a 12-bit parallel interface to the system's DSP or microprocessor. The two devices have a power-down mode and consume little power when operating. Both are well suited to applications such as battery-powered test instruments, industrial controls, machine and motion control devices, cordless telephones, speech synthesis and communications modulators. The devices come in 20-pin small outline integrated circuit (SOIC) and 20-pin thin shrink small outline (TSSOP) packages. The TLV1562 is scheduled to be available in 3Q98 from TI and authorized distributors. The two other data converters are available now. Planned pricing* is $4.50 for the TLV1562 and $3.90 for the TLV5613 and the TLV5619. * Suggested resale pricing in U.S. dollars in 1K quantity. For complete information, order: TLV5613 Data Sheet (SLAS174A), TLV5619 Data Sheet (SLAS172B) and Sine-On: Data Converters (SLYM025). See Related Product Information.
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