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Mixed-Signal and Analog Products Industry's First Programmable Resolution Analog-To-Digital Converter Redefines DSP System Design Choice, Not Compromise for Your DSP Solution Texas Instruments' TMS320 DSP-Compatible Data Converters
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Industry's First Programmable Resolution Analog-To-Digital Converter Redefines DSP System Design
Texas Instruments Introduces New Data Converters Targeting DSP Applications
The resolution and sampling speed of the programmable ADC, designated 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. In certain applications, such as communications systems, continuous output is critical. In contrast, other applications may be more interrupt-driven. Network file servers, for example, must quickly respond to interrupts. In this case, the TLV1562's dual S/H channels can be configured to minimize interrupt latency and assure optimal server performance. 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 1562 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. In addition to this device, TI is introducing two other data converters -- one optimized for use with its TMS320 line of DSPs and the other for use with 8-bit microcontrollers. TLV5613 and TLV5619: Fastest Voltage Output DACs in the Industry 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 5613 features an eight-bit parallel interface while the 5619 has a 12-bit parallel interface to the system's DSP or microprocessor. The 5613 and 5619 have a power-down mode and consume little power when operating. The devices come in a 20-pin small outline integrated circuit (SOIC) package and a 20-pin thin shrink small outline package (TSSOP). Both devices are well suited to applications such as battery-powered test instruments and industrial controls, machine and motion control devices, cordless telephones, speech synthesis and communications modulators.
TI offers a data converter choice for all its DSP platforms -- C2000, C5000 and C6000 -- and ultimately for every DSP application. Please see the enclosed backgrounder (SC-98053B) and fact sheet (SC-98053C) for a full description of TI's TMS320-compatible data converter product line. More information on TI's line of data converter products is available online at Pricing and Availability The TLV1562 is scheduled to be available in the third quarter from Texas Instruments and its authorized distributors. The other data converters are available now. Suggested resale pricing in quantities of 1,000 is planned to be $4.50 for the TLV1562, $3.90 for the TLV5613, and $3.90 for the TLV5619.
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DALLAS (July 6, 1998) -- The industry's first high-speed, programmable resolution analog-to-digital (ADC) converter from Texas Instruments (TI) redefines system design for digital signal processor (DSP) applications. To system designers, programmability means 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. In addition, TI today introduced the market's fastest 12-bit voltage output digital-to-analog converters (DACs), with a settling time of only 1 micro-second.
"The programmability of the TLV1562 is an exciting feature for many designers," said H. Tony Chang, senior system engineer in TI's Advanced Analog Products Group. "For example, in a monitoring application, the ADC can be programmed to scan a wide area at low resolution and high speeds. Then, if the system notices something amiss, the TLV1562 can be programmed to automatically shift into a higher resolution, slower speed mode to take a closer look. This programming capability opens the door to new applications and emerging markets."
