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Back to December 1998 Integration

Low-power programmable ADC

The TLV1562, a high-speed, low power ADC with programmable resolution, redefines system design for DSP applications. The device provides flexibility for portable digital radios, paging systems, process and motor controls, remote sensing, automotive systems, servo controls and communications systems such as wireless local loops.

The resolution and sampling speed of the TLV1562 can be programmed to change dynamically during operation. A unique recyclic dual sample/hold (S/H) architecture enables the device to digitize a continuous signal or provide low interrupt latency depending on system needs. The dual S/H, with shared amplifier and ADC, provides two matched channels and can be configured to allow automated multichannel data acquisition that requires minimal host intervention.

The device provides either binary code or two's complement code. This offloads the code conversion function from the DSP. The device is well suited for under-sampling applications with a wide input bandwidth of 75 MHz at -1 dB and >120 MHz at -3 dB. Programmable conversion modes, both interrupt-driven and continuous, support optimization for MIPS-sensitive applications.

Power consumption as low as 6 mA at 2.7 V or 10 mA at 5.5 V extends battery charges, and a DSP- and microprocessor-compatible interface simplifies design. The TLV1562 is available in 28-pin TSSOP and SOIC packages with suggested resale pricing of $4.51 (U.S. dollars) per unit in quantities of 1,000.

TLV1562 features Reconfigurable: 2 MSPS @ 10 bit, 3 MSPS @ 8 bit, 7 MSPS @ 4 bit Wide input bandwidth for undersampling: 12 MHZ @ -3dB Low operating supply current: 10 mA @ 5.5 V, 6 mA @ 2.7 V Extensive power-down features including S/W PWDN and auto PWDN Simultaneous sample and hold Programmable conversion modes Programmable single-ended/differential inputs

For complete information, order: Data Sheet (SLAS162). See Related Product Information.