TLV5590 2-BIT ANALOG-TO-DIGITAL CONVERTER FOR FLEX^TM PAGER CHIPSET

SLAS134B - NOVEMBER 1995 - REVISED NOVEMBER 1996

features

• Supports FLEX^TM Protocol Pagers With The TLV5591 FLEX Decoder
• 3-Pole Butterworth Low-Pass Selectable Dual-Bandwidth Audio Filter
- BW 1 = 1 kHz ±5% (- 3 dB) - BW 2 = 2 kHz ±5% (- 3 dB)
• Both Peak and Valley Detectors Available
• 2-Bit Analog-to-Digital Converter
• Operating Temperature Range . . . -25°C to 85°C
• Four Modes of Operation:
- Fast Acquisition - Slow Acquisition - Hold Acquisition - Standby
• 2.7-V to 3.3-V Single Power Supply Operation

applications

• FLEX Protocol Numeric and Alphanumeric Pagers
• One-Way or Two-Way

  FLEX is a trademark of Motorola, Incorporated.

description

The TLV5590 analog-to-digital converter is a system level solution to interface a 4-level baseband audio signal to a digital decoder. The TLV5590 is a direct interface to the TLV5591BVF FLEX decoder. Designed primarily for pager applications, the TLV5590 incorporates signal conditioning, both peak and valley detection along with analog-to-digital conversion. A selectable third-order Butterworth filter with cutoff frequencies of 1 kHz and 2 kHz is included. The peak and valley detectors are implemented with a unique design that does not require external capacitors. Two 8-bit digital-to-analog converters (DACs) are used in a feedback loop to automatically adjust to the peak and valley levels. The DAC outputs are used to set V_ref+ and V_ref- for the 2-bit analog-to-digital converter (ADC). Modes of operation include fast track, slow track, hold, and standby. The standby mode maximizes battery life. The TLV5590 operates on a single supply down to 2.7 V.

TLV5591BVF Data Manual Literature Number - SLWS048.

View more information about generic part numbers:TLV5590

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