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LM12L458 Datasheet(PDF) 1 Page - Texas Instruments |
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LM12L458 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 38 page  LM12L458 www.ti.com SNAS085B – JULY 1999 – REVISED MARCH 2013 LM12L458 12-Bit + Sign Data Acquisition System with Self-Calibration Check for Samples: LM12L458 1 FEATURES DESCRIPTION The LM12L458 is a highly integrated 3.3V Data 2 • Three Operating Modes: 12-Bit + Sign, 8-Bit + Acquisition System. It combines a fully-differential Sign, and “Watchdog” self-calibrating (correcting linearity and zero errors) • Single-Ended or Differential Inputs 13-bit (12-bit + sign) analog-to-digital converter (ADC) • Built-In Sample-and-Hold and sample-and-hold (S/H) with extensive analog functions and digital functionality. Up to 32 • Instruction RAM and Event Sequencer consecutive conversions, using two's complement • 8-Channel Multiplexer format, can be stored in an internal 32-word (16-bit • 32-Word Conversion FIFO wide) FIFO data buffer. An internal 8-word RAM can store the conversion sequence for up to eight • Programmable Acquisition Times and acquisitions through the LM12L458's eight-input Conversion Rates multiplexer. The LM12L458 can also operate with 8- • Self-Calibration and Diagnostic Mode bit + sign resolution and in a supervisory “watchdog” • 8- or 16-Bit Wide Data Bus Microprocessor or mode that compares an input signal against two DSP Interface programmable limits. Programmable acquisition times and conversion rates are possible through the use of • CMOS Compatible I/O internal clock-driven timers. APPLICATIONS All registers, RAM, and FIFO are directly addressable through the high speed microprocessor interface to • Data Logging either an 8-bit or 16-bit data bus. The LM12L458 • Process Control includes a direct memory access (DMA) interface for high-speed conversion data transfer. • Energy Management • Medical Instrumentation Additional applications information can be found in applications notes AN-906 (JAJA265), AN-947 KEY SPECIFICATIONS (SNAA012), and AN-949 (SNAA013). • (fCLK = 6 MHz) • Resolution: 12-Bit + Sign or 8-Bit + Sign • Single Supply: +3 to +5.5 V • 13-bit Conversion Time: 7.3 μs • 9-bit Conversion Time: 3.5 μs • 13-bit Through-Put Rate: 106 k Samples/s (Min) • Comparison Time (“Watchdog” Mode): 1.8 μs (Max) • ILE: ±1 LSB (Max) • Power Consumption: 15 mW (max) • Stand-By Mode: 5 μW (typ) 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 1999–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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