Features: `Three operating modes: 12-bit + sign, 8-bit + sign, and watchdog `Single-ended or differential inputs`Built-in Sample-and-Hold`Instruction RAM and event sequencer`8-channel multiplexer`32-word conversion FIFO`Programmable acquisition times and conversion rates`Self-calibration and diag...
LM12L458: Features: `Three operating modes: 12-bit + sign, 8-bit + sign, and watchdog `Single-ended or differential inputs`Built-in Sample-and-Hold`Instruction RAM and event sequencer`8-channel multiplexer`3...
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Resolution | 12 bits |
Input Channels | 8 |
Interface Type | Parallel |
Differential Input | Yes |
INL (LSB) | +/-1.0 |
Max KSample Rate | 114 ksps |
Min Supply Voltage | 3 Volt |
Max Supply Voltage | 3.6 Volt |
Reference Source | Internal |
Temperature Min | -40 deg C |
Temperature Max | 85 deg C |
Power Down | Yes |
Input Sample/Hold | Yes |
Special Features | Undefined |
Data Converter Type | ADC |
Max Sample Rate | 0.114 MSPS |
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The LM12L458 is a highly integrated 3.3V Data Acquisition System. It combines a fully-differential self-calibrating (correcting linearity and zero errors) 13-bit (12-bit + sign) analog-to-digital converter (ADC) and sample-and-hold (S/H) with extensive analog functions and digital functionality. Up to 32 consecutive conversions, using two's complement format, can be stored in an internal 32-word (16-bit wide) FIFO data buffer. An internal 8-word RAM can store the conversion sequence for up to eight acquisitions through the LM12L458's eight-input multiplexer. The LM12L458 can also operate with 8-bit + sign resolution and in a supervisory "watchdog" mode that compares an input signal against two programmable limits. Programmable acquisition times and conversion rates are possible through the use of internal clock-driven timers.
All registers, RAM, and FIFO are directly addressable through the high speed microprocessor interface to either an 8-bit or 16-bit databus. The LM12L458 includes a direct memory access (DMA) interface for high-speed conversion data transfer.