ADC12L030_06 datasheet(1/35 Pages) NSC | 3.3V Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold

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ADC12L030/ADC12L032/ADC12L034/ADC12L038

3.3V Self-Calibrating 12-Bit Plus Sign Serial I/O A/D

Converters with MUX and Sample/Hold

General Description

NOTE: These products are now obsolete.

The ADC12L030 family is 12-bit plus sign successive ap-

proximation A/D converters with serial I/O and configurable

input multiplexers. These devices are fully tested with a

single 3.3V power supply. The ADC12L032, ADC12L034 and

ADC12L038 have 2, 4 and 8 channel multiplexers, respec-

tively. Differential multiplexer outputs and A/D inputs are

available at the MUXOUT1, MUXOUT2, A/DIN1 and A/DIN2

pins. The ADC12L030 has a two channel multiplexer with the

multiplexer outputs and A/D inputs internally connected. On

request, these A/Ds go through a self calibration process

that adjusts linearity, zero and full-scale errors to less than

±1⁄2 LSB each.

The analog inputs can be configured to operate in various

combinations of single-ended, differential, or pseudo-

differential modes. A fully differential unipolar analog input

range (0V to +3.3V) can be accommodated with a single

+3.3V supply. In the differential modes, valid outputs are

obtained even when the negative inputs are greater than the

positive because of the 12-bit plus sign two’s compliment

output data format.

The serial I/O is configured to comply with NSC’s

MICROWIRE™ and Motorola’s SPI standards. For voltage

references, see the LM4040, LM4050 or LM4041 data

sheets.

The ADC12L032 and the ADC12L034 are not recommended

for new designs and are presented for reference only.

Features

0V to 3.3V analog input range with single 3.3V supply

Serial I/O ( MICROWIRE and SPI Compatible)

2 or 8 channel differential or single-ended multiplexer

Power down mode

Programmable acquisition time

Variable digital output word length and format

No zero or full scale adjustment required

Key Specifications

Resolution

12-bit plus sign

12-bit plus sign conversion time

8.8 µs (min)

12-bit plus sign sampling rate

73 kHz (max)

Integral linearity error

±1 LSB (max)

Single supply

3.3V ±10%

Power consumption, active

15 mW (max)

Power consumption, pwr down

40 µW (typ)

Applications

Portable Medical instruments

Portable computing

Portable Test equipment

ADC12L038 Simplified Block Diagram

01183001

COPS™ microcontrollers, HPC™ and MICROWIRE™ are trademarks of National Semiconductor Corporation.

Microsoft™ is a trademark of Microsoft Corporation.

OBSOLETE

September 2006

DS011830

Part Number	Components Description	Html View	Manufacturer
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