Rainbow-electronics MAX1383 Manual do Utilizador descarregar pdf

General Description

The MAX1377/MAX1379/MAX1383 feature two simulta-

neous-sampling, low-power, 12-bit ADCs with serial

interface and internal voltage reference. Fast sampling

rate, low power dissipation, and excellent dynamic per-

formance make the MAX1377/MAX1379/MAX1383

ideal for industrial process control, motor control, and

RF applications.

Conversion results are available through a SPI™-/

QSPI™-/MICROWIRE™-/DSP-compatible interface with

independent serial digital outputs for each channel. The

serial outputs allow twice as much data to be transferred

at the given clock rate. The conversion results for both

ADCs can also be output on a single digital output for

microcontrollers (µCs) and DSPs with only a single serial

input available.

The MAX1377 operates from a 2.7V to 3.6V analog sup-

ply and the MAX1379/MAX1383 operate from a 4.75V

to 5.25V analog supply. A separate 1.8V to AVDD digi-

tal supply allows interfacing to low voltage logic without

the use of level translators.

Two power-down modes, partial and full, allow the

MAX1377/MAX1379 and MAX1383 (full power-down only)

to save power between conversions. Partial power-down

mode reduces the supply current to 2mA while leaving

the reference enabled for quick power-up. Full power-

down mode reduces the supply current to 1µA.

The MAX1377/MAX1379 inputs accept voltages

between zero and the reference voltage or ±V

REF

/2.

The MAX1383 offers an input voltage range of ±10V,

which is ideal for industrial and motor-control applica-

tions. The input to each of the ADCs supports either a

true-differential input or two single-ended inputs.

The MAX1377/MAX1379/MAX1383 are available in a

20-pin TQFN package, and are specified for the automo-

tive (-40°C to +125°C) temperature range.

Applications

Motor Control

Communications

Data Acquisition

Bill Validation

Portable Instruments

Features

o Dual, Simultaneous-Sampling, 12-Bit Successive

Approximation Register (SAR) ADCs

o 2 x 2 Mux Inputs or Two Differential Inputs

o 1.25Msps Sampling Rate per ADC

o Internal or External Reference

o Excellent Dynamic Performance

70dB SINAD (MAX1377)

71dB SINAD (MAX1379/MAX1383)

84dBc/SFDR

1MHz Full-Linear Bandwidth

o 2.7V to 3.6V Low-Power Operation (MAX1377)

50mW (Normal Operation)

6mW (Partial Power-Down)

3µW (Full Power-Down)

o 4.75V to 5.25V Low-Power Operation (MAX1379)

90mW (Normal Operation)

10mW (Partial Power-Down)

5µW (Full Power-Down)

o 20MHz, SPI-Compatible, 3-Wire Serial Interface

User-Selectable Single (0.625Msps max) or Dual

Outputs (1.25Msps max)

o Input Range: ±10V (MAX1383), 0–V

REF

±V

REF

/2 (MAX1377/MAX1379)

o Small 20-Pin TQFN Package

MAX1377/MAX1379/MAX1383

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling

ADCs with Serial Interface

________________________________________________________________

Maxim Integrated Products

19-4126; Rev 0; 7/08

For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

REF

AGND

AVDD

REFSEL

CNVST

DOUT1

DOUT2

AGND

15 14 12 11

AIN1B

AIN1A

DGND

U/B

AIN2B

AIN2A

MAX1377

MAX1379

MAX1383

RGND

SCLK

SEL

S/D

TQFN

TOP VIEW

(EXPOSED PAD)*

*CONNECT PAD TO AGND

Pin Configuration

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX1377ATP+ -40°C to +125°C 20 TQFN-EP*

MAX1379ATP+ -40°C to +125°C 20 TQFN-EP*

MAX1383ATP+** -40°C to +125°C 20 TQFN-EP*

Denotes a lead-free/RoHS-compliant package.

EP = Exposed pad.

Future product—contact factory for availability.

SPI/QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

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Resumo do Conteúdo

Página 1 - ADCs with Serial Interface

General DescriptionThe MAX1377/MAX1379/MAX1383 feature two simulta-neous-sampling, low-power, 12-bit ADCs with serialinterface and internal voltage re

Página 2

MAX1377/MAX1379/MAX1383Dual, 12-Bit, 1.25Msps Simultaneous-SamplingADCs with Serial Interface10 ______________________________________________________

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