Rainbow-electronics MAX1401 Bedienungsanleitung PDF herunterladen

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

MAX1401

+3V, 18-Bit, Low-Power, Multichannel,

Oversampling (Sigma-Delta) ADC

________________________________________________________________

Maxim Integrated Products

19-1480; Rev 0; 5/99

EVALUATION KIT

AVAILABLE

General Description

The MAX1401 18-bit, low-power, multichannel, serial-

output ADC uses a sigma-delta modulator with a digital

decimation filter to achieve true 16-bit accuracy. The

user-selectable decimation factor of the digital filter

allows the conversion resolution to be reduced in

exchange for a higher output data rate. The device

achieves true 16-bit performance at an output data rate of

up to 480sps. In addition, the modulator sampling

frequency may be optimized for either lowest power

dissipation or highest throughput rate. The MAX1401

operates from +3V.

This device offers three fully differential input channels

that can be independently programmed with a gain

between +1V/V and +128V/V. Furthermore, it can com-

pensate an input-referred DC offset (such as system off-

set) up to 117% of the selected full-scale range. These

three differential channels may also be configured to

operate as five pseudo-differential input channels. Two

additional, fully differential system-calibration channels

are provided for gain and offset error correction. External

access is provided to the multiplexer (mux) output to

facilitate additional signal processing.

The MAX1401 can be configured to sequentially scan all

signal inputs and provide the results through the serial

interface with minimum communications overhead. When

used with a 2.4576MHz or 1.024MHz master clock, the

digital decimation filter can be programmed to produce

zeros in its frequency response at the line frequency

and associated harmonics, ensuring excellent line rejec-

tion without the need for further postfiltering.

The MAX1401 is available in a 28-pin SSOP package.

Applications

Portable Industrial Instruments

Portable Weigh Scales

Loop-Powered Systems

Pressure Transducers

Features

♦ 18-Bit Resolution, Sigma-Delta ADC

♦ 16-Bit Accuracy with No Missing Codes to 480sps

♦ Access to the Mux Output/ADC Input

♦ Low Quiescent Current

250µA (operating mode)

2µA (power-down mode)

♦ 3 Fully Differential or 5 Pseudo-Differential Signal

Input Channels

♦ 2 Additional Fully Differential Calibration

Channels/Auxiliary Input Channels

♦ Programmable Gain and Offset

♦ Fully Differential Reference Inputs

♦ Converts Continuously or On Command

♦ Automatic Channel Scanning and Continuous

Data Output Mode

♦ Operates with Analog and Digital Supplies

from +2.7V to +3.6V

♦ SPI™/QSPI™-Compatible 3-Wire Serial Interface

♦ 28-Pin SSOP Package

SCLK

DIN

DOUT

INT

DGND

AIN5

CALOFF+

CALOFF-

REFIN+

REFIN-

CALGAIN+

CALGAIN-

AIN6

AIN4

AIN3

AIN2

AIN1

V+

AGND

ADCIN-

ADCIN+

MUXOUT-

MUXOUT+

RESET

CLKOUT

CLKIN

SSOP

TOP VIEW

MAX1401

SPI and QSPI are trademarks of Motorola, Inc.

Pin Configuration

Ordering Information

28 SSOP

PIN-PACKAGETEMP. RANGE

0°C to +70°C

-40°C to +85°CMAX1401EAI

MAX1401CAI

PART

1 2 3 4 5 6 ... 35 36

Inhaltsverzeichnis

Seite 1 - Ordering Information

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.For small orders, phone 1-800-835-8769.MAX1401+3V, 18-B

Seite 2 - ELECTRICAL CHARACTERISTICS

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC10 ________________________________________________________________________

Seite 3 - DAC (Note 9)

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC___________________________________________________________________________

Seite 4

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC12 ________________________________________________________________________

Seite 5

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC___________________________________________________________________________

Seite 6 - Network

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC14 ________________________________________________________________________

Seite 7 - TIMING CHARACTERISTICS

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC___________________________________________________________________________

Seite 8

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC16 ________________________________________________________________________

Seite 9

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC___________________________________________________________________________

Seite 10 - MAX1401-12

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC18 ________________________________________________________________________

Seite 11

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC___________________________________________________________________________

Seite 12 - Pin Description (continued)

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC2 _________________________________________________________________________

Seite 13 - Circuit Description

Do Not UseDo Not UseMAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC20 ____________________________________________________

Seite 14 - Serial Digital Interface

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC___________________________________________________________________________

Seite 15 - On-Chip Registers

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC22 ________________________________________________________________________

Seite 16

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC___________________________________________________________________________

Seite 17

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC24 ________________________________________________________________________

Seite 18 - (SCAN = 0)

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC___________________________________________________________________________

Seite 19 - Table 6. PGA Gain Codes

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC26 ________________________________________________________________________

Seite 20 - X = Don’t care

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC___________________________________________________________________________

Seite 21 - Data Register (Read-Only)

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC28 ________________________________________________________________________

Seite 22 - Burn-Out Currents

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC___________________________________________________________________________

Seite 23 - Channel Selection Network

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC___________________________________________________________________________

Seite 24 - Input Buffers

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC30 ________________________________________________________________________

Seite 25 - Output Noise

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC___________________________________________________________________________

Seite 26

Bit-Banging Interface (80C51, PIC16C54)Any microcontroller can use general-purpose I/O pinsto interface to the MAX1401. If a bidirectional or open-dra

Seite 27 - = 2.4576MHz

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC___________________________________________________________________________

Seite 28 - Clock Oscillator

Loop-Powered, 4–20mA TransmittersLow power, single-supply operation, and easy interfac-ing with optocouplers make the MAX1401 ideal forloop-powered 4–

Seite 29 - Filter Characteristics

Grounding and LayoutFor best performance, use printed circuit boards withseparate analog and digital ground planes. Wire-wrapboards are not recommende

Seite 30 - Applications Information

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADCMaxim cannot assume responsibility for use of any circuitry other than circ

Seite 31

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC4 _________________________________________________________________________

Seite 32

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC___________________________________________________________________________

Seite 33 - Temperature Measurement

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC6 _________________________________________________________________________

Seite 34 - Power Supplies

nsMAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC_________________________________________________________________________

Seite 35 - Chip Information

MAX1401+3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC8 _________________________________________________________________________

Seite 36 - SSOP.EPS

-150-5-1051015-1.0 -0.5 0 0.5 1.0MAX1401-02DIFFERENTIAL INPUT VOLTAGE (V)DNL (ppm)480spsGAIN = +1V/V262, 144 ptsDIFFERENTIAL NONLINEARITYMAX1401+3V, 1

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Rainbow-electronics MAX1401 Bedienungsanleitung

Stöbern Sie online oder laden Sie Bedienungsanleitung nach Sensoren Rainbow-electronics MAX1401 herunter. Rainbow Electronics MAX1401 User Manual Benutzerhandbuch

Inhaltsverzeichnis

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