Rainbow-electronics MAX1168 Instrukcja Użytkownika Pobierz pdf

General Description

The MAX1167/MAX1168 low-power, multichannel, 16-

bit analog-to-digital converters (ADCs) feature a suc-

cessive-approximation ADC, integrated +4.096V

reference, a reference buffer, an internal oscillator,

automatic power-down, and a high-speed SPI™/

QSPI™/MICROWIRE™-compatible interface. The

MAX1167/MAX1168 operate with a single +5V analog

supply and feature a separate digital supply, allowing

direct interfacing with +2.7V to +5.5V digital logic.

The MAX1167/MAX1168 consume only 2.9mA (AV

= +5V) at 200ksps when using an external reference.

AutoShutdown™ reduces the supply current to 145µA at

10ksps and to less than 10µA at reduced sampling rates.

The MAX1167 includes a 4-channel input multiplexer, and

the MAX1168 accepts up to eight analog inputs.

In addition, digital signal processor (DSP)-initiated con-

versions are simplified with the DSP frame-sync input and

output featured in the MAX1168. The MAX1168 includes

a data-bit transfer input to select between 8-bit-wide or

16-bit-wide data-transfer modes. Both devices feature a

scan mode that converts each channel sequentially or

one channel continuously.

Excellent dynamic performance and low power, com-

bined with ease of use and an integrated reference, make

the MAX1167/MAX1168 ideal for control and data-acqui-

sition operations or for other applications with demanding

power consumption and space requirements. The

MAX1167 is available in a 16-pin QSOP package and the

MAX1168 is available in a 24-pin QSOP package. Both

devices are guaranteed over the commercial (0°C to

+70°C) and extended (-40°C to +85°C) temperature

ranges. Use the MAX1168 evaluation kit to evaluate the

MAX1168.

Applications

Motor Control

Industrial Process Control

Industrial I/O Modules

Data-Acquisition Systems

Thermocouple Measurements

Accelerometer Measurements

Features

♦ 16-Bit Resolution, ±1 LSB DNL (max)

♦ +5V Single-Supply Operation

♦ Adjustable Logic Level (+2.7V to +5.25V)

♦ Input Voltage Range: 0 to V

REF

♦ Internal (+4.096V) or External (+3.8V to AV

)

Reference

♦ Internal Track/Hold, 4MHz Input Bandwidth

♦ Internal or External Clock

♦ SPI/QSPI/MICROWIRE-Compatible Serial

Interface, MAX1168 Performs DSP-Initiated

Conversions

♦ 8-Bit-Wide or 16-Bit-Wide Data-Transfer Mode

(MAX1168 Only)

♦ 4-Channel (MAX1167) or 8-Channel (MAX1168)

Input Mux

Scan Mode Sequentially Converts Multiple

Channels or One Channel Continuously

♦ Low Power

2.9mA at 200ksps

1.45mA at 100ksps

145µA at 10ksps

0.6µA in Full Power-Down Mode

♦ Small Package Size

16-Pin QSOP (MAX1167)

24-Pin QSOP (MAX1168)

MAX1167/MAX1168

Multichannel, 16-Bit, 200ksps Analog-to-Digital

Converters

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-2956; Rev 0; 8/03

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

PART TEMP RANGE

PIN-

PACKAGE

INL

(LSB)

MAX1167ACEE 0°C to +70°C 16 QSOP ±1.2

MAX1167BCEE 0°C to +70°C 16 QSOP ±2

MAX1167CCEE 0°C to +70°C 16 QSOP ±3

MAX1167AEEE* -40°C to +85°C 16 QSOP ±1.2

MAX1167BEEE* -40°C to +85°C 16 QSOP ±2

MAX1167CEEE* -40°C to +85°C 16 QSOP ±3

Ordering Information continued at end of data sheet.

SPI/QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

AutoShutdown is a trademark of Maxim Integrated Products, Inc.

Pin Configurations appear at end of data sheet.

*Future product—contact factory for availability.

1 2 3 4 5 6 ... 29 30

MAX1167/MAX1168 1
Converters 1

Podsumowanie treści

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General DescriptionThe MAX1167/MAX1168 low-power, multichannel, 16-bit analog-to-digital converters (ADCs) feature a suc-cessive-approximation ADC, in

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters10 ___________________________________________________________________________

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Detailed DescriptionThe MAX1167/MAX1168 low-power, multichannel, 16-bitADCs feature a successive-approximation ADC, auto-matic power-down, integrated

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MAX1167/MAX1168Track/Hold (T/H)In track mode, the analog signal is acquired on theinternal hold capacitor. In hold mode, the T/H switchesopen and the

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The MAX1168 features a 16-bit-wide data-transfermode that includes a longer acquisition time (11.5clock cycles). Longer acquisition times are useful i

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MAX1167/MAX1168Digital InterfaceThe MAX1167/MAX1168 feature an SPI/QSPI/MICROWIRE-compatible, 3-wire serial interface. TheMAX1167 digital interface co

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters______________________________________________________________________________

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MAX1167/MAX1168Power-Down ModesTable 5 shows the MAX1167/MAX1168 power-downmodes. Three internal reference modes and one exter-nal reference mode are

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than 125kHz can reduce accuracy due to leakage of thesampling capacitor. DOUT changes from high-Z to logiclow after CS is brought low. Input data latc

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MAX1167/MAX1168The MAX1168 external clock 16-bit-wide data-transfermode requires 32 SCLK cycles for completion (Figure 11).Force CS high after the co

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entire conversion result, 16 SCLK cycles are needed.Extra clock pulses, occurring after the conversion resulthas been clocked out and prior to the ris

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters2 ____________________________________________________________________________

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MAX1167/MAX1168Internal Clock 16-Bit-Wide Data-Transfer and ScanMode (MAX1168 Only)Force DSPR high and DSEL low for the SPI/QSPI/MICROWIRE interface m

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are shut down on the EOC high-to-low transition. Usethe EOC high-to-low transition as the signal to restartthe external clock (SCLK). To read the ent

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MAX1167/MAX1168setting bits 4 and 3 in the command/configuration/con-trol register (see Tables 3 and 4). In scan mode, conver-sion results are stored

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters______________________________________________________________________________

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters24 ___________________________________________________________________________

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters______________________________________________________________________________

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters26 ___________________________________________________________________________

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters______________________________________________________________________________

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Effective Number of BitsEffective number of bits (ENOB) indicates the globalaccuracy of an ADC at a specific input frequency andsampling rate. An idea

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters______________________________________________________________________________

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters______________________________________________________________________________

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConvertersMaxim cannot assume responsibility for use of any circuitry other than circuit

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters4 ____________________________________________________________________________

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters______________________________________________________________________________

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters6 ____________________________________________________________________________

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters______________________________________________________________________________

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MAX1167/MAX1168Multichannel, 16-Bit, 200ksps Analog-to-DigitalConverters8 ____________________________________________________________________________

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OFFSET ERROR vs. SUPPLY VOLTAGEMAX1167/68 toc17AVDD (V)OFFSET ERROR (µV)5.154.85 5.054.952001000-100-200-300-4004.75 5.25VREF = +4.096VGAIN ERROR vs.

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