Rainbow-electronics MAX1092 Manual de usuario descargar pdf

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

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

General Description

The MAX1090/MAX1092 low-power, 10-bit analog-to-

digital converters (ADCs) feature a successive-approxi-

mation ADC, automatic power-down, fast wake-up

(2µs), on-chip clock, +2.5V internal reference, and

high-speed, byte-wide parallel interface. The devices

operate with a single +5V analog supply and feature a

LOGIC

pin that allows them to interface directly with a

+2.7V to +5.5V digital supply.

Power consumption is only 10mW (V

= V

LOGIC

) at a

400ksps max sampling rate. Two software-selectable

power-down modes enable the MAX1090/MAX1092 to

be shut down between conversions; accessing the par-

allel interface returns them to normal operation.

Powering down between conversions can cut supply

current to under 10µA at reduced sampling rates.

Both devices offer software-configurable analog inputs

for unipolar/bipolar and single-ended/pseudo-differen-

tial operation. In single-ended mode, the MAX1090 has

eight input channels and the MAX1092 has four input

channels (four and two input channels, respectively,

when in pseudo-differential mode).

Excellent dynamic performance and low power com-

bined with ease of use and small package size make

these converters ideal for battery-powered and data-

acquisition applications or for other circuits with

demanding power consumption and space require-

ments.

The MAX1090 is available in a 28-pin QSOP package,

while the MAX1092 comes in a 24-pin QSOP. For pin-

compatible +3V, 10-bit versions, refer to the MAX1091/

MAX1093 data sheet.

Applications

Industrial Control Systems Data Logging

Energy Management Patient Monitoring

Data-Acquisition Systems Touchscreens

Features

♦ 10-Bit Resolution, ±0.5LSB Linearity

♦ +5V Single-Supply Operation

♦ User-Adjustable Logic Level (+2.7V to +5.5V)

♦ Internal +2.5V Reference

♦ Software-Configurable Analog Input Multiplexer

8-Channel Single-Ended/

4-Channel Pseudo-Differential (MAX1090)

4-Channel Single-Ended/

2-Channel Pseudo-Differential (MAX1092)

♦ Software-Configurable Unipolar/Bipolar Analog

Inputs

♦ Low Current: 2.2mA (400ksps)

1.0mA (100ksps)

400µA (10ksps)

2µA (shutdown)

♦ Internal 6MHz Full-Power Bandwidth Track/Hold

♦ Byte-Wide Parallel (8+2) Interface

♦ Small Footprint: 28-Pin QSOP (MAX1090)

24-Pin QSOP (MAX1092)

MAX1090/MAX1092

400ksps, +5V, 8-/4-Channel, 10-Bit ADCs

with +2.5V Reference and Parallel Interface

________________________________________________________________ Maxim Integrated Products 1

19-1640; Rev 0; 1/00

PART

MAX1090ACEI

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

28 QSOP

Ordering Information

Pin Configurations

±0.5

INL

(LSB)

MAX1090BCEI 0°C to +70°C ±128 QSOP

MAX1090BEEI

MAX1090AEEI

-40°C to +85°C ±1

-40°C to +85°C ±0.528 QSOP

28 QSOP

Ordering Information continued at end of data sheet.

Typical Operating Circuits appear at end of data sheet.

LOGIC

REF

REFADJ

GND

COM

CH0

CH1

CH2

CH3

CLKWR

INT

D0/D8

D1/D9

HBEN

QSOP

MAX1092

TOP VIEW

Pin Configurations continued at end of data sheet.

EVALUATION KIT

AVAILABLE

1 2 3 4 5 6 ... 19 20

MAX1090/MAX1092 1

Indice de contenidos

Pagina 1 - MAX1090/MAX1092

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.For small orders, phone 1-800-835-8769.General DescriptionT

Pagina 2

Analog Input ProtectionInternal protection diodes, which clamp the analoginput to VDDand GND, allow each input channel toswing within (GND - 300mV) to

Pagina 3

MAX1090/MAX1092400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface____________________________________________________

Pagina 4

MAX1090/MAX1092400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface12 _________________________________________________

Pagina 5

can be used. At power-up, the MAX1090/MAX1092enter the default external clock mode.Internal Clock ModeSelect internal clock mode to release the µP fro

Pagina 6

MAX1090/MAX1092cies lower than 100kHz is not recommended because itwill cause a voltage droop across the hold capacitor inthe T/H stage that will resu

Pagina 7

___________Applications InformationPower-On ResetWhen power is first applied, internal power-on reset cir-cuitry activates the MAX1090/MAX1092 in exte

Pagina 8

MAX1090/MAX1092only 50µs are required after power-up. Enter standbymode by performing a dummy conversion with the con-trol byte specifying standby mod

Pagina 9

High-frequency noise in the power supply (VDD) couldinfluence the proper operation of the ADC’s fast com-parator. Bypass VDDto the star ground with a

Pagina 10

MAX1090/MAX1092Signal-to-Noise RatioFor a waveform perfectly reconstructed from digitalsamples, signal-to-noise ratio (SNR) is the ratio of full-scale

Pagina 11

MAX1090/MAX1092400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface____________________________________________________

Pagina 12

MAX1090/MAX1092400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface2 __________________________________________________

Pagina 13

MAX1090/MAX1092400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel InterfaceMaxim cannot assume responsibility for use of any ci

Pagina 14

VMAX1090/MAX1092400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface___________________________________________________

Pagina 15

Operating mode,MAX1090/MAX1092400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface4 ___________________________________

Pagina 16

MAX1090/MAX1092400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface____________________________________________________

Pagina 17

MAX1090/MAX1092400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface6 __________________________________________________

Pagina 18

MAX1090/MAX1092400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface____________________________________________________

Pagina 19

MAX1090/MAX1092400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface8 __________________________________________________

Pagina 20

MAX1090/MAX1092400ksps, +5V, 8-/4-Channel, 10-Bit ADCs with +2.5V Reference and Parallel Interface____________________________________________________

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