Rainbow-electronics MAX1093 Manual de usuario descargar pdf

General Description

The MAX1091/MAX1093 low-power, 10-bit analog-to-

digital converters (ADCs) feature a successive-approxi-

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

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

high-speed, byte-wide parallel interface. They operate

with a single +3V analog supply and feature a V

LOGIC

pin that allows them to interface directly with a +1.8V to

+3.6V digital supply.

Power consumption is only 5.7mW (V

= V

LOGIC

) at

the maximum sampling rate of 250ksps. Two software-

selectable power-down modes enable the MAX1091/

MAX1093 to be shut down between conversions;

accessing the parallel 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 MAX1091 has

eight input channels and the MAX1093 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 demand-

ing power consumption and space requirements.

The MAX1091 is available in a 28-pin QSOP package,

while the MAX1093 is available in a 24-pin QSOP. For

pin-compatible +5V, 10-bit versions, refer to the

MAX1090/MAX1092 data sheet.

Applications

Industrial Control Systems Data Logging

Energy Management Patient Monitoring

Data-Acquisition Systems Touch Screens

Features

♦ 10-Bit Resolution, ±0.5LSB Linearity

♦ +3V Single-Supply Operation

♦ User-Adjustable Logic Level (+1.8V to +3.6V)

♦ Internal +2.5V Reference

♦ Software-Configurable, Analog Input Multiplexer

8-Channel Single-Ended/

4-Channel Pseudo-Differential (MAX1091)

4-Channel Single-Ended/

2-Channel Pseudo-Differential (MAX1093)

♦ Software-Configurable, Unipolar/Bipolar Inputs

♦ Low Power: 1.9mA (250ksps)

1.0mA (100ksps)

400µA (10ksps)

2µA (Shutdown)

♦ Internal 3MHz Full-Power Bandwidth Track/Hold

♦ Byte-Wide Parallel (8+2) Interface

♦ Small Footprint: 28-Pin QSOP (MAX1091)

24-Pin QSOP (MAX1093)

MAX1091/MAX1093

250ksps, +3V, 8-/4-Channel, 10-Bit ADCs

with +2.5V Reference and Parallel Interface

________________________________________________________________ Maxim Integrated Products 1

19-1638; Rev 0; 1/00

PART

MAX1091ACEI

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

28 QSOP

Ordering Information

Pin Configurations

±0.5

INL

(LSB)

MAX1091BCEI

0°C to +70°C

±128 QSOP

Ordering Information continued at end of data sheet.

Typical Operating Circuits appear at end of data sheet.

TOP VIEW

LOGIC

REF

REFADJ

GND

COM

CH0

CH1

CH2

CH3

CLKWR

INT

D0/D8

D1/D9

HBEN

QSOP

MAX1093

Pin Configurations continued at end of data sheet.

EVALUATION KIT

AVAILABLE

MAX1091BEEI

MAX1091AEEI

-40°C to +85°C

±1

-40°C to +85°C

±0.528 QSOP

28 QSOP

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.

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MAX1091/MAX1093 1

Indice de contenidos

Pagina 1 - MAX1091/MAX1093

General DescriptionThe MAX1091/MAX1093 low-power, 10-bit analog-to-digital converters (ADCs) feature a successive-approxi-mation ADC, automatic power-

Pagina 2

MAX1091/MAX1093Analog Input ProtectionInternal protection diodes, which clamp the analoginput to VDDand GND, allow each input channel toswing within (

Pagina 3

conversion. The sampling interval occurs at the end ofthe acquisition interval. The ACQMOD (acquisitionmode) bit in the input control byte (Table 1) o

Pagina 4

MAX1091/MAX1093250ksps, +3V, 8-/4-Channel, 10-Bit ADCswith +2.5V Reference and Parallel Interface12 __________________________________________________

Pagina 5