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MAX1497EAI, MAX1497ECSA, MAX1498

Table of contents:
Info of MAX1497EAI
Info of MAX1497ECSA
Info of MAX1498

MAX1497EAI, MAX1497ECSA, MAX1498 Selling Leads, Datasheet

MFG:MAXIM Package Cooled:SSOP-28 D/C:New

MAX1497EAI, MAX1497ECSA, MAX1498 Picture

MAX1497EAI, MAX1497ECSA, MAX1498 Datasheet download

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Part Number: MAX1497EAI

MFG: MAXIM

Package Cooled: SSOP-28

D/C: New

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MAX1498 General Description

The MAX1447/MAX1496/MAX1498 low-power, 3.5- and 4.5-digit, analog-to-digital converters (ADCs) with integrated light-emitting diode (LED) drivers operate from a single 2.7V to 5.25V power supply. They include an internal reference, a high-accuracy on-chip oscillator, and a multiplexed LED display driver. An internal charge pump generates the negative supply needed to power the integrated input buffers for single-supply operation. The ADC is configurable for either a ±2V or ±200mV input range and it outputs its conversion results to an LED. The MAX1496 is a 3.5-digit (±1999 count) device and the MAX1447/MAX1498 are 4.5-digit (±19,999 count) devices.

The MAX1447/MAX1496/MAX1498 do not require external precision integrating capacitors, autozero capacitors, crystal oscillators, charge pumps, or other circuitry required with dual-slope ADCs (commonly used in panel meter circuits).

These devices also feature on-chip buffers for the differential signal and reference input, allowing direct interface with high-impedance signal sources. In addition, they use continuous internal offset-calibration and offer >100dB rejection of 50Hz and 60Hz line noise. Other features include data hold and peak detection and overrange/underrange detection. The MAX1447 features on-demand enhanced offset calibration for improved offset performance.

The MAX1447/MAX1498 are available in a 32-pin, 7mm x 7mm TQFP package and the MAX1496 is available in 28-pin SSOP and 28-pin PDIP packages. All devices in this family operate over the -40°C to +85°C extended temperature range.

MAX1498 Maximum Ratings

AVDD to GND (MAX1447/MAX1498)........................-0.3V to +6V
DVDD to GND (MAX1447/MAX1498)........................-0.3V to +6V
AIN+, AIN- to GND
    (MAX1447/MAX1498) .....................VNEG to (AVDD to +0.3V)
REF+, REF- to GND
    (MAX1447/MAX1498) .....................VNEG to (AVDD to +0.3V)
INTREF, RANGE, DPSET1, DPSET2, HOLD, PEAK,
    DPON to GND (MAX1447/MAX1498) ..-0.3V to (DVDD + 0.3V)
VNEG to GND (MAX1447/MAX1498).......-2.6V to (AVDD + 0.3V)
LED_EN to GND (MAX1447/MAX1498)... -0.3V to (DVDD + 0.3V)
ISET to GND (MAX1447/MAX1498) ........-0.3V to (AVDD + 0.3V)
VDD to GND (MAX1496).........................................-0.3V to +6V
AIN+, AIN- to GND (MAX1496)..............VNEG to (VDD to +0.3V)
REF+, REF- to GND (MAX1496) ........... VNEG to (VDD to +0.3V)
INTREF, RANGE, DPSET1, DPSET2, HOLD, PEAK,
    DPON to GND (MAX1496) ...................-0.3V to (VDD + 0.3V)
VNEG to GND (MAX1496)........................-2.6V to (VDD + 0.3V)
ISET to GND (MAX1496) .........................-0.3V to (VDD + 0.3V)
VLED to GLED........................................................-0.3V to +6V
GLED to GND......................................................-0.3V to +0.3V
SEG_ to GLED........................................-0.3V to (VLED + 0.3V)
DIG_ to GLED ........................................-0.3V to (VLED + 0.3V)
DIG_ Sink Current ..........................................................300mA
DIG_ Source Current.........................................................50mA
SEG_ Sink Current ........................................................... 50mA
SEG_ Source Current.........................................................50mA
Maximum Current Input into Any Other Pin ....................... .50mA
Continuous Power Dissipation (TA = +70)
    2-Pin TQFP (derate 20.7mW/ above +70).........1652.9mW
    28-Pin SSOP (derate 9.5mW/ above +70) ............762mW
    28-Pin PDIP (derate 14.3mW/ above +70).......1142.9mW
Operating Temperature Range ...........................-40°C to +85
Junction Temperature......................................................+150
Storage Temperature Range .............................-60 to +150
Lead Temperature (soldering, 10s) .................................+300

MAX1498 Features

` High Resolution
    MAX1447/MAX1498: 4.5 Digits (±19,999 Count)
    MAX1496: 3.5 Digits (±1999 Count)
` Sigma-Delta ADC Architecture
    No Integrating Capacitors Required
    No Autozeroing Capacitors Required
    >100dB of Simultaneous 50Hz and 60Hz
    Rejection
` Selectable Input Range of ±200mV or ±2V
` Selectable Voltage Reference: Internal 2.048V or External
` Internal High-Accuracy Oscillator Needs No External Components
` Automatic Offset Calibration
` On-Demand Enhanced Offset Calibration (MAX1447)
` Operate from a Single 2.7V to 5.25V Supply
` Low Power (Exclude LED-Driver Current)
    Maximum 744A Operating Current (MAX1496)
    Maximum 960A Operating Current
    (MAX1447/MAX1498)
    Maximum 325A Shutdown Current
`Multiplexed Common-Cathode LED Drivers
    Resistor-Programmable Segment Current
` Small 32-Pin, 7mm x 7mm TQFP Package (4.5 Digits), 28-Pin SSOP Package (3.5 Digits)
` Also Available in a PDIP Package (3.5 Digits)

MAX1498 Typical Application

·Digital Panel Meters
·Hand-Held Meters
·Digital Voltmeters
·Digital Multimeters

MAX1498 Connection Diagram

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