Datasheet > MAX1492CAI+

MAX1492CAI+

更新时间： 2024-02-07 11:35:26

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数据手册

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MAX1492CAI+ 数据手册

19-2959; Rev 4; 7/1±

3.5- and 4.5-Digit, Single-Chip ADCs

with LCD Drivers

2/MAX194

General Description

Features

The MAX1492/MAX1494 low-power, 3.5- and 4.5-digit,

analog-to-digital converters (ADCs) with integrated liquid

crystal display (LCD) drivers operate from a single 2.7V

to 5.25V power supply. They include an internal refer-

ence, a high-accuracy on-chip oscillator, and a triplexed

LCD driver. An internal charge pump generates the neg-

ative supply needed to power the integrated input buffer

for single-supply operation. The ADCs are configurable

for either a ±2V or ±2±±mV input range and outputs its

conversion results to an LCD and/or to a microcontroller

(µC). µC communication is facilitated through an

o High Resolution

MAX1494: 4.5 Digits ( 19,999 Count)

MAX1492: 3.5 Digits ( 1999 Count)

o Sigma-Delta ADC Architecture

No Integrating Capacitors Required

No Autozeroing Capacitors Required

>100dB of Simultaneous 50Hz and 60Hz

Rejection

o Operate from a Single 2.7V or 5.25V Supply

o Selectable Input Range of 200mV or 2V

SPI™-/QSPI™-/MICROWIRE -compatible serial inter-

face. The MAX1492 is a 3.5-digit (±1999 count) device,

and the MAX1494 is a 4.5-digit (±19,999 count) device.

o Selectable Voltage Reference: Internal 2.048V

or External

The MAX1492/MAX1494 do not require external-preci-

sion integrating capacitors, autozero capacitors, crystal

oscillators, charge pumps, or other circuitry required

with dual-slope ADCs (commonly used in panel meter

circuits).

o Internal High-Accuracy Oscillator Needs No

External Components

o Automatic Offset Calibration

o Low Power

These devices also feature on-chip buffers for the dif-

ferential signal and reference inputs, allowing direct

interface with high-impedance signal sources. In addi-

tion, they use continuous internal-offset calibration and

offer >1±±dB simultaneous rejection of 5±Hz and 6±Hz

line noise. Other features include data hold and peak

hold, overrange and underrange detection, and a low-

battery monitor.

Maximum 960µA Operating Current

Maximum 400µA Shutdown Current

o Small 32-Pin 7mm x 7mm LQFP Package

(4.5 Digits), 28-Pin SSOP Package (3.5 Digits)

o Triplexed LCD Driver

o SPI-/QSPI-/MICROWIRE-Compatible Serial

The MAX1494 comes in a 32-pin, 7mm x 7mm LQFP

package, and the MAX1492 comes in 28-pin SSOP and

28-pin PDIP packages. All devices in this family operate

over the ±°C to +7±°C commercial temperature range.

Interface

o Evaluation Kit Available (Order MAX1494EVKIT)

Ordering Information/

Selector Guide

Applications

Digital Panel Meters

Hand-Held Meters

Digital Voltmeters

Digital Multimeters

TEMP

RANGE

PIN-

PACKAGE

RESOLUTION

(DIGITS)

PART

MAX1492CAI+

±°C to +7±°C 28 SSOP

±°C to +7±°C 28 PDIP

3.5

4.5

MAX1492CNI+

MAX1494CCJ+ ±°C to +7±°C 32 LQFP

+Denotes a lead(Pb)-free/RoHS-compliant package.

Pin Configurations appear at end of data sheet.

SPI/QSPI are trademarks of Motorola, Inc.

MICROWIRE is a registered trademark of National

Semiconductor Corp.

________________________________________________________________ Maxim Integrated Products

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.

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与MAX1492CAI+相关器件

型号	品牌	获取价格	描述	数据表
MAX1492CAI+T	MAXIM	获取价格	ADC, Proprietary Method, 1 Func, 1 Channel, BICMOS, PDSO28, 5.30 MM, MO-150, SSOP-28
MAX1492CNI	MAXIM	获取价格	3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers
MAX1492CNI+	MAXIM	获取价格	ADC, Delta-Sigma, 1 Func, 1 Channel, BICMOS, PDIP28, 0.300 INCH, MO-058, PDIP-28
MAX1493	MAXIM	获取价格	3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers
MAX1493	ADI	获取价格	3位半和4位半、单片ADC，带有LCD驱动器
MAX14930	MAXIM	获取价格	Many Options Support Broad Applications
MAX14930AASE+	MAXIM	获取价格	4-Channel, 1kVRMS and 2.75kVRMS, Digital Isolators
MAX14930AAWE+	MAXIM	获取价格	4-Channel, 1kVRMS and 2.75kVRMS, Digital Isolators
MAX14930BASE+	MAXIM	获取价格	4-Channel, 1kVRMS and 2.75kVRMS, Digital Isolators
MAX14930BASE+T	MAXIM	获取价格	DGTL ISO 2.75KV GEN PURP 16SOIC

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