MAX1492CAI

更新时间： 2024-02-16 00:58:58

品牌	Logo	应用领域
美信 - MAXIM		驱动器
页数	文件大小	规格书
35页	745K
描述
3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers

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数据手册

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MAX1492CAI 数据手册

19-2959; Rev 3; 5/04

3.5- and 4.5-Digit, Single-Chip ADCs

with LCD Drivers

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 ADC is configurable for

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

version results to an LCD and/or to a microcontroller

(µC). µC communication is facilitated through an

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 High Resolution

MAX1494: 4.5 Digits ( 19ꢀ999 ꢁountꢂ

MAX1492: 3.5 Digits ( 1999 ꢁountꢂ

o Sigma-Delta ADꢁ Architecture

No Integrating ꢁapacitors Required

No Autozeroing ꢁapacitors 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

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 ꢁomponents

o Automatic Offset ꢁalibration

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 ꢁurrent

Maximum 400µA Shutdown ꢁurrent

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

(4.5 Digitsꢂꢀ 28-Pin SSOP Package (3.5 Digitsꢂ

o Triplexed LꢁD Driver

o SPI-/QSPI-/MIꢁROWIRE-ꢁompatible Serial

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

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 MAX1494EVKITꢂ

Ordering Information

Applications

Digital Panel Meters

TEMP

PIN-

RESOLUTION

(DIGITSꢂ

PART

RANGE

PAꢁKAGE

Hand-Held Meters

MAX1492CAI 0°C to +70°C 28 SSOP

MAX1492CNI 0°C to +70°C 28 PDIP

MAX1494CCJ 0°C to +70°C 32 TQFP

3.5

4.5

Digital Voltmeters

Digital Multimeters

Pin Configurations appear at end of data sheet.

SPI/QSPI are trademarks of Motorola, Inc.

MICROWIRE is a 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+	MAXIM	获取价格	暂无描述
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

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