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MAX1497

Category:Instruments and equipment
Product Name:.5- and 4.5-bit, monolithic LED driver and μC interface ADCs
Manufacturers:MAXIM
Production Batch Number:12+
Encapsulation:SOP
Stock Status:There is stock
Stock Quantity:30000
Minimum order quantity: 1
Details:

Product introduction

MAX1497

.5- and 4.5-bit, monolithic LED driver and μC interface ADCs

description

The MAX1497/MAX1499 low-power, 3.5- and 4.5-digital, analog-to-digital converters (ADCs) integrate light-emitting diode (LED) drivers that operate from a single 2.7V to 5.25V supply. They include internal references, a high-precision on-chip oscillator, and a multiplexed LED display driver. An internal charge pump generates a negative supply, which is required for an integrated input buffer that operates from a single supply. The ADC is configured for an input range of ±2V or ±200mV and an LED and/or microcontroller (μC) that outputs its conversion results. IT IS POSSIBLE FOR MICROCONTROLLERS TO COMMUNICATE VIA AN SPI™-/QSPI™-/MICROWIRE-COMPATIBLE™ SERIAL INTERFACE. The MAX1497 is a 3.5-bit (±1999 count) device, while the MAX1499 is a 4.5-bit (±19,999 count) device.

The MAX1497/MAX1499 do not require external precision integrating capacitors, autozero capacitors, crystal oscillators, charge pumps, or other circuitry required for dual-slope ADCs commonly used in panel instrumentation circuits.

The devices also feature on-chip buffers, differential signals, and reference inputs that allow direct interfacing with high impedance signal sources. In addition, they use continuous internal offset calibration and provide 100 dB rejection at 50Hz and 60Hz power supply noise. Other features include data hold, peak detection, overrange and underrange detection, and a user-programmable low battery monitor.

The MAX1499 is a 32-pin, 7mm x 7mm TQFP package with the MAX1497 available in 28-pin SSOP and 28-pin PDIP packages. All devices in this family operate over the extended temperature range of -40°C to +85°C.

Key features

High resolution
- MAX1499: 4.5-bit (±19,999 count)
- MAX1497: 3.5-bit (±1999 count)
Σ-ΔDC architecture
- There is no integrated capacitor
- There is no auto-zero capacitor
- > 100dB for both 50Hz and 60Hz rejection
Operate from a single 2.7V or 5.25V supply
Selectable input range± 200mV or ±2V
Selectable voltage reference: internal 2.048V or external
Internal high-precision oscillator eliminates the need for external components
Automatic offset calibration
Low power consumption (excluding LED drive current)
- Maximum operating current of 664μA
- 268μA maximum shutdown current
Small 32-pin, 7 mm x 7 mm TQFP package (4.5-bit), 28-pin SSOP package (3.5-bit)
Also available in PDIP package (3.5-bit)
Multiplexed LED driver resistors programmable segment current
SPI-/QSPI-/MICROWIRE-Compatible serial interface
Extended Temperature Range (-40°C to +85°C)

Application/Purpose

Digital multimeter
Digital panel table
Digital voltmeter
Handheld meters

andMAX1497Related ICs are:

Model	Manufacturers	lot number	encapsulation	illustrate
MAX1497	MAXIM	12+	SOP	.5- and 4.5-bit, monolithic LED driver and μC interface ADCs
LT1497CS	LINEAR	09+	SOP16	Dual 125 mA, 50MHz current feedback amplifiers

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