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Maxim > Products > [Analog-to-Digital Converters] 
MAX1447, MAX1496, MAX1498
3.5- and 4.5-Digit, Single-Chip ADCs with LED Drivers


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 920kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

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.

Key Features   Applications/Uses
  • 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 744µA Operating Current (MAX1496)
    • Maximum 960µA Operating Current (MAX1447/MAX1498)
    • Maximum 325µA 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)

 
  		• Digital Multimeters
  		• Digital Panel Meters
  		• Digital Voltmeters
  		• Handheld meters

    Key Specifications:  Dual-Slope & Display-Oriented ADCs
    Part Number Resolution
    (±Counts)    		 Output Type ICC
    (mA)    		 Ref.
    (V)    		 VSUPPLY
    (V)    		 Package/Pins Smallest Available Pckg.
    (mm2)    		 Oper. Temp.
    (°C)    		 Price
    typ max w/pins See Notes
    MAX1447  20000
    Common Cathode
    LED
    		 1 Int./Ext. 2.7 to 5.25
    LQFP/32
    		 83 -40 to +85 $6.18 @1k
    MAX1496  2000
    PDIP(W)/28
    SSOP/28
    		 82 $3.96 @1k
    MAX1498  20000
    LQFP/32
    		 83 $6.18 @1k
    See All Dual-Slope & Display-Oriented ADCs (31)

    Diagram
    MAX1447, MAX1496, MAX1498: Pin Configuration
    Pin Configuration

    Application Notes
  		• Application Note 2102: Migrating from Integrating ADC Architectures to Sigma Delta - MAX1496, MAX1498
  		• Application Note 3418: Understanding the Effects of Clock Tolerances on 50/60Hz Noise Rejection in High Performance Sigma Delta ADCs - MAX1447, MAX1496, MAX1498
  		• Application Note 3635: Implementing an External Reference and the Resulting Effect on Gain for the MAX149x Sigma-Delta Panel-Meter ADCs - MAX1447, MAX1496, MAX1498

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-14 of 14

    MAX1447 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1447ECJ    
    		Active LQFP;32 pin;83 mm²
    Outline Drawing: 21-0054 (PDF)
    Land Pattern: 90-0111 (PDF)
    Use pkgcode/variation: C32-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1447ECJ-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX1447ECJ+  
    		Active LQFP;32 pin;83 mm²
    Outline Drawing: 21-0054 (PDF)
    Land Pattern: 90-0111 (PDF)
    Use pkgcode/variation: C32+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1447ECJ+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX1496 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1496EPI    
    		Active PDIP(W);28 pin;593 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P28-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1496EPI+  
    		Active PDIP(W);28 pin;593 mm²
    Outline Drawing: 21-0044 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P28+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1496EAI    
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28-1*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1496EAI-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX1496EAI+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX1496EAI+  
    		Active SSOP;28 pin;82 mm²
    Outline Drawing: 21-0056 (PDF)
    Land Pattern: 90-0095 (PDF)
    Use pkgcode/variation: A28+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1498 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1498ECJ    
    		Active LQFP;32 pin;83 mm²
    Outline Drawing: 21-0054 (PDF)
    Land Pattern: 90-0111 (PDF)
    Use pkgcode/variation: C32-2*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1498ECJ-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX1498ECJ+T    
    		Active LQFP;32 pin;83 mm²
    Outline Drawing: 21-0054 (PDF)
    Land Pattern: 90-0111 (PDF)
    Use pkgcode/variation: C32+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX1498ECJ+  
    		Active LQFP;32 pin;83 mm²
    Outline Drawing: 21-0054 (PDF)
    Land Pattern: 90-0111 (PDF)
    Use pkgcode/variation: C32+2*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Related Products
    MAX1491, MAX1493, MAX1495 3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers

    More Like This: View Product Families for Similar Products

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    Document Ref.: 19-3166; Rev 0; 2004-03-29
    This page last modified: 2009-10-12


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