MAX1496:3.5- and 4.5-Digit, Single-Chip ADCs with LED Drivers

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
  • 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)
MAX1447, MAX1496, MAX1498: Pin Configuration
MAX1447, MAX1496, MAX1498: Pin Configuration
Applications/Uses
  • Digital Multimeters
  • Digital Panel Meters
  • Digital Voltmeters
  • Handheld meters
DataSheet
titleDownload file
MAX1447-MAX1498 Data SheetMAX1447-MAX1498.pdf
Parametrics
Part NumberResolution
(±Counts)
Conv. Rate
(ksps)
Data BusDiff/S.E. InputInternal VREF
(V)
External VREF
(V)
External VREF
(V)
Bipolar VIN
(±V)
INL
(±LSB)
Package/PinsBudgetary
Price
maxnominalminmaxmaxSee Notes
MAX1447200000.0057-SegmentDiff. Only2.04802.04821LQFP/32$11.53 @500
MAX14962000PDIP(W)/28
SSOP/28
$5.52 @1k
MAX149820000LQFP/32$11.53 @1k
Related Products
  • MAX1495:3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers
  • MAX1493:3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers
  • MAX1491:3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1496EAINo Longer AvailableMAX1496EAI+SSOP,;28 pin;81.6 mm²-40°C to +85°CSee data sheet
MAX1496EAI+ActiveSSOP,;28 pin;81.6 mm²-40°C to +85°CLead Free
MAX1496EAI+TActiveSSOP,;28 pin;81.6 mm²-40°C to +85°CLead Free
MAX1496EAI-TNo Longer AvailableMAX1496EAI+TSSOP;28 pin-40°C to +85°CSee data sheet
MAX1496EPINo Longer AvailableMAX1496EPI+PDIP(W),;28 pin;592.6 mm²-40°C to +85°CNo
MAX1496EPI+ActivePDIP(W),;28 pin;592.6 mm²-40°C to +85°CLead Free
MAX1447-MAX1498.pdf MAX1498
Delta-Sigma ADCs Replace Integrating ADCs for Panel Meters MAX1499
MAX1447-MAX1498.pdf MAX1498