MAX1253:Stand-Alone, 10-Channel, 12-Bit System Monitors with Internal Temperature Sensor and VDD Monitor

The MAX1253/MAX1254 are stand-alone, 10-channel (8 external, 2 internal) 12-bit system monitor ADCs with internal reference. A programmable single-ended/differential mux accepts voltage and remote-diode temperature-sensor inputs. These devices independently monitor the input channels without microprocessor interaction and generate an interrupt when any variable exceeds user-defined limits. The MAX1253/MAX1254 configure both high and low limits, as well as the number of fault cycles allowed, before generating an interrupt. These ADCs can also perform recursive data averaging for noise reduction. Programmable wait intervals between conversion sequences allow the selection of the sample rate. At the maximum sampling rate of 94ksps (auto mode, single channel enabled), the MAX1253 consumes only 5mW (1.7mA at 3V). AutoShutdown™ reduces supply current to 190µA at 2ksps and to less than 8µA at 50sps. Stand-alone operation, combined with ease of use in a small package (16-pin TSSOP), makes the MAX1253/ MAX1254 ideal for multichannel system-monitoring applications. Low power consumption also makes these devices a good fit for hand-held and battery-powered applications.

Key Features
  • Monitor 10 Signals Without Processor Intervention
  • Eight External Channels Programmable as Temperature or Voltage Monitors
  • Intelligent Circuitry for Reliable Autonomous Measurement
    • Programmable Digital Averaging Filter
    • Programmable Fault Counter
  • Precision Measurements
    • 12-Bit Resolution
    • ±1 LSB INL, ±1 LSB DNL
    • ±0.75°C Temperature Accuracy (typ)
  • Flexible
    • Automatic Channel Scan Sequencer with
    • Programmable Intervals
    • Programmable Inputs: Single Ended/Differential,
    • Voltage/Temperature
    • Programmable Wait State
  • Internal 2.5V/4.096V Reference (MAX1253/MAX1254)
  • Remote Temperature Sensing Up to 10m (Differential Mode)
  • Single 3V or 5V Supply Operation
  • Small 16-Pin TSSOP Package
MAX1253, MAX1254: Typical Operating Circuit
MAX1253, MAX1254: Typical Operating Circuit
Applications/Uses
  • Remote Data Logging
  • Remote Telecom Networks
  • Server Farms
  • System Supervision
DataSheet
titleDownload file
MAX1253-MAX1254 Data SheetMAX1253-MAX1254.pdf
Parametrics
Part NumberResolution
(bits)
Input Chan.Conv. Rate
(ksps)
ADC ArchitectureData BusDiff/S.E. InputInternal VREF
(V)
External VREF
(V)
External VREF
(V)
Unipolar VIN
(V)
Bipolar VIN
(±V)
SNR
(dB)
THD
(dB)
INL
(±LSB)
Package/PinsBudgetary
Price
ADCmaxnominalminmaxmaxmaxSee Notes
MAX1253121094SARSPIBoth2.513.32.51.2570-761TSSOP/16$9.09 @1k
MAX12544.09654.0962.048TSSOP/16
Design kits & evaluation modules
Quality and Environmental Data
Related Products
  • MAX1272:Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range
  • MAX1254:Stand-Alone, 10-Channel, 12-Bit System Monitors with Internal Temperature Sensor and VDD Monitor
  • MAX1241:+2.7V, Low-Power, 12-Bit Serial ADCs in 8-Pin SO
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1253AEUENo Longer AvailableMAX1253AEUE+TSSOP,;16 pin;33.4 mm²-40°C to +85°CNo
MAX1253AEUE+ActiveTSSOP,;16 pin;33.4 mm²-40°C to +85°CLead Free
MAX1253AEUE+TActiveTSSOP,;16 pin;33.4 mm²-40°C to +85°CLead Free
MAX1253AEUE-TNo Longer AvailableMAX1253AEUE+TTSSOP;16 pin-40°C to +85°CSee data sheet
MAX1253BEUENo Longer AvailableMAX1253BEUE+TSSOP,;16 pin;33.4 mm²-40°C to +85°CNo
MAX1253BEUE+ActiveTSSOP,;16 pin;33.4 mm²-40°C to +85°CLead Free
MAX1253BEUE+TActiveTSSOP,;16 pin;33.4 mm²-40°C to +85°CLead Free
MAX1253BEUE-TNo Longer AvailableMAX1253BEUE+TTSSOP;16 pin-40°C to +85°CSee data sheet
MAX1253-MAX1254.pdf MAX1254
Temperature Monitoring Using the MAX1253/54 and MAX1153/54 MAX1254
MAX1253.pdf MAX1253
MAX1253-MAX1254.pdf MAX1254