MAX145:+2.7V, Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX

The MAX144/MAX145 low-power, 12-bit analog-to-digital converters (ADCs) are available in 8-pin µMAX® and DIP packages. Both devices operate with a single +2.7V to +5.25V supply and feature a 7.4µs successive- approximation ADC, automatic power-down, fast wake-up (2.5µs), an on-chip clock, and a high-speed, 3-wire serial interface. Power consumption is only 3.2mW (VDD = +3.6V) at the maximum sampling rate of 108ksps. At slower throughput rates, the automatic shutdown (0.2µA) further reduces power consumption. The MAX144 provides 2-channel, single-ended operation and accepts input signals from 0 to VREF. The MAX145 accepts pseudo-differential inputs ranging from 0 to VREF. An external clock accesses data-through the 3-wire serial interface, which is SPI™, QSPI™, and MICROWIRE™-compatible. Excellent dynamic performance and low power, combined with ease of use and small package size, make these converters ideal for battery-powered and data-acquisition applications, or for other circuits with demanding power-consumption and space requirements. For pin-compatible 10-bit ADCs, see the MAX157 and MAX159 data sheets.

Key Features
  • Single-Supply Operation (+2.7V to +5.25V)
  • Two Single-Ended Channels (MAX144) One Pseudo-Differential Channel (MAX145)
  • Low Power
    • 0.9mA (108ksps, +3V Supply)
    • 100µA (10ksps, +3V Supply)
    • 10µA (1ksps, +3V Supply)
    • 0.2µA (Power-Down Mode)
  • Internal Track/Hold
  • 108ksps Sampling Rate
  • SPI/QSPI/MICROWIRE-Compatible 3-Wire Serial Interface
  • Space-Saving 8-Pin µMAX Package
  • Pin-Compatible 10-Bit Versions Available
MAX144, MAX145: Pin Configuration
MAX144, MAX145: Pin Configuration
Applications/Uses
  • Battery-Powered Applications
  • Instrumentation
  • Isolated Data Acquisition
  • Medical Instruments
  • Portable Data Logging
  • Process Control Monitoring
  • System Supervision
  • Test Equipment
DataSheet
titleDownload file
MAX144-MAX145 Data SheetMAX144-MAX145.pdf
Parametrics
Part NumberResolution
(bits)
Input Chan.Conv. Rate
(ksps)
ADC ArchitectureData BusDiff/S.E. InputExternal VREF
(V)
External VREF
(V)
Unipolar VIN
(V)
THD
(dB)
INL
(±LSB)
Package/PinsBudgetary
Price
ADCmaxminmaxmaxSee Notes
MAX144122108SARSPIS.E. Only05.255.25-801µMAX/8
PDIP(N)/8
$7.39 @1k
MAX1451µMAX/8
PDIP(N)/8
$5.83 @1k
Quality and Environmental Data
Related Products
  • MAX1329:12-/16-Bit DAS with ADC, DACs, DPIOs, APIOs, Reference, Voltage Monitors, and Temp Sensor
  • MAX1393:1.5V to 3.6V, 312.5ksps, 1-Channel True-Differential/2-Channel Single-Ended, 12-Bit, SAR ADCs
  • MAX1288:150ksps, 12-Bit, 2-Channel Single-Ended, and 1-Channel True-Differential ADCs
  • MAX1284:400ksps/300ksps, Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference
  • MAX157:+2.7V, Low-Power, 2-Channel, 108ksps, Serial 10-Bit ADCs in 8-Pin µMAX
  • MAX159:+2.7V, Low-Power, 2-Channel, 108ksps, Serial 10-Bit ADCs in 8-Pin µMAX
  • MAX1330:12-/16-Bit DAS with ADC, DAC, DPIOs, APIOs, Reference, Voltage Monitors, and Temp Sensor
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX145ACPANo Longer AvailableMAX145ACPA+PDIP(N),;8 pin;79.7 mm²0°C to +70°CNo
MAX145ACPA+ActivePDIP(N),;8 pin;79.7 mm²0°C to +70°CLead Free
MAX145ACUANo Longer AvailableMAX145ACUA+µMAX,;8 pin;15.6 mm²0°C to +70°CNo
MAX145ACUA+ActiveµMAX,;8 pin;15.6 mm²0°C to +70°CLead Free
MAX145ACUA+TActiveµMAX,;8 pin;15.6 mm²0°C to +70°CLead Free
MAX145ACUA-TNo Longer AvailableMAX145ACUA+TµMAX,;8 pin;15.6 mm²0°C to +70°CNo
MAX145AEPANo Longer AvailableMAX145AEPA+PDIP(N),;8 pin;79.7 mm²-40°C to +85°CNo
MAX145AEPA+ActivePDIP(N),;8 pin;79.7 mm²-40°C to +85°CLead Free
MAX145AEUANo Longer AvailableMAX145AEUA+µMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX145AEUA+ActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX145AEUA+TActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX145AEUA-TNo Longer AvailableMAX145AEUA+TµMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX145BCPANo Longer AvailableMAX145BCPA+PDIP(N),;8 pin;79.7 mm²0°C to +70°CNo
MAX145BCPA+ActivePDIP(N),;8 pin;79.7 mm²0°C to +70°CLead Free
MAX145BCUANo Longer AvailableMAX145BCUA+µMAX,;8 pin;15.6 mm²0°C to +70°CNo
MAX145BCUA+ActiveµMAX,;8 pin;15.6 mm²0°C to +70°CLead Free
MAX145BCUA+TActiveuMAX;8 pin0°C to +70°CSee data sheet
MAX145BCUA-TNo Longer AvailableMAX145BCUA+TuMAX;8 pin0°C to +70°CSee data sheet
MAX145BEPANo Longer AvailableMAX145BEPA+PDIP(N),;8 pin;79.7 mm²-40°C to +85°CNo
MAX145BEPA+ActivePDIP(N),;8 pin;79.7 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX145BEUANo Longer AvailableMAX145BEUA+µMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX145BEUA+ActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX145BEUA+TActiveuMAX;8 pin-40°C to +85°CSee data sheet
MAX145BEUA-TNo Longer AvailableMAX145BEUA+TuMAX;8 pin-40°C to +85°CSee data sheet
MAX144-MAX145.pdf MAX145
MAX145.pdf MAX145
MAX144-MAX145.pdf MAX145