MAX1149:Multichannel, True-Differential, Serial, 14-Bit ADCs

The MAX1146–MAX1149 low-power, 14-bit, multichannel, analog-to-digital converters (ADCs) feature an internal track/hold (T/H), voltage reference, and clock. The MAX1146/MAX1148 operate from a single +4.75V to +5.25V supply, and the MAX1147/MAX1149 operate from a single +2.7V to +3.6V supply. All analog inputs are software configurable for unipolar/bipolar and single-ended/differential operation. The 4-wire serial interface connects directly to SPI™/QSPI™/MICROWIRE™ devices without external logic. The serial strobe output (SSTRB) allows convenient connection to digital signal processors. The MAX1146–MAX1149 use an internal clock or an external serial-interface clock to perform successive-approximation analog-to-digital conversions. The MAX1146/MAX1148 include an internal +4.096V reference, while the MAX1147/MAX1149 include an internal +2.500V reference. All devices accept an external reference from 1.5V to VDD. The MAX1146–MAX1149 provide a hardware shutdown and two software power-down modes. Using the software power-down modes allows the devices to be powered down between conversions. When powered down, accessing the serial interface automatically powers up the devices. The quick turn-on time allows power-down between all conversions. This technique reduces supply current to under 120µA for quick turn-on. The MAX1146–MAX1149 are available in a 20-pin TSSOP package.

Key Features
  • 8-Channel Single-Ended or 4-Channel Differential Inputs (MAX1148/MAX1149)
  • 4-Channel Single-Ended or 2-Channel Differential Inputs (MAX1146/MAX1147)
  • Internal Multiplexer and T/H
  • Single-Supply Operation
    • 4.75V to 5.25V Supply (MAX1146/MAX1148)
    • 2.7V to 3.6V Supply (MAX1147/MAX1149)
  • Internal Reference
    • +4.096V (MAX1146/MAX1148)
    • +2.500V (MAX1147/MAX1149)
  • 116ksps Sampling Rate
  • Low Power
    • 1.1mA (116ksps)
    • 120µA (10ksps)
    • 12µA (1ksps)
    • 300nA (Power-Down Mode)
  • SPI-/QSPI-/MICROWIRE Compatible
  • 20-Pin TSSOP
MAX1146, MAX1147, MAX1148, MAX1149: Pin Configuration
MAX1146, MAX1147, MAX1148, MAX1149: Pin Configuration
Applications/Uses
  • Battery-Powered Instruments
  • Data Acquisition
  • Medical Instruments
  • Portable Data Logging
  • Process Control
DataSheet
titleDownload file
MAX1146-MAX1149 Data SheetMAX1146-MAX1149.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
MAX1146144116SARSPIBoth4.0961.554.0964.09681-960.7TSSOP/20$9.80 @1k
MAX114742.53.32.52.5TSSOP/20$11.47 @1k
MAX114884.09654.0964.096TSSOP/20$12.60 @1k
MAX114982.53.32.52.5TSSOP/20$14.62 @1k
Design kits & evaluation modules
Related Products
  • MAX11101:14-Bit, +5V, 200ksps ADC with 10µA Shutdown
  • MAX1033:8- and 4-Channel, ±3 x VREF Multirange Inputs, Serial 14-Bit ADCs
  • MAX1035:8-/4-Channel, ±VREF Multirange Inputs, Serial 14-Bit ADCs
  • MAX1067:Multichannel, 14-Bit, 200ksps Analog-to-Digital Converters
  • MAX1247:+2.7V, Low-Power, 4-Channel, Serial 12-Bit ADCs in QSOP-16
  • MAX1248:+2.7V to +5.25V, Low-Power, 4-Channel, Serial, 10-Bit ADCs in QSOP-16
  • MAX1246:+2.7V, Low-Power, 4-Channel, Serial 12-Bit ADCs in QSOP-16
  • MAX1249:+2.7V to +5.25V, Low-Power, 4-Channel, Serial, 10-Bit ADCs in QSOP-16
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1149BCUPNo Longer AvailableMAX1149BCUP+TSSOP,;20 pin;45.2 mm²0°C to +70°CNo
MAX1149BCUP+ActiveTSSOP,;20 pin;45.2 mm²0°C to +70°CLead Free
MAX1149BCUP+TActiveTSSOP,;20 pin;45.2 mm²0°C to +70°CLead Free
MAX1149BCUP-TNo Longer AvailableMAX1149BCUP+TTSSOP;20 pin0°C to +70°CSee data sheet
MAX1149BEUPNo Longer AvailableMAX1149BEUP+TSSOP,;20 pin;45.2 mm²-40°C to +85°CNo
MAX1149BEUP+ActiveTSSOP,;20 pin;45.2 mm²-40°C to +85°CLead Free
MAX1149BEUP+TActiveTSSOP,;20 pin;45.2 mm²-40°C to +85°CLead Free
MAX1149BEUP-TNo Longer AvailableMAX1149BEUP+TTSSOP;20 pin-40°C to +85°CSee data sheet
MAX1146-MAX1149.pdf MAX1149
MAX1146-MAX1149_cn.pdf MAX1149
MAX1146-MAX1149_cn.pdf MAX1149