MAX1278:1.8Msps, Single-Supply, Low-Power, True-Differential, 12-Bit ADCs with Internal Reference

The MAX1276/MAX1278 are low-power, high-speed, serial-output, 12-bit, analog-to-digital converters (ADCs) that operate at up to 1.8Msps and have an internal reference. These devices feature true-differential inputs, offering better noise immunity, distortion improvements, and a wider dynamic range over single-ended inputs. A standard SPI™/QSPI™/MICROWIRE™ interface provides the clock necessary for conversion. These devices easily interface with standard digital signal processor (DSP) synchronous serial interfaces. The MAX1276/MAX1278 operate from a single +4.75V to +5.25V supply voltage. The MAX1276/MAX1278 include a 4.096V internal reference. The MAX1276 has a unipolar analog input, while the MAX1278 has a bipolar analog input. These devices feature a partial power-down mode and a full power-down mode for use between conversions, which lower the supply current to 2mA (typ) and 1µA (max), respectively. Also featured is a separate power-supply input (VL), which allows direct interfacing to +1.8V to VDD digital logic. The fast conversion speed, low-power dissipation, excellent AC performance, and DC accuracy (±1.25 LSB INL) make the MAX1276/MAX1278 ideal for industrial process control, motor control, and base-station applications. The MAX1276/MAX1278 come in a 12-pin TQFN package, and are available in the extended (-40°C to +85°C) temperature range.

Key Features
  • 1.8Msps Sampling Rate
  • Only 55mW (typ) Power Dissipation
  • Only 1µA (max) Shutdown Current
  • High-Speed, SPI-Compatible, 3-Wire Serial Interface
  • 70dB S/(N + D) at 525kHz Input Frequency
  • Internal True-Differential Track/Hold (T/H)
  • Internal 4.096V Reference
  • No Pipeline Delays
  • Small 12-Pin TQFN Package
MAX1276, MAX1278: Typical Operating Circuit
MAX1276, MAX1278: Typical Operating Circuit
Applications/Uses
  • Bill Validation
  • Communications
  • Data Acquisition
  • Motor Control
  • Portable Instrumentation
DataSheet
titleDownload file
MAX1276-MAX1278 Data SheetMAX1276-MAX1278.pdf
Parametrics
Part NumberResolution
(bits)
Input Chan.Conv. Rate
(ksps)
ADC ArchitectureData BusDiff/S.E. InputInternal VREF
(V)
Unipolar VIN
(V)
Bipolar VIN
(±V)
THD
(dB)
INL
(±LSB)
Package/PinsBudgetary
Price
ADCmaxnominalmaxmaxSee Notes
MAX12761211800SARSPIDiff. Only4.0964.0962.048-801.25TQFN/12$5.06 @1k
MAX1278TQFN/12
Design kits & evaluation modules
Related Products
  • MAX11108:Tiny, 2.1mm x 1.6mm, 3Msps, Low-Power, Serial 12-Bit ADC
  • MAX11105:2Msps/3Msps, Low-Power, Serial 12-/10-/8-Bit ADCs
  • MAX1277:1.5Msps, Single-Supply, Low-Power, True-Differential, 12-Bit ADCs with Internal Reference
  • MAX1278:1.8Msps, Single-Supply, Low-Power, True-Differential, 12-Bit ADCs with Internal Reference
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1278CTCNo Longer AvailableTQFN,;12 pin;16.8 mm²0°C to +70°CNo
MAX1278CTC+No Longer AvailableMAX1278ETC+TQFN,;12 pin;16.8 mm²0°C to +70°CLead Free
MAX1278CTC+TNo Longer AvailableMAX1278ETC+QFN;12 pin0°C to +70°CSee data sheet
MAX1278CTC-TNo Longer AvailableQFN;12 pin0°C to +70°CSee data sheet
MAX1278ETCNo Longer AvailableMAX1278ETC+TQFN,;12 pin;16.8 mm²-40°C to +85°CNo
MAX1278ETC+ActiveTQFN,;12 pin;16.8 mm²-40°C to +85°CLead Free
MAX1278ETC+TActiveTQFN,;12 pin;16.8 mm²-40°C to +85°CLead Free
MAX1278ETC-TNo Longer AvailableMAX1278ETC+TQFN;12 pin-40°C to +85°CSee data sheet
MAX1276-MAX1278.pdf MAX1278
MAX1276-MAX1278.pdf MAX1278