MAX1274:1.8Msps, Single-Supply, Low-Power, True-Differential, 12-Bit ADCs

The MAX1274/MAX1275 low-power, high-speed, serial-output, 12-bit, analog-to-digital converters (ADCs) operate at up to 1.8Msps. 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 MAX1274/MAX1275 operate from a single +4.75V to +5.25V supply voltage and require an external reference. The MAX1274 has a unipolar analog input, while the MAX1275 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 1mA (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 LSB INL) make the MAX1274/MAX1275 ideal for industrial process control, motor control, and base-station applications. The MAX1274/MAX1275 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 45mW (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)
  • External Reference
  • No Pipeline Delays
  • Small 12-Pin TQFN Package
MAX1274, MAX1275: Typical Operating Circuit
MAX1274, MAX1275: Typical Operating Circuit
Applications/Uses
  • Bill Validation
  • Communications
  • Data Acquisition
  • Motor Control
  • Portable Instrumentation
DataSheet
titleDownload file
MAX1274-MAX1275 Data SheetMAX1274-MAX1275.pdf
Parametrics
Part NumberResolution
(bits)
Input Chan.Conv. Rate
(ksps)
ADC ArchitectureData BusDiff/S.E. InputExternal VREF
(V)
External VREF
(V)
Unipolar VIN
(V)
Bipolar VIN
(±V)
THD
(dB)
INL
(±LSB)
Package/PinsBudgetary
Price
ADCmaxminmaxmaxmaxSee Notes
MAX12741211800SARSPIDiff. Only15.254.0962.048-801.75TQFN/12$4.66 @1k
MAX1275TQFN/12$7.53 @1k
Quality and Environmental Data
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
  • MAX1276:1.8Msps, Single-Supply, Low-Power, True-Differential, 12-Bit ADCs with Internal Reference
  • MAX1072:1.8Msps, Single-Supply, Low-Power, True-Differential, 10-Bit ADCs
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1274AETC+ActiveTQFN,;12 pin;16.8 mm²-40°C to +85°CLead Free
MAX1274BCTCNo Longer AvailableMAX1274BETC+TQFN,;12 pin;16.8 mm²0°C to +70°CNo
MAX1274BCTC-TNo Longer AvailableMAX1274BETC+QFN;0°C to +70°CSee data sheet
MAX1274BETCNo Longer AvailableMAX1274BETC+TQFN,;12 pin;16.8 mm²-40°C to +85°CNo
MAX1274BETC+ActiveTQFN,;12 pin;16.8 mm²-40°C to +85°CLead Free
MAX1274BETC+TActiveQFN;-40°C to +85°CSee data sheet
MAX1274BETC-TNo Longer AvailableMAX1274BETC+TQFN;-40°C to +85°CSee data sheet
MAX1274CTCNo Longer AvailableTHNQFN;0°C to +70°CSee data sheet
MAX1274ETCNo Longer AvailableTHNQFN;-40°C to +85°CSee data sheet
MAX1274-MAX1275.pdf MAX1275
MAX1274-MAX1275_cn.pdf MAX1275
MAX1274.pdf MAX1274
MAX1274-MAX1275_cn.pdf MAX1275