MAX1224:1.5Msps, Single-Supply, Low-Power, True-Differential, 12-Bit ADCs

The MAX1224/MAX1225 low-power, high-speed, serial-output, 12-bit, analog-to-digital converters (ADCs) operate at up to 1.5Msps. 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 MAX1224/MAX1225 operate from a single +2.7V to +3.6V supply voltage and require an external reference. The MAX1224 has a unipolar analog input, while the MAX1225 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, good AC performance, and DC accuracy (±1.5 LSB INL) make the MAX1224/MAX1225 ideal for industrial process control, motor control, and base-station applications. The MAX1224/MAX1225 come in a 12-pin TQFN package, and are available in the extended (-40°C to +85°C) temperature range.

Key Features
  • 1.5Msps Sampling Rate
  • Only 18mW (typ) Power Dissipation
  • Only 1µA (max) Shutdown Current
  • High-Speed, SPI-Compatible, 3-Wire Serial Interface
  • 69dB S/(N + D) at 525kHz Input Frequency
  • Internal True-Differential Track/Hold (T/H)
  • External Reference
  • No Pipeline Delays
  • Small 12-Pin TQFN Package
MAX1224, MAX1225: Typical Operating Circuit
MAX1224, MAX1225: Typical Operating Circuit
Applications/Uses
  • Bill Validation
  • Communications
  • Data Acquisition
  • Motor Control
  • Portable Instrumentation
DataSheet
titleDownload file
MAX1224-MAX1225 Data SheetMAX1224-MAX1225.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)
SNR
(dB)
THD
(dB)
INL
(±LSB)
Package/PinsBudgetary
Price
ADCmaxminmaxmaxmaxSee Notes
MAX12241211500SARSPIDiff. Only13.63.61.869-801.5TQFN/12$7.63 @500
MAX1225TQFN/12-
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
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1224CTCNo Longer AvailableTQFN,;12 pin;16.8 mm²0°C to +70°CNo
MAX1224CTC+No Longer AvailableMAX1224ETC+TQFN,;12 pin;16.8 mm²0°C to +70°CLead Free
MAX1224CTC+TNo Longer AvailableMAX1224ETC+QFN;12 pin0°C to +70°CSee data sheet
MAX1224CTC-TNo Longer AvailableQFN;12 pin0°C to +70°CSee data sheet
MAX1224ETCNo Longer AvailableMAX1224ETC+TQFN,;12 pin;16.8 mm²-40°C to +85°CNo
MAX1224ETC+ActiveTQFN,;12 pin;16.8 mm²-40°C to +85°CLead Free
MAX1224ETC+TActiveTQFN,;12 pin;16.8 mm²-40°C to +85°CLead Free
MAX1224ETC-TNo Longer AvailableMAX1224ETC+TQFN;12 pin-40°C to +85°CSee data sheet
MAX1224-MAX1225.pdf MAX1225
MAX1224-MAX1225_cn.pdf MAX1225
MAX1224-MAX1225_cn.pdf MAX1225