MAX1224

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


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Description

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.
MAX1224, MAX1225: Typical Operating Circuit MAX1224, MAX1225: Typical Operating Circuit Enlarge+

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

Applications/Uses

  • Bill Validation
  • Communications
  • Data Acquisition
  • Motor Control
  • Portable Instrumentation

See parametric specs for Precision ADCs (< 5Msps) (437)


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
MAX1224 1211500SARSPIDiff. Only13.63.61.869-801.5
TQFN/12
$8.01 @500

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Request Reliability Report for: MAX1224 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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