Analog Devices MAX1224 Product Info

• 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

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 (V_L), which allows direct interfacing to +1.8V to V_DD 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.

Applications

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