Features: 1.5Msps Sampling Rate
Only 22mW (typ) Power Dissipation
Only 1µA (max) Shutdown Current
High-Speed, SPI-Compatible, 3-Wire Serial Interface
68.5dB S/(N + D) at 525kHz Input Frequency
Internal True-Differential Track/Hold (T/H)
Internal 2.048V Reference
No Pipeline Delays
Small 12-Pin TQFN PackageApplication-Data Acquisition
-Communications
-Bill Validation
-Portable Instruments
-Motor ControlPinout
SpecificationsVDD to GND..............................................................-0.3V to +6V
VL to GND................-0.3V to the lower of (VDD+ 0.3V) and +6V
Digital Inputs
to GND.................-0.3V to the lower of (VDD + 0.3V) and +6V
Digital Output
to GND....................-0.3V to the lower of (VL + 0.3V) and +6V
Analog Inputs and
REF to GND..............-0.3V to the lower of (VDD+ 0.3V) and +6V
RGND to GND.......................................................-0.3V to +0.3V
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (TA= +70°C)
12-Pin TQFN (derate 16.9mW/°C above +70°C).........1349mW
Operating Temperature Ranges
MAX127_ _ CTC....................................................0°C to +70°C
MAX127_ _ ETC..................................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range...........................-60°C to +150°C
Lead Temperature (soldering, 10s).................................+300°CDescriptionThe MAX1277/MAX1279 are low-power, high-speed, seri-al-output, 12-bit, analog-to-digital converters (ADCs) with an internal reference that operates at up to 1.5Msps.These devices feature true-differential inputs, offering bet-ter 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 MAX1277/MAX1279 operate from a single +2.7V to +3.6V supply voltage. The MAX1277/MAX1279 include a 2.048V internal reference. The MAX1277 has a unipolar analog input, while the MAX1279 has a bipolar analog input. These devices feature a partial power-down mode and a full power-down mode for use between conver-sions, 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 LSB INL) make the MAX1277/MAX1279 ideal for industrial process control, motor control, and base-station applications.
The MAX1277/MAX1279 come in a 12-pin TQFN pack-age, and are available in the commercial (0°C to +70°C) and extended (-40°C to +85°C) temperature ranges.
MAX1279 Data Sheet
