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 Package
ApplicationData Acquisition
Communications
Bill Validation
Portable Instruments
Motor Control
Pinout
Specifications
| VDD to GND..............................................................-0.3V to +6V |
| VL to GND ...................-0.3V to the lower of (VDD + 0.3V) or +6V |
| Digital Inputs to GND ....................-0.3V to the lower of (VDD + 0.3V) or +6V |
| Digital Output to GND.......................-0.3V to the lower of (VL + 0.3V) or +6V |
| Analog Inputs and |
| REF to GND.............-0.3V to the lower of (VDD + 0.3V) or +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°C |
DescriptionThe MAX1278 are low-power, high-speed, serial- 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 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 MAX1278 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 conversions, 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 MAX1278 come in a 12-pin TQFN package, and are available in the commercial (0°C to +70°C) and extended (-40°C to +85°C) temperature ranges.
MAX1278 Data Sheet
