Features: ` 8-Channel Single-Ended or 4-Channel Differential Inputs
` Operates from +5V Single or ±5V Dual Supplies
` User-Adjustable Output Logic Levels (2.7V to 5.25V)
` Low Power: 1.5mA (operating mode)
2A (power-down mode)
` Internal Track/Hold, 133kHz Sampling Rate
` Internal 4.096V Reference
` SPI/Microwire/TMS320-Compatible 4-Wire Serial Interface
` Software-Configurable Unipolar/Bipolar Inputs
` 20-Pin DIP/SSOP
` Pin-Compatible 12-Bit Upgrade: MAX1202Application·5V/3V Mixed-Supply Systems
·Data Acquisition
·Process Control
·Battery-Powered Instruments
·Medical InstrumentsPinout
SpecificationsVDD to GND.............................................................-0.3V to +6V
VL ..............................................................-0.3V to (VDD + 0.3V)
VSS to GND..............................................................+0.3V to -6V
VDD to VSS.............................................................-0.3V to +12V
CH0CH7 to GND..............................(VSS - 0.3V) to (VDD + 0.3V)
CH0CH7 Total Input Current...........................................±20mA
REF to GND..................................................-0.3V to (VDD + 0.3V)
REFADJ to GND ...........................................-0.3V to (VDD + 0.3V)
Digital Inputs to GND .................................-0.3V to (VDD + 0.3V)
Digital Outputs to GND .................................-0.3V to (VL + 0.3V)
Digital Output Sink Current ................................................25mA
Continuous Power Dissipation (TA = +70°C)
Plastic DIP (derate 11.11mW/°C above +70°C) .............889mW
SSOP (derate 8.00mW/°C above +70°C) .......................640mW
CERDIP (derate 11.11mW°C above +70°C)....................889mW
Operating Temperature Ranges
MAX1204_C_P ......................................................0°C to +70°C
MAX1204_E_P ...................................................-40°C to +85°C
MAX1204BMJP..................................................-55°C to +125°C
Storage Temperature Range ...........................-60°C to +150°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DescriptionThe MAX1204 is a 10-bit data-acquisition system specifically designed for use in applications with mixed +5V (analog) and +3V (digital) supply voltages. It operates with a single +5V analog supply or dual ±5V analog supplies, and combines an 8-channel multiplexer, internal track/hold, and serial interface with high conversion speed and low power consumption.
A 4-wire serial interface connects directly to SPI™/Microwire™ devices without external logic, and a serial strobe output allows direct connection to TMS320-family digital signal processors. The MAX1204 uses either the internal clock or an external serialinterface clock to perform successive-approximation analog-to-digital conversions. The serial interface operates at up to 2MHz.
The MAX1204 features an internal 4.096V reference and a reference-buffer amplifier that simplifies gain trim. It also has a VL pin that supplies power to the digital outputs. Output logic levels (3V, 3.3V, or 5V) are determined by the value of the voltage applied to this pin.
A hard-wired SHDN pin and two software-selectable power-down modes are provided. Accessing the serial interface automatically powers up the device. A quick turn-on time allows the MAX1204 to be shut down between conversions, enabling the user to optimize supply currents. By customizing power-down between conversions, supply current can drop below 10A at reduced sampling rates.
The MAX1204 is available in 20-pin SSOP and DIP packages, and is specified for the commercial, extended, and military temperature ranges.
MAX1204 Data Sheet
