MAX1409 General Description
The MAX1407/MAX1408/MAX1409/MAX1414 are lowpower, general-purpose, multichannel data-acquisition systems (DAS). These devices are optimized for lowpower applications. All the devices operate from a single +2.7V to +3.6V power supply and consume a maximum of 1.15mA in Run mode and only 2.5µA in Sleep mode.
The MAX1407/MAX1408/MAX1414 feature a differential 8:1 input multiplexer to the ADC, a programmable three-state digital output, an output to shutdown an external power supply, and a data ready output from the ADC. The MAX1408 has eight auxiliary analog inputs, while the MAX1407/MAX1414 include four auxiliary analog inputs and two 10-bit force/sense DACs. The MAX1414 features a 50mV trip threshold for the signal-detect comparator while the others have a 0mV trip threshold. The MAX1409 is a 20-pin version of the DAS family with a differential 4:1 input multiplexer to the ADC, one auxiliary analog input, and one 10-bit force/sense DAC.
The MAX1407/MAX1408/MAX1414 are available in space-saving 28-pin SSOP packages, while the MAX1409 is available in a 20-pin SSOP package.
MAX1409 Maximum Ratings
AVDD to AGND .........................................................-0.3V to +6V
AVDD to DVDD ..................................................... -0.3V to +0.3V
Analog Inputs to AGND..........................-0.3V to +(AVDD + 0.3V)
Digital Inputs to DGND.............................................-0.3V to +6V
Maximum Current Input Into Any Pin .................................50mA
Continuous Power Dissipation............................... (TA = +70°C)
20-Pin SSOP (derate 8.0mW/°C above +70°C) ..............640mW
28-Pin SSOP (derate 9.52mW/°C above +70°C) ............762mW
DVDD to DGND.........................................................-0.3V to +6V
AGND to DGND......................................................-0.3V to +0.3V
Analog Outputs to AGND ......................-0.3V to +(AVDD + 0.3V)
Digital Outputs to DGND .......................-0.3V to +(AVDD + 0.3V)
REF to AGND..........................................-0.3V to +(AVDD + 0.3V)
Operating Temperature Range:
MAX14__CA_ .........................................................0°C to +70°C
MAX14__EA_ ......................................................-40°C to +85°C
Lead Temperature (soldering, 10s) ...............................+300 °C
Storage Temperature Range ............................-65°C to +150°C
Junction Temperature......................................................+150°C
MAX1409 Features
+2.7V to +3.6V Supply Voltage Range in Standby,
Idle, and Run Mode (Down to 1.8V in Sleep Mode)
1.15mA Run Mode Supply Current
2.5µA Sleep Mode Supply Current (Wake-Up, RTC,
and Voltage Monitor Active)
Multichannel 16-Bit Sigma-Delta ADC
±1.5 LSB (typ) Integral Nonlinearity
30Hz or 60Hz Continuous Conversion Rate
Buffered or Unbuffered Mode
Gain of +1/3, +1, or +2V/V
Unipolar or Bipolar Mode
On-Chip Offset Calibration
10-Bit Force/Sense DACs
Buffered 1.25V, 18ppm/°C (typ) Bandgap
Reference Output
SPI™/QSPI™ or MICROWIRE™-Compatible Serial
Interface
System Support Functions
RTC (Valid til 9999) and Alarm
High-Frequency PLL Clock Output (2.4576MHz)
+1.8V and +2.7V RESET and Power-Supply
Voltage Monitors
Signal Detect Comparator
Interrupt Generator (INT and DRDY)
Three-State Digital Output
Wake-Up Circuitry
28-Pin SSOP (MAX1407/MAX1408/MAX1414),
20-Pin SSOP (MAX1409)
MAX1409 Typical Application
Medical Instruments
Industrial Control Systems
Portable Equipment
Data-Acquisition System
Automatic Testing
Robotics
MAX1409 Connection Diagram
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