EVALUATION KIT AVAILABLE MAX1202/MAX1203 5V, 8-Channel, Serial, 12-Bit ADCs with 3V Digital Interface General Description Features The MAX1202/MAX1203 are 12-bit data-acquisition sys- 8-Channel Single-Ended or 4-Channel Differential tems specifically designed for use in applications with Inputs mixed +5V (analog) and +3V (digital) supply voltages. Operates from Single +5V or Dual 5V Supplies They operate with a single +5V analog supply or dual 5V User-Adjustable Output Logic Levels analog supplies, and combine an 8-channel multiplexer, (2.7V to 5.25V) high-bandwidth track/hold, and serial interface with high Low Power: 1.5mA (Operating Mode) conversion speed and low power consumption. 2A (Power-Down Mode) Internal Track/Hold, 133kHz Sampling Rate A 4-wire serial interface connects directly to SPI/ Internal 4.096V Reference (MAX1202) MICROWIRE devices without external logic, and a serial strobe output allows direct connection to TMS320-family SPI/MICROWIRE/TMS320-Compatible digital signal processors. The MAX1202/MAX1203 use 4-Wire Serial Interface either the internal clock or an external serial-interface clock Software-Configurable Unipolar/Bipolar Inputs to perform successive approximation analog-to-digital con- 20-Pin PDIP/SSOP versions. The serial interface operates at up to 2MHz. Ordering Information The MAX1202 features an internal 4.096V reference, PIN- INL while the MAX1203 requires an external reference. Both PART TEMP RANGE PACKAGE (LSB) parts have a reference-buffer amplifier that simplifies gain MAX1202ACPP+ 0C to +70C 20 PDIP 1/2 trim. They also have a V pin that is the power supply for L the digital outputs. Output logic levels (3V, 3.3V, or 5V) are MAX1202BCPP+ 0C to +70C 20 PDIP 1 determined by the value of the voltage applied to this pin. MAX1202ACAP+ 0C to +70C 20 SSOP 1/2 These devices provide a hard-wired SHDN pin and two MAX1202BCAP+ 0C to +70C 20 SSOP 1 software-selectable power-down modes. Accessing the Ordering Information continued at end of data sheet. serial interface automatically powers up the devices. A +Denotes a lead(Pb)-free/RoHS-compliant package. quick turn-on time enables the MAX1202/MAX1203 to be shut down between conversions, allowing the user to optimize supply currents. By customizing power-down Pin Configuration between conversions, supply current can drop below 10A at reduced sampling rates. TOP VIEW + The MAX1202/MAX1203 are available in 20-pin SSOP 20 V CH0 1 DD and PDIP packages, and are specified for the commercial CH1 2 19 SCLK and extended temperature ranges. CH2 3 18 CS MAX1202 Applications CH3 4 17 DIN MAX1203 5V/3V Mixed-Supply Systems 5 CH4 16 SSTRB Data Acquisition CH5 6 15 DOUT High-Accuracy Process Control CH6 7 14 V L Battery-Powered Instruments CH7 8 13 GND Medical Instruments V 9 SS 12 REFADJ Typical Operating Circuit appears at end of data sheet. SHDN 11 REF 10 MICROWIRE is a registered trademark of National Semiconductor Corp. PDIP/SSOP 19-1173 Rev 3 3/12MAX1202/MAX1203 5V, 8-Channel, Serial, 12-Bit ADCs with 3V Digital Interface Absolute Maximum Ratings V to GND ............................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) DD A V ............................................................. -0.3V to (V + 0.3V) PDIP (derate 11.11mW/C above +70C) ....................889mW L DD V to GND .............................................................+0.3V to -6V SSOP (derate 8.00mW/C above +70C) ....................640mW SS V to V ............................................................-0.3V to +12V Operating Temperature Ranges DD SS CH0CH7 to GND .........................(V - 0.3V) to (V + 0.3V) MAX1202 C P/MAX1203 C P ..........................0C to +70C SS DD CH0CH7 Total Input Current ..........................................20mA MAX1202 E P/MAX1203 E P ...................... -40C to +85C REF to GND ............................................. -0.3V to (V + 0.3V) Storage Temperature Range ............................ -60C to +150C DD REFADJ to GND....................................... -0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C DD Digital Inputs to GND ............................... -0.3V to (V + 0.3V) Soldering Temperature (reflow) .......................................+260C DD Digital Outputs to GND ................................-0.3V to (V + 0.3V) L Digital Output Sink Current ................................................25mA 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. Electrical Characteristics (V = +5V 5%, V = 2.7V to 3.6V V = 0V or -5V 5% f = 2.0MHz, external clock (50% duty cycle) 15 clocks/conversion DD L SS SCLK cycle (133ksps) MAX12024.7F capacitor at REF pin MAX1203external reference, V = 4.096V applied to REF pin T = T REF A MIN to T , unless otherwise noted.) MAX PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY (Note 1) Resolution RES 12 Bits MAX1202A/MAX1203A 0.5 Relative Accuracy (Note 2) INL LSB MAX1202B/MAX1203B 1.0 Differential Nonlinearity DNL no missing codes over temperature 1.0 LSB Offset Error 3.0 LSB MAX1202 (all grades) 3 Gain Error (Note 3) MAX1203A 1.5 LSB External reference, 4.096V MAX1203B 3 Gain Temperature Coefficient External reference, 4.096V 0.8 ppm/C Channel-to-Channel Offset Matching 0.1 LSB DYNAMIC SPECIFICATIONS (10kHz sine-wave input, 4.096V , 133ksps, 2.0MHz external clock, bipolar-input mode) P-P Signal-to-Noise Plus Distortion Ratio SINAD 70 dB Total Harmonic Distortion (up to the THD -80 dB 5th Harmonic) Spurious-Free Dynamic Range SFDR 80 dB Channel-to-Channel Crosstalk V = 4.096V , 65kHz (Note 4) -85 dB IN P-P Small-Signal Bandwidth -3dB rolloff 4.5 MHz Full-Power Bandwidth 800 kHz Maxim Integrated 2 www.maximintegrated.com