MAX1204BCPP+

MAX1204 5V, 8-Channel, Serial, 10-Bit ADC with 3V Digital Interface _______________General Description ____________________________Features The 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. o 8-Channel Single-Ended or 4-Channel Differential Inputs o Operates from +5V Single or ±5V Dual Supplies o User-Adjustable Output Logic Levels (2.7V to 5.25V) o Low Power: 1.5mA (Operating Mode) 2µA (Power-Down Mode) o Internal Track/Hold, 133kHz Sampling Rate o Internal 4.096V Reference o SPI/MICROWIRE/TMS320-Compatible 4-Wire Serial Interface o Software-Configurable Unipolar/Bipolar Inputs o 20-Pin PDIP/SSOP o Pin-Compatible 12-Bit Upgrade: MAX1202 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 serial-interface 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 10µA at reduced sampling rates. The MAX1204 is available in 20-pin SSOP and PDIP packages, and is specified for the commercial and extended temperature ranges. ______________Ordering Information PART TEMP RANGE PINPACKAGE TOP MARK MAX1204ACPP+ 0°C to +70°C 20 PDIP MAX1204BCPP+ 0°C to +70°C 20 PDIP ±1/2 ±1 MAX1204ACAP+ 0°C to +70°C 20 SSOP ±1/2 MAX1204BCAP+ 0°C to +70°C 20 SSOP ±1 Ordering Information continued at end of data sheet. +Denotes a lead(Pb)-free/RoHS-compliant package. __________________Pin Configuration ________________________Applications 5V/3V Mixed-Supply Systems TOP VIEW Data Acquisition CH0 1 Process Control CH1 2 Battery-Powered Instruments CH2 3 Medical Instruments + 20 VDD 19 SCLK 18 CS MAX1204 CH3 4 CH4 5 16 SSTRB CH5 6 15 DOUT CH6 7 14 VL CH7 8 13 GND VSS 9 12 REFADJ 11 REF SHDN 10 Typical Operating Circuit appears on last page. MICROWIRE is a registered trademark of National Semiconductor Corp. 17 DIN PDIP/SSOP For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. 19-1179; Rev 1; 1/12 MAX1204 5V, 8-Channel, Serial, 10-Bit ADC with 3V Digital Interface ABSOLUTE MAXIMUM RATINGS VDD 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 CH0–CH7 to GND ............................(VSS - 0.3V) to (VDD + 0.3V) CH0–CH7 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) PDIP (derate 11.11mW/°C above +70°C) .....................889mW SSOP (derate 8.00mW/°C above +70°C) .....................640mW Operating Temperature Ranges MAX1204_C_P .....................................................0°C to +70°C MAX1204_E_P ..................................................-40°C to +85°C Storage Temperature Range .............................-60°C to +150°C Soldering Temperature (reflow) .......................................+260°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. ELECTRICAL CHARACTERISTICS (VDD = +5V ±5%, VL = 2.7V to 3.6V; VSS = 0V or -5V ±5%; fSCLK = 2.0MHz, external clock (50% duty cycle); 15 clocks/conversion cycle (133ksps); 4.7µF capacitor at REF; TA = TMIN to TMAX; unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY (Note 1) Resolution 10 Relative Accuracy (Note 2) INL Differential Nonlinearity DNL Offset Error Gain Error (Note 3) Gain Temperature Coefficient Bits MAX1204A ±0.5 MAX1204B ±1.0 No missing codes over temperature ±1.0 MAX1204A ±1.0 MAX1204B ±2.0 MAX1204A ±1.0 MAX1204B ±2.0 External reference, 4.096V Channel-to-Channel Offset Matching LSB LSB LSB LSB ±0.8 ppm/°C ±0.1 LSB DYNAMIC SPECIFICATIONS (10kHz sine-wave input, 4.096VP-P, 133ksps, 2.0MHz external clock, bipolar input mode) Signal-to-Noise + Distortion Ratio SINAD 66 dB Total Harmonic Distortion (up to the 5th harmonic) THD -70 dB Spurious-Free Dynamic Range SFDR 70 dB Channel-to-Channel Crosstalk VIN = 4.096VP-P, 65kHz (Note 4) -75 dB Small-Signal Bandwidth -3dB rolloff 4.5 MHz 800 kHz Full-Power Bandwidth 2 Maxim Integrated MAX1204 5V, 8-Channel, Serial, 10-Bit ADC with 3V Digital Interface ELECTRICAL CHARACTERISTICS (continued) (VDD = +5V ±5%, VL = 2.7V to 3.6V; VSS = 0V or -5V ±5%; fSCLK = 2.0MHz, external clock (50% duty cycle); 15 clocks/conversion cycle (133ksps); 4.7µF capacitor at REF; TA = TMIN to TMAX; unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS CONVERSION RATE Conversion Time (Note 5) tCONV Track/Hold Acquisition Time tACQ Internal clock External clock, 2MHz, 12 clocks/conversion 5.5 10 6 1.5 µs µs Aperture Delay 10 ns Aperture Jitter