MAX1302 19-6249 Rev 0 3/12 8-Channel, V Multirange Inputs, REF Serial 16-Bit ADC General Description Features The MAX1302 multirange, low-power, 16-bit, succes- Software-Programmable Input Range for Each sive-approximation, analog-to-digital converter (ADC) Channel operates from a single +5V supply and achieves Single-Ended Input Ranges throughput rates up to 115ksps. A separate digital sup- 0V to +V /2, -V /2 to 0V, 0V to +V , REF REF REF ply allows digital interfacing with a 2.7V to 5.25V system -V to 0V, V /4, V /2, and V using the SPI-/QSPI-/MICROWIRE -compatible serial REF REF REF REF interface. Partial power-down mode reduces the supply Differential Input Ranges current to 1.3mA (typ). Full power-down mode reduces V /2, V , and 2 x V REF REF REF the power-supply current to 1A (typ). Eight Single-Ended or Four Differential Analog The MAX1302 provides eight (single-ended) or four Inputs (MAX1302) (true differential) analog input channels. Each analog input channel is independently software programmable 6V Overvoltage Tolerant Inputs for seven single-ended input ranges (0V to +V /2, REF Internal or External Reference -V /2 to 0V, 0V to +V , -V to 0V, V /4, REF REF REF REF V /2, and V ), and three differential input 115ksps Maximum Sample Rate REF REF ranges (V /2, V , 2 x V ). REF REF REF Single +5V Power Supply An on-chip +4.096V reference offers a small convenient 24-Pin TSSOP Package ADC solution. The MAX1302 also accepts an external reference voltage between 3.800V and 4.136V. The MAX1302 is available in a 24-pin TSSOP package Ordering Information and is specified for operation from -40C to +85C. PART PIN-PACKAGE C H A N N EL S MAX1302AEUG+ 24 TSSOP 8 Applications MAX1302BEUG+ 24 TSSOP 8 Note: All devices are specified over the -40C to +85C oper- Industrial Control Systems ating temperature range. Data-Acquisition Systems +Denotes a lead(Pb)-free/RoHS-compliant package. Avionics Robotics Pin Configuration TOP VIEW + AVDD1 1 24 AGND1 CH0 2 23 AGND2 CH1 3 22 AVDD2 CH2 4 21 AGND3 MAX1302 CH3 5 20 REF CH4 6 19 REFCAP CH5 7 18 DVDD CH6 8 17 DVDDO CH7 9 16 DGND CS 10 15 DGNDO DIN 11 14 DOUT SSTRB 12 13 SCLK QSPI is a trademark of Motorola, Inc. MICROWIRE is a registered trademark of National TSSOP Semiconductor Corp. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.8-Channel, V Multirange Inputs, REF Serial 16-Bit ADC ABSOLUTE MAXIMUM RATINGS AVDD1 to AGND1 ....................................................-0.3V to +6V CH0CH7 to AGND1...................................................-6V to +6V AVDD2 to AGND2 ....................................................-0.3V to +6V REF, REFCAP to AGND1 ......................-0.3V to (V + 0.3V) AVDD1 DVDD to DGND........................................................-0.3V to +6V Continuous Current (any pin) ...........................................50mA DVDDO to DGNDO ..................................................-0.3V to +6V Continuous Power Dissipation (Multilayer board, T = +70C) A DVDD to DVDDO......................................................-0.3V to +6V 24-Pin TSSOP (derate 13.9mW/C above +70C).....1111.1mW DVDD, DVDDO to AVDD1........................................-0.3V to +6V Operating Temperature Range ...........................-40C to +85C AVDD1, DVDD, DVDDO to AVDD2 ..........................-0.3V to +6V Junction Temperature .....................................................+150C DGND, DGNDO, AGND3, AGND2 to AGND1 ......-0.3V to +0.3V Storage Temperature Range .............................-65C to +150C CS, SCLK, DIN, DOUT, SSTRB to Lead Temperature (soldering, 10s) .................................+300C DGNDO............................................-0.3V to (V + 0.3V) Soldering Temperature (reflow) .......................................+260C DVDDO 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 = V = V = V = 5V, V = V = V = V = V = 0V, f = 3.5MHz (50% duty AGND1 DGND DGNDO AGND2 AGND3 AVDD1 AVDD2 DVDD DVDDO CLK cycle), external clock mode, V = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input REF range (V ), C = 50pF, C = 50pF, T = -40C to +85C, unless otherwise noted. Typical values are at T = +25C.) REF DOUT SSTRB A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY (Notes 1, 2) Resolution 16 Bits MAX1302A 1.0 2 Integral Nonlinearity INL LSB MAX1302B 1.0 4 Differential Nonlinearity DNL No missing codes -1 +2 LSB Transition Noise External or internal reference 1 LSB RMS Unipolar 0 7.5 Single-ended inputs Bipolar -1.0 7.5 Offset Error mV Differential inputs Bipolar -2.0 10 (Note 3) Channel-to-Channel Gain Unipolar or bipolar 0.025 %FSR Matching Channel-to-Channel Offset Error Unipolar or bipolar 1.0 mV Matching Unipolar 3 Offset Temperature Coefficient Bipolar 1 V/C Fully differential 2 Unipolar 0.5 Gain Error Bipolar 0.8 %FSR Fully differential 1 Unipolar 1.5 Gain Temperature Coefficient ppm/C Bipolar 1.0 DYNAMIC SPECIFICATIONS f = 5kHz, V = FSR - 0.05dB, f = 130ksps (Notes 1, 2) IN(SINE-WAVE) IN SAMPLE Differential inputs, FSR = 2 x V 90 REF Single-ended inputs, FSR = V 88 REF Signal-to-Noise Plus Distortion SINAD dB Single-ended inputs, FSR = V /2 85 REF Single-ended inputs, FSR = V /4 80 82 REF 2 MAX1302