MAX1072/MAX1075 19-3153 Rev 1 4/09 1.8Msps, Single-Supply, Low-Power, True-Differential, 10-Bit ADCs General Description Features The MAX1072/MAX1075 low-power, high-speed, serial- 1.8Msps Sampling Rate output, 10-bit, analog-to-digital converters (ADCs) oper- ate at up to 1.8Msps. These devices feature true-differen- Only 45mW (typ) Power Dissipation tial inputs, offering better noise immunity, distortion Only 1A (max) Shutdown Current improvements, and a wider dynamic range over single- ended inputs. A standard SPI/QSPI/MICROWIRE High-Speed, SPI-Compatible, 3-Wire Serial Interface interface provides the clock necessary for conversion. These devices easily interface with standard digital signal 61dB S/(N + D) at 525kHz Input Frequency processor (DSP) synchronous serial interfaces. Internal True-Differential Track/Hold (T/H) The MAX1072/MAX1075 operate from a single +4.75V to +5.25V supply voltage and require an external reference. External Reference The MAX1072 has a unipolar analog input, while the No Pipeline Delays MAX1075 has a bipolar analog input. These devices fea- ture a partial power-down mode and a full power-down Small 12-Pin TQFN Package mode for use between conversions, which lower the sup- ply current to 1mA (typ) and 1A (max), respectively. Also featured is a separate power-supply input (V ), which L allows direct interfacing to +1.8V to V digital logic. The DD fast conversion speed, low-power dissipation, excellent AC performance, and DC accuracy (0.5 LSB INL) make the MAX1072/MAX1075 ideal for industrial process con- trol, motor control, and base-station applications. The MAX1072/MAX1075 come in a 12-pin TQFN pack- age, and are available in the extended (-40C to +85C) Ordering Information temperature range. PIN- Applications PART TEMP RANGE INPUT PACKAGE Data Acquisition MAX1072ETC+T -40C to +85C 12 TQFN Unipolar Bill Validation MAX1075ETC+T -40C to +85C 12 TQFN Bipolar Motor Control +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. Communications Portable Instruments Typical Operating Circuit Pin Configuration TOP VIEW AIN+ N.C. SCLK +1.8V TO V DD +4.75V TO +5.25V 12 11 10 0.01F 10F 0.01F 10F AIN- 1 9 CNVST V V DD L DIFFERENTIAL REF 2 8 DOUT + AIN+ DOUT MAX1072 INPUT - AIN- MAX1075 VOLTAGE C/DSP RGND 3 7 V L MAX1072 CNVST MAX1075 SCLK 45 6 REF REF V N.C. GND DD 4.7F 0.01F RGND GND TQFN SPI/QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National 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.1.8Msps, Single-Supply, Low-Power, True-Differential, 10-Bit ADCs ABSOLUTE MAXIMUM RATINGS V to GND..............................................................-0.3V to +6V Maximum Current into Any Pin............................................50mA DD V to GND ...................-0.3V to the lower of (V + 0.3V) or +6V Continuous Power Dissipation (T = +70C) L DD A Digital Inputs 12-Pin TQFN (derate 16.9mW/C above +70C) ......1349mW to GND ....................-0.3V to the lower of (V + 0.3V) or +6V Operating Temperature Range DD Digital Output MAX107 ETC.................................................-40C to +85C to GND.......................-0.3V to the lower of (V + 0.3V) or +6V Junction Temperature......................................................+150C L Analog Inputs and Storage Temperature Range .............................-60C to +150C REF to GND.............-0.3V to the lower of (V + 0.3V) or +6V Lead Temperature (soldering, 10s) .................................+300C DD RGND to GND .......................................................-0.3V to +0.3V 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 = V , V = 4.096V, f = 28.8MHz, 50% duty cycle, T = -40C to +85C, unless otherwise noted. Typical DD L DD REF SCLK A values are at T = +25C.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY Resolution 10 Bits Relative Accuracy INL (Note 1) 0.5 LSB Differential Nonlinearity DNL (Note 2) 0.5 LSB Offset Error 2 LSB Offset-Error Temperature 1 ppm/C Coefficient Gain Error Offset nulled 2 LSB Gain Temperature Coefficient 2 ppm/C DYNAMIC SPECIFICATIONS (f = 525kHz sine wave, V = V , unless otherwise noted.) IN IN REF SINAD 60 61 dB Signal-to-Noise Plus Distortion Total Harmonic Distortion THD -80 -74 dB Spurious-Free Dynamic Range SFDR -80 -74 dB Intermodulation Distortion IMD f = 250kHz, f = 300kHz -78 dB IN1 IN2 Full-Power Bandwidth -3dB point, small-signal method 20 MHz Full-Linear Bandwidth S/(N + D) > 56dB, single ended 2 MHz CONVERSION RATE Minimum Conversion Time t (Note 3) 0.556 s CONV Maximum Throughput Rate 1.8 Msps Minimum Throughput Rate (Note 4) 10 ksps Track-and-Hold Acquisition Time t (Note 5) 104 ns ACQ Aperture Delay 5 ns Aperture Jitter (Note 6) 30 ps External Clock Frequency f 28.8 MHz SCLK 2 MAX1072/MAX1075