MAX1426 19-1598 Rev 1 7/11 10-Bit, 10Msps ADC General Description Features The MAX1426 10-bit, monolithic analog-to-digital con- Differential Inputs for High Common-Mode verter (ADC) is capable of a 10Msps sampling rate. This Noise Rejection device features an internal track-and-hold (T/H) amplifier 61dB Signal-to-Noise Ratio (at f = 2MHz) IN for excellent dynamic performance at the same time, it minimizes the number of external components. Low Internal +2.5V Reference input capacitance of only 8pF minimizes input drive 150MHz Input Bandwidth requirements. A wide input bandwidth (up to 150MHz) makes this device suitable for digital RF/IF downconvert- Wide 2V Input Range er applications employing undersampling techniques. Low Power Consumption: 156mW The MAX1426 employs a differential pipelined architec- Separate Digital Supply Input for 3V Logic ture with a wideband T/H amplifier to maximize through- Compatibility put while limiting power consumption to only 156mW. The MAX1426 generates an internal +2.5V reference Single +5V Operation Possible that supplies three additional reference voltages (+3.25V, +2.25V, and +1.25V). These reference volt- Ordering Information ages provide a differential input range of +2V to -2V. The analog inputs are biased internally to correct the PART TEMP. RANGE PIN-PACKAGE DC level, eliminating the need for external biasing on MAX1426CAI+ 0C to +70C 28 SSOP AC-coupled applications. MAX1426EAI+ -40C to +85C 28 SSOP A separate +3V digital logic supply input allows for +Denotes a lead(Pb)-free/RoHS-compliant package. separation of digital and analog circuitry. The output Devices are also available in a tape-and-reel package. data is in twos complement format. The MAX1426 is Specify tape and reel by adding T to the number when order- available in the space-saving 28-pin SSOP package. ing. For a pin-compatible version at a higher data rate, refer to the MAX1424 or MAX1425 Applications Pin Configuration Medical Ultrasound Imaging CCD Pixel Processing TOP VIEW + IR Focal Plane Array AGND 1 28 D0 Radar AV 2 27 D1 DD IF and Baseband Digitization REFP 3 26 D2 Set-Top Boxes REFIN 4 25 D3 Functional Diagram REFN 5 24 D4 MAX1426 CML 6 23 DGND AGND 7 22 DV DD AV CLK DD MAX1426 AV 8 21 DGND DD AGND INTERFACE INP 9 20 DV DD INP OUTPUT INN 10 19 D5 D9D0 T/H PIPELINE ADC DRIVERS INN CMLP 11 18 D6 DV DD CMLN 12 17 D7 REF SYSTEM + REF DGND BIAS CLK 13 16 D8 OE/PD 14 15 D9 REFIN REFP CML REFN OE/PD SSOP 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.10-Bit, 10Msps ADC ABSOLUTE MAXIMUM RATINGS AV to AGND ........................................................ -0.3V to +6V Operating Temperature Ranges DD DV to DGND ....................................................... -0.3V to +6V MAX1426CAI ..................................................... 0C to +70C DD AV to DGND........................................................ -0.3V to +6V MAX1426EAI................................................... -40C to +85C DD DGND to AGND................................................................. 0.3V Maximum Junction Temperature .................................... +150C REFP, REFIN, REFN, CMLN, CMLP, Storage Temperature Range ............................-65C to +150C CML, INP, INN .....................(V - 0.3V) to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C AGND AV DD Soldering Temperature (reflow) .......................................+260C CLK, OE/PD, D0D9...............(V - 0.3V) to (V + 0.3V) DGND DV DD Continuous Power Dissipation (T = +70C) A 28-Pin SSOP (derated 9.5mW/C above +70C) .........762mW 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 = +5V, V = +3.3V, V = V = V = 0V, internal reference, digital output loading 35pF, f = AV CMLP DV CMLN AGND DGND CLK DD DD 10MHz (50% duty cycle), T = T to T , unless otherwise noted. Typical values are at T = +25C.) A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ACCURACY 10 Resolution RES Bits Differential Nonlinearity DNL -1 1 LSB Integral Nonlinearity INL -1.5 0.3 1.5 LSB No Missing Codes Guaranteed monotonic Midscale Offset MSO (Note 1) -3 1.0 3 %FSR Internal reference (Note 1) -10 5 10 External reference (REFIN) (Note 2) -5 2 5 Gain Error GE %FSR External reference (REFP, CML, REFN) -5 3 5 (Note 3) Power-Supply Rejection Ratio PSRR (Note 4) -5 2 +5 mV/V DYNAMIC PERFORMANCE (A = -1.0dBFS) IN Signal-to-Noise Ratio SNR f = 2MHz 60 61 dB Spurious-Free Dynamic Range SFDR f = 2MHz 69 72 dB Total Harmonic Distortion THD f = 2MHz -70 -67 dB (first five harmonics) Signal-to-Noise and Distortion SINAD f = 2MHz 58 60 dB 2 MAX1426