MAX1127 19-3144 Rev 2 9/05 Quad, 12-Bit, 65Msps, 1.8V ADC with Serial LVDS Outputs General Description Features The MAX1127 quad, 12-bit analog-to-digital converter Four ADC Channels with Serial LVDS/SLVS (ADC) features fully differential inputs, a pipelined Outputs architecture, and digital error correction. This ADC is Excellent Dynamic Performance optimized for low-power, high-dynamic performance for 69.6dB SNR at f = 19.3MHz IN medical imaging, communications, and instrumentation 92dBc SFDR at f = 19.3MHz IN applications. The MAX1127 operates from a 1.7V to -87dB Channel Isolation 1.9V single supply and consumes only 563mW while Ultra-Low Power delivering a 69.6dB signal-to-noise ratio (SNR) at a 135mW per Channel (Normal Operation) 19.3MHz input frequency. In addition to low operating 1.2mW Total (Shutdown Mode) power, the MAX1127 features a 675A power-down mode for idle periods. Accepts 20% to 80% Clock Duty Cycle An internal 1.24V precision bandgap reference sets the Self-Aligning Data-Clock to Data-Output Interface ADCs full-scale range. A flexible reference structure Fully Differential Analog Inputs allows the use of an external reference for applications Wide 1.4V Differential Input Voltage Range P-P requiring increased accuracy or a different input volt- age range. Internal/External Reference Option A single-ended clock controls the conversion process. Test Mode for Digital Signal Integrity An internal duty-cycle equalizer allows for wide varia- LVDS Outputs Support Up to 30in FR-4 Backplane tions in input-clock duty cycle. An on-chip phase- Connections locked loop (PLL) generates the high-speed serial Small, 68-Pin QFN with Exposed Paddle low-voltage differential signaling (LVDS) clock. Evaluation Kit Available (MAX1127EVKIT) The MAX1127 provides serial LVDS outputs for data, clock, and frame alignment signals. The output data is Ordering Information presented in twos complement or binary format. PART TEMP RANGE PIN-PACKAGE Refer to the MAX1126 data sheet for a pin-compatible 68 QFN 10mm x 40Msps version of the MAX1127. MAX1127EGK -40C to +85C x 10mm x 0.9mm The MAX1127 is available in a small, 10mm x 10mm x 0.9mm, 68-pin QFN package with exposed paddle and Pin Configuration is specified for the extended industrial (-40C to +85C) temperature range. 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 GND 1 51 OUT0P Applications EP IN0P 2 50 OUT0N Ultrasound and Medical Imaging IN0N 3 49 OV DD GND 4 48 OUT1P Positron Emission Tomography (PET) Imaging IN1P 5 47 OUT1N IN1N 6 46 OV Multichannel Communication Systems DD GND 7 45 CLKOUTP Instrumentation AV 8 CLKOUTN DD 44 MAX1127 AVDD 9 OV 43 DD AVDD 10 FRAMEP 42 GND 11 41 FRAMEN IN2P 12 40 OV DD IN2N 13 39 OUT2P GND 14 38 OUT2N IN3P 15 37 OV DD IN3N 16 36 OUT3P GND 17 35 OUT3N 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 QFN 10mm x 10mm x 0.9mm Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. GND AV DD REFADJ CMOUT REFIO AV DD GND CV DD LVDSTEST GND T/B CLK AVDD GND AVDD AVDD AVDD AV DD AVDD AV DD AV DT DD PDALL SLVS/LVDS PD3 PLL0 PD2 PLL1 PD1 PLL2 PD0 PLL3 OV OV DD DDQuad, 12-Bit, 65Msps, 1.8V ADC with Serial LVDS Outputs ABSOLUTE MAXIMUM RATINGS AV to GND.........................................................-0.3V to +2.0V T/B, LVDSTEST to GND ...........................-0.3V to (AV + 0.3V) DD DD CV to GND ........................................................-0.3V to +3.6V DD REFIO, REFADJ, CMOUT to GND ...........-0.3V to (AV + 0.3V) DD OV to GND ........................................................-0.3V to +2.0V I.C. to GND...............................................-0.3V to (AV + 0.3V) DD DD IN P, IN N to GND...................................-0.3V to (AV + 0.3V) Continuous Power Dissipation (T = +70C) DD A CLK to GND.............................................-0.3V to (CV + 0.3V) DD 68-Pin QFN 10mm x 10mm x 0.9mm OUT P, OUT N, FRAME , (derated 41.7mW/C above +70C)........................3333.3mW CLKOUT to GND................................-0.3V to (OV + 0.3V) DD Operating Temperature Range ...........................-40C to +85C DT, SLVS/LVDS to GND...........................-0.3V to (AV + 0.3V) Maximum Junction Temperature .....................................+150C DD PLL0, PLL1, PLL2, PLL3 to GND .............-0.3V to (AV + 0.3V) Storage Temperature Range .............................-65C to +150C DD PD0, PD1, PD2, PD3, PDALL to GND......-0.3V to (AV + 0.3V) DD Lead Temperature Range (soldering, 10s)......................+300C 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 (AV = 1.8V, OV = 1.8V, CV = 1.8V, GND = 0, external V = 1.24V, REFADJ = AV , C to GND = 0.1F, DD DD DD REFIO DD REFIO f = 65MHz (50% duty cycle), DT = 0, T = T to T , unless otherwise noted. Typical values are at T = +25C.) (Note 1) CLK A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY Resolution N 12 Bits Integral Nonlinearity INL (Note 2) 0.4 LSB Differential Nonlinearity DNL (Note 2) 0.25 LSB Offset Error Fixed external reference (Note 2) 1 % FS Gain Error % FS Fixed external reference (Note 2) 1.5 ANALOG INPUTS (IN P, IN N) Input Differential Range V Differential input 1.4 V ID P-P Common-Mode Voltage Range V (Note 3) 0.76 V CMO Differential Input Impedance R Switched capacitor load 2 k IN Differential Input Capacitance C 12.5 pF IN CONVERSION RATE Maximum Conversion Rate f 65 MHz SMAX Minimum Conversion Rate f 4 MHz SMIN Data Latency 6.5 Cycles DYNAMIC CHARACTERISTICS (differential inputs, 4096-point FFT) f = 5.3MHz at -0.5dBFS 69.7 IN Signal-to-Noise Ratio (Note 2) SNR f = 19.3MHz at -0.5dBFS, T +25C 66.6 69.6 dB IN A f = 30.3MHz at -0.5dBFS 69.4 IN f = 5.3MHz at -0.5dBFS 69.6 IN Signal-to-Noise and Distortion SINAD f = 19.3MHz at -0.5dBFS, T +25C 66.5 69.5 dB IN A (First Four Harmonics) (Note 2) f = 30.3MHz at -0.5dBFS 69.3 IN f = 5.3MHz at -0.5dBFS 11.4 IN Effective Number of Bits (Note 2) ENOB f = 19.3MHz at -0.5dBFS, T +25C 11.4 Bits IN A f = 30.3MHz at -0.5dBFS 11.3 IN 2 MAX1127