Maxim MAX12557 User Manual

General DescriptionThe MAX12557 is a dual 3.3V, 14-bit analog-to-digitalconverter (ADC) featuring fully differential widebandtrack-and-hold (T/H) inpu

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADC10 ______________________________________________________________________________________6065757080853.0

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADC______________________________________________________________________________________ 116066646272706874

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADC12 ______________________________________________________________________________________PIN NAME FUNCTIO

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADC______________________________________________________________________________________ 13PIN NAME FUNCTIO

MAX12557Detailed DescriptionThe MAX12557 uses a 10-stage, fully differential,pipelined architecture (Figure 1) that allows for high-speed conversion w

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADC______________________________________________________________________________________ 15INBP14-BITPIPELI

MAX12557Analog Inputs and Input Track-and-Hold(T/H) AmplifierFigure 3 displays a simplified functional diagram of theinput T/H circuit. This input T/H

to GND. Bypass REF_P to REF_N with a 10µF capacitor.Bypass REFIN and REFOUT to GND with a 0.1µF capac-itor. The REFIN input impedance is very large (&

MAX12557select either one-half or one-fourth of the clock speed forsampling provides design flexibility, relaxes clockrequirements, and can minimize c

externally isolates it from heavy capacitive loads. Referto the MAX12557 EV kit schematic for recommendationsof how to drive the DAV signal through an

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADC2 _______________________________________________________________________________________ABSOLUTE MAXIMUM

MAX12557The digital outputs D0A/B–D13A/B are high impedancewhen the MAX12557 is in power-down (PD = 1) mode.D0A/B–D13A/B enter this state 10ns after t

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADC______________________________________________________________________________________ 21BINARY-TO-GRAY C

MAX12557Applications InformationUsing Transformer CouplingIn general, the MAX12557 provides better SFDR andTHD with fully differential input signals t

Buffered External Reference DrivesMultiple ADCsThe buffered external reference mode allows for morecontrol over the MAX12557 reference voltage andallo

MAX12557ence, allowing REF_P, REF_N, and COM_ to be drivendirectly by a set of external reference sources.Figure 13 uses a MAX6029 precision 3.000V ba

mount devices for minimum inductance. Bypass VDDtoGND with a 220µF ceramic capacitor in parallel with atleast one 10µF, one 4.7µF, and one 0.1µF ceram

MAX12557Total Harmonic Distortion (THD)THD is the ratio of the RMS sum of the first six harmon-ics of the input signal to the fundamental itself. This

Gain MatchingGain matching is a figure of merit that indicates howwell the gains between the two channels are matchedto each other. The same input sig

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADCMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a M

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADC_______________________________________________________________________________________ 3ELECTRICAL CHARA

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADC4 _______________________________________________________________________________________ELECTRICAL CHARA

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADC_______________________________________________________________________________________ 5ELECTRICAL CHARA

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADC6 _______________________________________________________________________________________ELECTRICAL CHARA

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADC_______________________________________________________________________________________ 7ELECTRICAL CHARA

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADC8 _______________________________________________________________________________________-2.0-1.0-1.50-0.

MAX12557Dual, 65Msps, 14-Bit, IF/Baseband ADC_______________________________________________________________________________________ 920403060507080-5