AN642
AN642 is Analog-to-Digital Converter Captures 1Gsps manufactured by Maxim Integrated.
features
, such as trench isolation, that are incorporated in Maxim's lower performance GST-1 process.
Figure 1. This simplified block diagram shows how the MAX104 integrates a high-bandwidth T/H amplifier with a high-speed quantizer. Although many of the outstanding performance parameters of the MAX104 are possible with the integrated-circuit process (such as a transition frequency of 27GHz for NPN transistors, a three-metal interconnect system, small geometry, and precision laser-trimmed nickel-chrome (Ni Cr) thin-film
.maxim-ic./an642 Page 1 of 7 resistors), additional credit goes to the MAX104's design team for creating an efficient and effective ADC architecture. Most high-speed ADCs that sample more than several hundred megahertz have input bandwidths that are limited to no more than their maximum sampling frequency to improve noise performance. One example is the signal-to-noise ratio (SNR). This limited input bandwidth may rule out use in applications where bandwidths of interest in the input spectrum are higher, and an undersampling approach is needed. Also, if the input signal is changing rapidly during conversion, the effective number of bits (ENOB) and SNR will be reduced. The MAX104's on-chip 2.2GHz full-power-bandwidth T/H amplifier (Figure 2) increases dynamic performance significantly and supports more precise capture of fast analog data at extremely high conversion rates.
Figure 2. The MAX104's full-power...
