MAX108

19-1492; Rev 0; 9/99 KIT ATION EVALU E L B AVAILA ±5V, 1.5Gsps, 8-Bit ADC with On-Chip 2.2GHz Track/Hold Amplifier General Description Features o 1.5Gsps Conversion Rate o 2.2GHz Full-Power Analog Input Bandwidth o 7.5 Effective Bits at fIN = 750MHz (Nyquist Frequency) o ±0.25LSB INL and DNL o 50Ω Differential Analog Inputs o ±250mV Input Signal Range o On-Chip, +2.5V Precision Bandgap Voltage Reference o Latched, Differential PECL Digital Outputs o Selectable 8:16 Demultiplexer o Internal Demux Reset Input with Reset Output o 192-Contact ESBGA Package o Pin Compatible with MAX104 (1Gsps) and MAX106 (600Msps) MAX108 The MAX108 PECL-compatible, 1.5Gsps, 8-bit analogto-digital converter (ADC) allows accurate digitizing of analog signals with bandwidths to 2.2GHz. Fabricated on Maxim’s proprietary advanced GST-2 bipolar process, the MAX108 integrates a high-performance track/hold (T/H) amplifier and a quantizer on a single monolithic die. The innovative design of the internal T/H, which has an exceptionally wide 2.2GHz full-power input bandwidth, results in high performance (typically 7.5 effective bits) at the Nyquist frequency. A fully differential comparator design and decoding circuitry reduce out-of-sequence code errors (thermometer bubbles or sparkle codes) and provide excellent metastable performance. Unlike other ADCs that can have errors resulting in false fullor zero-scale outputs, the MAX108 limits the error magnitude to 1LSB. The analog input is designed for eith...