The MAX108 PECL-compatible, 1.5Gsps, 8-bit ultra high-speed analog-to-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 ultra high-speed ADCs that can have errors resulting in false full- or zero-scale outputs, the MAX108 limits the error magnitude to 1LSB.
The analog input is designed for either differential or single-ended use with a ±250mV input voltage range. Dual, differential, positive-referenced emitter-coupled logic (PECL)-compatible output data paths ensure easy interfacing and include an 8:16 demultiplexer feature that reduces output data rates to one-half the sampling clock rate. The PECL outputs can be operated from any supply between +3V to +5V for compatibility with +3.3V or +5V referenced systems. Control inputs are provided for interleaving additional MAX108 devices to increase the effective system sampling rate.
The MAX108 is packaged in a 25mm x 25mm, 192-contact Enhanced Super Ball-Grid Array (ESBGA™) and is specified over the commercial (0°C to +70°C) temperature range. For pin-compatible, lower speed versions of the MAX108, see the MAX104 (1Gsps) and the MAX106 (600Msps) data sheets.
Key Features
Applications/Uses
1.5Gsps Conversion Rate
2.2GHz Full-Power Analog Input Bandwidth
7.5 Effective Bits at fIN = 750MHz (Nyquist Frequency)
±0.25LSB INL and DNL
50Ω Differential Analog Inputs
±250mV Input Signal Range
On-Chip, +2.5V Precision Bandgap Voltage Reference
Latched, Differential PECL Digital Outputs
Selectable 8:16 Demultiplexer
Internal Demux Reset Input with Reset Output
192-Contact ESBGA Package
Pin Compatible with MAX104 (1Gsps) and MAX106 (600Msps)
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices:
1-3
of
3
MAX108
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
MAX108CHC-TD
Land Pattern: Not Available
0°C to +70°C
See data sheet
MAX108C/D
Land Pattern: Not Available
See data sheet
MAX108CHC-D
SBGA;192 pin;630 mm²
Outline Drawing: 21-0073 (PDF)
Land Pattern: 90-0163 (PDF)
Use pkgcode/variation: H192-3*
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