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12-Bit ADC Samples Up to 250Msps

SUNNYVALE, CA -Maxim Integrated Products sets a new 12-bit sampling-speed standard with the introduction of the MAX1215, a 12-bit 250Msps analog-to-digital converter (ADC). At 250Msps, this new ADC has the world's fastest sample rate at the 12-bit level, and delivers outstanding dynamic performance over input frequencies as high as 300MHz. The MAX1215 is ideal for designers who need to implement higher order power-amplifier predistortion, because the 250Msps update rate allows them to sample wider bandwidths with greater dynamic range than could have been sampled before. The device also consumes 34% less power than the closest competitor, whose sampling rate is only 210Msps.

The MAX1215 achieves a spurious-free dynamic range (SFDR) of 74dBc. It has an excellent signal-to-noise ratio (SNR) of 66dB at 10MHz which remains flat (within 2dB) for input tones up to 300MHz. Such excellent dynamic performance makes this device suitable for wideband applications like cable-head end receivers and power-amplifier predistortion in cellular base stations.

This high-speed, 12-bit ADC runs on a single 1.8V supply. The analog input is designed for either differential or single-ended operation and can be AC or DC coupled. The selectable on-chip, divide-by-2 clock circuit reduces the phase noise of the input clock source. The digital outputs are LVDS compatible, and the data format can be selected as either two's complement or offset binary.

The MAX1215 completes a family of pin-compatible 8-, 10-, and 12-bit parts that can sample up to 250Msps, as shown in the table below. Like the rest of the family, the MAX1215 is in production and available in a space-saving, 68-pin TQFN-EP package specified for the industrial temperature range (-40°C to +85°C). An evaluation kit is available to shorten design time. Pricing starts at $47.50 (1000-up, FOB USA).

Part Resolution (Bits) Speed(Msps) SNR (dB)
fIN = 180MHz, -1dB
MAX1121 8 250 48.8
MAX1122 10 170 57.1
MAX1123 10 210 57.0
MAX1124 10 250 56.3
MAX1213 12 170 65.1
MAX1214 12 210 65.7
MAX1215 12 250 65.8

Jueves, 30 Junio, 2005 - 07:44
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