The MAX101 ECL-compatible, 500Msps, 8-bit analogto-digital converter (ADC) allows accurate digitizing of
analog signals from DC to 250MHz (Nyquist frequency). Dual monolithic converters, driven by the track/hold
(T/H), operate on opposite clock edges (time interleaved). Designed with Maxim’s proprietary advanced
bipolar processes, the MAX101 contains a high-performance T/H amplifier and two quantizers in an 84-pin
ceramic flat pack.
The innovative design of the internal T/H assures an
exceptionally wide 1.2GHz input bandwidth and aperture delay uncertainty of less than 2ps, resulting in a
high 7.0 effective bits at the Nyquist frequency. Special
comparator output design and decoding circuitry
reduce out-of-sequence code errors. The probability of
erroneous codes due to metastable states is reduced to
less than 1 error per 1015clock cycles. And, unlike
other ADCs that can have errors resulting in false fullscale or zero-scale outputs, the MAX101 keeps the error
magnitude to less than 1LSB.
The analog input is designed for either differential or
single-ended use with a ±270mV range. Sense pins for
the reference input allow full-scale calibration of the
____________________________Features
♦ 500Msps Conversion Rate
♦ 7.0 Effective Bits Typical at 250MHz
♦ 1.2GHz Analog Input Bandwidth
♦ Less than ±1/2LSB INL
♦ 50Ω Differential or Single-Ended Inputs
♦ ±270mV Input Signal Range
♦ Ratiometric Reference Inputs
♦ Dual Latched Output Data Paths
-15
♦ Low Error Rate, Less than 10
Metastable States
♦ 84-Pin Ceramic Flat Pack
________________________Applications
High-Speed Digital Instrumentation
High-Speed Signal Processing
Medical Systems
Radar/Signal Processing
High-Energy Physics
Communications
input range or facilitate ratiometric use.
Phase adjustment is available to adjust the relative
sampling of the converter halves for optimizing converter performance. Input clock phasing is also available
for interleaving several MAX101s for higher effective
sampling rates.
______________Ordering Information
PART
MAX101CFR* 0°C to +70°C
*Contact factory for 84-pin ceramic flat pack without heatsink.
Analog Input Voltage.............................................................±2V
Reference Voltage (VA
Reference Voltage (VA
MAX101
Clock Input Voltage (V
, VBRT)...........................-0.3V to +1.5V
RT
, VBRB)..........................-1.5V to +0.3V
RB
, VIL).....................................-2.3V to 0V
IH
Note 1: The digital control inputs are diode protected. However, limited protection is provided on other pins. Permanent damage
may occur on unconnected units under high-energy electrostatic fields. Keep unused units in supplied conductive carrier or
shunt the terminals together.
Note 2: Typical thermal resistance, junction-to-case R
=12°C/W, if 200 lineal ft/min airflow is provided. See
R
θJA
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
= 5°C/W and thermal resistance, junction to ambient (MAX101CFR)
Clock Pulse Width Low
Clock Pulse Width High
CLK to DCLK
Propagation Delay
MAX101
DCLK to A/BData
Propagation Delay
Rise Time
Fall Time
Pipeline Delay
(Latency)
Note 3: All devices are 100% production tested at +25°C and are guaranteed by design for T
Note 4: Deviation from best-fit straight line. See
Note 5: See the
Signal-to-Noise Ratio and Effective Bits
Note 6: SNR calculated from effective bits performance using the following equation: SNR(dB) = 1.76 + 6.02 x effective bits.
Note 7: Clock pulse width minimum requirements t
Note 8: Outputs terminated through 100Ω to -2.0V.