MAX100 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – 250Msps, 8-Bit ADC with Track/Hold

19-0282; Rev 0; 7/94
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250Msps, 8-Bit ADC with Track/Hold
_______________General Description ____________________________Features
The MAX100 ECL-compatible, 250Msps, 8-bit analog-to-
digital converter (ADC) allows accurate digitizing of ana-
log signals from DC to 125MHz (Nyquist frequency).
Designed with Maxim’s proprietary advanced bipolar
processes, the MAX100 contains a high-performance
track/hold (T/H) amplifier and a quantizer in a single
ceramic strip-line package.
The innovative design of the internal T/H assures an
exceptionally wide input bandwidth of 1.2GHz and aper-
ture delay uncertainty of less than 2ps, resulting in a high
6.8 effective bits performance. Special comparator output
design and decoding circuitry reduce out-of-sequence
code errors. The probability of erroneous codes occurring
due to metastable states is reduced to less than 1 error
per 10¹⁵ clock cycles. Unlike other ADCs, which can
have errors that result in false full-scale or zero-scale out-
puts, the MAX100 keeps the magnitude to less than 1LSB.
o 250Msps Conversion Rate
o 6.8 Effective Bits at 125MHz
o Less than ±1/2LSB INL
o 50Ω Differential or Single-Ended Inputs
o ±270mV Input Signal Range
o Reference Sense Inputs
o Ratiometric Reference Inputs
o Configurable Dual-Output Data Paths
o Latched, ECL-Compatible Outputs
o Low Error Rate, Less than 10^-15 Metastable States
o Selectable On-Chip 8:16 Demultiplexer
o 84-Pin Ceramic Flat Pack
________________________Applications
The analog input is designed for either differential or single-
ended use with a ±270mV range. Sense pins for the refer-
ence input allow full-scale calibration of the input range or
facilitate ratiometric use. Midpoint tap for the reference
string is available for applications that need to modify the
output coding for a user-defined bilinear response. Use of
separate high-current and low-current ground pins pro-
vides better noise immunity and highest device accuracy.
High-Speed Digital Instrumentation
High-Speed Signal Processing
Medical Systems
Radar/Sonar
High-Energy Physics
Communications
Dual output data paths provide several data output modes ______________Ordering Information
for easy interfacing. These modes can be configured as
either one or two identical latched ECL outputs. An 8:16
demultiplexer mode that reduces the output data rates to
one-half the clock rate is also available.
PART TEMP. RANGE
PIN-PACKAGE
MAX100CFR* 0°C to +70°C 84 Ceramic Flat Pack (with heatsink)
For applications that require faster data rates, refer to
*Contact factory for 84-Pin Ceramic Flat Pack without heatsink.
Maxim’s MAX101, which allows conversion rates up to
5_{_}00_{_}M_{__}sp_{_}s_{_}._{___________________________________________________Functional Diagram}
VART VARTS
AIN+
AIN-
TRACK/
HOLD
CLK
CLK
VACT VA_CTS
FLASH CONVERTER
VARBS VARB
L
A
T
C
88
H
E
S
8
B
U
MODE
F
CONTROL
F
E
R
L
A
T
C
MOD DIV A=B
H
E
S
AData
(A0–A7)
DCLK
DCLK
BData
(B0–B7)
________________________________________________________________ Maxim Integrated Products 1
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