Rainbow Electronics MAX100 - Manual

_______________General Description
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 10
15 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.
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.
Dual output data paths provide several data output modes
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.
For applications that require faster data rates, refer to
Maxim’s MAX101, which allows conversion rates up to
500Msps.
____________________________Features
♦ 250Msps Conversion Rate
♦ 6.8 Effective Bits at 125MHz
♦ Less than ±1/2LSB INL
♦ 50
Ω
Differential or Single-Ended Inputs
♦ ±270mV Input Signal Range
♦ Reference Sense Inputs
♦ Ratiometric Reference Inputs
♦ Configurable Dual-Output Data Paths
♦ Latched, ECL-Compatible Outputs
♦ Low Error Rate, Less than 10 -15 Metastable States
♦ Selectable On-Chip 8:16 Demultiplexer
♦ 84-Pin Ceramic Flat Pack
________________________Applications
High-Speed Digital Instrumentation
High-Speed Signal Processing
Medical Systems
Radar/Sonar
High-Energy Physics
Communications
______________Ordering Information
MAX100
________________________________________________________________ Maxim Integrated Products 1
DCLK
DCLK
A=B DIV MOD
BData
(B0–B7)
AData
(A0–A7) AIN+
AIN-
CLK
CLK
VA RT VA RTS VA RB VA RBS
VA CT VA CTS L
A
T
C
H
E
S
B
U
F
F
E
R
L
A
T
C
H
E
S
MODE
CONTROL
TRACK/
HOLD
FLASH CONVERTER
8 8
8
_________________________________________________________Functional Diagram
Call toll free 1-800-998-8800 for free literature.
PART
MAX100CFR* 0°C to +70°C
TEMP. RANGE PIN-PACKAGE
84 Ceramic Flat Pack (with heatsink)
19-0282; Rev 0; 7/94
EVALUATION KIT
AVAILABLE
*Contact factory for 84-Pin Ceramic Flat Pack without heatsink.
250Msps, 8-Bit ADC with Track/Hold