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Maxim Integrated Semiconductor Electronic Components Datasheet


MAX101A

500Msps / 8-Bit ADC with Track/Hold



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MAX101A pdf
19-1109; Rev 0; 7/96
EVALUAATVIOANILKAIBTLMEANUAL
500Msps, 8-Bit ADC with Track/Hold
_______________General Description
The MAX101A ECL-compatible, 500Msps, 8-bit analog-
to-digital converter (ADC) allows accurate digitizing of
analog signals from DC to 250MHz (Nyquist frequen-
cy). Dual monolithic converters, driven by the track/hold
(T/H), operate on opposite clock edges (time inter-
leaved). Designed with Maxim’s proprietary advanced
bipolar processes, the MAX101A contains a high-per-
formance T/H amplifier and two quantizers in an 84-pin
ceramic flat pack.
The innovative design of the internal T/H ensures an
exceptionally wide 1.2GHz input bandwidth and aper-
ture 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 1015 clock cycles. And, unlike other
ADCs that can have errors resulting in false full-scale or
zero-scale outputs, the MAX101A keeps the error mag-
nitude to less than 1LSB.
The analog input is designed for either differential or
single-ended use with a ±250mV range. Sense pins for
the reference input allow full-scale calibration of the
input range or facilitate ratiometric use.
Phase adjustment is available to adjust the relative
sampling of the converter halves for optimizing convert-
er performance. Input clock phasing is also available
for interleaving several MAX101As for higher effective
sampling rates.
____________________________Features
o 500Msps Conversion Rate
o 7.0 Effective Bits Typical at 250MHz
o 1.2GHz Analog Input Bandwidth
o Less than ±1/2LSB INL
o 50Differential or Single-Ended Inputs
o ±250mV Input Signal Range
o Ratiometric Reference Inputs
o Dual Latched Output Data Paths
o Low Error Rate, Less than 10-15 Metastable States
o 84-Pin Ceramic Flat Pack
________________________Applications
High-Speed Digital Instrumentation
High-Speed Signal Processing
Medical Systems
Radar/Signal Processing
High-Energy Physics
Communications
______________Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX101ACFR*
0°C to +70°C
84 Ceramic Flat Pack
(with heatsink)
*Contact factory for 84-pin ceramic flat pack without heatsink.
_________________________________________________________Functional Diagram
MAX101A
AIN+
AIN-
TRACK
AND
HOLD
CLK
CLK
VART VARTS
STROBE
TRK1 TRK1 PHADJ VBRT VBRTS
FLASH CONVERTER
(8 -BIT)
FLASH CONVERTER
(8 -BIT)
VARBS VARB
8
STROBE
8
VBRBS VBRB
L
A
T
C
H
E
S
8
ADATA
B
U
F
DCLK
F
E DCLK
R
L8
A BDATA
T
C
H
E
S
________________________________________________________________ Maxim Integrated Products 1
For the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800



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MAX101A pdf
500Msps, 8-Bit ADC with Track/Hold
ABSOLUTE MAXIMUM RATINGS
Supply Voltages (Note 1)
VCC ...........................................................................0V to +7V
VEE .............................................................................-7V to 0V
VCC - VEE .........................................................................+12V
Analog Input Voltage .............................................................±2V
Reference Voltage (VART, VBRT)...........................-0.3V to +1.5V
Reference Voltage (VARB, VBRB) ..........................-1.5V to +0.3V
Clock Input Voltage (VIH, VIL) .....................................-2.3V to 0V
DIV10 Input Voltage (VIH, VIL).......................................VEE to 0V
Output Current, (IOUT(max))
TJ <100°C .......................................................................14mA
100°C < TJ <120°C.........................................................12mA
Operating Temperature Range...............................0°C to +70°C
Operating Junction Temperature (Note 2)............0°C to +120°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+250°C
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 RθJC = 5°C/W and thermal resistance, junction to ambient (MAX101ACFR)
RθJA =12°C/W, if 200 lineal ft/min airflow is provided. See Package Information.
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.
ELECTRICAL CHARACTERISTICS
(VEE = -5.2V, VCC = +5V, RL = 100to -2V, VART, VBRT = 0.95V, VARB, VBRB = -0.95V, TA = +25°C, unless otherwise noted.
TMIN to TMAX = 0°C to +70°C.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
ACCURACY
Resolution
Integral Nonlinearity (Note 4)
Differential Nonlinearity
DYNAMIC SPECIFICATIONS
Effective Bits
Signal-to-Noise Ratio
Maximum Conversion Rate
Analog Input Bandwidth
Aperture Width
Aperture Delay
Aperture Jitter
ANALOG INPUT
Input Voltage Range
Input Offset Voltage
Least Significant Bit Size
Input Resistance
Input Resistance
Temperature Coefficient
INL
DNL
AData, BData
AData, BData,
no missing codes
TA = +25°C
TA = TMIN to TMAX
TA = +25°C
TA = TMIN to TMAX
ENOB
SNR
fCLK
BW3dB
tAW
tAD
tAJ
fCLK = 500MHz,
VIN = 95% full scale
(Note 5)
fAIN = 10MHz
fAIN = 125MHz
fAIN = 250MHz
fAIN = 125MHz, fCLK = 500MHz,
VIN = 95% full scale (Note 6)
(Note 7)
Figure 4
Figure 4
Figure 4
VIN
AIN+ to AIN-, Table 2, Full scale
TA = TMIN to TMAX
Zero scale
VIO AIN+, AIN-, TA = TMIN to TMAX
LSB TA = TMIN to TMAX
RI AIN+, AIN-, to GND
8 Bits
±0.50
±0.75
LSB
±0.75
±0.85
LSB
7.6
7.1
6.7 7.0
44.5
500
1.2
270
1
2
Bits
dB
Msps
GHz
ps
ns
ps
205
-290
-23
1.65
49
0.008
290
-205
23
2.35
51
mV
mV
mV
/°C
2 _______________________________________________________________________________________



Part Number MAX101A
Description 500Msps / 8-Bit ADC with Track/Hold
Maker Maxim - Maxim
Total Page 16 Pages
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