AD9000JD ,High Speed 6-Bit A/D ConverterCHARACTERISTICS unless otherwise noted)Commercial Military08C to +708C –558C to +1258CAD9000JD AD90 ..
AD9002AD ,High Speed 8-Bit Monolithic A/D ConverterGENERAL DESCRIPTIONBIT 2The AD9002 is an 8-bit, high speed, analog-to-digital converter.RThe AD9002 ..
AD9002AJ ,High Speed 8-Bit Monolithic A/D ConverterSpecifications subject to change without notice.–2– REV. DAD90021ABSOLUTE MAXIMUM RATINGS Recommend ..
AD9012AJ ,High Speed 8-Bit TTL A/D ConverterGENERAL DESCRIPTION D2The AD9012 is an 8-bit, ultrahigh speed, analog-to-digitalRD (LSB)converter. ..
AD9012AQ ,High Speed 8-Bit TTL A/D ConverterSpecifications subject to change without notice.1ABSOLUTE MAXIMUM RATINGSVSPositive Supply Voltage ..
AD9012BQ ,High Speed 8-Bit TTL A/D ConverterCHARACTERISTICS (+V = +5.0 V; –V = –5.2 V; Differential Reference Voltage = 2.0 V; unless otherwis ..
ADS5281IRGCT ,Low Power 8-Channel, 12-Bit, 50MSPS ADC with Serialized LVDS Interface 64-VQFN -40 to 85.(2) These devices meet the following planned eco-friendly classification:Green (RoHS and No Sb/Br) ..
ADS5282IRGCR ,Low Power 8-Channel, 12-Bit, 65MSPS ADC with Serialized LVDS Interface 64-VQFN -40 to 85 SBAS397I –DECEMBER 2006–REVISED JUNE 2012(1)RECOMMENDED OPERATING CONDITIONSADS528xPARAMETER MIN T ..
ADS5400IPZP ,12-bit, 1000 MSPS ADC with analog input buffer 100-HTQFP -40 to 85Features 3 DescriptionThe ADS5400 device is a 12-bit, 1-GSPS analog-to-1• 1-GSPS Sample Ratedigital ..
ADS5400IPZPR ,12-bit, 1000 MSPS ADC with analog input buffer 100-HTQFP -40 to 85FEATURES list. 1• Deleted text "Internal pull-down resistor" from the SCLK, SDIO, and SDO pins in t ..
ADS5410IPFB ,12-Bit, 80 MSPS ADC, Single Ch., Lowest Power, High BW, Excellent PerformanceFEATURES APPLICATIONS 80-MSPS Maximum Sample Rate Cellular Base Transceiver Station ReceiveChann ..
ADS5411IPGP ,11bit 105MSPS Analog-to-Digital Converter 52-HTQFP -40 to 85ELECTRICAL CHARACTERISTICS Over full temperature range (T = −40°C to T = 85°C), sampling rate = 105 ..
AD9000JD
High Speed 6-Bit A/D Converter
REV.A
High Speed
6-Bit A/D Converter
FUNCTIONAL BLOCK DIAGRAMFEATURESMSPS Encode Rate
Bipolar Input Range
Low Error Rate
Overflow Bit
MIL-STD-883 Compliant Versions Available
APPLICATIONS
QAM Telecommunications
Electronic Warfare (ECM, ECCM, ESM)
Radar Guidance Digitizers
GENERAL DESCRIPTIONThe AD9000 is a 6-bit, high speed, analog-to-digital converter
with ECL compatible outputs and a bipolar input stage. The
AD9000 is fabricated in a high performance bipolar process that
allows encode rates up to 77MSPS.
The AD9000 employs the standard flash converter architecture
based on 64 individual comparators which simultaneously
determine the precise analog signal level. The comparators are
followed by two stages of decoding logic, allowing the AD9000
to operate with a very low error rate. The low 35pF input
capacitance of the AD9000 greatly simplifies the analog driver
stage. An overflow output bit is also incorporated into the
AD9000 design as is a hysteresis control pin to modify compara-
tor sensitivity.
The AD9000 is offered as both a commercial temperature range
device, 0°C to +70°C, and as an extended temperature range
device, –55°C to +125°C. Both versions are available packaged
in a 16-pin ceramic DIP. The extended temperature range
device is also available in a 28-pin ceramic LCC package. The
extended temperature range versions are offered as fully compli-
ant MIL-STD-883 Class B devices.
AD9000–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
(Supply Voltages = –5.2V and +5.0V; Differential Reference Voltage = 2.0V
unless otherwise noted)
ELECTRICAL CHARACTERISTICSPOWER SUPPLY
AD9000
(Continued)NOTESAIN = +VREF.Determined by 3 dB reduction in reconstructed output at 75 MSPS.Under normal operating conditions, the analog input voltages should not
exceed nominal ±2 V operating range, nor the supply voltages (+VS and –VS),
whichever is smaller.Under normal operating conditions the differential reference voltage may
range from ±0.5 V to ±2 V; +VREF ≥ –VREF.Output terminated with 100Ω resistors to –2.0V.Measured from the leading edge of ENCODE to data out on Bit 1 (MSB).Measured from the trailing edge of ENCODE to data out on Bit 1 (MSB).For full-scale step input, 6-bit accuracy is attained in specified time.
9Recovers to 6-bit accuracy in specified time, after 150% full-scale input
overvoltage.
10Measured on Bit 1 (MSB) only.
11Measured at 50 MSPS encode rate.
12Analog input frequency = 15 MHz.
13RMS signal to RMS noise, with 540 kHz analog input signal.
14Peak-to-peak signal to rms noise, with 540 kHz analog input signal.
15f1 = 9.3 MHz, f2 = 7.6 MHz; Encode = 42 MHz.
16DC to 8.2 MHz noise bandwidth with 3.886 MHz slot.
17Supply voltage should remain stable within ±5% for normal operation.
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS1Positive Supply Voltage . . . . . . . . . . . . . . . . . . . 0.3V to +6V
Negative Supply Voltage . . . . . . . . . . . . . . . . . 6.0V to +0.3V
Analog-to-Digital Ground Voltage Differential . . . . . . . . . 0.5
Analog Input Voltages (AIN, +VREF, –VREF)2 . . . . . . . . . . +3 V
Differential Reference Voltage (+VREF to –VREF)3 . . . . . . . 6 V
ENCODE Input Voltage . . . . . . . . . . . . . . . . . . . . – VS to 0 V
HYSTERESIS Control Voltage . . . . . . . . . . . . 0 V to + 3.0 V
Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Power Dissipation (+25°C Free Air)4 . . . . . . . . . . . . 745 mW
Operating Temperature Range
AD9000JD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
AD9000SD/SE . . . . . . . . . . . . . . . . . . . . . . –55°C to +125°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . +175°C
Lead Soldering Temperature (10 sec) . . . . . . . . . . . . +300°C
NOTESAbsolute maximum ratings are limiting values, to be applied individually, and
beyond which serviceability of the circuit may be impaired. Functional oper-
ability under any of these conditions is not necessarily implied. Exposure to
absolute maximum rating conditions for extended periods may affect device
reliability.Under normal operating conditions, the analog input voltages should not
exceed nominal +2V operating range, nor the supply voltages (+VS and –VS),
whichever is smaller.Under normal operating conditions the differential reference voltage may range
from ±0.5V to ±2V; +VREF ≥ –VREF.Typical thermal impedances . . .
16-Pin CeramicθJA = 67°C/W; θJC = 7°C/W
28-Pin LCCθJA = 62°C/W; θJC = 14°C/W
AD9000
CAUTIONESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
DIE LAYOUT
MECHANICAL INFORMATIONDie Dimensions . . . . . . . . . . . . . . . . 129 × 217 × 15 (±2) mils
Pad Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 × 4 mils
Metalization . . . . . . . . . . . . . . . . . . . . . . . 10,000Å Aluminum
Backing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . None
Substrate Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –VS
Passivation . . . . . . . . . . . . . . . . . . . . . . . . 10,000Å Oxynitride
Die Attach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gold Eutectic
Bond Wire . . . . . . . . 1.25 mil Aluminum; Ultrasonic Bonding
or 1 mil Gold; Gold Ball Bonding
ORDERING GUIDE1NOTESMIL-STD-883 versions available, contact factory.D = Ceramic DIP; E = Leadless Ceramic Chip Carrier.
PIN DESIGNATIONS
PIN DESCRIPTIONS
Figure 1. Functional Block Diagram
Figure 2.System Timing Diagram
Figure 3.Burn-ln Test Circuit
AD9000
ABOUT THE AD9000
Analog BandwidthQuantifying the high frequency analog performance of the
AD9000 is somewhat difficult because of the various criteria
that can be applied. At one extreme there is the analog input
bandwidth of a single input comparator (which tends to be
extremely high). At the other end of the performance criteria is
the “no missing codes” restriction, which tends to be the most
conservative measure of analog bandwidth.
The “no missing codes” criteria simply means that the converter
is capable of generating all 64 output codes for an analog and
ENCODE frequency. At higher ENCODE rates to analog
frequencies, the converter continues to function, but with
reduced resolution. The graph below details the “no missing
codes” region of operation for the AD9000 at several reference
levels. Note that nearly all analog-to-digital converter applica-
tions operate in the oversampled region to avoid generation of
indeterminate data (aliasing).
Figure 4.Analog Input vs. Encode Rate “No Missing
Codes”
High-Speed Performance EnhancementsThe AD9000 employs a hysteresis control pin which affects
comparator sensitivity. The error rate (number of full-scale
errors in a given period) is directly affected by the comparator
sensitivity. By varying the voltage on the hysteresis control pin,
the error rate can be reduced. The AD9000 is capable of ex-
tremely low error rate operation, which makes it ideal for error
sensitive applications such as QAM demodulation. If the
hysteresis control pin is used, it should be decoupled to
ground through a 0.1μF capacitor, otherwise it may be left
floating.
At the highest encode rates, overall accuracy can be improved
by skewing the ENCODE signal duty-cycle to allow more time
in the “latch” mode. Specifically, extending the logic HIGH
portion of the ENCODE signal allows the comparators more
time to achieve an appropriate logic level prior to the decoding
Figure 5.Comparator Switching vs. Hysteresis Voltage
Layout ConsiderationsThe AD9000, like all high-speed circuits, requires certain
precautions be taken to ensure optimum performance. The
foremost of these is the use of a substantial low impedance
ground plane around and under the AD9000. Just as important
are high quality ground connections to the AD9000 itself. It is
probably more effective to keep the analog and digital grounds
separate, except at the AD9000 where they should be connected
together. Sockets should generally be avoided due to the in-
creased interlead capacitance they induce. If socketing must be
used, pin sockets are preferred.
Decoupling is especially important to high-speed analog circuits.
Each supply should be decoupled to ground with 0.1μF ceramic
and 0.001μF mica capacitors. The ladder reference pins should
be treated in a similar manner. In addition to decoupling the
reference ladder, the reference ladder should be driven from a
low output impedance source for the best noise rejection. In
all cases where practical, chip capacitors are recommended to
reduce the effects of lead inductance associated with standard
discrete capacitors.
MIL-STD-883 Compliance InformationThe AD9000SE/SD/883C are classified within microcircuits
group 57-technology group D (bipolar A/D converters), and are
constructed in accordance with the latest revision of MIL-STD-
883. The AD9000 is electrostatic sensitive and falls within
electrostatic sensitivity classification Category A. PDA (Percent
Defective Allowance) is computed based on Subgroups 1 of the
specified Group A test list. QA screening is in accordance with
“Alternate Method A” of method 5005. The following apply:
Burn-In per 1015, Life Test per 1005, Electrical Testing per
5004. (Note: Group A electrical Testing assumes TA = TC = TJ.)
