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AD9054AADN/a129avai8-Bit, 200 MSPS/135 MSPS A/D Converter


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AD9054A
8-Bit, 200 MSPS/135 MSPS A/D Converter
REV.D
8-Bit, 200 MSPS/D Converter
FUNCTIONAL BLOCK DIAGRAM
FEATURES
200 MSPS Guaranteed Conversion Rate
135 MSPS Low Cost Version Available
350 MHz Analog Bandwidth
1 V p-p Analog Input Range
Internal 2.5 V Reference and T/H
Low Power: 500 mW
5 V Single Supply Operation
TTL Output Interface
Single or Demultiplexed Output Ports
APPLICATIONS
RGB Graphics Processing
High Resolution Video
Digital Data Storage Read Channels
Digital Communications
Digital Instrumentation
Medical Imaging
GENERAL DESCRIPTION

The AD9054A is an 8-bit monolithic analog-to-digital converter
optimized for high speed, low power, small size and ease of use.
With a 200 MSPS encode rate capability and full-power analog
bandwidth of 350 MHz, the component is ideal for applications
requiring the highest possible dynamic performance.
To minimize system cost and power dissipation, the AD9054A
includes an internal 2.5 V reference and track-and-hold circuit.
The user provides only a 5 V power supply and an encode clock.
No external reference or driver components are required for
many applications.
The AD9054A’s encode input interfaces directly to TTL, CMOS
or positive-ECL logic and will operate with single-ended or
differential inputs. The user may select dual-channel or single-
channel digital outputs. The dual (demultiplexed) mode inter-
leaves ADC data through two 8-bit channels at one-half the
clock rate. Operation in demultiplexed mode reduces the speed
and cost of external digital interfaces while allowing the ADC to
be clocked to the full 200 MSPS conversion rate. In the single-
channel (nondemultiplexed) mode, all data is piped at the full
clock rate to the Channel A outputs.
Fabricated with an advanced BiCMOS process, the AD9054A is
provided in a space-saving 44-lead LQFP surface mount plastic
package (ST-44) and specified over the full industrial (–40°C to
+85°C) temperature range.
AD9054A–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS(VDD = 5 V, external reference, fS = max unless otherwise noted.)
AD9054A
NOTESGain error and gain temperature coefficient are based on the ADC only (with a fixed 2.5 V external reference).3 dB bandwidth with full-power input signal.tV and tPD are measured from the threshold crossing of the ENCODE input to valid TTL levels of the digital outputs. The output ac load during test is 5 pF (Refer to
equivalent circuits Figures 5 and 6).IIH and IIL are valid for differential input voltages of less than 1.5 V. At higher differential voltages, the input current will increase to a maximum of 1.5 mA.Power dissipation is measured under the following conditions: analog input is –1 dBFS at 19.7 MHz.Typical thermal impedance for the ST-44 (LQFP) 44-lead package (in still air): θJC = 20°C/W, θCA = 35°C/W, θJA = 55°C/W.A change in input offset voltage with respect to a change in VDD.SNR/harmonics based on an analog input voltage of –1.0 dBFS referenced to a 1.024 V full-scale input range.
Specifications subject to change without notice.
EXPLANATION OF TEST LEVELS
Test Level
100% production tested.
II.100% production tested at 25°C and sample tested at speci-
IV.Parameter is guaranteed by design and characterization testing.Parameter is a typical value only.
VI.100% production tested at 25°C; guaranteed by design and
AD9054A
CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD9054A features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
ABSOLUTE MAXIMUM RATINGS*

VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . VDD to 0.0 V
Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . VDD to 0.0 V
VREF IN, VREF OUT . . . . . . . . . . . . . . . . . . . VDD to 0.0 V
Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Operating Temperature . . . . . . . . . . . . . . . . –55°C to +125°C
Storage Temperature . . . . . . . . . . . . . . . . . . –65°C to +150°C
Maximum Junction Temperature . . . . . . . . . . . . . . . . 150°C
Maximum Case Temperature . . . . . . . . . . . . . . . . . . . 150°C
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions outside of those indicated in the operation
sections of this specification is not implied. Exposure to absolute maximum ratings
for extended periods may affect device reliability.
ORDERING GUIDE

*ST = Plastic Thin Quad Flatpack (LQFP).
Table I.Output Coding
PIN FUNCTION DESCRIPTIONS
PIN CONFIGURATION
AD9054A
Figure 2a.Timing—Dual Channel Mode (One-Shot Data Sync)
Figure 2b.Timing—Dual Channel Mode (Continuous Data Sync)
EQUIVALENT CIRCUITS
Figure 3.Equivalent Analog Input Circuit
Figure 4.Equivalent Reference Input Circuit
Figure 5.Equivalent ENCODE and Data Select Input Circuit
Figure 6.Equivalent DEMUX Input Circuit
Figure 7.Equivalent Digital Output Circuit
Figure 8.Equivalent Reference Output Circuit
TPC 1.SNR vs. fIN:fS = 200 MSPS
TPC 2.SNR vs. fS: fIN = 19.7 MHz
TPC 3.SNR vs. fS:fIN = 70.1 MHz
AD9054A–Typical Performance Characteristics

TPC 4.SNR vs. Temperature, fS = 135 MSPS
TPC 5.SNR vs. Temperature, fS = 200 MSPS
TPC 6.SNR vs. Clock Pulsewidth, (tPWH):fS = 135 MSPS
TPC 7.SNR vs. Clock Pulsewidth, (tPWH): fS = 200 MSPS
TPC 8.SINAD vs. Temperature:fS = 135 MSPS
TPC 9.SINAD vs. Temperature:fS = 200 MSPS
TPC 10.Harmonic Distortion vs. fS:fIN = 19.7 MHz
TPC 11.Harmonic Distortion vs. fS:fIN = 70.1 MHz
TPC 12.2nd Harmonic vs. Temperature:fS = 135 MSPS
AD9054A
TPC 13.2nd Harmonic vs. Temperature: fS = 200 MSPS
TPC 14.3rd Harmonic vs. Temperature: fS = 135 MSPS
TPC 15.3rd Harmonic vs. Temperature: fS = 200 MSPS
TPC 16.Frequency Response: fS = 200 MSPS
TPC 17.Spectrum: fS = 200 MSPS, fIN = 19.7 MHz
TPC 18.Spectrum: fS = 200 MSPS, fIN = 70.1 MHz
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