ANALOG-TO-DIGITAL CONVERTER. ADS820 Datasheet

ADS820 CONVERTER. Datasheet pdf. Equivalent

ADS820 Datasheet
Recommendation ADS820 Datasheet
Part ADS820
Description 10-Bit/ 20MHz Sampling ANALOG-TO-DIGITAL CONVERTER
Feature ADS820; ® ADS 820 U ADS820 ADS 820 E 10-Bit, 20MHz Sampling ANALOG-TO-DIGITAL CONVERTER TM FEATURES.
Manufacture Burr-Brown Corporation
Datasheet
Download ADS820 Datasheet




Burr-Brown Corporation ADS820
® ADS820U
ADS820E
ADS820
TM 10-Bit, 20MHz Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q NO MISSING CODES
q INTERNAL REFERENCE
q LOW DIFFERENTIAL LINEARITY ERROR:
0.2LSB
q LOW POWER: 195mW
q HIGH SNR: 60dB
q WIDEBAND TRACK/HOLD: 65MHz
q PACKAGES: 28-Pin SOIC and 28-PIN SSOP
APPLICATIONS
q SET-TOP BOXES
q CABLE MODEMS
q VIDEO DIGITIZING
q CCD IMAGING
Camcorders
Copiers
Scanners
Security Cameras
q IF AND BASEBAND DIGITIZATION
DESCRIPTION
The ADS820 is a low power, monolithic 10-bit, 20MHz
analog-to-digital converter utilizing a small geometry
CMOS process. This COMPLETE converter includes
a 10-bit quantizer with internal track/hold, reference,
and a power down feature. It operates from a single
+5V power supply and can be configured to accept
either differential or single-ended input signals.
The ADS820 employs digital error correction to pro-
vide excellent Nyquist differential linearity perfor-
mance for demanding imaging applications. Its low
distortion, high SNR and high oversampling capability
give it the extra margin needed for telecommunications
and video applications.
This high performance converter is specified for AC
and DC performance at a 20MHz sampling rate. The
ADS820 is available in 28-pin SOIC and SSOP
packages.
CLK
Timing
Circuitry
MSBI
OE
IN
IN
REFT
CM
REFB
T/H
+3.25V
Pipeline
A/D
Error
Correction
Logic
3-State
Outputs
10-Bit
Digital
Data
+1.25V
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1995 Burr-Brown Corporation
PDS-1288D
Printed in U.S.A. October, 1996



Burr-Brown Corporation ADS820
SPECIFICATIONS
At TA = +25°C, VS = +5V, Sampling Rate = 20MHz, with a 50% duty cycle clock having a 2ns rise/fall time, unless otherwise noted.
PARAMETER
CONDITIONS
TEMP
ADS820U, E
MIN TYP
MAX
UNITS
Resolution
Specified Temperature Range
ANALOG INPUT
Differential Full Scale Input Range
Common-Mode Voltage
Analog Input Bandwidth (–3dB)
Small Signal
Full Power
Input Impedance
DIGITAL INPUT
Logic Family
Convert Command
ACCURACY(2)
Gain Error
TAMBIENT
–20dBFS(1) Input
0dB Input
Start Conversion
Gain Tempco
Power Supply Rejection of Gain
Input Offset Error
Power Supply Rejection of Offset
CONVERSION CHARACTERISTICS
Sample Rate
Data Latency
DYNAMIC CHARACTERISTICS
Differential Linearity Error
f = 500kHz
Delta +VS = ±5%
Delta +VS = ±5%
f = 10MHz
No Missing Codes
Integral Linearity Error at f = 500kHz
Spurious-Free Dynamic Range (SFDR)
f = 500kHz (–1dBFS input)
f = 10MHz (–1dBFS input)
Two-Tone Intermodulation Distortion (IMD)(3)
f = 4.4MHz and 4.5MHz (referred to –1dBFS envelope)
Signal-to-Noise Ratio (SNR)
f = 500kHz (–1dBFS input)
f = 10MHz (–1dBFS input)
Signal-to-(Noise + Distortion) (SINAD)
f = 500kHz (–1dBFS input)
f = 10MHz (–1dBFS input)
Differential Gain Error
Differential Phase Error
Effective Bits(4)
Aperture Delay Time
Aperture Jitter
Overvoltage Recovery Time(5)
NTSC or PAL
NTSC or PAL
fIN = 3.58MHz
1.5x Full Scale Input
+25°C
+25°C
+25°C
Full
+25°C
Full
+25°C
+25°C
Full
+25°C
Full
Full
Full
+25°C
Full
+25°C
Full
+25°C
Full
+25°C
Full
+25°C
Full
+25°C
Full
+25°C
Full
+25°C
+25°C
+25°C
+25°C
+25°C
10 Guaranteed
–40 +85
+1.25
2.25
120
65
1.25 || 4
+3.25
TTL/HCT Compatible CMOS
Falling Edge
±0.6
±1.5
±1.0
±2.5
±85
0.01
0.1
±2.1
±3.0
0.02
0.1
10k 20M
6.5
Bits
°C
V
V
MHz
MHz
M|| pF
%
%
ppm/°C
%FSR/%
%
%FSR/%
Sample/s
Convert Cycle
±0.15
±0.15
±0.2
±0.2
Guaranteed
±0.5
±1.0
±1.0
±1.0
±1.0
±2.0
LSB
LSB
LSB
LSB
LSB
67 77
64 74
59 63
57 62
dBFS
dBFS
dBFS
dBFS
–61 dBc
–60 dBc
58 60.5
56 60
58 60
56 60
dB
dB
dB
dB
58 60.5
55 60
56 58
54 57
0.5
0.1
9.5
2
7
2
dB
dB
dB
dB
%
degrees
Bits
ns
ps rms
ns
NOTE: (1) dBFS refers to dB below Full Scale. (2) Percentage accuracies are referred to the internal A/D Full Scale Range of 4Vp-p. (3) IMD is referred to the
larger of the two input signals. If referred to the peak envelope signal (0dB), the intermodulation products will be 7dB lower. (4) Based on (SINAD – 1.76)/6.02.
(5) No "rollover" of bits.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
ADS820
2



Burr-Brown Corporation ADS820
SPECIFICATIONS (CONT)
At TA = +25°C, VS = +5V, Sampling Rate = 20MHz, with a 50% duty cycle clock having a 2ns rise/fall time, unless otherwise noted.
PARAMETER
OUTPUTS
Logic Family
Logic Coding
Logic Levels
3-State Enable Time
3-State Disable Time
POWER SUPPLY REQUIREMENTS
Supply Voltage: +VS
Supply Current: +IS
Power Consumption
Thermal Resistance, θJA
28-Pin SOIC
28-Pin SSOP
CONDITIONS
TEMP
Logic Selectable
Logic “LO”, CL = 15pF
Logic “HI”, CL = 15pF
Operating
Operating
Operating
Operating
Operating
Full
Full
Full
Full
+25°C
Full
+25°C
Full
ADS820U, E
MIN TYP
MAX
TTL/HCT Compatible CMOS
SOB or BTC
0 0.4
2.5 +VS
20 40
2 10
+4.75 +5 +5.25
39 47
40 55
195 235
200 275
75
50
UNITS
V
V
V
ns
ns
V
mA
mA
mW
mW
°C/W
°C/W
ABSOLUTE MAXIMUM RATINGS
+VS ....................................................................................................... +6V
Analog Input .............................................................. 0V to (+VS + 300mV)
Logic Input ................................................................ 0V to (+VS + 300mV)
Case Temperature ......................................................................... +100°C
Junction Temperature .................................................................... +150°C
Storage Temperature ..................................................................... +125°C
External Top Reference Voltage (REFT) .................................. +3.4V Max
External Bottom Reference Voltage (REFB) .............................. +1.1V Min
NOTE: Stresses above these ratings may permanently damage the device.
PACKAGE/ORDERING INFORMATION
PRODUCT
PACKAGE
PACKAGE
DRAWING TEMPERATURE
NUMBER(1)
RANGE
ADS820U
ADS820E
28-Pin SOIC
28-Pin SSOP
217 –40°C to +85°C
324 –40°C to +85°C
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with ap-
propriate precautions. Failure to observe proper handling and
installation procedures can cause damage.
Electrostatic discharge can cause damage ranging from
performance degradation to complete device failure. Burr-
Brown Corporation recommends that all integrated circuits be
handled and stored using appropriate ESD protection
methods.
®
3 ADS820







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