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ADS803E

Part # ADS803E
Description A/D CONV 12-BIT 5MHZ 28 LEADSSOP
Category IC
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Burr-Brown Corporation
Date Code: 0043
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

12-Bit, 5MHz Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
HIGH SFDR: 82dB at NYQUIST
HIGH SNR: 69dB
LOW POWER: 115mW
LOW DLE: 0.25LSB
FLEXIBLE INPUT RANGE
OVER-RANGE INDICATOR
APPLICATIONS
IF AND BASEBAND DIGITIZATION
CCD IMAGING SCANNERS
TEST INSTRUMENTATION
DESCRIPTION
The ADS803 is a high-speed, high dynamic range, 12-bit
pipelined Analog-to-Digital (A/D) converter. This converter
includes a high-bandwidth track-and-hold that gives excel-
lent spurious performance up to and beyond the Nyquist rate.
This high-bandwidth, linear track-and-hold minimizes har-
monics and has low jitter, leading to excellent SNR perfor-
mance. The ADS803 is also pin-compatible with the 10MHz
ADS804 and the 20MHz ADS805.
The ADS803 provides an internal reference and can be
programmed for a 2Vp-p input range for the best spurious
performance and ease of driving. Alternatively, the 5Vp-p input
range can be used for the lowest input referred noise of
0.09LSBs rms giving superior imaging performance. There is
also a capability to set the input range in between the 2Vp-p
and 5Vp-p input ranges or to use an external reference. The
ADS803 also provides an over-range indicator flag to indicate
an input range that exceeds the full-scale input range of the
converter. This flag can be used to reduce the gain of the front-
end gain-ranging circuitry.
The ADS803 employs digital error-correction techniques to
provide excellent differential linearity for demanding imaging
applications. Its low distortion and high SNR give the extra
margin needed for communications, medical imaging, video,
and test instrumentation applications. The ADS803 is avail-
able in an SSOP-28 package.
12-Bit
Pipelined
ADC
Reference and
Mode Select
Reference Ladder
and Driver
Timing Circuitry
Error
Correction
Logic
3-State
Outputs
T & H
D0
D11
CLK
+V
S
ADS803
VDRV
OE
SEL REFBV
REF
REFT
INV
IN
IN
CM
OVR
ADS803
SBAS074B – JANUARY 1997 – REVISED SEPTEMBER 2002
www.ti.com
Copyright © 1997, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
A
D
S
8
0
3
E
ADS803
2
SBAS074B
www.ti.com
+V
S
....................................................................................................... +6V
Analog Input ........................................................... (–0.3V) to (+V
S
+0.3V)
Logic Input ............................................................. (–0.3V) to (+V
S
+0.3V)
Case Temperature ......................................................................... +100°C
Junction Temperature .................................................................... +150°C
Storage Temperature ..................................................................... +150°C
ABSOLUTE MAXIMUM RATINGS
(1)
ELECTRICAL CHARACTERISTICS
At T
A
= full specified temperature range, V
S
= +5V, specified input range = 1.5V to 3.5V, single-ended input and sampling rate = 5MHz, unless otherwise specified.
ADS803E
PARAMETER CONDITIONS MIN TYP MAX UNITS
RESOLUTION 12 Tested Bits
SPECIFIED TEMPERATURE RANGE –40 +85 °C
CONVERSION CHARACTERISTICS
Sample Rate 10k 5M Samples/s
Data Latency 6 Clk Cycles
ANALOG INPUT
Single-Ended Input Range 1.5 3.5 V
Standard Optional Single-Ended Input Range 0 5 V
Common-Mode Voltage 2.5 V
Standard Optional Common-Mode Voltage 1V
Input Capacitance 20 pF
Track-Mode Input Bandwidth –3dBFS Input 270 MHz
DYNAMIC CHARACTERISTICS
Differential Linearity Error (Largest Code Error)
f = 500kHz ±0.25 ±0.75 LSB
No Missing Codes Tested
Spurious-Free Dynamic Range
(1)
f = 2.48MHz (–1dB input) 74 82 dBFS
(2)
2-Tone Intermodulation Distortion
(3)
74 dBc
f = 1.8M and 1.9M (–7dBFS each tone)
Signal-to-Noise Ratio (SNR)
f = 2.48MHz (–1dB input) 66.5 69 dB
Signal-to-(Noise + Distortion) (SINAD)
f = 2.48MHz (–1dB input) 65 68 dB
Effective Number of Bits at 2.48MHz
(4)
11 Bits
Input Referred Noise 0V to 5V Input 0.09 LSBs rms
1.5V to 3.5V Input 0.23 LSBs rms
Integral Nonlinearity Error
f = 500kHz ±1 ±2 LSB
Aperture Delay Time 1ns
Aperture Jitter 4 ps rms
Over-Voltage Recovery Time 1.5 • FS Input 2 ns
Full-Scale Step Acquisition Time 50 ns
SPECIFIED
PACKAGE TEMPERATURE PACKAGE ORDERING TRANSPORT
PRODUCT PACKAGE-LEAD DESIGNATOR
(1)
RANGE MARKING NUMBER MEDIA, QUANTITY
ADS803E SSOP-28 DB –40°C to +85°C ADS803E ADS803E Rails, 48
" """"ADS803E/1K Tape and Reel, 1000
NOTE: (1) For the most current specifications and package information, refer to our web site at www.ti.com.
PACKAGE/ORDERING INFORMATION
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instru-
ments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degrada-
tion to complete device failure. Precision integrated circuits
may be more susceptible to damage because very small
parametric changes could cause the device not to meet its
published specifications.
NOTE: (1) Stresses above those listed under “Absolute Maximum Ratings”
may cause permanent damage to the device. Exposure to absolute maximum
conditions for extended periods may affect device reliability.
ADS803
3
SBAS074B
www.ti.com
ELECTRICAL CHARACTERISTICS (Cont.)
At T
A
= full specified temperature range, V
S
= +5V, specified input range = 1.5V to 3.5V, single-ended input and sampling rate = 5MHz, unless otherwise specified.
ADS803E
PARAMETER CONDITIONS MIN TYP MAX UNITS
DIGITAL INPUTS
Logic Family CMOS Compatible
Convert Command Start Conversion Rising Edge of Convert Clock
High Level Input Current (V
IN
= 5V)
(5)
100 µA
Low Level Input Current (V
IN
= 0V) ±10 µA
High Level Input Voltage +3.5 V
Low Level Input Voltage +1.0 V
Input Capacitance 5pF
DIGITAL OUTPUTS
Logic Family CMOS/TTL Compatible V
Logic Coding Straight Offset Binary
Low Output Voltage (I
OL
= 50µA) 0.1 V
Low Output Voltage (I
OL
= 1.6mA) 0.4 V
High Output Voltage (I
OH
= 50µA) +4.5 V
High Output Voltage (I
OH
= 0.5mA) +2.4 V
3-State Enable Time
OE
= L 20 40 ns
3-State Disable Time
OE
= H 2 10 ns
Output Capacitance 5pF
ACCURACY (5Vp-p Input Range) f
S
= 2.5MHz
Zero Error (Referred to FS) At 25°C 0.2 ±1.5 %FS
Zero Error Drift (Referred to FS) ±5 ppm/°C
Gain Error
(6)
At 25°C ±2.0 %FS
Gain Error Drift
(6)
±15 ppm/°C
Gain Error
(7)
At 25°C ±1.5
%FS
Gain Error Drift
(7)
±15 ppm/°C
Power-Supply Rejection of Gain V
S
= ±5% 60 82 dB
Reference Input Resistance 1.6 k
Internal Voltage Reference Tolerance (V
REF
= 2.5V)
At 25°C ±35 mV
Internal Voltage Reference Tolerance (V
REF
= 1.0V)
At 25°C ±14 mV
POWER-SUPPLY REQUIREMENTS
Supply Voltage: +V
S
Operating +4.7 +5.0 5.3 V
Supply Current: +I
S
Operating 23 27 mA
Power Dissipation Operating 115 135 mW
Thermal Resistance,
θ
JA
SSOP-28 50 °C/W
NOTES: (1) Spurious-Free Dynamic Range refers to the magnitude of the largest harmonic. (2) dBFS means dB relative to full-scale. (3) 2-tone intermodulation
distortion is referred to the largest fundamental tone. This number will be 6dB higher if it is referred to the magnitude of the 2-tone fundamental envelope. (4) Effective
number of bits (ENOB) is defined by (SINAD 1.76)/6.02. (5) Internal 50k pull-down resistor. (6) Includes internal reference. (7) Excludes internal reference.
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