ADS807 Datasheet, PDF (1/15 Pages) Texas Instruments – 12-Bit, 53MHz Sampling ANALOG-TO-DIGITAL CONVERTER

®
ADS807E
ADS807
TM 12-Bit, 53MHz Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q SPURIOUS FREE DYNAMIC RANGE:
82dB at 10MHz f_IN
q HIGH SNR: 67.5dB (2Vp-p), 69dB (3Vp-p)
q LOW POWER: 335mW
q INTERNAL OR EXTERNAL REFERENCE
q LOW DNL: 0.5LSB
q FLEXIBLE INPUT RANGE: 2Vp-p to 3Vp-p
q 28-LEAD SSOP PACKAGE
APPLICATIONS
q COMMUNICATIONS IF PROCESSING
q COMMUNICATIONS BASESTATIONS
q TEST EQUIPMENT
q MEDICAL IMAGING
q VIDEO DIGITIZING
q CCD DIGITIZING
ADS807
DESCRIPTION
The ADS807 is a high-speed, high dynamic range,
12-bit pipelined analog-to-digital converter. This con-
verter includes a high-bandwidth track-and-hold that
gives excellent spurious performance up to and beyond
the Nyquist rate. The differential nature of this track-
and-hold and A/D circuitry minimizes even-order har-
monics and gives excellent common-mode noise immu-
nity. The track-and-hold can also be operated single-
ended.
The ADS807 provides for setting the full-scale range
of the converter without any external reference cir-
cuitry. The internal reference can be disabled allowing
low drive, internal references to be used for improved
tracking in multichannel systems.
The ADS807 provides an overrange indicator flag to
indicate an input signal that exceeds the full-scale input
range of the converter. This flag can be used to reduce
the gain of front end gain control circuitry. There is
also an output enable pin to allow for multiplexing and
testability on a PC board.
The ADS807 employs digital error correction tech-
niques to provide excellent differential linearity for
demanding imaging applications.
CLK
Timing
Circuitry
+3V
+2.5V
+2V
+3V
+2.5V
+2V
IN
T/H
IN
(Opt.)
CM
Pipelined
A/D
Error
Correction
Logic
D0
3-State
Outputs
•
•
•
D11
Internal
Reference
Optional External ^{INT/EXT FSSEL OE}
Reference
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©_{1998 Burr-Brown Corporation}
PDS-1396C
Printed in U.S.A. January, 1999