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Control Systems
Instrumentation
DAS
Sonar
Digital Radio
GENERAL DESCRIPTION
The XRD66092 is a 12-bit 750 kHz subranging
Analog-to-Digital Converter with an internal track and hold.
The XRD66092 operates with a single supply ranging from +3
V to +5 V while consuming less than 175 mW of power (typical).
Separate pins for V
RT
and V
RB
allow flexibility for analog input
(V
IN
) and the reference voltage range (DV
REF
).
Data is presented at the serial output port every clock cycle
with a 2.5 cycle pipeline delay. LINV and MINV enable binary
and 2鈥檚 complement data formatting. 6 ladder tap pins provide
for transfer function adjustment.
SIMPLIFIED BLOCK DIAGRAM
GND
V
DD
(3 Pads) (3 Pads)
V
RT
REF Ladder
R12
MSB
Comparators
R9
R8
R7
R5
R4
LSB
Comparators
Latch
Latch
Encoder
and
Error
Correction
Logic
Over
OFW
D11
Output
Register
V
DD
GND
LINV MINV
D10-D0
Under
UFW
S/H
V
RB
Clock Logic
PLOAD
SCLK
SDO
V
IN
Aperture CLK
Rev. 1.00
E1996
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538
z
(510) 668-7000
z
FAX (510) 668-7017