XRD6406 Datasheet, PDF (1/12 Pages) Exar Corporation – CMOS 6 MSPS, 10-Bit, High Speed Analog-to-Digital Converter

FEATURES
· 10-Bit Resolution
· Sampling Rate to 6 MSPS
· DNL = +1 LSB, INL = +2 LSB
· Internal S/H Function
· Single 5V Power Supply
· V_IN DC Range: 0V to V_DD
· V_REF DC Range: 1V to V_DD
· Low Power: 65mW
· Three-State Digital Outputs
· Latch-Up Free
· Pin Compatible With: MP8784
XRD6406
CMOS
6 MSPS, 10-Bit, High Speed
Analog-to-Digital Converter
APPLICATIONS
· Digital Color Copiers
· Precision CCDs and Scanners
· Digital Radio
June 1998-2
BENEFITS
· Simplified Analog Design
· Rugged
· Few External Components, no S/H Needed
· Reduced Board Space
GENERAL DESCRIPTION
The XRD6406 is a 10-bit, 6 MSPS, Analog-to-Digital
Converter for applications that require high speed and
high accuracy. Designed using an advanced CMOS
process, this part offers excellent performance, low
power consumption and latch-up free operation.
The XRD6406 uses a subranging architecture to maintain
low power consumption at high conversion rates. Our
proprietary comparator design achieves a low analog
input capacitance. The input circuitry of the XRD6406
includes an on-chip S/H function that allows this part to
digitize analog input signals between AGND and AV_DD.
The designer can choose the internally generated
reference voltages, or provide external reference
voltages to the V_RB and V_RT pins. The internal reference
generates 1.0V at V_RB and 4V at V_RT. Providing external
reference voltages allows easy interface to any input
signal range between GND and V_DD. This also allows the
system to cancel zero scale and full scale errors. The
Reference Ladder taps (R1 to R3) can be used to
externally trim any INL errors.
This device operates from a single 5V supply. Power
consumption from a 5V supply is typically 65mW at
F_S=6MHz.
SIMPLIFIED BLOCK DIAGRAM
V_RTS
V_RT
3
R1-R3
V_DD
V_RB
V_RBS
MSB
Comparators
Latch
LSB
Comparators
Latch
S/H
Clock
Logic
AV_DD AGND
Encoder
F/F
DB9 (MSB)
DB0 (LSB)
V_IN
CLK
OE
DV_DD DGND
Rev. 1.00
E1998
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z [phone] z [phone]