SPT7864
10-BIT, 40 MSPS A/D CONVERTER
TECHNICAL DATA
NOVEMBER 20, 2001
FEATURES
• 40 MSPS maximum sample rate
• 9.5 effective number of bits at ƒ
IN
= 10 MHz and
ƒ
S
= 40 MSPS
• 2V
P-P
full-scale input range
• Differential input 2.5 V common mode
• Internal or external voltage reference
• Common-mode voltage reference output
• +3 V / +5 V digital output logic compatibility
• +5 V analog power supply
• Sleep mode power dissipation: 55 mW
APPLICATIONS
• Video imaging
• Medical imaging
• Radar receivers
• IR imaging
• Digital communications
GENERAL DESCRIPTION
The SPT7864 is a 10-bit, 40 MSPS analog-to-digital con-
verter with low power dissipation at only 395 mW typical at
40 MSPS with a power supply of +5.0 V. The digital outputs
are +3 V or +5 V, and are user selectable. The SPT7864
has incorporated proprietary circuit design and CMOS
processing technologies to achieve its advanced perfor-
mance. Inputs and outputs are TTL/CMOS compatible to
interface with TTL/CMOS logic systems. Output data for-
mat is offset binary.
The SPT7864 is available in a 28-lead SSOP package
over the commercial temperature range.
BLOCK DIAGRAM
V
DD
GND
Sleep
V
CM
Bandgap
Reference
EXT/INT
REF
H
REF
L
V
IN
V
IN
Bias
Cell
THA
10-BIT
40 MSPS
ADC
2
CLK, CLK
10
Data
Output
Latches
& Buffers
1
10
OR
D0D9
GND
OV
DD
CADEKA [ CADEKA MICROCIRCUITS LLC. ]
