KAD2708C
8-Bit, 275MSPS Analog-to-Digital Converter
Description
The Kenet
KAD2708C
is the industry’s lowest power,
8-bit, high performance Analog-to-Digital converter.
The converter runs at sampling rates up to 275MSPS,
and is fabricated with Kenet’s proprietary
FemtoCharge®
CMOS technology. Users can now
obtain industry-leading SNR and SFDR specifications
while nearly halving power consumption. Sampling
rates of 210, 170 and 105MSPS are also available in
the same pin-compatible package and in versions
with 10-bit resolution. Kenet’s KAD2708L offers this
performance with LVDS outputs. All are available in
68-pin RoHS-compliant QFN packages with exposed
paddle. Performance is specified over the full
industrial temperature range (-40 to +85°C).
Key Specifications
•
•
•
SNR of 48.8dB at Nyquist
SFDR of 68dBc at Nyquist
Power consumption
≤
265mW at f
S
= 275MSPS
Features
•
•
•
•
•
•
•
•
On-chip reference
Internal track and hold
1.5V
PP
differential input voltage
600MHz analog input bandwidth
Two’s complement or binary output
Over-range indicator
Selectable ÷2 Clock Input
LVCMOS compatible outputs
Resolution, Speed
8 Bits 350MSPS
10 Bits 275MSPS
8 Bits 275MSPS
10 Bits 210MSPS
8 Bits 210MSPS
10 Bits 170MSPS
8 Bits 170MSPS
10 Bits 105MSPS
8 Bits 105MSPS
LVDS Outputs
KAD2708L-35
KAD2710L-27
KAD2708L-27
KAD2710L-21
KAD2708L-21
KAD2710L-17
KAD2708L-17
KAD2710L-10
KAD2708L-10
KAD2710C-27
KAD2708C-27
KAD2710C-21
KAD2708C-21
KAD2710C-17
KAD2708C-17
KAD2710C-10
KAD2708C-10
LVCMOS Outputs
Applications
•
•
•
•
•
•
•
•
•
High-Performance Data Acquisition
Portable Oscilloscope
Medical Imaging
Cable Head Ends
Power-Amplifier Linearization
Radar and Satellite Antenna Array Processing
Broadband Communications
Local Multipoint Distribution System (LMDS)
Communications Test Equipment
Table 1. Pin-Compatible Products
300 Unicorn Park Dr., Woburn, MA 01801
Sales: 1-781-497-0060
FemtoCharge
is a registered trademark of Kenet, Inc.
Rev 1.1
Sales@kenetinc.com
Copyright © 2007, Kenet, Inc.
Page 1 of 17
KAD2708C 8-Bit, 275MSPS Analog-to-Digital Converter
Absolute Maximum Ratings
1
Parameter
AVDD2 to AVSS
AVDD3 to AVSS
OVDD2 to OVSS
Analog Inputs to AVSS
Clock Inputs to AVSS
Logic Inputs to AVSS (VREFSEL, CLKDIV)
Logic Inputs to OVSS (RST, 2SC)
VREF TO AVSS
Analog Output Currents
Logic Output Currents
CMOS Output Currents
Operating Temperature
Storage Temperature
Junction Temperature
-40
-65
Min
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
-0.4
Max
2.1
3.7
2.1
AVDD3 + 0.3
AVDD2 + 0.3
AVDD3 + 0.3
OVDD2 + 0.3
AVDD3 + 0.3
10
10
20
85
150
150
Unit
V
V
V
V
V
V
V
V
mA
mA
mA
°C
°C
°C
1. Exposing the device to levels in excess of the maximum ratings may cause permanent damage. Exposure
to maximum conditions for extended periods may affect device reliability.
Thermal Impedance
Parameter
Junction to Paddle
2
2. Paddle soldered to ground plane.
Symbol
Φ
JP
Typ
30
Unit
°C/W
ESD
Electrostatic charge accumulates on humans, tools and equipment, and may discharge
through any metallic package contacts (pins, balls, exposed paddle, etc.) of an integrated
circuit. Industry-standard protection techniques have been utilized in the design of this prod-
uct. However, reasonable care must be taken in the storage and handling of ESD sensitive
products. Contact Kenet for the specific ESD sensitivity rating of this product.
Rev 1.1
Page 2 of 17
KAD2708C 8-Bit, 275MSPS Analog-to-Digital Converter
Electrical Specifications
All specifications apply under the following conditions unless otherwise noted: AVDD2 = 1.8V, AVDD3 = 3.3V,
OVDD = 1.8V. T
A
= -40
°
C to +85
°
C, Typ values at 25
°
C. f
SAMPLE
= 275MSPS f
IN
= Nyquist.
DC Specifications
Parameter
Power Requirements
1.8V Analog Supply Voltage
3.3V Analog Supply Voltage
1.8V Output Supply Voltage
1.8V Analog Supply Current
3.3V Analog Supply Current
1.8V Output Supply Current
Power Dissipation
AVDD2
AVDD3
OVDD
I
AVDD2
I
AVDD3
I
OVDD
P
D
1.7
3.15
1.7
1.8
3.3
1.8
44
41
26
261
1.9
3.45
1.9
V
V
V
mA
mA
mA
mW
Symbol Conditions
Min
Typ
Max
Units
Rev 1.1
Page 3 of 17
KAD2708C 8-Bit, 275MSPS Analog-to-Digital Converter
Analog Specifications
Parameter
Analog Input
Full-Scale Differential Analog Input Voltage
Gain Temperature Coefficient
Full Power Bandwidth
Clock Input
Sampling Clock Frequency Range
CLKP, CLKN P-P Differential Input Voltage
CLKP, CLKN Differential Input Resistance
CLKP, CLKN Common-Mode Input Voltage
Reference
Internal Reference Voltage
Reference Voltage Temperature Coefficient
Common-Mode Output Voltage
V
REF
V
RTC
V
CM
Full Temp
1.18
1.21
38
0.86
1.24
V
ppm/°C
V
f
SAMPLE
V
CDI
R
CDI
V
CCI
50
0.5
10
0.9
275
1.8
MHz
V
PP
MΩ
V
V
IN
A
VTC
FPBW
Full Temp
1.4
1.5
90
600
1.6
V
PP
ppm/ºC
MHz
Symbol
Conditions
Min
Typ
Max
Units
AC Specifications
Parameter
Signal to Noise Ratio
Signal to Noise and Distortion
Effective Number of Bits
Spurious Free Dynamic Range
Two-Tone SFDR
Integral Nonlinearity
Differential Nonlinearity
Power Supply Rejection Ratio
Word Error Rate
Symbol
SNR
SINAD
ENOB
SFDR
2TSFDR
INL
DNL
PSRR
WER
Conditions
Full Temp
Full Temp
Full Temp
Full Temp
f
1
=133MHz, f
2
=135MHz
-0.8
-0.3
42
Min
45.8
45.7
7.3
63
Typ
48.8
48.7
7.8
68
67
±0.2
±0.2
66
1x10
-12
0.8
0.4
Max
Units
dB
dB
Bits
dBc
dBc
LSB
LSB
dB
Rev 1.1
Page 4 of 17
KAD2708C 8-Bit, 275MSPS Analog-to-Digital Converter
Digital Specifications
Parameter
Inputs
High Input Voltage (VREFSEL)
Low Input Voltage (VREFSEL)
Input Current High (VREFSEL)
Input Current Low (VREFSEL)
High Input Voltage (CLKDIV)
Low Input Voltage (CLKDIV)
Input Current High (CLKDIV)
Input Current Low (CLKDIV)
High Input Voltage (RST,2SC)
Low Input Voltage (RST,2SC)
Input Current High (RST,2SC)
Input Current Low (RST,2SC)
Input Capacitance
CMOS Outputs
Voltage Output High
Voltage Output Low
Output Rise Time
Output Fall Time
V
OH
V
OL
t
R
t
F
1.8
0
1.8
1.4
V
V
ns
ns
VREFSEL V
IH
VREFSEL V
IL
VREFSEL I
IH
VREFSEL I
IL
CLKDIV V
IH
CLKDIV V
IL
CLKDIV I
IH
CLKDIV I
IL
RST,2SC V
IH
RST,2SC V
IL
RST,2SC I
IH
RST,2SC I
IL
C
DI
VIN = OVDD
VIN = OVSS
0
25
1
50
3
VIN = AVDD3
VIN = AVSS
25
0
0.8*OVDD2
0.2*OVDD2
10
75
65
1
VIN = AVDD3
VIN = AVSS
0
25
0.8*AVDD3
0.2*AVDD3
75
10
1
65
0.8*AVDD3
0.2*AVDD3
10
75
V
V
µA
µA
V
V
µA
µA
V
V
µA
µA
pF
Symbol
Conditions
Min
Typ
Max
Units
Rev 1.1
Page 5 of 17
京公网安备 11010802033920号
EEWORLD
