Ac electrical characteristics, Note 3), Note 4) – Rainbow Electronics ADC12L063 User Manual
Page 7: Note 5), Note 6), Dc and logic electrical characteristics
DC and Logic Electrical Characteristics
(Continued)
Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, V
A
= V
D
= V
DR
= +3.3V, PD
= 0V, V
REF
= +1.0V, f
CLK
= 62 MHz, t
r
= t
f
= 2 ns, C
L
= 20 pF/pin. Boldface limits apply for T
A
= T
J
= T
MIN
to T
MAX
: all
other limits T
A
= T
J
Symbol
Parameter
Conditions
Typical
Limits
Units
(Limits)
SFDR
Spurious Free Dynamic Range
f
IN
= 1 MHz, Differential V
IN
=
−0.5 dBFS
82
dB
f
IN
= 10 MHz, Differential V
IN
=
−0.5 dBFS
78
dB(min)
IMD
Intermodulation Distortion
f
IN
= 9.5 MHz and 10.5 MHz,
each = −7 dBFS
−75
dBFS
AC Electrical Characteristics
Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, V
A
= V
D
, V
DR
= +3.3V, PD
= 0V, V
REF
= +1.0V, f
CLK
= 62 MHz, t
r
= t
f
= 2 ns, C
L
= 20 pF/pin. Boldface limits apply for T
A
= T
J
= T
MIN
to T
MAX
: all
other limits T
A
= T
J
Symbol
Parameter
Conditions
Typical
Limits
Units
(Limits)
f
CLK1
Maximum Clock Frequency
70
62
MHz(min)
f
CLK2
Minimum Clock Frequency
1
MHz
Recommended Clock Duty Cycle
50
40
%(min)
60
%(max)
t
CH
Clock High Time
6.5
ns(min)
t
CL
Clock Low Time
6.5
ns(min)
t
CONV
Conversion Latency
6
Clock
Cycles
t
OD
Data Output Delay after Rising
CLK Edge
V
DR
= 2.5V
12
ns
V
DR
= 3.3V
9
13
ns(max)
t
AD
Aperture Delay
2
ns
t
AJ
Aperture Jitter
1.2
ps rms
t
DIS
Data outputs into TRI-STATE
Mode
10
ns
t
EN
Data Outputs Active after
TRI-STATE
10
ns
t
PD
Power Down Mode Exit Cycle
20
t
CLK
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed
specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test
conditions.
Note 2: All voltages are measured with respect to GND = AGND = DGND = 0V, unless otherwise specified.
Note 3: When the input voltage at any pin exceeds the power supplies (that is, V
IN
<
AGND, or V
IN
>
V
A
, V
D
or V
DR
), the current at that pin should be limited to
25 mA. The 50 mA maximum package input current rating limits the number of pins that can safely exceed the power supplies with an input current of 25 mA to two.
Note 4: The absolute maximum junction temperature (T
J
max) for this device is 150˚C. The maximum allowable power dissipation is dictated by T
J
max, the
junction-to-ambient thermal resistance (
θ
JA
), and the ambient temperature, (T
A
), and can be calculated using the formula P
D
MAX = (T
J
max - T
A
)/
θ
JA
. In the 32-pin
LQFP,
θ
JA
is 79˚C/W, so P
D
MAX = 1,582 mW at 25˚C and 823 mW at the maximum operating ambient temperature of 85˚C. Note that the power consumption of
this device under normal operation will typically be about 374 mW (354 typical power consumption + 20 mW TTL output loading). The values for maximum power
dissipation listed above will be reached only when the device is operated in a severe fault condition (e.g. when input or output pins are driven beyond the power
supply voltages, or the power supply polarity is reversed). Obviously, such conditions should always be avoided.
Note 5: Human body model is 100 pF capacitor discharged through a 1.5 k
Ω resistor. Machine model is 220 pF discharged through 0Ω.
Note 6: The 235˚C reflow temperature refers to infrared reflow. For Vapor Phase Reflow (VPR), the following Conditions apply: Maintain the temperature at the top
of the package body above 183˚C for a minimum 60 seconds. The temperature measured on the package body must not exceed 220˚C. Only one excursion above
183˚C is allowed per reflow cycle.
Note 7: The inputs are protected as shown below. Input voltages above V
A
or below GND will not damage this device, provided current is limited per (Note 3).
However, errors in the A/D conversion can occur if the input goes above V
A
or below GND by more than 100 mV. As an example, if V
A
is 3.3V, the full-scale input
voltage must be
≤3.4V to ensure accurate conversions.
ADC12L063
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7