Reference inputs, Digital logic input output characteristics, Converter ac characteristics – Rainbow Electronics ADC12048 User Manual
Page 5
Reference Inputs
The following specifications apply to the ADC12048 for V
A
a
e
V
D
a
e
5V V
REF
a
e
4 096V
V
REF
b
e
0 0V 12-bit a sign conversion mode f
CLK
e
12 0 MHz R
S
e
25X source impedance for V
REF
a
and V
REF
b
s
1X fully differential input with fixed 2 048V common-mode voltage and minimum acquisition time unless otherwise specified
Boldface limits apply for T
A
e
T
J
e
T
MIN
to T
MAX
all other limits T
A
e
T
J
e
25 C
Symbol
Parameter
Conditions
Typical
Limits
Unit
(Note 10)
(Note 11)
(Limit)
I
REF
Reference Input Current
V
REF
a
4 096V V
REF
b
e
0V
Analog Input Signal 1 kHz
145
m
A
(Note 20)
80 kHz
136
m
A
C
REF
Reference Input Capacitance
85
pF
Digital Logic Input Output Characteristics
The following specifications apply to the ADC12048 for
V
A
a
e
V
D
a
e
5V V
REF
a
e
4 096V V
REF
b
e
0 0V 12-bit a sign conversion mode f
CLK
e
12 0 MHz R
S
e
25X source
impedance for V
REF
a
and V
REF
b
s
1X fully differential input with fixed 2 048V common-mode voltage and minimum acquisi-
tion time unless otherwise specified Boldface limits apply for T
A
e
T
J
e
T
MIN
to T
MAX
all other limits T
A
e
T
J
e
25 C
Symbol
Parameter
Conditions
Typical
Limits
Unit
(Note 10)
(Note 11)
(Limit)
V
IH
Logic High Input Voltage
V
A
a
e
V
D
a
e
5 5V
2 0
V (min)
V
IL
Logic Low Input Voltage
V
A
a
e
V
D
a
e
4 5V
0 8
V (max)
I
IH
Logic High Input Current
V
IN
e
5V
0 035
2 0
m
A (max)
I
IL
Logic Low Input Current
V
IN
e
0V
b
0 035
b
2 0
m
A (max)
V
OH
Logic High Output Voltage
V
A
a
e
V
D
a
e
4 5V
I
OUT
e b
1 6 mA
2 4
V (min)
V
OL
Logic Low Output Voltage
V
A
a
e
V
D
a
e
4 5V
I
OUT
e
1 6 mA
0 4
V (max)
I
OFF
TRI-STATE Output
V
OUT
e
0V
g
2 0
m
A (max)
Leakage Current
V
OUT
e
5V
C
IN
D12 – D0 Input Capacitance
10
pF
Converter AC Characteristics
The following specifications apply to the ADC12048 for V
S
a
e
V
D
a
e
5V
V
REF
a
e
4 096V V
REF
b
e
0 0V 12-bit a sign conversion mode f
CLK
e
12 0 MHz R
S
e
25X source impedance for V
REF
a
and V
REF
b
s
1X fully differential input with fixed 2 048V common-mode voltage and minimum acquisition time unless
otherwise specified Boldface limits apply for T
A
e
T
J
e
T
MIN
to T
MAX
all other limits T
A
e
T
J
e
25 C
Symbol
Parameter
Conditions
Typical
Limits
Unit
(Note 10)
(Note 11)
(Limit)
t
Z
Auto Zero Time
78
78 clks a 120 ns
clks (max)
t
CAL
Full Calibration Time
4946
4946 clks a 120 ns
clks (max)
CLK Duty Cycle
50
%
40
% (min)
60
% (max)
t
CONV
Conversion Time
Sync-Out Mode
44
44
clks (max)
t
AcqSYNCOUT
Acquisition Time
Minimum for 13 Bits
9
9 clks a 120 ns
clks (max)
(Programmable)
Maximum for 13 Bits
79
79 clks a 120 ns
clks (max)
5