ltc2195 Linear Technology Corporation, ltc2195 Datasheet - Page 6

• Manufacturer Part Number: ltc2195
• Description: Ltc2195/ltc2194/ltc2193 - 16-bit, 125/105/80msps Low Power Dual Adcs
• Manufacturer: Linear Technology Corporation

LTC2195
LTC2194/LTC2193
TIMING CHARACTERISTICS
SYMBOL
f
t
t
t
SYMBOL
Digital Data Outputs (R
t
t
t
t
t
t
SPI Port Timing (Note 8)
t
t
t
t
t
t
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All voltage values are with respect to GND with GND and OGND
shorted (unless otherwise noted).
Note 3: When these pin voltages are taken below GND or above V
will be clamped by internal diodes. This product can handle input currents
of greater than 100mA below GND or above V
Note 4: When these pin voltages are taken below GND they will be
clamped by internal diodes. When these pin voltages are taken above V
they will not be clamped by internal diodes. This product can handle input
currents of greater than 100mA below GND without latchup.
Note 5: V
(LTC2194), or 80MHz (LTC2193), 2-lane output mode, differential
ENC
unless otherwise noted.
6
range, otherwise specifications are at T
S
ENCL
ENCH
AP
SER
FRAME
DATA
PD
r
SCK
S
H
DS
DH
DO
f
+
/ENC
DD
–
= 2V
PARAMETER
Sampling Frequency
ENC Low Time (Note 8) Duty Cycle Stabilizer Off
ENC High Time (Note 8) Duty Cycle Stabilizer Off
Sample-and-Hold
Acquistion Delay Time
PARAMETER
Serial Data Bit Period
FR to DCO Delay
Data to DCO Delay
Propagation Delay
Output Rise Time
Output Fall Time
DCO Cycle-Cycle Jitter
Pipeline Latency
SCK Period
CS-to-CLK Setup Time
SCK-to-CS Setup Time
SDI Setup Time
SDI Hold Time
SCK Falling to SDO
Valid
= OV
P-P
DD
sine wave, input range = 2V
= 1.8V, f
TERM
SAMPLE
= 100Ω Differential, C
= 125MHz (LTC2195), 105MHz
CONDITIONS
(Notes 10, 11)
Duty Cycle Stabilizer On
Duty Cycle Stabilizer On
CONDITIONS
4-Lane Output Mode
2-Lane Output Mode
1-Lane Output Mode
(Note 8)
(Note 8)
(Note 8)
Data, DCO, FR, 20% to 80%
Data, DCO, FR, 20% to 80%
t
Write Mode
Readback Mode,
C
Readback Mode,
C
SER
SDO
SDO
= 1ns
= 20pF , R
= 20pF , R
DD
A
P-P
= 25°C. (Note 5)
without latchup.
with differential drive,
L
PULLUP
PULLUP
= 2pF to GND On Each Output)
The
= 2k
= 2k
l
DD
denotes the specifications which apply over the full operating temperature
, they
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
DD
MIN
3.8
3.8
5
2
2
0.7n + 2 • t
0.35 • t
0.35 • t
Note 6: Integral nonlinearity is defined as the deviation of a code from a
best fit straight line to the transfer curve. The deviation is measured from
the center of the quantization band.
Note 7: Offset error is the offset voltage measured from –0.5LSB when
the output code flickers between 0000 0000 0000 0000 and 1111 1111
1111 1111 in 2’s complement output mode.
Note 8: Guaranteed by design, not subject to test.
Note 9: V
105MHz (LTC2194), or 80MHz (LTC2193), 2-lane output mode,
ENC
with differential drive, unless otherwise noted. The supply current and
power dissipation specifications are totals for the entire IC, not per
channel.
Note 10: Recommended operating conditions.
Note 11: The maximum sampling frequency depends on the speed grade
of the part and also which serialization mode is used. The maximum serial
data rate is 1000Mbps, so t
LTC2195
TYP
MIN
250
40
4
4
4
4
0
5
5
5
5
+
= single-ended 1.8V square wave, ENC
SER
SER
SER
DD
MAX
125
100
100
100
100
= OV
DD
MIN
4.52
4.52
5
2
2
=1.8V, f
1.1n + 2 • t
1/(16 • f
0.5 • t
0.5 • t
LTC2194
1/(4 • f
1/(8 • f
4.76
4.76
4.76
4.76
0.17
0.17
TYP
TYP
SAMPLE
60
SER
0
7
SER
SER
S
S
must be greater than or equal to 1ns.
S
)
)
SER
)
MAX
105
100
100
100
100
= 125MHz (LTC2195),
MIN
5.93
5.93
5
2
2
–
1.5n + 2 • t
= 0V, input range = 2V
0.65 • t
0.65 • t
LTC2193
MAX
6.25
6.25
6.25
6.25
TYP
125
0
SER
SER
SER
MAX
100
100
100
100
80
P-P
219543p
UNITS
UNITS
Cycles
ps
MHz
Sec
Sec
Sec
Sec
P-P
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns