ltc2182 Linear Technology Corporation, ltc2182 Datasheet - Page 8

• Manufacturer Part Number: ltc2182
• Description: 16-bit, 65msps/ 40msps/25msps Low Power Dual Adcs
• Manufacturer: Linear Technology Corporation

LTC2182/LTC2181/LTC2180
SYMBOL
Digital Data Outputs (LVDS Mode)
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
(LTC2181), or 25MHz (LTC2180), LVDS outputs, differential ENC
2V
otherwise noted.
8
TIMING CHARACTERISTICS
range, otherwise specifications are at T
D
C
SKEW
SCK
S
H
DS
DH
DO
P-P
sine wave, input range = 2V
DD
PARAMETER
ENC to Data Delay
ENC to CLKOUT Delay
DATA to CLKOUT Skew
Pipeline Latency
SCK Period
CS to SCK Setup Time
SCK to CS Setup Time
SDI Setup Time
SDI Hold Time
SCK Falling to SDO Valid
= OV
DD
= 1.8V, f
SAMPLE
P-P
= 65MHz (LTC2182), 40MHz
with differential drive, unless
DD
A
= 25°C. (Note 5)
without latchup.
CONDITIONS
C
C
t
Write Mode
Readback Mode, C
Readback Mode, C
D
L
L
– t
= 5pF (Note 8)
= 5pF (Note 8)
C
(Note 8)
The
+
/ENC
l
DD
denotes the specifications which apply over the full operating temperature
, they
–
SDO
SDO
DD
=
= 20pF , R
= 20pF , R
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 –0.5 LSB 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
25MHz (LTC2180), CMOS outputs, ENC
wave, ENC
each digital output unless otherwise noted. The supply current and power
dissipation specifications are totals for the entire IC, not per channel.
Note 10: Recommended operating conditions.
PULLUP
PULLUP
DD
–
= 2k
= 2k
= 0V, input range = 2V
= 1.8V, f
l
l
l
l
l
l
l
l
l
l
SAMPLE
= 65MHz (LTC2182), 40MHz (LTC2181), or
MIN
250
1.1
40
1
0
5
5
5
5
P-P
with differential drive, 5pF load on
+
= single-ended 1.8V square
TYP
1.8
1.5
0.3
6.5
MAX
125
3.2
2.7
0.6
UNITS
Cycles
218210f
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns