5
LTC1273
LTC1275/LTC1276
127356fa
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
3
Data Access Time After RD↓ C
L
= 20pF 40 90 ns
Commercial
● 110 ns
Military ● 120 ns
C
L
= 100pF 50 125 ns
Commercial
● 150 ns
Military ● 170 ns
t
4
RD Pulse Width ● t
3
ns
t
5
CS to RD Hold Time ● 0ns
t
6
Data Setup Time After BUSY↑ 40 70 ns
Commercial
● 90 ns
Military ● 100 ns
t
7
Bus Relinquish Time 20 30 75 ns
Commercial
● 20 85 ns
Military ● 20 90 ns
t
8
HBEN to RD Setup Time ● 0ns
t
9
HBEN to RD Hold Time ● 0ns
t
10
Delay Between RD Operations ● 40 ns
t
11
Delay Between Conversions (Note 10) 500 ns
Commercial
● 600 ns
Military ● 1000 ns
t
12
Aperture Delay of Sample-and-Hold 25 ns
LTC1273A/LTC1275A/LTC1276A
LTC1273B/LTC1275B/LTC1276B
Note 6: Linearity, offset and full scale specifications apply for unipolar and
bipolar modes.
Note 7: Integral nonlinearity is defined as the deviation of a code from a
straight line passing through the actual endpoints of the transfer curve.
The deviation is measured from the center of the quantization band.
Note 8: Bipolar offset (LTC1275/LTC1276) is the different voltage
measured from –0.5LSB when the LTC1275/LTC1276 output code flickers
between 0000 0000 0000 and 1111 1111 1111.
Note 9: Guaranteed by design, not subject to test.
Note 10: Recommended operating conditions.
Note11: A
IN
must not exceed V
DD
or fall below V
SS
by more than 50mV for
specified accuracy. Therefore the minimum supply voltage for the
LTC1273 is +4.95V. The minimum supplies for the LTC1275 are +4.75V
and –2.45V and the minimum supplies for the LTC1276 are ±4.95V.
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 ground with DGND and
AGND wired together (unless otherwise noted).
Note 3: When these pin voltages are taken below V
SS
(ground for
LTC1273) or above V
DD
, they will be clamped by internal diodes. This
product can handle input currents greater than 60mA below V
SS
(ground
for LTC1273) or above V
DD
without latch-up.
Note 4: When these pin voltages are taken below V
SS
(ground for
LTC1273) they will be clamped by internal diodes. This product can handle
input currents greater than 60mA below V
SS
(ground for LTC1273)
without latch-up. These pins are not clamped to V
DD
.
Note 5: V
DD
= 5V (V
SS
= –5V for LTC1275/LTC1276), 300kHz at 70°C and
250kHz at 125°C, t
r
= t
f
= 5ns unless otherwise specified.
TI I G CHARACTERISTICS
W
U
The ● denotes the specifications which apply over the full operating temperature
range, otherwise specfications are at T
A
= 25°C. See Timing Characteristics Figures (Note 5)
