LTC1273(Rev0) Ver la hoja de datos (PDF) - Linear Technology
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LTC1273 Datasheet PDF : 24 Pages
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LTC1273
LTC1275/LTC1276
WU
TI I G CHARACTERISTICS See Timing Characteristics Figures (Note 5)
SYMBOL PARAMETER
t7
Bus Relinquish Time
t8
HBEN to RD Setup Time
t9
HBEN to RD Hold Time
t10
Delay Between RD Operations
t11
Delay Between Conversions
t12
Aperture Delay of Sample-and-Hold
CONDITIONS
Commercial
Military
(Note 10)
Commercial
Military
LTC1273A/LTC1275A/LTC1276A
LTC1273B/LTC1275B/LTC1276B
MIN TYP MAX UNITS
20
30
75
ns
q
20
85
ns
q
20
90
ns
q
0
ns
q
0
ns
q
40
ns
500
ns
q
600
ns
q 1000
ns
25
ns
The q indicates specifications which apply over the full operating
temperature range; all other limits and typicals TA = 25°C.
Note 1: Absolute maximum ratings are those values beyond which the life
of a device may be impaired.
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 VSS (ground for
LTC1273) or above VDD, they will be clamped by internal diodes. This
product can handle input currents greater than 60mA below VSS (ground
for LTC1273) or above VDD without latch-up.
Note 4: When these pin voltages are taken below VSS (ground for
LTC1273) they will be clamped by internal diodes. This product can handle
input currents greater than 60mA below VSS (ground for LTC1273)
without latch-up. These pins are not clamped to VDD.
Note 5: VDD = 5V (VSS = – 5V for LTC1275/LTC1276), 300kHz at 70°C and
250kHz at 125°C, tr = tf = 5ns unless otherwise specified.
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: AIN must not exceed VDD or fall below VSS 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.
WU
TI I G CHARACTERISTICS (Note 5)
Slow Memory Mode, Parallel Read Timing Diagram
ROM Mode, Parallel Read Timing Diagram
CS
RD
BUSY
DATA
HOLD
TRACK
t1
t2
t3
t12
t5
t1
tCONV
t11 t10
OLD DATA
DB11 TO DB0
t6
t7
NEW DATA
DB11 TO DB0
LTC1273/75/76 • TA03
CS
RD
BUSY
DATA
HOLD
TRACK
t1
t4
t5
t2
tCONV
t3
t7
OLD DATA
DB11 TO DB0
t12
t1
t4
t11
t2
t5
tCONV
t3
t7
NEW DATA
DB11 TO DB0
t12
LTC1273/75/76 • TA04
5
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