LTC1273_1 Datasheet, PDF (5/24 Pages) Linear Technology – 12-Bit, 300ksps Sampling A/D Converters with Reference

LTC1273
LTC1275/LTC1276
WU
TI I G CHARACTERISTICS ^{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)
SYMBOL PARAMETER
CONDITIONS
LTC1273A/LTC1275A/LTC1276A
LTC1273B/LTC1275B/LTC1276B
MIN TYP MAX UNITS
t₃
Data Access Time After RD↓
C_L = 20pF
Commercial
Military
40
90
ns
●
110
ns
●
120
ns
C_L = 100pF
Commercial
Military
50
125
ns
●
150
ns
●
170
ns
t₄
RD Pulse Width
t₅
CS to RD Hold Time
t₆
Data Setup Time After BUSY↑
Commercial
Military
●
t₃
ns
●
0
ns
40
70
ns
●
90
ns
●
100
ns
t₇
Bus Relinquish Time
Commercial
Military
20
30
75
ns
●
20
85
ns
●
20
90
ns
t₈
HBEN to RD Setup Time
t₉
HBEN to RD Hold Time
t₁₀
Delay Between RD Operations
t₁₁
Delay Between Conversions
(Note 10)
Commercial
Military
●
0
ns
●
0
ns
●
40
ns
500
ns
●
600
ns
● 1000
ns
t₁₂
Aperture Delay of Sample-and-Hold
25
ns
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.
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.
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