LTC1605
5
1605fd
For more information www.linear.com/LTC1605
POWER REQUIREMENTS
TIMING CHARACTERISTICS
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 5)
SYMBOL PARAMETER CONDITIONS
LTC1605/LTC1605A
UNITSMIN TYP MAX
f
SAMPLE(MAX)
Maximum Sampling Frequency
l
100 kHz
t
CONV
Conversion Time
l
8 µs
t
ACQ
Acquisition Time
l
2 µs
t
1
Convert Pulse Width (Note 11)
l
40 ns
t
2
Data Valid Delay After R/C↓ (Note 9)
l
8 µs
t
3
BUSY Delay from R/C↓ C
L
= 50pF
l
65 ns
t
4
BUSY Low 8 µs
t
5
BUSY Delay After End of Conversion 220 ns
t
6
Aperture Delay 40 ns
t
7
Bus Relinquish Time
l
10 35 83 ns
t
8
BUSY Delay After Data Valid
l
50 200 ns
t
9
Previous Data Valid After R/C↓ 7.4 µs
t
10
R/C to CS Setup Time (Notes 9, 10) 10 ns
t
11
Time Between Conversions 10 µs
t
12
Bus Access and Byte Delay (Notes 9, 10) 10 83 ns
SYMBOL PARAMETER CONDITIONS
LTC1605/LTC1605A
UNITSMIN TYP MAX
V
DD
Positive Supply Voltage (Notes 9, 10) 4.75 5.25 V
I
DD
Positive Supply Current
l
11 16 mA
P
DIS
Power Dissipation 55 80 mW
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, AGND1
and AGND2 wired together (unless otherwise noted).
Note 3: When these pin voltages are taken below ground or above V
ANA
= V
DIG
= V
DD
, they will be clamped by internal diodes. This product can
handle input currents of greater than 100mA below ground or above V
DD
without latch-up.
Note 4: When these pin voltages are taken below ground, they will be
clamped by internal diodes. This product can handle input currents of
90mA below ground without latchup. These pins are not clamped to V
DD
.
Note 5: V
DD
= 5V, f
SAMPLE
= 100kHz, t
r
= t
f
= 5ns unless otherwise specified.
Note 6: Linearity, offset and full-scale specifications apply for a V
IN
input
with respect to ground
.
Note 7: Integral nonlinearity is defined as the deviation of a code from a
straight line passing through the actual end points of the transfer curve.
The deviation is measured from the center of the quantization band.
Note 8: Bipolar offset is the offset voltage measured from –0.5LSB when the
output code flickers between 0000 0000 0000 0000 and 1111 1111 1111 1111.
Note 9: Guaranteed by design, not subject to test.
Note 10: Recommended operating conditions.
Note 11: With CS low the falling R/C edge starts a conversion. If R/C
returns high at a critical point during the conversion it can create small
errors. For best results ensure that R/C returns high within 3µs after the
start of the conversion.
Note 12: As measured with fixed resistors shown in Figure 4. Adjustable to
zero with external potentiometer.
Note 13: Full-scale error is the worst-case of –FS or +FS untrimmed
deviation from ideal first and last code transitions, divided by the transition
voltage (not divided by the full-scale range) and includes the effect of
offset error.
Note 14: All specifications in dB are referred to a full-scale ±10V input.
Note 15: Full-power bandwidth is defined as full-scale input frequency at which
a signal-to-(noise + distortion) degrades to 60dB or 10 bits of accuracy.
Note 16: Recovers to specified performance after (2 • FS) input
overvoltage.
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 5)
