LTC1608AIG View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1608AIG' PDF : 20 Pages View PDF
LTC1608
ELECTRICAL CHARACTERISTICS
Note 4: When these pin voltages are taken below VSS, they will be clamped
by internal diodes. This product can handle input currents greater than
100mA below VSS without latchup. These pins are not clamped to VDD.
Note 5: VDD = 5V, VSS = – 5V, fSMPL = 500kHz, and tr = tf = 5ns unless
otherwise specified.
Note 6: Linearity, offset and full-scale specification apply for a single-
ended AIN+ input with AIN– grounded.
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: Typical RMS noise at the code transitions.
Note 9: 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 10: Signal-to-Noise Ratio (SNR) is measured at 5kHz and distortion
is measured at 100kHz. These results are used to calculate Signal-to-Nosie
Plus Distortion (SINAD).
Note 11: Guaranteed by design, not subject to test.
Note 12: Recommended operating conditions.
Note 13: The falling CONVST edge starts a conversion. If CONVST returns
high at a critical point during the conversion it can create small errors. For
best performance ensure that CONVST returns high either within 250ns
after conversion start or after BUSY rises.
Note 14: The acquisition time would go up to 400ns and the conversion
time would go up to 1.8µs. However, the throughput time (acquisition +
conversion) is guaranteed by test to be 2µs max.
Note 15: If RD↓ precedes CS↓, the output enable will be gated by CS↓.
TYPICAL PERFOR A CE CHARACTERISTICS
Integral Nonlinearity
vs Output Code
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–32768 –16384
0
CODE
16384 32767
1608 G01
Signal-to-Noise Ratio
vs Input Frequency
100
90
80
70
60
50
40
30
20
10
0
1k
10k
100k
FREQUENCY (Hz)
1M
1608 G04
Differential Nonlinearity
vs Output Code
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–32768 –16384
0
CODE
16384 32767
1608 G02
Distortion vs Input Frequency
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
1k
THD
3RD
2ND
10k
100k
1M
INPUT FREQUENCY (Hz)
1608 G05
S/(N + D) vs Input Frequency
and Amplitude
100
VIN = 0dB
90
80
VIN = –20dB
70
60
VIN = –40dB
50
40
30
20
10
0
1k
10k
100k
1M
FREQUENCY (Hz)
1608 G03
Spurious-Free Dynamic Range
vs Input Frequency
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
1k
10k
100k
1M
INPUT FREQUENCY (Hz)
1608 G06
5
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