LTC1604
5
1604fa
TIMING CHARACTERISTICS (Note 5)
The
l denotes specifications that apply over the full operating temperature
range.
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, OGND
and AGND wired together unless otherwise noted.
Note 3: When these pin voltages are taken below VSS or above VDD, they
will be clamped by internal diodes. This product can handle input currents
greater than 100mA below VSS or above VDD without latchup.
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 = 333kHz, 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. See Figure 17 for
histogram.
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.
TYPICAL PERFORMANCE CHARACTERISTICS
Integral Nonlinearity vs
Output Code
Signal-to-Noise Ratio vs
Input Frequency
Differential Nonlinearity vs
Output Code
Distortion vs Input Frequency
S/(N + D) vs Input Frequency
and Amplitude
Spurious-Free Dynamic Range
vs Input Frequency
CODE
INL
(LSB)
–32768
–16384
0
16384
32767
1604 G11
2.0
1.5
1.0
0.5
0.0
–0.5
–1.0
–1.5
–2.0
CODE
–32768
–16384
16384
32767
DNL
(LSB)
1604 G10
1.0
0.8
0.6
0.4
0.2
0.0
–0.2
–0.4
–0.6
–0.8
–1.0
0
FREQUENCY (Hz)
1k
SINAD
(dB)
100
90
80
70
60
50
40
30
20
10
0
10k
100k
1M
1604 G01
VIN = 0dB
VIN = –20dB
VIN = –40dB
FREQUENCY (Hz)
100
90
80
70
60
50
40
30
20
10
0
SIGNAL-TO-NOISE
RATIO
(dB)
1604 G03
1k
10k
100k
1M
INPUT FREQUENCY (Hz)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
AMPLITUDE
(dB
BELOW
THE
FUNDAMENTAL)
1604 G04
1k
10k
100k
1M
THD
3RD
2ND
INPUT FREQUENCY (Hz)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
SPURIOUS-FREE
DYNAMIC
RANGE
(dB)
1604 G05
1k
10k
100k
1M