MAX1392 Datasheet, PDF (14/19 Pages) Maxim Integrated Products – 1.5V to 3.6V, 357ksps, 1-Channel True-Differential/ 2-Channel Single-Ended, 10-Bit, SAR ADCs

1.5V to 3.6V, 357ksps, 1-Channel True-Differential/
2-Channel Single-Ended, 10-Bit, SAR ADCs
I/O
OE
FSX
CS
FSR
MAX1392
CLKX
SCLK _MAX1395
CLKR
DR
DOUT
I/O
UNI/BIP
(CH1/CH2)*
a) TMS320C541 CONNECTION DIAGRAM
I/O
OE
TFS
CS
RFS
MAX1392
SCLK
SCLK _MAX1395
DR
DOUT
I/O
UNI/BIP
(CH1/CH2)*
b) ADSP218x CONNECTION DIAGRAM
I/O
OE
SC2
CS
MAX1392
SLK
SCLK _MAX1395
SDR
DOUT
I/O
UNI/BIP
(CH1/CH2)*
c) DSP563xx CONNECTION DIAGRAM
*INDICATES THE MAX1395
Figure 11. Common DSP Connections to the MAX1392/MAX1395
Differential Nonlinearity (DNL)
DNL is the difference between an actual step width and
the ideal value of 1 LSB. A DNL error specification of
less than ±1 LSB guarantees no missing codes and a
monotonic transfer function. For the MAX1392/
MAX1395, DNL deviations are measured at every step
and the worst-case deviation is reported in the
Electrical Characteristics section.
3.0
2.8
2.6
2.4
2.2
2.0
1.8
T_A = +25°C
1.6
0 100 200 300 400 500 600 700
DAYS
Figure 12a. Typical 2xAA Discharge Curve at 100ksps
3.0
2.8
2.6
2.4
2.2
2.0
1.8
T_A = +25°C
1.6
0
10
20
30
40
50
DAYS
Figure 12b. Typical CR2032 Discharge Curve at 100ksps
Signal-to-Noise Plus Distortion (SINAD)
SINAD is computed by taking the ratio of the RMS sig-
nal to the RMS noise plus the RMS distortion. RMS
noise includes all spectral components to the Nyquist
frequency excluding the fundamental, the first five har-
monics (HD2–HD5), and the DC offset. RMS distortion
includes the first five harmonics (HD2–HD5).
SINAD


= 20 × log _


SIGNAL_RMS


2
NOISE_RMS
+
2
DISTORTION_RMS

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