CS4373 Datasheet, PDF (13/20 Pages) Cirrus Logic – Low-power, High-performance Delta-Sigma Test DAC

CS4373
7. TEST MODES
The CS4373 has 7 test modes. The MODE0,
MODE1, and MODE2 pins define which mode
the part will operate. Table 1 lists the test
mode options and corresponding MODE pin
settings.
The following subsections explain the CS4373
Test Mode Options:
7.1 Test Mode 0: Reserved
7.2 Test Mode 1: Sensor Test Mode
This mode is used to test an external sensor
such as a hydrophone or geophone. Both the
BUF± and OUT± are active outputs; and im-
pulse response, linearity, and sensor imped-
ance can be measured in the Sensor Test
Mode. See Figure 6 for a typical connection di-
agram..
Test Mode 0
Test Mode 1
Test Mode 2
Test Mode 3
Test Mode 4
Test Mode 5
Test Mode 6
Test Mode 7
MODE2
0
0
0
0
1
1
1
1
MODE1
0
0
1
1
0
0
1
1
MODE0
0
1
0
1
0
1
0
1
Reserved
Sensor Test Mode (OUT± AND BUF±)
Electronics Test (OUT± ONLY)
Sensor Test (BUF± ONLY)
Common Mode
High Voltage/High Current Mode
Reserved
Sleep Mode
Table 1. Test Modes
Hydrophone
or
Geophone
10nF
COG
CAP+
CAP-
CS4373
R
BUF+
R
BUF-
OUT+
OUT-
Hydrophone
or
Geophone
10nF
COG
CAP+
CAP-
CS4373
R
BUF+
R
BUF-
OUT+
OUT-
INA+
INA-
INB+
INB-
CS3301/
CS3302
Figure 6. Test Mode 1
DS577F1
INA+
INA-
INB+
INB-
CS3301/
CS3302
Figure 7. Test Mode 4
13