THS1401 Datasheet, PDF (15/22 Pages) Texas Instruments – 14-BIT, 1/3/8 MSPS DSP COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS WITH INTERNAL REFERENCE AND PGA

THS1401, THS1403, THS1408
14-BIT, 1/3/8 MSPS DSP COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS
WITH INTERNAL REFERENCE AND PGA
SLAS248 – DECEMBER 1999
PRINCIPLES OF OPERATION
Table 4. Control Register, Address 3, Read
BIT
D13
Function PWD
D12
REF
D11
FOR
D10
TM2
D9
TM1
D8
TM0
D7
OFF
D6
RES
D5
RES
D4
RES
D3
RES
D2
RES
D1
RES
D0
RES
Table 5. Control Register, Address 3, Write
BIT
Function
Default
D13
PWD
0
D12
REF
0
D11
FOR
0
D10
TM2
0
D9
TM1
0
D8
TM0
0
D7
OFF
0
D6
RES
0
D5
RES
0
D4
RES
0
D3
RES
0
D2
RES
0
D1
RES
0
D0
RES
0
PWD:
REF:
FOR:
TM2–0:
Power down
Reference select
Output format
Test mode
OF:
RES
Offset correction
Reserved
0 = normal operation
1 = power down
0 = internal reference 1 = external reference
0 = straight binary
1 = 2s complement
000 = normal operation
001 = both inputs = REF–
010 = IN+ at V_ref/2, IN– at REF–
011 = IN+ at REF+, IN– at REF–
100 = normal operation
101 = both inputs = REF+
110 = IN+ at REF–, IN– at V_ref/2
111 = IN+ at REF–, IN– at REF+
0 = enable
1 = disable
Must be set to 0.
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