ADC1443D125HD IDT [Integrated Device Technology], ADC1443D125HD Datasheet - Page 29

• Manufacturer Part Number: ADC1443D125HD
• Description: Dual channel 14-bit ADC; 125, 160 or 200 Msps; JESD204B serial outputs
• Manufacturer: IDT [Integrated Device Technology]

Integrated Device Technology
ADC1443D_SER
Objective data sheet
11.3.5 Test patterns
11.3.6 Output data format selection
11.3.7 Output codes versus input voltage
The ADC1443D can be configured to transmit a number of predefined test patterns using
the SPI local registers (bits TEST_PAT_SEL[2:0] in Table 14 and Table 28). The selected
test pattern is transmitted regardless of the analog input.
Table 14.
Default values are shown highlighted.
A custom test pattern can be defined using the SPI local registers
(bits TEST_PAT_USER[13:6] in Table 29 and bits TEST_PAT_USER[5:0] in Table 30).
The ADC1443D output data format can be selected (offset binary, two’s complement or
gray code) using the SPI local registers (bits DATA_FORMAT[1:0] in Table 26).
Table 15.
TEST_PAT_SEL[2:0]
000
001
010
011
100
101
110
111
V
< 1
1
0.99987793
0.99975586
...
0.00024414
0.00012207
+0.00012207
+0.0.00024414 10 0000 0000 0001
...
+0.99975586
+0.99987793
+1
> +1
INP
 V
INM
Digital test pattern selection
Output codes
Offset binary
00 0000 0000 0000
00 0000 0000 0000
00 0000 0000 0001
00 0000 0000 0010
...
01 1111 1111 1110
01 1111 1111 1111
10 0000 0000 0000
...
11 1111 1111 1101
11 1111 1111 1110
11 1111 1111 1111
11 1111 1111 1111
Dual 14-bit ADC; 125, 160 or 200 Msps; JESD204A/B serial outputs
Rev. 03 — 19 July 2012
Two’s complement
10 0000 0000 0000
10 0000 0000 0000
10 0000 0000 0001
00 0000 0000 0010
...
11 1111 1111 1110
11 1111 1111 1111
00 0000 0000 0000
00 0000 0000 0001
...
01 1111 1111 1101
01 1111 1111 1110
01 1111 1111 1111
01 1111 1111 1111
Digital test pattern
Off
Mid code
Min code
Max code
Toggle ‘1111..1111’/’0000..0000’
Custom test pattern
‘1010..1010’
‘0101..0101’
ADC1443D series
Gray code
00 0000 0000 0000
00 0000 0000 0000
00 0000 0000 0001
00 0000 0000 0011
...
01 0000 0000 0001
01 0000 0000 0000
11 0000 0000 0000
11 0000 0000 0001
...
10 0000 0000 0011
10 0000 0000 0001
10 0000 0000 0000
10 0000 0000 0000
© IDT 2012. All rights reserved.
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OTR
1
0
0
0
0
0
0
0
0
0
0
0
0
1