ASD5020L640INT Arctic Silicon Devices, ASD5020L640INT Datasheet - Page 28

• Manufacturer Part Number: ASD5020L640INT
• Description: ADC (A/D Converters) Mul-Md 12bit/640MSPS 8-bit 1000 MSPS ADC
• Manufacturer: Arctic Silicon Devices

Specifications of ASD5020L640INT

• Number Of Converters: 1
• Number Of Adc Inputs: 2
• Conversion Rate: 640 MSPs
• Resolution: 12 bit
• Snr: 70 dB
• Voltage Reference: 1 V
• Supply Voltage (max): 2 V
• Supply Voltage (min): 1.7 V
• Maximum Power Dissipation: 490 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-48
• Input Voltage: 1.8 V
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Preliminary Product Specification
There is a digital fine gain implemented for each ADC branch to adjust the fine gain errors between the branches. The
gain is controlled by fgain_branch* as defined in table 23. For the high speed interleaved modes, there will be no missing
codes when using digital fine gain, due to higher resolution internally (1 bit). The relationship between channels and ADC
branches is shown in tables 24-26.
To enable the fine gain function the register bit fine_gain_en has to be activated, set to '1'.
ASD5020
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
fgain_branchx<6:0>
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
cgain_cfg
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
OUT=(1+2
OUT=(1+2
OUT=(1+2
OUT=(1+2
OUT=(1+2
OUT=(1+2
OUT=(1+2
OUT=IN
OUT=IN
OUT=(1-2
OUT=(1-2
OUT=(1-2
OUT=(1-2
OUT=(1-2
OUT=(1-2
OUT=(1-2
Table 22: Gain setting - x step
Table 23: Fine gain setting
cgain*<3:0>
-13
-12
-12
-8
-8
-8
-8
-8
-8
-8
-8
-12
-12
-13
rev 2.0, 2010.11.08
-2
-2
-2
-2
+2
+2
+2
+2
)*IN
)*IN
-2
+2
)*IN
)*IN
0000
0001
0010
0011
0100
0101
0110
1000
1001
1010
1011
1100
1101
Page 28 of 34
0111
1110
-9
-9
-9
-9
1111
-13
-9
-9
-9
-9
-2
-2
-2
-2
Arithmetic function
-13
+2
+2
+2
+2
)*IN
-10
-10
-10
-10
)*IN
-10
-10
-10
-10
-2
-2
-2
-2
+2
+2
+2
+2
-11
-11
-11
-11
-11
-11
-11
-11
)*IN
-2
-2
-2
-13
-12
-12
+2
+2
+2
)*IN
)*IN
)*IN
-2
Implemented gain factor
-12
-12
-13
-13
+2
)*IN
)*IN
)*IN
-13
)*IN
Not used
Not used
1.25
12.5
2.5
[x]
10
16
20
25
32
50
1
2
4
5
8
Implemented
gain (x)
1.0004
1.0002
1.0001
1.0077
1.0076
1.0074
1.0073
1.0000
1.0000
0.9999
0.9998
0.9996
0.9927
0.9926
0.9924
0.9923
···
···
···
···
···
···
High Speed Mode
Gain (dB)
-0.0011
-0.0021
-0.0032
-0.0639
-0.0649
-0.0660
-0.0670
0.0665
0.0655
0.0644
0.0634
0.0031
0.0021
0.0010
0.0000
0.0000
···
···
···
···
···
···