ASD5020L640INT Arctic Silicon Devices, ASD5020L640INT Datasheet - Page 27

• 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
Programmable Gain
The device includes a digital programmable gain in addition to the Full-scale control. The programmable gain of each
channel can be individually set using a four bit code, indicated as cgain*<3:0>. The gain is configured by the register
cgain_cfg, when cgain_cfg equals '0' a gain in dB steps is enabled as defined in table 21 otherwise if cgain_cfg equals '1'
the gain is defined by table 22.
ASD5020
cgain_cfg
fine_gain_en
cgain4_ch1 <3:0>
cgain4_ch2 <3:0>
cgain4_ch3 <3:0>
cgain4_ch4 <3:0>
cgain2_ch1 <3:0>
cgain2_ch2 <3:0>
cgain1_ch1 <3:0>
fgain_branch1<6:0> Programmable fine gain for branch1.
fgain_branch2<6:0> Programmable fine gain for branch 2.
fgain_branch3<6:0> Programmable fine gain for branch 3.
fgain_branch4<6:0> Programmable fine gain for branch 4.
fgain_branch5<6:0> Programmable fine gain for branch 5.
fgain_branch6<6:0> Programmable fine gain for branch 6.
fgain_branch7<6:0> Programmable fine gain for branch 7.
fgain_branch8<6:0> Programmable fine gain for branch 8.
Name
Configures the coarse gain setting
Enable use of fine gain.
Programmable coarse gain channel 1
in a Quad Channel setup.
Programmable coarse gain channel 2
in a Quad Channel setup.
Programmable coarse gain channel 3
in a Quad Channel setup.
Programmable coarse gain channel 4
in a Quad Channel setup.
Programmable coarse gain channel 1
in a Dual Channel setup.
Programmable coarse gain channel 2
in a Dual Channel setup.
Programmable coarse gain channel 1
in a Single Channel setup.
Description
cgain_cfg
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Table 21: Gain setting – dB step
cgain*<3:0>
x-gain enabled
rev 2.0, 2010.11.08
1x / 0dB gain
1x / 0dB gain
1x / 0dB gain
1x / 0dB gain
1x / 0dB gain
1x / 0dB gain
1x / 0dB gain
1x / 0dB gain
Default
Disabled
1x gain
1x gain
1x gain
1x gain
1x gain
1x gain
1x gain
0000
0001
0010
0011
0100
0101
0110
1000
1001
1010
1011
1100
1101
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0111
1110
1111
D15 D14D13D12D11D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
X
Implemented gain [dB]
X
X
X
X
X
X
X
X
X
X
Not used
Not used
Not used
X
X
X
X
X
10
12
11
0
1
2
3
4
5
6
7
8
9
X
X
X
X
X
X
X X X
X X X
X X X
X X X
X X X
X X X
X X X X
X X X X
X X X X X X X
X X X X X X X
X X X X X X X
X X X X X X X
X X X X
X X X X
High Speed Mode
X
X
Address
0x33
0x2A
0x2B
0x34
0x35
0x36
0x37
Hex