参数资料
型号: EM250-RCM-R
厂商: Silicon Laboratories Inc
文件页数: 97/124页
文件大小: 0K
描述: EM250 RCM BOARD
标准包装: 12
类型: 收发器,802.15.4/Zigbee
频率: 2.4GHz
适用于相关产品: EM250
其它名称: 636-1023
EM250
5.5
ADC Module
The ADC is a first-order sigma-delta converter sampling at 1MHz with programmable resolution and conversion
rate. Table 33 describes the key ADC Module parameter measured at 25°C and VDD_PADS at 3.0V. The single-
ended measurements were done at f input = 7.7% f Nyquist ; 0dBFS level (where full-scale is a 1.2Vp-p swing). The
differential measurements were done at f input = 7.7% f Nyquist ; -6dBFS level (where full-scale is a 2.4Vp-p swing).
Table 33. ADC Module Key Parameters
Parameter
Performance
ADC_RATE[2:0]
Conversion Time ( ? s)
Nyquist Freq (Hz)
3dB Cut-off (Hz)
INL (codes peak)
INL (codes RMS)
DNL (codes peak)
DNL (codes RMS)
ENOB
0
32
15.6k
9.4k
0.04
0.02
0.04
0.02
5.5
1
64
7.8k
4.7k
0.04
0.02
0.03
0.01
7.0
2
128
3.9k
2.3k
0.05
0.02
0.04
0.01
7.5
3
256
1.9k
1.1k
0.09
0.03
0.04
0.01
10.0
4
512
980
590
0.2
0.05
0.04
0.01
11.5
5
1024
490
290
0.3
0.1
0.09
0.03
12.0
6
2048
240
140
0.6
0.2
0.12
0.03
12.5
7
4096
120
72
1.2
0.4
0.1
0.03
12.5
(from single-cycle test)
SNR (dB)
Single-Ended
Differential
35
36
44
45
53
54
62
62
69
68
74
71
75
73
74
73
SINAD (dB)
Single-Ended
Differential
35
35
44
44
53
53
61
62
66
68
67
71
68
73
67
72
SDFR (dB)
Single-Ended
Differential
63
61
69
70
70
75
70
74
70
78
69
80
70
84
70
89
THD (dB)
Single-Ended
Differential
-55
-57
-63
-64
-67
-74
-69
-82
-69
-87
-69
-93
-69
-94
-69
-93
ENOB (from SNR)
Single-Ended
Differential
5.8
7.0
7.3
8.5
8.8
10.0
10.3
11.3
11.5
12.3
12.3
12.8
12.5
13.1
12.3
13.1
ENOB (from SINAD)
Single-Ended
Differential
Equivalent ADC Bits
ADC_DATA[x:y]
5.8
7.0
5
[15:11]
7.3
8.3
6
[15:10]
8.8
9.8
7
[15:9]
10.1
11.3
8
[15:8]
11.0
12.3
9
[15:7]
11.1
12.8
10
[15:6]
11.3
13.1
11
[15:5]
11.1
13.0
12
[15:4]
Note:
INL and DNL are referenced to a LSB of the Equivalent ADC Bits shown in the last row of Table
33. ENOB (effective number of bits) can be calculated from either SNR (signal to non-harmonic
noise ratio) or SINAD (signal-to-noise and distortion ratio).
Page 97
120-0082-000V Rev 1.1
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