ADS-112
12-Bit, 1MHz, Low-Power Sampling A/D Converters
Table 4. Output Coding
STRAIGHT BIN.
UNIPOLAR
SCALE
+FS – 1 LSB
+7/8 FS
+3/4 FS
+1/2 FS
+1/4 FS
+1/8 FS
+1 LSB
0
INPUT RANGE
0 to +10V
+9.9976
+8.7500
+7.5000
+5.0000
+2.5000
+1.2500
+0.0024
0.0000
COMP. BINARY
INPUT RANGE
±5V
+4.9976
+3.7500
+2.5000
0.0000
–2.5000
–3.7500
–4.9976
–5.0000
BIPOLAR
SCALE
+FS –1 LSB
+3/4FS
+1/2FS
0
–1/2FS
–3/4FS
–FS+1LSB
–FS
OUTPUT CODING
MSB
1111
1110
1100
1000
0100
0010
0000
0000
LSB
1111
0000
0000
0000
0000
0000
0000
0000
1111
0000
0000
0000
0000
0000
0001
0000
MSB
0000
0001
0011
0111
1011
1101
1111
1111
0000
1111
1111
1111
1111
1111
1111
1111
LSB
0000
1111
1111
1111
1111
1111
1110
1111
OFF. BINARY
COMP. OFF. BIN.
0
–10
Amplitude Relative to Full Scale (dB)
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
50
100
150
200
250
300
350
400
450
500
Frequency (kHz)
(fs = 1MHz, fin = 485kHz, Vin = –0.5dB, 4,096-point FFT)
Figure 5. FFT Analysis of ADS-112
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Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDA_ADS-112.B01
Page 5 of 6
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