ad1843jst Analog Devices, Inc., ad1843jst Datasheet - Page 60

• Manufacturer Part Number: ad1843jst
• Description: Serial-port 16-bit Soundcomm Codec
• Manufacturer: Analog Devices, Inc.

AD1843
–100
–110
–100
–120
–140
–160
–180
Figure 37. AD1843 Modem Mode Frequency Response Plots (Full-Scale Line-Level Inputs, 0 dB Gain)
Based on 7.2 kHz sample rate; other sample rates will show slightly different behavior. See the
”Specifications” section for performance limits. The DAC plots do not reflect the additional beneficial
roll-off of the AD1843 analog filters. Out-of-band images will be attenuated by an additional 31.4 dB
at 100 kHz.
–10
–20
–30
–40
–50
–60
–70
–80
–90
–20
–40
–60
–80
0
0
0
0
4.8
0.8
b. DAC Modem 0–57.6 kHz
9.6
1.6
a. ADC Modem Full
14.4 19.2
2.4
24.0
3.2
kHz
28.8
kHz
4.0
33.6
4.8
38.4
43.2
5.6
48.0 52.8
6.4
7.2
–60–
–0.020
–0.040
–0.060
–0.080
–0.100
–0.120
–0.140
–0.160
–0.180
–0.200
–0.220
–0.240
–0.040
–0.080
–0.120
–0.160
–0.200
–0.240
0.080
0.040
0.020
0.000
0.040
0.000
0.2
0.2
c. ADC Modem Passband
d. DAC Modem Passband
0.6
0.6
1.0
1.0
1.4
1.4
kHz
kHz
1.8
1.8
2.2
2.2
2.6
2.6
3.0
3.0
REV. 0