CDB5566 Cirrus Logic Inc, CDB5566 Datasheet - Page 22

• Manufacturer Part Number: CDB5566
• Description: Dev Bd For I/C 24-bit, Diff, 5kSPS, DAQ
• Manufacturer: Cirrus Logic Inc
• Type: A/Dr

Specifications of CDB5566

• Number Of Adc's: 1
• Number Of Bits: 24
• Sampling Rate (per Second): 5k
• Data Interface: SPI™
• Inputs Per Adc: 2 Differential
• Input Range: 0 ~ 4.096 V
• Power (typ) @ Conditions: 20mW @ 5kSPS
• Voltage Supply Source: Analog and Digital, Dual ±
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: CS5566
• Conversion Rate: 5 KSPS
• Resolution: 24 bit
• Maximum Clock Frequency: 8 MHz
• Interface Type: SPI
• Supply Voltage (max): 3.3 V
• Supply Voltage (min): - 2.5 V
• Product: Data Conversion Development Tools
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: CS5566
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 598-1557; CDB-5566

Figure 16
is about 8.2 microvolts peak to peak, or about 17 codes peak to peak.
with a signal at about 2.6 microvolts peak to peak, or about 5 codes peak to peak. The CS5566 achieves
superb performance with this small signal.
Figure 18
rious frequency content due to digital activity inside the chip.
Figure 19
22
illustrates the noise floor of the converter from 0.1 Hz to 2.5 kHz. The plot is entirely free of spu-
illustrates the device with a small signal 1/1,000,000 of full scale. The signal input for figure 15
illustrates a noise histogram of the converter constructed from 4096 samples.
-100
-120
-140
-160
-180
-60
-80
0.1
Figure 18. Spectral Plot of Noise with Shorted Input
100
-100
-120
-140
-160
-180
90
80
70
60
50
40
30
20
10
-20
-40
-60
-80
Figure 19. Noise Histogram (4096 Samples)
0
Figure 17. Spectral Performance, -130 dB
0
0
1
500
3/25/08
Frequency (Hz)
Output Codes
1k
Frequency (Hz)
10
277 Hz, -130 dB
32k Samples @ 5 kSps
1.5k
4096 Samples
Mean = 96.32
Std. Dev. = 21.3
Max - Min = 150
100
2k
Figure 17
Shorted Input
2M Samples @ 5 kSps
16 Averages
2.5k
illustrates the converter
1k
2.5k
CS5566
DS806PP1