CS5014-BL14Z Cirrus Logic Inc, CS5014-BL14Z Datasheet - Page 27

• Manufacturer Part Number: CS5014-BL14Z
• Description: IC ADC 14BIT SELF-CALBR 44-PLCC
• Manufacturer: Cirrus Logic Inc

Specifications of CS5014-BL14Z

• Number Of Bits: 14
• Sampling Rate (per Second): 56k
• Data Interface: Parallel
• Number Of Converters: 1
• Power Dissipation (max): 250mW
• Voltage Supply Source: Analog and Digital, Dual ±
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 598-1075-5

Signal
Amplitude
Relative to
Full Scale
analysis with the Discrete Fourier Transform",
Proc. IEEE, Vol. 66, No. 1, Jan 1978, pp.51-83.
This is available on request from Crystal Semi-
conductor.
Figures 18, 21, and 23 show the performance of
the CS5012A/14/16 with 1kHz full-scale inputs.
Figure 19 shows CS5012A performance with
12kHz full-scale inputs. Notice that the perform-
ance CS5012A/14/16 closely approaches that of
the corresponding ideal ADC.
DS14F8
DS14F9
Signal to
Noise +
Distortion
(dB)
-100dB
-120dB
-20dB
-40dB
-60dB
-80dB
0dB
Figure 22. Plot of Ideal 16-bit ADC
75
70
65
60
55
dc
0
20
Input Frequency
Figure 24. CS5012A High Frequency Input Performance
40
S/(N+D): 97.5 dB
f s
/2
1
60
f /2
s
80
Input Frequency (kHz)
2
CS5012A High Frequency Performance
The CS5012A performs very well over a wide
range of input frequencies as shown in Figure 24.
The figure depicts the
der four different conditions. The conditions
include tests with the voltage reference set at 4.5
and at 2.5 volts with input signals at 0.5 dB down
from full scale and 6.0 dB down from full scale.
The sample rate is at 100 kHz for all cases. The
plots indicate that the part performs very well
even with input frequencies above the Nyquist
rate. Best performance at the higher frequencies
is achieved with a 2.5 volt reference.
Signal
Amplitude
Relative to
Full Scale
100
f s
Figure 23. CS5016 FFT plot with 1 kHz
-100dB
-120dB
-20dB
-40dB
-60dB
-80dB
0dB
CS5012A CS5014 CS5016
120
dc
CS5012A
CS5012A, CS5014, CS5016
Full Scale Input
1 kHz
1.
2.
3.
4.
140
VREF
CS5012A-KP7
4.5
2.5
4.5
2.5
Input Frequency
160
Signal
FS-0.5dB
FS-0.5dB
FS-6.0dB
FS-6.0dB
4
f s =100 kSps
3
Sampling Rate: 50 kHz
Full Scale: 9V p-p
S/(N+D): 92.4 dB
180
tested un-
25 kHz
200
2-33
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