CDB5466U Cirrus Logic Inc, CDB5466U Datasheet - Page 12

• Manufacturer Part Number: CDB5466U
• Description: BOARD EVAL & SOFTWARE CS5466 ADC
• Manufacturer: Cirrus Logic Inc
• Type: A/Dr

Specifications of CDB5466U

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: CS5466
• Primary Attributes: 1-Phase, Energy-to-Frequency Output
• Secondary Attributes: Graphical User Interface, USB Interface
• Product: Data Conversion Development Tools
• Maximum Clock Frequency: 4 MHz
• Interface Type: USB
• Supply Voltage (max): 5 V
• Supply Voltage (min): 3.3 V
• For Use With/related Products: CS5466
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 598-1011

5.3.3
The pulse output FOUT is designed to assist with meter
calibration. Using the FREQ[2:0] pins, FOUT can be set
to frequencies higher than that of E1 and E2. The FOUT
frequency is directly proportional to the E1 and E2 fre-
quencies. Table 2 defines the maximum frequencies for
FOUT and the dependency of FOUT on E1 and E2.
5.3.4
The CS5466 supports input signals on the voltage and
current channels that may not be a sine wave. A typical
situation of achieving the absolute maximum frequency
on E1 and E2 would be if a 250 mV dc signal is applied
to the VIN and IIN input pins. The digital high-pass filter
should be disengaged by selecting HPF = 1.
12
Notes:
FREQ2
0
0
0
0
1
1
1
1
Selecting Frequency of FOUT
Absolute Max Frequency on E1
and E2
2
3
1
Frequency Select
MCLK = 4.096 MHz
See
A pure sinusoidal input with zero phase shift is applied to the voltage and current channel.
FREQ1
Figure 1 on page 8
0
0
1
1
0
0
1
1
Table 2. Maximum Frequency for E1, E2, and FOUT
FREQ0
0
1
0
1
0
1
0
1
for E1 and E2 timing diagram.
E1 or E2
0.125 Hz
0.125 Hz
Maximum Frequency for a Sine Wave (Notes 1, 2 and 3)
0.25 Hz
0.25 Hz
1.0 Hz
0.5 Hz
1.0 Hz
0.5Hz
The absolute maximum pulse rate observed on E1 and
E2, determined by the FREQ[2:0] selection is defined
below in Table 3.
FREQ2 FREQ1 FREQ0
Table 3. Absolute Max Frequency on E1 and E2
Frequency Select
x
x
x
x
0.25 Hz
0.25 Hz
E1+E2
0.5 Hz
1.0 Hz
2.0 Hz
0.5 Hz
1.0 Hz
2.0 Hz
0
0
1
1
2048x(E1+E2)
128x(E1+E2)
64x(E1+E2)
32x(E1+E2)
16x(E1+E2)
64x(E1+E2)
32x(E1+E2)
16x(E1+E2)
0
1
0
1
Absolute Max Frequency
E1 or E2
0.25 Hz
FOUT
0.5 Hz
1.0 Hz
2.0 Hz
4,096 Hz
16 Hz
16 Hz
16 Hz
32 Hz
32 Hz
32 Hz
32 Hz
CS5466
E1+E2
0.5 Hz
1.0 Hz
2.0 Hz
4.0 Hz
DS659F1