CS5460A-BSZ Cirrus Logic Inc, CS5460A-BSZ Datasheet - Page 17

• Manufacturer Part Number: CS5460A-BSZ
• Description: IC ENERGY METERING 1PHASE 24SSOP
• Manufacturer: Cirrus Logic Inc

Specifications of CS5460A-BSZ

• Package / Case: 24-SSOP
• Input Impedance: 30 KOhm
• Measurement Error: 0.1%
• Voltage - I/o High: 0.8V
• Voltage - I/o Low: 0.2V
• Current - Supply: 2.9mA
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Meter Type: Single Phase
• Output Voltage Range: 2.4 V to 2.6 V
• Output Current: 1 uA
• Input Voltage Range: 2.4 V to 2.6 V
• Input Current: 25 nA
• Power Dissipation: 500 mW
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Ic Function: Single Phase Bi-directional Power / Energy IC
• Brief Features: On-Chip Functions, AC Or DC System Calibration, Power Supply Monitor
• Supply Voltage Range: 3.3V To 5V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: CDB5460AU - EVALUATION BOARD FOR CS5460A
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 598-1094-5

complete isolation from the power lines. This isola-
tion is achieved using three transformers. One
transformer is a general-purpose voltage trans-
former, used to supply the on-board DC power to
the CS5460A. A second transformer is a high-pre-
cision, low-impedance voltage transformer (often
called a ‘potential transformer’) with very little
roll-off/phase delay, even at the higher harmonics.
A current transformer is then used to sense the line
current. A burden resistor placed across the sec-
ondary of the current transformer creates the cur-
rent-sense voltage signal, for the CS5460A’s
current channel inputs. Because the CS5460A is
DS487F4
Figure 6. Typical Connection Diagram (One-Phase 2-Wire, Direct Connect to Power Line)
N
R
2
To Service
120 VAC
R
1
L
470 nF
R
Shunt
500 Ω
R
R
** Refer to Input Filtering
*
* Refer to Input Protection
I-
*
I+
R
*
V-
+
100 µF
500
C
C
* *
* *
C
I-
I+
C
Ω
*
V+
* *
V-
*
0.1 µF
not directly connected to the power mains, isola-
tion is not required for the CS5460A’s digital inter-
face.
Figure 8 shows the CS5460A configured to mea-
sure power in a single-phase 3-wire system. In
many 3-wire residential power systems within the
United States, only the two Line terminals are
available (neutral is not available). Figure 9 shows
how the CS5460A can be configured to meter a
3-wire system when no neutral is available.
C * *
C * *
Idiff
0.1 µF
Vdiff
10
15
16
12
11
9
VIN+
VIN-
IIN-
IIN+
VREFIN
VREFOUT
VA+
NOTE: Current channel
input measures voltage
(just like voltage input).
14
VA-
CS5460A
13
10 Ω
DGND
CPUCLK
PFMON
RESET
XOUT
EOUT
SCLK
4
EDIR
VD+
SDO
XIN
SDI
INT
CS
3
5 k Ω
22
21
17
2
1
24
19
7
23
6
5
20
0.1 µF
Mech. Counter
Stepper Motor
2.5 MHz to
20 MHz
or
Optional
Source
10 k Ω
Clock
Interface
Serial
Data
CS5460A
17