Features: ` Energy Data Linearity: ±0.1% of Reading over 1000:1 Dynamic Range
` On-Chip Functions: Energy, I ∗ V, IRMS and VRMS, Energy-to-Pulse Conversion
` Smart "Auto-Boot" Mode from Serial EEPROM with no microcontroller.
` AC or DC System Calibration
` Mechanical Counter/Stepper Motor Driver
` Meets Accuracy Spec for IEC 687/1036, JIS
` Power Consumption <12 mW
` Interface Optimized for Shunt Sensor
` Phase Compensation
` Ground-Referenced Signals with Single Supply
` On-chip 2.5 V Reference (MAX 60 ppm/ drift)
` Simple Three-Wire Digital Serial Interface
` Watch Dog Timer
` Power Supply Monitor
` Power Supply Configurations
VA+ = +5 V; VA- = 0 V; VD+ = +3 V to +5 V
VA+ = +2.5 V; VA- = -2.5 V; VD+ = +3 V
Pinout
Specifications
|
Parameter |
Symbol |
Min |
Typ |
Max |
Unit |
DC Power Supplies (Notes 12 and 13)
Positive Digital
Positive Analog
Negative Analog |
VD+
VA+
VA- |
-0.3
-0.3
+0.3 |
-
-
- |
+6.0
+6.0
-6.0 |
V
V
V |
| Input Current, Any Pin Except Supplies (Note 14 and 15) |
IIN |
- |
- |
±10 |
mA |
| Output Current |
IOUT |
- |
- |
±25 |
mA |
| Power Dissipation(Note 16) |
PDN |
- |
- |
500 |
mW |
| Analog Input Voltage All Analog Pins |
VINA |
- 0.3 |
- |
(VA+) + 0.3 |
V |
| Digital Input Voltage All Digital Pins |
VIND |
- 0.3 |
- |
(VD+) + 0.3 |
V |
| Ambient Operating Temperature |
TA |
-40 |
- |
85 |
|
| Storage Temperature |
Tstg |
-65 |
- |
150 |
|
Notes:
11. All voltages with respect to ground.
12. VA+ and VA- must satisfy {(VA+) - (VA-)} +6.0 V.
13. VD+ and VA- must satisfy {(VD+) - (VA-)} +6.0 V.
14. Applies to all pins including continuous over-voltage conditions at the analog input (AIN) pins.
15. Transient current of up to 100 mA will not cause SCR latch-up. Maximum input current for a power supply pin is ±50 mA.
16. Total power dissipation, including all input currents and output currents.
WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
DescriptionThe CS5460A is a highly integrated Analog-to-Digital Converter (ADC) which combines two ADCs, high speed power calculation functions, and a serial interface on a single chip. It is designed to accurately measure and calculate: Energy, Instantaneous Power, IRMS, and VRMS for single phase 2- or 3-wire power metering applications.
The CS5460A interfaces to a low-cost shunt resistor or transformer to measure current, and resistive divider or potential transformer to measure voltage. The CS5460A features a bi-directional serial interface for communication with a micro-controller and a programmable frequency output that is proportional to energy.
CS5460A has on-chip functionality to facilitate AC or DC system-level calibration.
The "Auto-Boot" feature allows the CS5460A to function 'stand-alone' and to initialize itself on system power up.
In Auto-Boot Mode, the CS5460A reads the calibration data and start-up instructions from an external EEPROM.
In this mode, the CS5460A can work without the need for a microprocessor, for low-cost metering applications.
23759 Data Sheet
