CSE7766

Single-phase Multi-function Measuring Chip

The CSE7766 is a single-phase multi-function measuring chip from Chipsea. View the full CSE7766 datasheet below including absolute maximum ratings.

Manufacturer

Chipsea

Overview

Part: CSE7766 — Chipsea Type: Single-phase Multi-function Measuring Chip

Description: The CSE7766 is a single-phase multi-function measuring chip that provides high-frequency pulse output (CF) for electric quantity measurement and allows direct reading of current, voltage, and power parameters via UART at 4800bps.

Operating Conditions:

Supply voltage: 4.5–5.5 V
Operating temperature: -40 to 85 °C
UART baud rate: 4800bps (±2%)

Absolute Maximum Ratings:

Max supply voltage: +6.0 V
Max analog input voltage (V1P, V1N, V2P): +2 V
Max operating ambient temperature: 85 °C
Max storage temperature: 150 °C

Key Specs:

Current consumption (VDD = 5 V): 4 mA
Power consumption (VDD = 5 V): 20 mW
Built-in reference voltage (VREF): 2.3–2.55 V (typical 2.43 V)
Reference voltage temperature excursion: 25 ppm/°C
Master clock frequency (MCLK): 3.04–4.12 MHz (typical 3.579 MHz)
Current measurement relative error (30.9A~250mA): ±1%
Voltage measurement relative error (80V~260V): ±1%
Power measurement relative error (Above 55W): ±1%

Features:

Calibration-free electric energy measurement.
High-frequency pulse CF output for electric quantity.
UART communication for reading current, voltage, and power parameters.
Built-in power supply monitoring circuit (reset below 4V).
Built-in 2.43V voltage reference source.
SOP8 package.

Applications:

Single-phase multifunction watt-hour meter
Measuring socket
Data display instrument

Package:

SOP8

Pin Configuration

CSE7766 is packaged in SOP8.

Figure 1: Chip Pin Diagram

Rev1.2 Page 4 of 25

Absolute Maximum Ratings

Parameters	Symbol	Min. Value	Typica l Value	Max. Value	Unit
power supply	VDD	-0.3	-	+6.0	V
V1P, V1N, V2P		-2		+2	V
Analog input voltage	V INA	-0.3	-	VDD+0.3	V
Digital input voltage	V IND	-0.3	-	VDD+0.3	V
Digital output voltage	V OUTD	-0.3	-	VDD+0.3	V
Operating ambient temperature	T A	-40	-	85	° C
Storage temperature	T stg	-65	-	150	° C

Recommended Operating Conditions

Parameters	Symbol	Min. Value	Typical Value	Max. Value	Unit
power range	VDD	4.5	5.0	5.5	V
Temperature range	T A	-40	-	85	°C

Typical Application

As shown in Figure 2, two small capacitors shall be connected in parallel on power supply terminal of CSE7766 to filter out high-frequency and low-frequency noise from power grid. The current signal is connected to CSE7766 after being sampled by manganin resistor and the voltage signal is inputted into CSE7766 after passing through resistor network. CSE7766 must be connected to the current signal and the voltage signal simultaneously but shall not be connected only to either signal.

Figure 2: Typical Application of CSE7766 (Isollation)

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