ADE7758ARWZRL Analog Devices Inc, ADE7758ARWZRL Datasheet - Page 59
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ADE7758ARWZRL
Manufacturer Part Number
ADE7758ARWZRL
Description
IC,Power Metering,SOP,24PIN,PLASTIC
Manufacturer
Analog Devices Inc
Datasheet
1.ADE7758ARWZ.pdf
(72 pages)
Specifications of ADE7758ARWZRL
Input Impedance
380 KOhm
Measurement Error
0.1%
Voltage - I/o High
2.4V
Voltage - I/o Low
0.8V
Current - Supply
8mA
Voltage - Supply
4.75 V ~ 5.25 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-SOIC (0.300", 7.50mm Width)
Meter Type
3 Phase
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ADE7758ARWZRL
Manufacturer:
ADI/亚德诺
Quantity:
20 000
SERIAL READ OPERATION
During a data read operation from the ADE7758, data is shifted
out at the DOUT logic output on the rising edge of SCLK. As
was the case with the data write operation, a data read must be
preceded with a write to the communications register.
With the ADE7758 in communications mode and CS logic low,
an 8-bit write to the communications register takes place first.
The MSB of this byte transfer must be a 0, indicating that the
next data transfer operation is a read. The seven LSBs of this
byte contain the address of the register that is to be read. The
ADE7758 starts shifting out of the register data on the next
rising edge of SCLK (see
logic output switches from a high impedance state and starts
driving the data bus. All remaining bits of register data are
shifted out on subsequent SCLK rising edges. The serial
interface enters communications mode again as soon as the
read is completed. The DOUT logic output enters a high
impedance state on the falling edge of the last SCLK pulse.
Figure 93
). At this point, the DOUT
Rev. D | Page 59 of 72
The read operation can be aborted by bringing the CS logic
input high before the data transfer is completed. The DOUT
output enters a high impedance state on the rising edge of CS .
When an ADE7758 register is addressed for a read operation,
the entire contents of that register are transferred to the serial
port. This allows the ADE7758 to modify its on-chip registers
without the risk of corrupting data during a multibyte transfer.
Note that when a read operation follows a write operation, the
read command (that is, write to communications register)
should not happen for at least 1.1 μs after the end of the write
operation. If the read command is sent within 1.1 μs of the write
operation, the last byte of the write operation can be lost.
ACCESSING THE ON-CHIP REGISTERS
All ADE7758 functionality is accessed via the on-chip registers.
Each register is accessed by first writing to the communications
register and then transferring the register data. For a full
description of the serial interface protocol, see the Serial
Interface section.
ADE7758