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參數(shù)資料
| 型號： | ADE7754ARRL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | ADE7754 |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO24 |
| 封裝： | MS-013AD, SOIC-24 |
| 文件頁數(shù)： | 10/44頁 |
| 文件大小： | 630K |
| 代理商： | ADE7754ARRL |
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REV. PrG 01/03
PRELIMINARY TECHNICAL DATA
ADE7754
–
10
–
POWER SUPPLY MONITOR
The ADE7754 also contains an on-chip power supply moni-
tor. The Analog Supply (AV
DD
) is continuously monitored
by the ADE7754. If the supply is less than 4V ± 5% then the
ADE7754 will go in an inactive state, i.e. no energy will be
accumulated when the supply voltage is below 4V. This is
useful to ensure correct device operation at power up and
during power down. The power supply monitor has built-in
hysteresis and filtering. This gives a high degree of immunity
to false triggering due to noisy supplies.
Time
AVDD
0V
4V
5V
ADE7754
Power-on
Inactive
Active
Inactive
RESET flag in the
Interrupt Status register
Read RSTATUS register
Figure 2 - On chip Power supply monitoring
The RESET bit in the Interrupt Status register is set to logic
one when AVDD drops below 4V ± 5%. The RESET flag is
always masked by the Interrupt Mask register and cannot
cause the
IRQ
pin to go low. The Power supply and
decoupling for the part should be such that the ripple at
AVDD does not exceed 5V ± 5% as specified for normal
operation.
ANALOG INPUTS
The ADE7754 has a total of six analog inputs, dividable into
two channels: current channel and voltage channel. The
current channel consists of three pairs of fully-differential
voltage inputs, namely (I
AP
, I
AN
; I
BP
, I
BN
; I
CP
, I
CN
). The fully
differential voltage input pairs have a maximum differential
voltage of ±0.5V. The voltage channel has three single-ended
voltage inputs V
AP
, V
BP
, and V
CP
. These single-ended volt-
age inputs have a maximum input voltage of ±0.5V with
respect to V
N
. Both the current channel and the voltage
channel have a PGA (Programmable Gain Amplifier) with
possible gain selections of 1, 2, or 4. The same gain is applied
to all the inputs of each channel.
The gain selections are made by writing to the Gain register.
Bits 0 to 1 select the gain for the PGA in the fully-differential
current channel. The gain selection for the PGA in the single-
ended voltage channel is made via bits 5 to 6. Figure 3 shows
how a gain selection for the current channel is made using the
Gain register.
IAP, IBP, ICP
IAN, IBN, ICN
Vin
k·Vin
+
-
GAIN[7:0]
Gain (k)
selection
Figure 3
—
PGA in current channel
Figure 4 shows how the gain settings in PGA 1 (current
channel) and PGA 2 (voltage channel) are selected by various
bits in the Gain register. The no load threshold and sum of
the absolute value can also be selected in the Gain register -
see Table X
.
GAIN REGISTER*
current & voltage Channel PGA Control
4
5
6
7
ADDR: 18h
0
1
2
3
PGA 2 Gain Select
00 = x1
01 = x2
10 = x4
0
0
0
0
0
0
0
0
*Register contents show power on defaults
PGA 1 Gain Select
00 = x1
01 = x2
10 = x4
RESERVED
=0
RESERVED=0
ABS
No
Load
Figure 4
—
ADE7754 Analog Gain register
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|---|---|
| ADE7754ARZ | 功能描述:IC ENERGY METERING 3PHASE 24SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 能量測量 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:* |
| ADE7754ARZRL | 功能描述:IC ENERGY METERING 3PHASE 24SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 能量測量 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:* |
| ADE7755 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Energy Metering IC with Pulse Output |
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| ADE7755AN | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
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