MCP3905L Microchip Technology, MCP3905L Datasheet - Page 10

• Manufacturer Part Number: MCP3905L
• Description: (MCP3905A / MCP3906A) Energy Metering ICs
• Manufacturer: Microchip Technology

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MCP3905A/05L/06A
3.0
The descriptions of the pins are listed in
TABLE 3-1:
3.1
DV
within the MCP3905A/05L/06A devices.
This pin requires appropriate bypass capacitors and
should be maintained to 5V ±10% for specified
operation.
Information”.
3.2
HPF controls the state of the high-pass filter in both
input channels. A logic ‘1’ enables both filters,
removing any DC offset coming from the system or the
device. A logic ‘0’ disables both filters allowing DC
voltages to be measured.
DS22011A-page 10
DD
is the power supply pin for the digital circuitry
Pin No.
PIN DESCRIPTIONS
Digital V
High-Pass Filter Input Logic Pin
(HPF)
10
12
13
14
15
16
17
18
19
20
21
22
23
24
11
1
2
3
4
5
6
7
8
9
Refer
PIN FUNCTION TABLE
DD
to
(DV
REFIN/OUT
Section 5.0
Symbol
HF
MCLR
OSC1
OSC2
F
F
DV
CH0+
CH1+
AV
A
D
CH0-
CH1-
NEG
HPF
DD
OUT1
OUT0
NC
G1
G0
NC
GND
F2
F1
F0
GND
OUT
DD
DD
)
“Applications
Table
Digital Power Supply Pin
High-Pass Filters Control Logic Pin
Analog Power Supply Pin
No Connect
Non-Inverting Analog Input Pin for Channel 0 (Current Channel)
Inverting Analog Input Pin for Channel 0 (Current Channel)
Inverting Analog Input Pin for Channel 1 (Voltage Channel)
Non-Inverting Analog Input Pin for Channel 1 (Voltage Channel)
Master Clear Logic Input Pin
Voltage Reference Input/Output Pin
Analog Ground Pin, Return Path for internal analog circuitry
Frequency Control for HF
Frequency Control for F
Frequency Control for F
Gain Control Logic Input Pin
Gain Control Logic Input Pin
Oscillator Crystal Connection Pin or Clock Input Pin
Oscillator Crystal Connection Pin or Clock Output Pin
No Connect
Negative Power Logic Output Pin
Digital Ground Pin, Return Path for Internal Digital Circuitry
High-Frequency Logic Output Pin (Intended for Calibration)
Differential Mechanical Counter Logic Output Pin
Differential Mechanical Counter Logic Output Pin
3-1.
3.3
AV
within the MCP3905A/05L/06A devices.
This pin requires appropriate bypass capacitors and
should be maintained to 5V ±10% for specified
operation.
Information”.
3.4
CH0- and CH0+ are the fully differential analog voltage
input channels for the current measurement, containing
a PGA for small-signal input, such as shunt current
sensing. The linear and specified region of this channel
is dependant on the PGA gain. This corresponds to a
maximum differential voltage of ±470 mV/GAIN and
maximum absolute voltage, with respect to A
±1V. Up to ±6V can be applied to these pins without the
risk of permanent damage.
Refer to Section 1.0 “Electrical Characteristics”.
OUT0/1
OUT0/1
OUT
DD
is the power supply pin for the analog circuitry
Logic Input Pin
Logic Input Pin
Logic Input Pin
Analog V
Current Channel (CH0-, CH0+)
Function
Refer
to
DD
© 2006 Microchip Technology Inc.
(AV
Section 5.0
DD
)
“Applications
GND
, of