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PDF MCP3905A Data sheet ( Hoja de datos )
| Número de pieza | MCP3905A | |
| Descripción | (MCP3905A / MCP3906A) Energy Metering ICs | |
| Fabricantes | Microchip Technology | |
| Logotipo |  |
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MCP3905A/05L/06A
Energy Metering ICs with Active Real Power Pulse Output
Features
• Supplies active (real) power measurement for
single-phase, residential energy metering
• Supports IEC 62053 International Energy
Metering Specification and legacy IEC
1036/61036/687 Specifications
• Two multi-bit, DAC, second-order, 16-bit, Delta-
Sigma Analog-to-Digital Converters (ADCs)
• Reduced pulse-width of calibration output
frequency and mechanical counter drive for low
power meter designs (MCP3905L)
• Increased output frequency constant options for
meter design (MCP3905L)
• 0.1% typical measurement error over 500:1
dynamic range (MCP3905A / MCP3905L)
• 0.1% typical measurement error over 1000:1
dynamic range (MCP3906A)
• Programmable Gain Amplifier (PGA) for small
signal inputs supports low value shunt current
sensor:
- 16:1 PGA - MCP3905A / MCP3905L
- 32:1 PGA - MCP3906A
• Ultra-low drift on-chip reference:
15 ppm/°C (typical)
• Direct drive for electromagnetic mechanical
counter and two-phase stepper motors
• Low IDD of 4 mA (typical)
• Tamper output pin for negative power indication
• Industrial Temperature Range: -40°C to +85°C
• Extended Temperature Range: -40°C to +125°C
• Supplies instantaneous real power on HFOUT for
meter calibration
Functional Block Diagram
G0 G1
HPF
CH0+
CH0-
REFIN/
OUT
CH1+
CH1-
+
PGA
–
16-bit
Multi-level
ΔΣ ADC
HPF1
2.4V
Reference
+ 16-bit
–
Multi-level
ΔΣ ADC
HPF1
Description
The MCP3905A/05L/06A devices are energy-metering
ICs designed to support the IEC 62053 international
metering standard specification. They supply a
frequency output proportional to the average active real
power, as well as a higher-frequency output
proportional to the instantaneous power for meter
calibration. The MCP3905L offers reduced pulse width
of calibration output frequency and mechanical counter
drive for lower power meter designs. They include two
16-bit, Delta-Sigma ADCs for a wide range of IB and
IMAX currents and/or small shunt (<200 µOhms) meter
designs. It includes an ultra-low drift voltage reference
with < 15 ppm/°C through a specially designed band
gap temperature curve for the minimum gradient
across the industrial temperature range. A fixed-
function DSP block is on-chip for active real-power
calculation. A no-load threshold block prevents any
current creep measurements. A Power-On Reset
(POR) block restricts meter performance during low-
voltage situations. These accurate energy metering ICs
with high field reliability are available in the industry
standard pinout.
Package Type
24-Pin SSOP DVDD
HPF
AVDD
NC
CH0+
CH0-
CH1-
CH1+
MCLR
REFIN/OUT
AGND
F2
1
2
3
4
5
6
7
8
9
10
11
12
24 FOUT0
23 FOUT1
22 HFOUT
21 DGND
20 NEG
19 NC
18 OSC2
17 OSC1
16 G0
15 G1
14 F0
13 F1
OSC1 OSC2
HFOUT
F2 F1 F0
FOUT0
FOUT1
NEG
X LPF1
E-to-F
conversion
POR
MCLR
© 2006-2011 Microchip Technology Inc.
DS22011B-page 1
1 page  
MCP3905A/05L/06A
TIMING CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all parameters apply at AVDD = DVDD = 4.5V – 5.5V,
AGND, DGND = 0V, MCLK = 3.58 MHz; TA = -40°C to +85°C.
Parameter
Sym Min Typ Max Units
Comment
Frequency Output
FOUT0 and FOUT1 Pulse Width
(Logic Low) for MCP3905A, MCP3906A
devices
tFW
— 275 —
ms 984376 MCLK periods
(Note 1)
HFOUT Pulse Width for MCP3905A,
MCP3906A devices
tHW — 90 — ms 322160 MCLK periods
(Note 2)
FOUT0 and FOUT1 Pulse Width
(Logic Low) for MCP3905L device
tFW — 130 — ms 465344 MCLK periods
(Note 1)
HFOUT Pulse Width for MCP3905L
device
tHW — 65 — ms 232672 MCLK periods
(Note 2)
FOUT0 and FOUT1 Pulse Period
HFOUT Pulse Period
FOUT0 to FOUT1 Falling-Edge Time
FOUT0 to FOUT1 Min Separation
FOUT0 and FOUT1 Output High Voltage
FOUT0 and FOUT1 Output Low Voltage
HFOUT Output High Voltage
HFOUT Output Low Voltage
High-Level Input Voltage
(All Digital Input Pins)
tFP
tHP
tFS2
tFS
VOH
VOL
VOH
VOL
VIH
Refer to Equation 4-1
Refer to Equation 4-2
— 0.5 tFP —
— 4/MCLK —
4.5 —
—
— — 0.5
4.0 —
—
— — 0.5
2.4 —
—
s
s
V IOH = 10 mA, DVDD = 5.0V
V IOL = 10 mA, DVDD = 5.0V
V IOH = 5 mA, DVDD = 5.0V
V IOL = 5 mA, DVDD = 5.0V
V DVDD = 5.0V
Low Level Input Voltage
(All Digital Input Pins)
VIL — — 0.85 V DVDD = 5.0V
Input Leakage Current
Pin Capacitance
— — ±3 µA VIN = 0, VIN = DVDD
— — 10 pF Note 3
Note 1:
2:
If output pulse period (tFP) falls below 984376*2 MCLK periods for MCP3905A/6A and 465344*2 MCLK
periods for MCP3905L, then tFW = 1/2 tFP.
If output pulse period (tHP) falls below 322160*2 MCLK periods for MCP3905A/6A and 232672*2 MCLK
periods for MCP3905L, then tHW = 1/2 tHP. When F2, F1,F0 = 011, tHW is fixed to 18 µs (64 MCLK
periods).
3: Specified by characterization, not production tested.
© 2006-2011 Microchip Technology Inc.
DS22011B-page 5
5 Page 
MCP3905A/05L/06A
Note: Unless otherwise specified, DVDD, AVDD = 5V; AGND, DGND = 0V; VREF = Internal, HPF = 1 (AC mode),
MCLK = 3.58 MHz.
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
0.0001
+85°C
+25°C
- 40°C
0.0010
0.0100
0.1000
CH0 Vp-p Amplitude (V)
1.0000
FIGURE 2-21:
Measurement Error
w/ External VREF, (G = 1).
0.3
0.2
+85°C
+25°C
0.1
0
- 40°C
-0.1
-0.2
-0.3
0.0000
0.0001 0.0010 0.0100
CH1 Vp-p Amplitude (V)
0.1000
FIGURE 2-23:
Measurement Error
w/ External VREF (G = 16).
0.3
0.2 +85°C
0.1 +25°C
0
-40°C
-0.1
-0.2
-0.3
0.0000
0.0001
0.0010
0.0100
CH1 Vp-p Amplitude (V)
0.1000
FIGURE 2-22:
Measurement Error
w/ External VREF (G = 8).
© 2006-2011 Microchip Technology Inc.
DS22011B-page 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MCP3905A.PDF ] | |
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