MCP3909
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all parameters apply at AVDD = DVDD = 4.5V to 5.5V,
Internal VREF, HPF turned on (AC mode), AGND, DGND = 0V, MCLK = 3.58 MHz; TA = -40°C to +85°C.
Parameter
Sym
Min Typ.
Max Units
Comment
ADC/PGA Specifications
Offset Error
VOS
—
2
5
mV Referred to Input, applies to both
channels
Gain Error Match
Internal Voltage Reference
—
0.5
— % FOUT (Note 5)
Voltage
—
2.4
—
V
Tolerance
—
±2
—
%
Tempco
—
15
— ppm/°C
Reference Input
Input Range
2.2
—
2.6
V
Input Impedance
3.2
—
—
kΩ
Input Capacitance
—
—
10
pF
Analog Inputs
Maximum Signal Level
Differential Input Voltage
Range Channel 0
—
—
±1
V CH0+,CH0-,CH1+,CH1- to AGND
—
— ±470/G mV G = PGA Gain on Channel 0
Differential Input Voltage
Range Channel 1
—
—
±660
mV
Input Impedance
390 —
—
kΩ Proportional to 1/MCLK
Oscillator Input
Frequency Range
MCLK
1
—
4
MHz
Power Specifications
Operating Voltage
4.5
—
5.5
V
AVDD, DVDD
IDD,A
IDD,A
—
2.3
2.8
mA AVDD pin only
IDD,D
IDD,D
—
0.8
1.2
mA DVDD pin only
Note 1:
Measurement error = (Energy Measured By Device - True Energy)/True Energy * 100%. Accuracy is mea-
sured with signal (±660 mV) on Channel 1. FOUT0, FOUT1 pulse outputs. Valid from 45 Hz to 75 Hz. See
typical performance curves for higher frequencies and increased dynamic range. This parameter is not
100% production tested.
2: Does not include internal VREF. Gain = 1, CH0 = 470 mVDC, CH1 = 660 mVDC, difference between
measured output frequency and expected transfer function.
3: Percent of HFOUT output frequency variation; Includes external VREF = 2.5V, CH1 = 100 mVRMS @ 50 Hz,
CH2 = 100 mVRMS @ 50 Hz, AVDD = 5V + 1 Vpp @ 100 Hz. DC PSRR: 5V ±500 mV
4: Error applies down to 60 degree lead (PF = 0.5 capacitive) and 60 degree lag (PF = 0.5 inductive).
5: Refer to Section 4.0 “Device Overview” for complete description.
6: Specified by characterization, not production tested.
7: 1 MCLK period at 3.58 MHz is equivalent to less than < 0.005 degrees at 50 or 60 Hz.
DS22025C-page 4
2006-2012 Microchip Technology Inc.