Datasheet

MCP3905/06
DS21948E-page 4 © 2009 Microchip Technology Inc.
TEMPERATURE CHARACTERISTICS
Reference Input
Input Range 2.2 — 2.6 V
Input Impedance 3.2 — — kΩ
Input Capacitance — — 10 pF
Analog Inputs
Maximum Signal Level — — ±1 V CH0+,CH0-,CH1+,CH1- to A
GND
Differential Input Voltage
Range Channel 0
— — ±470/G mV G = PGA Gain on Channel 0
Differential Input Voltage
Range Channel 1
——±660mV
Input Impedance 390 — — kΩ Proportional to 1/MCLK frequency
Bandwidth
(Notch Frequency)
— 14 — kHz Proportional to MCLK frequency,
MCLK/256
Oscillator Input
Frequency Range MCLK 1 — 4 MHz
Power Specifications
Operating Voltage 4.5 — 5.5 V AV
DD,
DV
DD
I
DD,A
I
DD,A
—2.7 3.0 mAAV
DD
pin only
I
DD,D
I
DD,D
—1.2 2.0 mADV
DD
pin only
Electrical Specifications: Unless otherwise indicated, V
DD
= 4.5V – 5.5V, A
GND
, D
GND
= 0V.
Parameters Sym Min Typ Max Units Conditions
Temperature Ranges
Specified Temperature Range T
A
-40 — +85 °C
Operating Temperature Range T
A
-40 — +125 °C Note
Storage Temperature Range T
A
-65 — +150 °C
Thermal Package Resistances
Thermal Resistance, 24L-SSOP θ
JA
—73—°C/W
Note: The MCP3905/06 operate over this extended temperature range, but with reduced performance. In any
case, the Junction Temperature (T
J
) must not exceed the Absolute Maximum specification of +150°C.
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all parameters apply at AV
DD
= DV
DD
= 4.5V – 5.5V,
Internal V
REF
, HPF turned on (AC mode), A
GND
, D
GND
= 0V, MCLK = 3.58 MHz; T
A
= -40°C to +85°C.
Parameter Sym Min Typ. Max Units Comment
Note 1: Measurement error = (Energy Measured By Device - True Energy)/True Energy * 100%. Accuracy is
measured with signal (±660 mV) on Channel 1. F
OUT0
, F
OUT1
pulse outputs. Valid from 45 Hz to 65 Hz.
See Section 2.0 “Typical Performance Curves” for higher frequencies and increased dynamic range.
2: Does not include internal V
REF
. Gain = 1, CH0 = 470 mVDC, CH1 = 660 mVDC, difference between
measured output frequency and expected transfer function.
3: Percent of HF
OUT
output frequency variation; Includes external V
REF
= 2.5V, CH1 = 100 mVRMS @
50 Hz, CH2 = 100 mVRMS @ 50 Hz, AV
DD
= 5V + 1V
pp
@ 100 Hz. DC PSRR: 5V ±500 mV.
4: Error applies down to 60° lead (PF = 0.5 capacitive) and 60° 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.
8: Gain error match is measured from CH0 G = 1 to any other gain setting.