Datasheet
Table Of Contents
- MCP3905A/05L/06A
- Features
- Description
- Package Type
- Functional Block Diagram
- Notes:
- 1.0 Electrical Characteristics
- 2.0 Typical Performance Curves
- FIGURE 2-1: Measurement Error, Gain = 8 PF = 1.
- FIGURE 2-2: Measurement Error, Gain = 16, PF = 1.
- FIGURE 2-3: Measurement Error, Gain = 32, PF = 1.
- FIGURE 2-4: Measurement Error, Gain = 8, PF = 0.5.
- FIGURE 2-5: Measurement Error, Gain = 16, PF = 0.5.
- FIGURE 2-6: Measurement Error, Gain =32, PF = 0.5.
- FIGURE 2-7: Measurement Error, Gain = 1, PF = 1.
- FIGURE 2-8: Measurement Error, Gain = 2, PF = 1.
- FIGURE 2-9: Measurement Error, Gain = 1, PF = + 0.5.
- FIGURE 2-10: Measurement Error, Gain = 2, PF = + 0.5.
- FIGURE 2-11: Measurement Error, Temperature = +125°C, Gain = 1.
- FIGURE 2-12: Measurement Error, Temperature = +125°C, Gain = 2.
- FIGURE 2-13: Measurement Error, Temperature = +125°C, Gain = 8.
- FIGURE 2-14: Measurement Error, Temperature = +125°C, Gain = 16.
- FIGURE 2-15: Measurement Error vs. Input Frequency.
- FIGURE 2-16: Channel 0 Offset Error (DC Mode, HPF off), G = 1.
- FIGURE 2-17: Channel 0 Offset Error (DC Mode, HPF off), G = 8.
- FIGURE 2-18: Channel 0 Offset Error (DC Mode, HPF Off), G = 16.
- FIGURE 2-19: Measurement Error vs. VDD (G = 16).
- FIGURE 2-20: Measurement Error vs. VDD, G = 16, External VREF.
- FIGURE 2-21: Measurement Error w/ External VREF, (G = 1).
- FIGURE 2-22: Measurement Error w/ External VREF (G = 8).
- FIGURE 2-23: Measurement Error w/ External VREF (G = 16).
- 3.0 Pin Descriptions
- TABLE 3-1: Pin Function Table
- 3.1 Digital VDD (DVDD)
- 3.2 High-Pass Filter Input Logic Pin (HPF)
- 3.3 Analog VDD (AVDD)
- 3.4 Current Channel (CH0-, CH0+)
- 3.5 Voltage Channel (CH1-,CH1+)
- 3.6 Master Clear (MCLR)
- 3.7 Reference (REFIN/OUT)
- 3.8 Analog Ground (AGND)
- 3.9 Frequency Control Logic Pins (F2, F1, F0)
- 3.10 Gain Control Logic Pins (G1, G0)
- 3.11 Oscillator (OSC1, OSC2)
- 3.12 Negative Power Output Logic Pin (NEG)
- 3.13 Ground Connection (DGND)
- 3.14 High-Frequency Output (HFOUT)
- 3.15 Frequency Output (FOUT0, FOUT1)
- 4.0 Device Overview
- 5.0 Applications Information
- 6.0 Packaging Information
- Trademarks
- Worldwide Sales and Service
MCP3905A/05L/06A
DS22011B-page 4 © 2006-2011 Microchip Technology Inc.
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
TEMPERATURE CHARACTERISTICS
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
Note: The MCP3905A/05L/06A 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 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 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.