Datasheet
Table Of Contents
- 1.0 Electrical Characteristics
- 2.0 Typical Performance Curves
- FIGURE 2-1: INL Error vs. Input Voltage (VDD = 2.7V).
- FIGURE 2-2: INL Error vs. Input Voltage (VDD = 5.0V).
- FIGURE 2-3: INL Error vs. Input Voltage (VDD = 5.0V, VREF = 5V).
- FIGURE 2-4: Maximum INL Error vs. VREF.
- FIGURE 2-5: Maximum INL Error vs. Temperature.
- FIGURE 2-6: Output Noise vs. Input Voltage (VDD = 2.7V).
- FIGURE 2-7: Output Noise vs. Input Voltage (VDD = 5.0V).
- FIGURE 2-8: Output Noise vs. VREF.
- FIGURE 2-9: Output Noise vs.VDD.
- FIGURE 2-10: Output Noise vs. Temperature.
- FIGURE 2-11: Offset Error vs VDD (VCM = 0V).
- FIGURE 2-12: Offset Error vs. Temperature (VREF = 5.0V).
- FIGURE 2-13: Full Scale Error vs. VDD.
- FIGURE 2-14: Full Scale Error vs. Temperature.
- FIGURE 2-15: Full Scale Error vs. Temperature (VREF = 5.0V).
- FIGURE 2-16: MCP3550/1 Output Noise Histogram.
- FIGURE 2-17: MCP3553 Output Noise Histogram.
- FIGURE 2-18: Total Unadjusted Error (TUE) vs. Input Voltage (VDD = 2.7V).
- FIGURE 2-19: Total Unadjusted Error (TUE) vs. Input Voltage.
- FIGURE 2-20: Total Unadjusted Error (TUE) vs. Input Voltage (VREF = 5.0V).
- FIGURE 2-21: Maximum TUE vs. VREF.
- FIGURE 2-22: Maximum TUE vs. Temperature.
- FIGURE 2-23: Maximum TUE vs. VDD.
- FIGURE 2-24: IDDS vs. Temperature.
- FIGURE 2-25: IDD vs. VDD.
- FIGURE 2-26: IDD vs. Temperature.
- 3.0 Pin Descriptions
- 4.0 Device Overview
- FIGURE 4-1: MCP3550/1/3 Functional Block Diagram.
- 4.1 MCP3550/1/3 Delta-Sigma Modulator with Internal Offset and Gain Calibration
- 4.2 Digital Filter
- TABLE 4-1: data rate, output noise and Digital filter specificaTIons by device
- FIGURE 4-2: SINC Filter Response, MCP3550-50 Device.
- FIGURE 4-3: SINC Filter Response, MCP3550-60 Device.
- FIGURE 4-4: SINC Filter Response, MCP3551 Device, Simultaneous 50/60 Hz Rejection.
- FIGURE 4-5: SINC Filter Response at Integer Multiples of the Sampling Frequency (fs).
- 4.3 Internal Oscillator
- 4.4 Differential Analog Inputs
- 4.5 Voltage Reference Input Pin
- 4.6 Power-On Reset (POR)
- 4.7 Shutdown Mode
- 4.8 Sleep Mode
- 5.0 Serial Interface
- 6.0 Packaging Information
MCP3550/1/3
DS21950E-page 4 © 2009 Microchip Technology Inc.
Rejection Performance
(1,6)
Common Mode DC Rejection — -135 — dB V
CM
range from 0 to V
DD
Power Supply DC Rejection — -115 — dB
Common Mode 50/60 Hz Rejection CMRR — -135 — dB V
CM
varies from 0V to V
DD
Power Supply 50/60 Hz Rejection PSRR — -85 — dB MCP3551 only, V
DD
varies from
4.5V to 5.5V
Power Supply 50/60 Hz Rejection PSRR — -120 — dB MCP3550-50 or MCP3550-60 only
at 50 or 60 Hz respectively, V
DD
varies from 4.5V to 5.5V
Normal Mode 50 and 60 Hz
Rejection
NMRR — -85 — dB MCP3551 only,
0 < V
CM
< V
DD
,
-V
REF
< V
IN
= (V
IN
+ -V
IN
-) < +V
REF
Normal Mode 50 or 60 Hz
Rejection
NMRR — -120 — dB MCP3550-50 or MCP3550-60 only
at 50 or 60 Hz respectively,
0 < V
CM
< V
DD
,
-V
REF
< V
IN
= (V
IN
+ -V
IN
-) < +V
REF
Analog Inputs
Differential Input Range V
IN+
− V
IN-
-V
REF
—+V
REF
V
Absolute/Common Mode Voltages V
SS
- 0.3 — V
DD
+ 0.3 V
Analog Input Sampling Capacitor — 10 — pF Note 5
Differential Input Impedance — 2.4 — MΩ
Shutdown Mode Leakage Current — 1 — nA V
IN
+ = V
IN
- = V
DD
; CS = V
DD
(Note 3)
Reference Input
Voltage Range 0.1 — V
DD
V
Reference Input Sampling
Capacitor
—15— pFNote 5
Reference Input Impedance — 2.4 — MΩ Note 4
Shutdown Mode Reference
Leakage Current
—1— nAV
IN
+ = V
IN
- = V
SS
; CS = V
DD
Power Requirements
Power Supply Voltage Range V
DD
2.7 — 5.5 V
MCP3550-50, MCP3551 Supply
Current
I
DD
— 120 170 µA V
DD
= 5V
—100— µAV
DD
= 2.7V
MCP3550-60, MCP3553 Supply
Current
I
DD
— 140 185 µA V
DD
= 5V
—120— µAV
DD
= 2.7V
Supply Current, Sleep Mode I
DDSL
—10 µA
Supply Current, Shutdown Mode I
DDS
—— 1 µACS = SCK = V
DD
Serial Interface
Voltage Input High (CS
, SCK) V
IH
0.7 V
DD
—— V
Voltage Input Low (CS
, SCK) V
IL
——0.4 V
Voltage Output High (SDO/RDY
)V
OH
V
DD
- 0.5 — — V V
OH
= 1 mA, V
DD
= 5.0V
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all parameters apply at -40°C ≤ T
A
≤ +85°C, V
DD
= 2.7V or 5.0V.
V
REF
= 2.5V. V
IN
+ = V
IN
- = V
CM
= V
REF
/2. All ppm units use 2*V
REF
as full scale range. Unless otherwise noted, specification
applies to entire MCP3550/1/3 family.
Parameters Sym Min Typ Max Units Conditions
Note 1: This parameter is established by characterization and not 100% tested.
2: INL is the difference between the endpoints line and the measured code at the center of the quantization band.
3: This current is due to the leakage current and the current due to the offset voltage between V
IN
+ and V
IN
-.
4: Input impedance is inversely proportional to clock frequency; typical values are for the MCP3550/1 device. V
REF
=5V.
5: Characterized by design, but not tested.
6: Rejection performance depends on internal oscillator accuracy; see Section 4.0 “Device Overview” for more informa-
tion on oscillator and digital filter design. MCP3550/1 device rejection specifications characterized from 49 to 61 Hz.