MCP3550-50E/MS Microchip Technology, MCP3550-50E/MS Datasheet

IC ADC 22BIT 2.7V 1CH 8MSOP

MCP3550-50E/MS

Manufacturer Part Number
MCP3550-50E/MS
Description
IC ADC 22BIT 2.7V 1CH 8MSOP
Manufacturer
Microchip Technology
Datasheets

Specifications of MCP3550-50E/MS

Data Interface
Serial, SPI™
Number Of Bits
22
Sampling Rate (per Second)
12.5
Number Of Converters
1
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Resolution (bits)
22bit
Sampling Rate
12.5SPS
Input Channel Type
Differential
Supply Voltage Range - Analog
2.7V To 5.5V
Supply Current
120µA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
MCP355XDV-MS1 - BOARD DEV SENSOR APP MCP355XMCP355XDM-TAS - BOARD DEMO TINY APP SNSR MCP355X
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Features
• 22-bit ADC in Small 8-pin MSOP Package with
• Low-Output Noise of 2.5 µV
• 3 µV Typical Offset Error
• 2 ppm Typical Full Scale Error
• 6 ppm Maximum INL Error
• Total Unadjusted Error Less Than 10 ppm
• No Digital Filter Settling Time, Single-Command
• Ultra-Low Conversion Current (MCP3550/1):
• Differential Input with V
• 2.7V to 5.5V Single-Supply Operation
• Extended Temperature Range:
Applications
• Weigh Scales
• Direct Temperature Measurement
• 6-digit DVMs
• Instrumentation
• Data Acquisition
• Strain Gauge Measurement
Block Diagram
© 2009 Microchip Technology Inc.
V
V
Automatic Internal Offset and Gain Calibration
Resolution of 21.9 bits (MCP3550/1)
Conversions through 3-wire SPI Interface
- 100 µA typical (V
- 120 µA typical (V
Range
- -40°C to +125°C
IN
IN
+
-
Low-Power, Single-Channel 22-Bit Delta-Sigma ADCs
V
REF
3rd-Order
DS ADC
Modulator
w/ Internal
Calibration
Oscillator
Internal
DD
DD
= 2.7V)
= 5.0V)
SS
to V
RMS
DD
POR
V
V
with Effective
SS
DD
Common Mode
V
DD
SCK
SDO
RDY
CS
MCP3550/1/3
Description
The Microchip Technology Inc. MCP3550/1/3 devices
are 2.7V to 5.5V low-power, 22-bit Delta-Sigma
Analog-to-Digital Converters (ADCs). The devices offer
output noise as low as 2.5 µV
unadjusted error of 10 ppm. The family exhibits 6 ppm
Integral Non-Linearity (INL) error, 3 µV offset error and
less than 2 ppm full scale error. The MCP3550/1/3
devices provide high accuracy and low noise
performance
measurements (such as pressure, temperature and
humidity) are performed. With the internal oscillator
and
components
applications.
This product line has fully differential analog inputs,
making it compatible with a wide variety of sensor,
industrial control or process control applications.
The MCP3550/1/3 devices operate from -40°C to
+125°C and are available in the space-saving 8-pin
MSOP and SOIC packages.
Package Types:
high
V
V
V
V
REF
IN
IN
SS
oversampling
+
are
for
1
2
3
4
MCP3550/1/3
MSOP, SOIC
applications
required
rate,
8
7
6
5 SCK
for
V
CS
SDO/RDY
RMS
minimal
DD
DS21950E-page 1
where
, with a total
high-accuracy
external
sensor

Related parts for MCP3550-50E/MS

MCP3550-50E/MS Summary of contents

Page 1

... The family exhibits 6 ppm Integral Non-Linearity (INL) error, 3 µV offset error and less than 2 ppm full scale error. The MCP3550/1/3 devices provide high accuracy and low noise performance measurements (such as pressure, temperature and humidity) are performed ...

Page 2

... MCP3550/1/3 NOTES: DS21950E-page 2 © 2009 Microchip Technology Inc. ...

Page 3

... 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 Hz. © 2009 Microchip Technology Inc. † Notice: Stresses above those listed under "Maximum Ratings" ...

Page 4

... 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 Hz. DS21950E-page 4 as full scale range. Unless otherwise noted, specification ...

Page 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 Hz. TEMPERATURE CHARACTERISTICS Electrical Specifications: Unless otherwise indicated Parameters Sym ...

Page 6

... MCP3550/1/3 t RDY t CSD t CS CSL SDO /RDY SCK SU FIGURE 1-1: Serial Timing FIGURE 1-2: Power-up Timing. DS21950E-page 6 f SCK PUCSL t CSHSD t DIS © 2009 Microchip Technology Inc. ...

Page 7

... In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. Note: Unless otherwise specified +25° All ppm units use 2*V as full scale range. Unless otherwise noted, graphs apply to entire MCP3550/1/3 family. REF 5 4 +125 C 3 ...

Page 8

... MCP3550/1/3 Note: Unless otherwise specified +25° All ppm units use 2*V as full scale range. Unless otherwise noted, graphs apply to entire MCP3550/1/3 family. REF 15 10 MCP3553 5 MCP3550/1 0 -2.5 -1.5 -0.5 0.5 V (V) IN FIGURE 2-7: Output Noise vs. Input Voltage (V = 5.0V 10.0 9.0 8.0 7 ...

Page 9

... Negative Full Scale - -10 -50 - Temperature (°C) FIGURE 2-15: Full Scale Error vs. Temperature (V = 5.0V). REF © 2009 Microchip Technology Inc 2.5V 0V REF SS Unless otherwise noted, graphs apply to entire MCP3550/1/3 family. 4000 3500 V = 2.5V REF V = 1.25V 3000 25C 2500 A 16384 2000 consecutiv e readings ...

Page 10

... Total Unadjusted Error (TUE) vs. Input Voltage (V = 5.0V). REF (V) REF FIGURE 2-21: Maximum TUE vs. V DS21950E-page 2.5V 0V REF SS . Unless otherwise noted, graphs apply to entire MCP3550/1/3 family -50 -25 1.5 2 2.5 FIGURE 2-22: Temperature. 5 4.5 4 3.5 3 2.5 2 1 2.5 FIGURE 2-23: 0.6 ...

Page 11

... Note: Unless otherwise specified +25° All ppm units use 2*V as full scale range. Unless otherwise noted, graphs apply to entire MCP3550/1/3 family. REF 200 180 160 MCP3550-60, MCP3553 140 120 MCP3550-50, MCP3550/1 100 2.5 3 3.5 4 4.5 V (V) DD FIGURE 2-25 © 2009 Microchip Technology Inc. ...

Page 12

... MCP3550/1/3 NOTES: DS21950E-page 12 © 2009 Microchip Technology Inc. ...

Page 13

... V input pin. current return path for both analog and digital circuitry REF of the MCP3550/1/ analog ground plane is available recommended that this device be tied to the analog ground plane of the Printed Circuit Board (PCB 3.4 ...

Page 14

... MCP3550/1/3 3.6 Chip Select (CS) CS gates all communication to the device and can be used to select multiple devices that share the same SCK and SDO/RDY pins. This pin is also used to control the internal conversions, which begin on the falling edge of CS. Raising CS before the first internal conversion is complete places the device in Single Conversion mode ...

Page 15

... Calibration FIGURE 4-1: MCP3550/1/3 Functional Block Diagram. © 2009 Microchip Technology Inc. The MCP3550/1/3 devices communicate with a simple 3-wire SPI interface. The interface controls the conversion start event, with an added feature of an auto-conversion at system power-up by tying the CS pin to logic-low. The device can communicate with bus speeds MHz, with 50 pF capacitive loading ...

Page 16

... The bit stream output of the modulator is then processed by the digital decimation filter in order to provide a 22-bit output code at a data rate of 12.5 Hz for the MCP3550-50 for the MCP3550-60, 13.75 Hz for the MCP3551 and 60 Hz for the MCP3553. Since the oversampling ratio is lower ...

Page 17

... The internal oscillator frequency is 102.4 kHz ±1% for the MCP3550-50, 112.64 kHz ±1% for the MCP3551, and 122.88 kHz ±1% for the MCP3550-60 and MCP3553 devices, across the full power supply voltage and specified temperature ranges. ...

Page 18

... The threshold voltage is set at 2.2V, with a tolerance of approximately ±5%. If the supply voltage falls below this threshold, the MCP3550/1/3 devices will be held in a reset condition or in Shutdown mode. When the part is in Shutdown mode, the power consumption is less than 1 µA. The typical hysteresis value is around 200 mV in order to prevent reset during brown-out or other glitches on the power supply ...

Page 19

... Shutdown Mode When not internally converting, the two modes of operation for the MCP3550/1/3 devices are the Shutdown and Sleep modes. During Shutdown mode, all internal analog circuitry, including the POR, is turned off and the device consumes less than 1 µA. When exiting Shutdown mode, the device must require additional time before a conversion can take place ...

Page 20

... MCP3550/1/3 NOTES: DS21950E-page 20 © 2009 Microchip Technology Inc. ...

Page 21

... SERIAL INTERFACE 5.1 Overview Serial communication between the microcontroller and the MCP3550/1/3 devices is achieved using CS, SCK and SDO/RDY. There are two modes of operation: Single Conversion and Continuous Conversion. CS controls the conversion start. There are 24 bits in the data word: 22 bits of conversion data and two overflow bits ...

Page 22

... CONV settled completely and there is no latency involved with the digital SINC filter of the MCP3550/1/3. The two modes of conversion for the MCP3550/1/3 devices are Single Conversion and Continuous Conversion. In Single Conversion mode, a consecutive conversion will not automatically begin. Instead, after a ...

Page 23

... CONV Hi-Z SDO/RDY FIGURE 5-4: RDY Functionality in Single Conversion Mode. © 2009 Microchip Technology Inc. MCP3550/1/3 5.4 Continuous Conversion Mode , If no rising edge of CS occurs during any given CONV conversion per Figure will take place and the contents of the previous conver- sion will be overwritten ...

Page 24

... CONTINUOUS CONVERSION OPERATION, (CS TIED PERMANENTLY LOW possible to use only two wires to communicate with and the MCP3550/1/3 devices. In this state, the device is CONV always in Continuous Conversion mode, with internal conversions continuously occurring. This mode can be entered by having CS low during power-up or changing low position after power-up ...

Page 25

... Figure 5-7 shows the similar case of SPI Mode 0,0, where the clock idles in the Low state. The waveforms in the figures are examples of an MCU operating the SPI port in 8-bit mode, and the MCP3550/1/3 devices do not require data in 8-bit groups. CS SCK ...

Page 26

... MCP3550/1/3 NOTES: DS21950E-page 26 © 2009 Microchip Technology Inc. ...

Page 27

... In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. © 2009 Microchip Technology Inc. MCP3550/1/3 Example: 3553E 951256 Example (MCP3550): 3550-50E SN^^ 0951 e 3 256 Example (MCP3551): MCP3551E ...

Page 28

... MCP3550/1/3 /HDG 3ODVWLF 0LFUR 6PDOO 2XWOLQH 3DFNDJH 06 >0623@ 1RWH 1RWHV DS21950E-page 28 I © 2009 Microchip Technology Inc. φ ...

Page 29

... Microchip Technology Inc. MCP3550/1/3 PP %RG\ >62,&@ α φ β DS21950E-page 29 ...

Page 30

... MCP3550/1/3 /HDG 3ODVWLF 6PDOO 2XWOLQH 61 ± 1DUURZ 1RWH DS21950E-page 30 PP %RG\ >62,&@ © 2009 Microchip Technology Inc. ...

Page 31

... The following is the list of modifications: • This update includes revisions to the packaging diagrams. Revision C (December 2005) The following is the list of modifications: • Added MCP3550-50, MCP3550-60 references throughout this document. Revision B (October 2005) The following is the list of modifications: • Changed LSb refefences to LSB. ...

Page 32

... MCP3550/1/3 NOTES: DS21950E-page 32 © 2009 Microchip Technology Inc. ...

Page 33

... Single Channel 22-Bit Delta-Sigma ADC (Tape and Reel) Temperature Range -40°C to +125°C Package Plastic MSOP, 8-lead SN = Plastic SOIC (150 mil Body), 8-lead © 2009 Microchip Technology Inc. /XX Examples: a) MCP3550-50E/MS: Extended Temp., Package b) MCP3550T-50E/MS: Tape and Reel, c) MCP3550-60E/SN: d) MCP3550T-60E/SN: Tape and Reel, a) MCP3551-E/MS: b) ...

Page 34

... MCP3550/1/3 NOTES: DS21950E-page 34 © 2009 Microchip Technology Inc. ...

Page 35

... PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total Endurance, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...

Page 36

... Fax: 886-3-6578-370 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 © 2009 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 ...

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