MCP3424-E/SL Microchip Technology, MCP3424-E/SL Datasheet

IC ADC 18BIT 3.75SPS 4CH 14-SOIC

MCP3424-E/SL

Manufacturer Part Number
MCP3424-E/SL
Description
IC ADC 18BIT 3.75SPS 4CH 14-SOIC
Manufacturer
Microchip Technology
Datasheets

Specifications of MCP3424-E/SL

Package / Case
14-SOIC (0.154", 3.90mm Width)
Number Of Bits
18
Sampling Rate (per Second)
3.75
Data Interface
I²C, Serial
Number Of Converters
1
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Architecture
Delta-Sigma
Conversion Rate
0.00375 KSPs
Input Type
Voltage
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
MCP3424EV - EVALUATION BOARD FOR MCP3424
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

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Features
• 18-bit ΔΣ ADC with Differential Inputs:
• Differential Input Full Scale Range: -V
• Self Calibration of Internal Offset and Gain per
• On-Board Voltage Reference (V
• On-Board Programmable Gain Amplifier (PGA):
• INL: 10 ppm of Full Scale Range
• Programmable Data Rate Options:
• One-Shot or Continuous Conversion Options
• Low Current Consumption:
• On-Board Oscillator
• I
• Single Supply Operation: 2.7V to 5.5V
• Extended Temperature Range: -40°C to +125°C
Typical Applications
• Portable Instrumentation and Consumer Goods
• Temperature Sensing with RTD, Thermistor, and
• Bridge Sensing for Pressure, Strain, and Force
• Weigh Scales
• Battery Fuel Gauges
• Factory Automation Equipment
© 2009 Microchip Technology Inc.
- 2 channels: MCP3422 and MCP3423
- 4 channels: MCP3424
+V
Each Conversion
- Accuracy: 2.048V ± 0.05%
- Drift: 15 ppm/°C
- Gains of 1, 2, 4 or 8
- 3.75 SPS (18 bits)
- 15 SPS (16 bits)
- 60 SPS (14 bits)
- 240 SPS (12 bits)
- 135 µA typical
- 36 µA typical
- Standard, Fast and High Speed Modes
- User configurable two external address pins
Thermocouple
2
C
18-Bit, Multi-Channel ΔΣ Analog-to-Digital Converter with
(V
(V
for MCP3423 and MCP3424
REF
DD
DD
Interface:
= 3V, Continuous Conversion)
= 3V, One-Shot Conversion with 1 SPS)
I
2
C™ Interface and On-Board Reference
REF
):
REF
to
MCP3422/3/4
Description
The MCP3422, MCP3423 and MCP3424 devices
(MCP3422/3/4) are the low noise and high accuracy
18-Bit delta-sigma analog-to-digital (ΔΣ A/D) converter
family members of the MCP342X series from Microchip
Technology Inc. These devices can convert analog
inputs to digital codes with up to 18 bits of resolution.
The on-board 2.048V reference voltage enables an
input range of
range = 4.096V/PGA).
These devices can output analog-to-digital conversion
results at rates of 3.75, 15, 60, or 240 samples per
second
configuration bit settings using the two-wire I
interface.
calibrates offset and gain errors automatically. This
provides accurate conversion results from conversion
to conversion over variations in temperature and power
supply fluctuation.
The user can select the PGA gain of x1, x2, x4, or x8
before the analog-to-digital conversion takes place.
This allows the MCP3422/3/4 devices to convert a very
weak input signal with high resolution.
The MCP3422/3/4 devices have two conversion
modes: (a) One-Shot Conversion mode and (b)
Continuous Conversion mode. In One-Shot conversion
mode, the device performs a single conversion and
enters a low current standby mode automatically until it
receives another conversion command. This reduces
current consumption greatly during idle periods. In
Continuous conversion mode, the conversion takes
place continuously at the set conversion speed. The
device updates its output buffer with the most recent
conversion data.
The devices operate from a single 2.7V to 5.5V power
supply and have a two-wire I
interface for a standard (100 kHz), fast (400 kHz), or
high-speed (3.4 MHz) mode.
The I
are selected by using two external I
selection pins (Adr0 and Adr1). The user can configure
the device to one of eight available addresses by
connecting these two address selection pins to V
V
programmed at the factory during production.
SS
or float. The I
2
C address bits for the MCP3423 and MCP3424
depending
During
2
±
C address bits of the MCP3422 are
2.048V differentially (full scale
each
on
conversion,
the
2
C compatible serial
user
DS22088C-page 1
2
the
controllable
C address
2
C serial
device
DD
,

Related parts for MCP3424-E/SL

MCP3424-E/SL Summary of contents

Page 1

... MHz) mode. 2 The I C address bits for the MCP3423 and MCP3424 are selected by using two external I selection pins (Adr0 and Adr1). The user can configure the device to one of eight available addresses by ...

Page 2

... MCP3422/3/4 The MCP3422 and MCP3423 devices have two differential input channels and the MCP3424 has four- differential input channels. All electrical properties of these three devices are the same except the differences in the number of input channels and I address bit selection options. Package Types ...

Page 3

... Gain = 1,2, CH4+ CH4- © 2009 Microchip Technology Inc Voltage Reference (2.048V) V REF ΔΣ ADC PGA Converter Clock Oscillator MCP3424 Voltage Reference (2.048V) V REF ΔΣ ADC PGA Converter Clock Oscillator MCP3422/3/4 Adr1 Adr0 SCL Interface SDA Adr1 Adr0 SCL ...

Page 4

... MCP3422/3/4 NOTES: DS22088C-page 4 © 2009 Microchip Technology Inc. ...

Page 5

... Includes all errors from on-board PGA and V 7: This parameter is ensured by characterization and not 100% tested. 8: MCP3423 and MCP3424 only. 9: Addr_Float voltage is applied at address pin. 10: No voltage is applied at address pin (left “floating”). © 2009 Microchip Technology Inc. †Notice: Stresses above those listed under “Maximum Rat- ings” ...

Page 6

... INL is the difference between the endpoints line and the measured code at the center of the quantization band. 6: Includes all errors from on-board PGA and V 7: This parameter is ensured by characterization and not 100% tested. 8: MCP3423 and MCP3424 only. 9: Addr_Float voltage is applied at address pin. 10: No voltage is applied at address pin (left “floating”). DS22088C-page 6 = -40°C to +85° differential full scale range ...

Page 7

... Storage Temperature Range Thermal Package Resistances Thermal Resistance, 8L-DFN (2x3) Thermal Resistance, 8L-MSOP Thermal Resistance, 8L-SOIC Thermal Resistance, 10L-DFN (3x3) Thermal Resistance, 10L-MSOP Thermal Resistance, 14L-SOIC Thermal Resistance, 14L-TSSOP © 2009 Microchip Technology Inc -40°C to +125° Sym Min Typ Max ...

Page 8

... MCP3422/3/4 NOTES: DS22088C-page 8 © 2009 Microchip Technology Inc. ...

Page 9

... Temperature ( C) FIGURE 2-2: INL vs. Temperature PGA = 8 5 PGA = -10 PGA = 2 -15 -20 -60 -40 - 100 120 140 Temperature (°C) FIGURE 2-3: Offset Error vs. Temperature. © 2009 Microchip Technology Inc. = +5.0V 0V, CHn+ = CHn +25° PGA = 5.5 -100 -75 FIGURE 2-4: Voltage. 2 PGA = 1 1.5 PGA = ...

Page 10

... V = 2.7V DD -110 -120 0.1 0.1 FIGURE 2-11: /2, REF 100 120 140 Temperature (°C) Oscillator Drift vs. Data Rate = 3.75 SPS 1 10 100 1000 10000 1 10 100 1k 10k Input Signal Frequency (Hz) Frequency Response. © 2009 Microchip Technology Inc. ...

Page 11

... D and D are the ESD diodes the differential input sampling capacitor. SAMPLE © 2009 Microchip Technology Inc. Table 3-1. MCP3424 Sym SOIC, TSSOP 1 CH1+ Positive Differential Analog Input Pin of Channel 1 2 CH1- Negative Differential Analog Input Pin of Channel 1 3 CH2+ ...

Page 12

... There is an internal electrical connection between the Exposed Thermal Pad (EP) and the V be connected to the same potential on the Printed Circuit Board (PCB). Sampling Switch SAMPLE (3.2 pF interface. The SDA line to the SDA pin. Except for pin; they must SS © 2009 Microchip Technology Inc. ...

Page 13

... A 0.1 µF decoupling capacitor should be mounted as close as possible to the V for additional transient immunity. © 2009 Microchip Technology Inc. The threshold voltage is set at 2.2V with a tolerance of approximately ±5%. If the supply voltage falls below this threshold, the device will be held in a reset condition ...

Page 14

... Self-Calibration The device performs a self-calibration of offset and gain for each conversion. This provides reliable conversion results from conversion-to-conversion over variations in temperature as well as power supply fluctuations. Ω Z (f) = 2.25 M /PGA IN 2-11) may not give enough © 2009 Microchip Technology Inc. ...

Page 15

... Where Resolution, which is programmed in the Configuration Register. © 2009 Microchip Technology Inc. Table 4-1 shows the LSB size of each conversion rate setting. The measured unknown input voltage is obtained by multiplying the output codes with LSB. See the following section for the input voltage calculation using the output codes ...

Page 16

... CODES TO INPUT VOLTAGE LSB • ----------- - = (Output Code) PGA LSB • ′ ----------- - s complement of Output Code) PGA = See Table 4-1 = 1’s complement + +0)x LSB(15.625μV)/PGA 0 )x LSB(15.625μV)/PGA 0 )x LSB(15.625μV)/PGA 1 +0)x LSB(15.625μV)/PGA © 2009 Microchip Technology Inc. ...

Page 17

... RDY bit = 1 means the conversion result is not updated since the last reading. A new conversion is under processing and the RDY bit will be cleared when the new conversion result is ready © 2009 Microchip Technology Inc. 5.1.2 ONE-SHOT CONVERSION MODE (O/C BIT = Once the One-Shot Conversion Mode (single conver- ...

Page 18

... Select Channel Select Channel 3 (MCP3424 only, treated as “00” by the MCP3422/MCP3423 Select Channel 4 (MCP3424 only, treated as “01” by the MCP3422/MCP3423) bit 4 O/C: Conversion Mode Bit 1 = Continuous Conversion Mode (Default). The device performs data conversions continuously 0 = One-Shot Conversion Mode. The device performs a single conversion and enters a low power ...

Page 19

... The I C address bits (A2, A1, A0 bits) for the MCP3423 and MCP3424 are user configurable and determined by the logic status of the two external address selection pins on the user’s application board (Adr0 and Adr1 pins). The Master must know the Adr0 and Adr1 pin conditions before sending read or write command ...

Page 20

... DEVICE ADDRESS BITS (A2, A1, A0) AND ADDRESS SELECTION PINS ( AND MCP3423 MCP3424 The MCP3423 and MCP3424 have two external device address pins (Adr1, Adr0). These pins can be set to a logic high (or tied low (or tied left floating (not connected to anything, or tied to V /2), These combinations of logic level using the DD two pins allow eight possible addresses ...

Page 21

... TABLE 5-3: ADDRESS BITS VS. ADDRESS SELECTION PINS FOR (MCP3423 AND MCP3424 ONLY) (NOTES Device Logic Status of Address Address Bits Selection Pins Adr0 Pin 0 (Addr_Low (Addr_Low (Addr_Low (Addr_High (Addr_High (Addr_High Float Float Float Note 1: Float: (a) Leave pin without connecting to anything (left floating), or (b) apply Addr_Float voltage ...

Page 22

... Master may read the configuration byte to check the RDY bit condition.The Master may continuously send clock (SCL) to repeatedly read the configuration byte (to check the RDY bit status). Figures 5-4 and 5-5 show the timing diagrams of the reading. Digital Output Codes © 2009 Microchip Technology Inc. ...

Page 23

... FIGURE 5-4: Timing Diagram For Reading From The MCP3422/3/4 With 18-Bit Mode. © 2009 Microchip Technology Inc. MCP3422/3/4 DS22088C-page 23 ...

Page 24

... MCP3422/3/4 FIGURE 5-5: Timing Diagram For Reading From The MCP3422/3/4 With 12-Bit to 16-Bit Modes. DS22088C-page 24 © 2009 Microchip Technology Inc. ...

Page 25

... Latch the logic status of external address selection pins (Adr0 and Adr1 pins). 5.4.2 GENERAL CALL LATCH (MCP3423 AND MCP3424) The general call latch occurs if the second byte is ‘00000100’ (04h). The device will latch the logic status of the external address selection pins (Adr0 and Adr1 pins), but will not perform a reset ...

Page 26

... START condition. the Master The non-acknowledgement (NAK) is issued by providing the SDA line to “HIGH” during the 9th clock pulse. (D) (D) ADDRESS OR DATA ACKNOWLEDGE ALLOWED VALID TO CHANGE 2 C Serial Bus. SDA line to allow the Master (C) (A) STOP CONDITION © 2009 Microchip Technology Inc. ...

Page 27

... If this parameter is too short, it can create an unintended Start or Stop condition to other devices on the bus line. If this parameter is too long, Clock Low time (T 4: For Data Input: If this parameter is too long, the Data Input Setup (T For Data Output: This parameter is characterized, and tested indirectly by testing T © 2009 Microchip Technology Inc. = -40 to +85° Min Typ ...

Page 28

... MHz b SCL ns From 400 pF 1.7 MHz b SCL 100 pF 3.4 MHz b SCL 400 pF 1.7 MHz b SCL 100 pF 3.4 MHz b SCL 400 pF 1.7 MHz b SCL ns After this period, the first clock pulse is generated HD:DAT ) can be affected. LOW parameter. AA © 2009 Microchip Technology Inc. ...

Page 29

... SU:STA SCL T LOW T SDA HD:STA FIGURE 5- Bus Timing Data. © 2009 Microchip Technology Inc. T HIGH T SU:DAT T HD:DAT T AA MCP3422/3 SU:STO T BUF 0.7V DD 0.3V DD DS22088C-page 29 ...

Page 30

... MCP3422/3/4 NOTES: DS22088C-page 30 © 2009 Microchip Technology Inc. ...

Page 31

... MCP3422/3/4 devices. Figure 6-1 an example of using two bypass capacitors (a 10 µF tantalum capacitor and a 0.1 µF ceramic capacitor) on the V line of the MCP3424. These capacitors are DD helpful to filter out any high frequency noises on the V line and also provide the momentary bursts of DD extra currents when the device needs from the supply ...

Page 32

... Differential Input Signal Connection: Excitation 9 Stop Bit (b) Single-ended Input Signal Connection: R/W MCP342X Excitation Response Sensor FIGURE 6-4: Ended Input Connections. Sensor CHn+ Input Signal CHn- MCP342X R 1 CHn+ Input Signal R 2 CHn- MCP342X Differential and Single- © 2009 Microchip Technology Inc. ...

Page 33

... FIGURE 6-5: Battery Voltage and Charging/Discharging Current Measurement. © 2009 Microchip Technology Inc. For the current measurement, the device measure the voltage across the current sensor, and converts it by dividing the measured voltage by a known resistance value. The voltage drops across the sensor is waste. ...

Page 34

... PGA = 8 settings. With this configuration, MCP3424 can detect the input signal level as low as approximately 2 µV. The internal PGA boosts the input signal level eight times. The 40 µV/°C input from the thermocouple is amplified internally to 320 µV/°C before the conversion takes place. This results in 20.48 LSB/° ...

Page 35

... NPP 301 (manufactured by GE NovaSensor), and temperature is measured by a thermistor. The pressure sensor output is 20 mV/V. This gives 100 mV of full scale output for V DD © 2009 Microchip Technology Inc. ⎞ ⎟ ⎟ μ V ⎠ MCP3424 CH1+ 1 CH4- 14 CH1- 2 CH4 CH2+ 12 ...

Page 36

... The thermistor sensor is simple to use and widely used for the temperature measurement applications. It has both linear and non-linear responses over temperature range used to adjust the linear region of interest 1 for measurement. DS22088C-page 36 ⎞ ⎟ ⎟ μ V ⎠ PGA temperature ) 2 © 2009 Microchip Technology Inc. ...

Page 37

... MCP3424 Evaluation Board. FIGURE 7-3: Example of PICkit™ Serial User Interface. © 2009 Microchip Technology Inc. MCP3422/3/4 Analog Input MCP3424 Evaluation Board FIGURE 7-2: Setup for the MCP3424 Evaluation Board with PICkit™ Serial Analyzer. DS22088C-page 37 USB Cable to PC PICkit Serial ...

Page 38

... MCP3422/3/4 NOTES: DS22088C-page 38 © 2009 Microchip Technology Inc. ...

Page 39

... Note: 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. MCP3422/3/4 Example: AGM 929 ...

Page 40

... MCP3422/3/4 Package Marking Information (Continued) 10-Lead DFN (3x3) (MCP3423 XXXX 2 9 XYWW 3 8 NNN 10-Lead MSOP (MCP3423) XXXXXX YWWNNN 14-Lead SOIC (150 mil) (MCP3424) XXXXXXXXXXX XXXXXXXXXXX YYWWNNN 14-Lead TSSOP (4.4 mm) (MCP3424) XXXXXXXX YYWW NNN DS22088C-page 40 Example 3423 2 9 0929 3 8 256 ...

Page 41

... Microchip Technology Inc. MCP3422/3/4 DS22088C-page 41 ...

Page 42

... MCP3422/3/4 DS22088C-page 42 © 2009 Microchip Technology Inc. ...

Page 43

... Microchip Technology Inc. MCP3422/3/4 I φ DS22088C-page 43 ...

Page 44

... MCP3422/3/4 DS22088C-page 44 α φ β © 2009 Microchip Technology Inc. ...

Page 45

... Microchip Technology Inc. MCP3422/3/4 DS22088C-page 45 ...

Page 46

... MCP3422/3/4 DS22088C-page 46 © 2009 Microchip Technology Inc. ...

Page 47

... Microchip Technology Inc. MCP3422/3/4 DS22088C-page 47 ...

Page 48

... MCP3422/3/4 DS22088C-page 48 I © 2009 Microchip Technology Inc. φ ...

Page 49

... Microchip Technology Inc. MCP3422/3/4 φ β α DS22088C-page 49 ...

Page 50

... MCP3422/3/4 DS22088C-page 50 © 2009 Microchip Technology Inc. ...

Page 51

... Microchip Technology Inc. MCP3422/3/4 I φ DS22088C-page 51 ...

Page 52

... MCP3422/3/4 NOTES: DS22088C-page 52 © 2009 Microchip Technology Inc. ...

Page 53

... Added new package marking information and package outline drawings for MCP3422 and MCP3423 devices. 3. Added MCP3422 and MCP3423 devices to Product Identification System page. Revision A (June 2008) • Original Release of this Document. © 2009 Microchip Technology Inc. MCP3422/3/4 DS22088C-page 53 ...

Page 54

... MCP3422/3/4 NOTES: DS22088C-page 54 © 2009 Microchip Technology Inc. ...

Page 55

... MCP3423T-E/MF MCP3423-E/UN MCP3423T-E/UN MCP3424 MCP3424-E/SL MCP3424T-E/SL: c) MCP3424-E/ST: d) MCP3424T-E/ST: MCP3422/3 Address Option, 8LD DFN package. 2-Channel ADC, A0 Address Option, 8LD DFN package. A0 Address Option, 8LD MSOP package. 2-Channel ADC, A0 Address Option, 8LD MSOP package. A0 Address Option, 8LD SOIC package. 2-Channel ADC, A0 Address Option, 8LD SOIC package ...

Page 56

... MCP3422/3/4 NOTES: DS22088C-page 56 © 2009 Microchip Technology Inc. ...

Page 57

... REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, 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 58

... 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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