MCP3208-CI/SN Microchip Technology, MCP3208-CI/SN Datasheet

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MCP3208-CI/SN

Manufacturer Part Number
MCP3208-CI/SN
Description
2.7V 4-Channel/8-Channel 10-Bit A/D Converters with SPI Serial Interface
Manufacturer
Microchip Technology
Datasheet
Features
• 12-bit resolution
• ± 1 LSB max DNL
• ± 1 LSB max INL (MCP3204/3208-B)
• ± 2 LSB max INL (MCP3204/3208-C)
• 4 (MCP3204) or 8 (MCP3208) input channels
• Analog inputs programmable as single-ended or
• On-chip sample and hold
• SPI serial interface (modes 0,0 and 1,1)
• Single supply operation: 2.7V - 5.5V
• 100 ksps max. sampling rate at V
• 50 ksps max. sampling rate at V
• Low power CMOS technology:
• Industrial temp range: -40°C to +85°C
• Available in PDIP, SOIC and TSSOP packages
Applications
• Sensor Interface
• Process Control
• Data Acquisition
• Battery Operated Systems
Package Types
M
PDIP, SOIC, TSSOP
PDIP, SOIC
pseudo-differential pairs
- 500 nA typical standby current, 2 µA max.
- 400 µA max. active current at 5V
2002 Microchip Technology Inc.
2.7V 4-Channel/8-Channel 12-Bit A/D Converters
DGND
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH0
CH1
CH2
CH3
NC
NC
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
16
15
14
13
12
10
11
14
13
12
10
11
9
9
8
V
V
AGND
CLK
D
D
CS/SHDN
DGND
V
V
AGND
CLK
D
D
CS/SHDN
DD
REF
OUT
IN
DD
REF
with SPI
OUT
IN
DD
DD
= 2.7V
= 5V
Serial Interface
MCP3204/3208
Description
The
devices are successive approximation 12-bit Analog-
to-Digital (A/D) Converters with on-board sample and
hold circuitry. The MCP3204 is programmable to pro-
vide two pseudo-differential input pairs or four single-
ended inputs. The MCP3208 is programmable to pro-
vide four pseudo-differential input pairs or eight single-
ended inputs. Differential Nonlinearity (DNL) is speci-
fied at ±1 LSB, while Integral Nonlinearity (INL) is
offered in ±1 LSB (MCP3204/3208-B) and ±2 LSB
(MCP3204/3208-C) versions.
Communication with the devices is accomplished using
a simple serial interface compatible with the SPI proto-
col. The devices are capable of conversion rates of up
to 100 ksps. The MCP3204/3208 devices operate over
a broad voltage range (2.7V - 5.5V). Low current
design permits operation with typical standby and
active currents of only 500 nA and 320 µA, respec-
tively. The MCP3204 is offered in 14-pin PDIP, 150 mil
SOIC and TSSOP packages. The MCP3208 is offered
in 16-pin PDIP and SOIC packages.
Functional Block Diagram
CH7*
CH0
CH1
Microchip
* Note: Channels 5-7 available on MCP3208 Only
Channel
Input
Mux
Sample
Hold
and
Technology
CS/SHDN
Control Logic
V
DAC
REF
D
Comparator
IN
Inc.
CLK
DS21298C-page 1
MCP3204/3208
12-Bit SAR
Register
V
Shift
D
DD
OUT
V
SS

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MCP3208-CI/SN Summary of contents

Page 1

... The MCP3204 is offered in 14-pin PDIP, 150 mil SOIC and TSSOP packages. The MCP3208 is offered in 16-pin PDIP and SOIC packages. Functional Block Diagram CH0 CH1 Channel CH7* * Note: Channels 5-7 available on MCP3208 Only Technology Inc. MCP3204/3208 ...

Page 2

... LSB — -82 — — 72 — — 86 — 0.25 — Note 2 DD — 100 150 µA — 0.001 3.0 µ levels. REF Function = 0V 5V, SS REF Conditions = REF = V = 2.7V REF = 0.1V to 4.9V@1 kHz = 0.1V to 4.9V@1 kHz = 0.1V to 4.9V@1 kHz = 5V DD 2002 Microchip Technology Inc. ...

Page 3

... See graphs that relate linearity performance Because the sample cap will eventually lose charge, effective clock rates below 10 kHz can affect linearity performance, particularly at elevated temperatures. See Section 6.2, “Maintaining Minimum Clock Speed”, for more information. 2002 Microchip Technology Inc. = 20*f CLK SAMPLE ...

Page 4

... REF Null Bit MSB OUT = 5V 0V 5V, SS REF Conditions t CSH DIS LSB 2002 Microchip Technology Inc. ...

Page 5

... L Voltage Waveforms for OUT Voltage Waveforms for t DO CLK OUT FIGURE 1-2: Load Circuit for t 2002 Microchip Technology Inc. Test Point D OUT Voltage Waveforms for CLK D OUT Voltage Waveforms for OUT R ...

Page 6

... Positive INL Negative INL Sample Rate (ksps) Integral Nonlinearity (INL) = 2.7V). DD Positive INL Negative INL 0.5 1.0 1.5 2.0 2.5 3.0 VREF (V) Integral Nonlinearity (INL) = 2.7V 2.7 V REF = 50 ksps 512 1024 1536 2048 2560 3072 3584 4096 Digital Code Integral Nonlinearity (INL) = 2.7V). DD 2002 Microchip Technology Inc. ...

Page 7

... Sample Rate (ksps) FIGURE 2-8: Differential Nonlinearity (DNL) vs. Sample Rate. 3.0 2.0 1.0 Positive DNL 0.0 Negative DNL -1.0 -2.0 -3 VREF (V) FIGURE 2-9: Differential Nonlinearity (DNL) vs REF 2002 Microchip Technology Inc 100 ksps, f REF SS SAMPLE 1 0.8 F SAMPLE 0.6 0.4 0.2 0.0 -0.2 -0.4 -0.6 -0.8 -1.0 -50 75 100 FIGURE 2-10: vs ...

Page 8

... Digital Code Differential Nonlinearity = DD = 2.7 V REF = 50 ksps Positive DNL Negative DNL - 100 Temperature (°C) Differential Nonlinearity = 2.7V REF F = 100 ksps SAMPLE 2.7V DD REF ksps SAMPLE (V) REF Offset Error vs REF 2002 Microchip Technology Inc. ...

Page 9

... 2.7V DD REF - ksps SAMPLE -50 -60 -70 - -90 F SAMPLE -100 1 10 Input Frequency (kHz) FIGURE 2-21: Total Harmonic Distortion (THD) vs. Input Frequency. 2002 Microchip Technology Inc 5V 0V 100 ksps, f REF SS SAMPLE 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -50 75 100 FIGURE 2-22: Temperature. 100 = 5 V REF 90 ...

Page 10

... SAMPLE 10 100 Input Frequency (kHz) Effective Number of Bits 10 100 1000 10000 Ripple Frequency (kHz) Power Supply Rejection 2 REF ksps SAMPLE F = 998.76 Hz INPUT 4096 points 5000 10000 15000 20000 25000 Frequency (Hz) Frequency Spectrum of = 2.7V). DD 2002 Microchip Technology Inc. ...

Page 11

... CLK 300 250 200 2 REF 150 MHz CLK 100 50 0 -50 - Temperature (°C) FIGURE 2-33: I vs. Temperature. DD 2002 Microchip Technology Inc 5V 0V 100 ksps, f REF SS SAMPLE 100 REF 90 All points REF 5.0 5 ...

Page 12

... Temperature (°C) FIGURE 2-38: I vs. Temperature. DDS DS21298C-page 5V 0V 100 ksps, f REF SS SAMPLE 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 5.0 5.5 6.0 -50 FIGURE 2-39: Current vs. Temperature. 75 100 = 20 25°C. CLK SAMPLE REF MHz CLK - 100 Temperature (°C) Analog Input Leakage 2002 Microchip Technology Inc. ...

Page 13

... The MCP3204 can be configured to provide two pseudo-differential input pairs or four single-ended inputs, while the MCP3208 can be configured to provide four pseudo-differential input pairs or eight single-ended inputs. Configuration is done as part of the serial command before each con- version begins ...

Page 14

... Sampling Switch LEAKAGE V = 0.6V T ± Leakage Current At The Pin I leakage Due To Various Junctions SS = Sampling switch = Sampling switch resistor Sample/hold capacitance C sample 10000 4096 V IN -------------------------- - = V REF = reference voltage SAMPLE = DAC capacitance = 2002 Microchip Technology Inc. ...

Page 15

... D1 and D2) are used to select the input channel configuration. Table 5-1 and Table 5-2 show the configuration bits for the MCP3204 and MCP3208, respectively. The device will begin to sample the ana- log input on the fourth rising edge of the clock after the start bit has been received ...

Page 16

... During this time, the bias circuit and the comparator power down while the reference input becomes a DATA high impedance node, leaving the CLK running to clock out LSB first data or zeroes. FIGURE 5-2: Communication with MCP3204 or MCP3208 in LSB First Format. DS21298C-page 16 t CYC Don’ ...

Page 17

... Figure 6-2 shows the same thing in SPI Mode 1,1, which requires that the clock idles in the high state. As with mode 0,0, the A/D converter outputs data on the falling edge of the clock and the MCU latches data from the A/D converter in on the rising edge of the clock. 2002 Microchip Technology Inc. MCP3204/3208 DS21298C-page 17 ...

Page 18

... Data stored into MCU receive register after transmission of last 8 bits Don’t Care Data stored into MCU receive register after transmission of last 8 bits 2002 Microchip Technology Inc. ...

Page 19

... C FIGURE 6-3: The MCP601 Operational Amplifier is used to implement a second order anti-aliasing filter for the signal being converted by the MCP3204. 2002 Microchip Technology Inc. 6.3 Buffering/Filtering the Analog Inputs If the signal source for the A/D converter is not a low impedance source, it will have to be buffered or inaccu- rate conversion results may occur (see Figure 4-2) ...

Page 20

... Interface -Shift Register -Control Logic Device 4 FIGURE 6-5: Digital Ground Pins. on the board ground plane MCP3204/08 Analog Side -Sample Cap -Capacitor Array -Comparator Substrate DGND AGND 0.1 µF Analog Ground Plane Separation of Analog and 2002 Microchip Technology Inc. ...

Page 21

... Standard marking consists of Microchip part number, year code, week code, traceability code (facility code, mask rev#, and assembly code). For marking beyond this, certain price adders apply. Please check with your Microchip Sales Office. 2002 Microchip Technology Inc. MCP3204/3208 Example: MCP3204-B ...

Page 22

... MCP3204/3208 Package Marking Information (Continued) 16-Lead PDIP (300 mil) (MCP3304) XXXXXXXXXXXXXX XXXXXXXXXXXXXX YYWWNNN 16-Lead SOIC (150 mil) (MCP3304) XXXXXXXXXXXXX XXXXXXXXXXXXX YYWWNNN DS21298C-page 22 Example: MCP3208-B I/P YYWWNNN Example: MCP3208-B XXXXXXXXXX IYWWNNN 2002 Microchip Technology Inc. ...

Page 23

... Mold Draft Angle Bottom * Controlling Parameter § Significant Characteristic Notes: Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010” (0.254mm) per side. JEDEC Equivalent: MS-001 Drawing No. C04-005 2002 Microchip Technology Inc Units ...

Page 24

... E .228 .236 .244 E1 .150 .154 .157 D .337 .342 .347 h .010 .015 .020 L .016 .033 .050 .008 .009 .010 B .014 .017 .020 MILLIMETERS MIN NOM MAX 14 1.27 1.35 1.55 1.75 1.32 1.42 1.55 0.10 0.18 0.25 5.79 5.99 6.20 3.81 3.90 3.99 8.56 8.69 8.81 0.25 0.38 0.51 0.41 0.84 1. 0.20 0.23 0.25 0.36 0.42 0. 2002 Microchip Technology Inc. ...

Page 25

... Mold Draft Angle Bottom * Controlling Parameter § Significant Characteristic Notes: Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .005” (0.127mm) per side. JEDEC Equivalent: MO-153 Drawing No. C04-087 2002 Microchip Technology Inc Units ...

Page 26

... E .300 .313 .325 E1 .240 .250 .260 D .740 .750 .760 L .125 .130 .135 c .008 .012 .015 B1 .045 .058 .070 B .014 .018 .022 eB .310 .370 .430 MILLIMETERS MIN NOM MAX 16 2.54 3.56 3.94 4.32 2.92 3.30 3.68 0.38 7.62 7.94 8.26 6.10 6.35 6.60 18.80 19.05 19.30 3.18 3.30 3.43 0.20 0.29 0.38 1.14 1.46 1.78 .036 0.46 0.56 7.87 9.40 10. 2002 Microchip Technology Inc. ...

Page 27

... Mold Draft Angle Bottom * Controlling Parameter § Significant Characteristic Notes: Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010” (0.254mm) per side. JEDEC Equivalent: MS-012 Drawing No. C04-108 2002 Microchip Technology Inc ...

Page 28

... MCP3204/3208 NOTES: DS21298C-page 28 2002 Microchip Technology Inc. ...

Page 29

... Microchip Products • Conferences for products, Development Systems, technical information and more • Listing of seminars and events 2002 Microchip Technology Inc. SYSTEMS INFORMATION AND UPGRADE HOT LINE The Systems Information and Upgrade Line provides system users a listing of the latest versions of all of Microchip's development systems software products ...

Page 30

... What deletions from the document could be made without affecting the overall usefulness there any incorrect or misleading information (what and where)? 7. How would you improve this document? DS21298C-page30 Total Pages Sent ________ FAX: (______) _________ - _________ N Literature Number: DS21298C 2002 Microchip Technology Inc. ...

Page 31

... Temperature Range Device: MCP3204: 4-Channel 12-Bit Serial A/D Converter MCP3204T: 4-Channel 12-Bit Serial A/D Converter (Tape and Reel) MCP3208: 8-Channel 12-Bit Serial A/D Converter MCP3208T: 8-Channel 12-Bit Serial A/D Converter (Tape and Reel) Grade ±1 LSB INL C = ±2 LSB INL Temperature Range -40°C to +85°C ...

Page 32

... MCP3204/08 NOTES: DS21298C-page 32 2002 Microchip Technology Inc. ...

Page 33

... Serialized Quick Turn Programming (SQTP service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received QS-9000 quality system certification for its worldwide headquarters, ...

Page 34

... Korea Microchip Technology Korea 168-1, Youngbo Bldg. 3 Floor Samsung-Dong, Kangnam-Ku Seoul, Korea 135-882 Tel: 82-2-554-7200 Fax: 82-2-558-5934 Singapore Microchip Technology Singapore Pte Ltd. 200 Middle Road #07-02 Prime Centre Singapore, 188980 Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan Microchip Technology (Barbados) Inc., Taiwan Branch 11F-3, No ...

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