MCP3204-AI/ST Microchip Technology, MCP3204-AI/ST Datasheet

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MCP3204-AI/ST

Manufacturer Part Number
MCP3204-AI/ST
Description
2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI™ Serial Interface, -40C to +85C, 14-TSSOP, TUBE
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
© 2007 Microchip Technology Inc.
PDIP, SOIC, TSSOP
PDIP, SOIC
pseudo-differential pairs
- 500 nA typical standby current, 2 µA max.
- 400 µA max. active current at 5V
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
DS21298D-page 1
MCP3204/3208
12-Bit SAR
Register
V
Shift
D
DD
OUT
V
SS

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MCP3204-AI/ST Summary of contents

Page 1

... 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 ...

Page 2

... V DD — — 50 ksps bits — ±0.75 ±1 LSB MCP3204/3208-B — ±1.0 ±2 MCP3204/3208-C — ±0.5 ±1 LSB No missing codes over-temperature — ±1.25 ±3 LSB — ±1.25 ±5 LSB — -82 — — 72 — ...

Page 3

... REF MCP3204/3208 = REF Conditions V Ω See Figure 4-1 See Figure ...

Page 4

... MCP3204/3208 ELECTRICAL SPECIFICATIONS (CONTINUED) Electrical Characteristics: Unless otherwise noted, all parameters apply -40°C to +85°C,f = 100 ksps and f AMB SAMPLE Parameters Sym Temperature Ranges Specified Temperature Range T A Operating Temperature T A Range Storage Temperature Range T A Thermal Package Resistance θ ...

Page 5

... Waveform 2† * Waveform 1 is for an output with internal conditions such that the output is high, unless disabled by the output control. † Waveform 2 is for an output with internal conditions such that the output is low, unless disabled by the output control. FIGURE 1-3: MCP3204/3208 Waveform 2 DIS kΩ ...

Page 6

... MCP3204/3208 2.0 TYPICAL PERFORMANCE CHARACTERISTICS Note: The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e ...

Page 7

... V DD 1.5 1.0 0.5 0.0 -0.5 -1.0 -1.5 -2.0 125 150 0 10 FIGURE 2-11: (DNL) vs. Sample Rate (V 3.0 2.0 1.0 0.0 -1.0 -2.0 -3 0.0 FIGURE 2-12: (DNL) vs. V REF MCP3204/3208 = 20 25°C. CLK SAMPLE A = 2.7 V REF = 50 ksps Positive INL Negative INL - 100 Temperature (°C) Integral Nonlinearity (INL) = 2.7V 2.7 V REF Positive DNL Negative DNL ...

Page 8

... MCP3204/3208 Note: Unless otherwise indicated 1.0 0.8 0.6 0.4 0.2 0.0 -0.2 -0.4 -0.6 -0.8 -1.0 0 512 1024 1536 2048 2560 3072 Digital Code FIGURE 2-13: Differential Nonlinearity (DNL) vs. Code (Representative Part). 1.0 0.8 0.6 0.4 Positive DNL 0.2 0.0 -0.2 -0.4 Negative DNL -0.6 -0.8 -1.0 -50 - Temperature (°C) FIGURE 2-14: Differential Nonlinearity (DNL) vs. Temperature 2 REF ksps 2 SAMPLE ...

Page 9

... FIGURE 2-23: Distortion (SINAD) vs. Input Frequency REF 10 = 100 ksps 0 100 -40 -35 FIGURE 2-24: Distortion (SINAD) vs. Input Signal Level. MCP3204/3208 = 20 25°C. CLK SAMPLE REF F = 100 ksps SAMPLE 2 REF ksps SAMPLE ...

Page 10

... MCP3204/3208 Note: Unless otherwise indicated 12.00 11.75 11.50 11.25 11. 10. 2 REF SAMPLE 10. ksps SAMPLE 10.25 10.00 9.75 9.50 9.25 9.00 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 V (V) REF FIGURE 2-25: Effective Number of Bits (ENOB) vs REF 100 SAMPLE 2 REF ksps SAMPLE Input Frequency (kHz) ...

Page 11

... FIGURE 2-34: 100 10000 FIGURE 2-35: 100 100 -50 FIGURE 2-36: MCP3204/3208 = 20 25°C. CLK SAMPLE MHz except CLK = MHz DD CLK 3.0 3.5 4.0 4.5 5.0 5.5 6 REF REF 2.7 V ...

Page 12

... MCP3204/3208 Note: Unless otherwise indicated REF 2.0 2.5 3.0 3.5 4.0 4.5 V (V) DD FIGURE 2-37 DDS DD 100. REF 10.00 1.00 0.10 0.01 -50 - Temperature (°C) FIGURE 2-38: I vs. Temperature. DDS DS21298D-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. ...

Page 13

... Conversion rates of 100 ksps are possible on the MCP3204/3208. See Section 6.2, “Maintaining Minimum Clock Speed”, for information on minimum clock rates. Communica- tion with the device is accomplished using a 4-wire SPI- compatible interface ...

Page 14

... MCP3204/3208 This diagram illustrates that the source impedance (R adds to the internal sampling switch (R directly effecting the time that is required to charge the capacitor (Csample). Consequently, larger source impedances increase the offset, gain and integral linearity errors of the conversion (see Figure 4-2). 4.2 Reference Input ...

Page 15

... This is IN often done when dealing with microcontroller-based SPI ports that must send 8 bits at a time. Refer to Section 6.1 for more details on using the MCP3204/ 3208 devices with hardware SPI ports. © 2007 Microchip Technology Inc. MCP3204/3208 ...

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. DS21298D-page 16 t CYC Don’ ...

Page 17

... This is usually done by sending ‘leading zeros’ before the start bit example, Figure 6-1 and Figure 6-2 illustrate how the MCP3204/3208 can be interfaced to a MCU with a hardware SPI port. Figure 6-1 depicts the operation shown in SPI Mode 0,0, which requires that the SCLK from the MCU idles in the ‘ ...

Page 18

... MCP3204/3208 CS MCU latches data from A/D converter on rising edges of SCLK SCLK Data is clocked out of A/D converter on falling edges SGL/ D Start DIFF IN HI-Z D OUT Start Bit MCU Transmitted Data (Aligned with falling edge of clock) MCU Received Data ...

Page 19

... Figure 6-3, where an op amp is used to drive the analog input of the MCP3204/3208. This amplifier provides a low impedance source for the converter input, and a low pass filter, which eliminates unwanted high frequency noise ...

Page 20

... DS21298D-page 20 6.5 Utilizing the Digital and Analog Ground Pins The MCP3204/3208 devices provide both digital and analog ground connections to provide another means of noise reduction. As shown in Figure 6-5, the analog and digital circuitry is separated internal to the device. This reduces noise from the digital portion of the device being coupled into the analog portion of the device ...

Page 21

... 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. © 2007 Microchip Technology Inc. MCP3204/3208 Example: e MCP3204-B 3 I/P 0723NNN Example: e MCP3204-B 3 XXXXXXXXXXX 0723NNN Example: e 3204-C 3 0723 NNN ...

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 DS21298D-page 22 Example: MCP3208 I/P 0723NNN Example: e MCP3208-B 3 XXXXXXXXXX IYWWNNN © 2007 Microchip Technology Inc. ...

Page 23

... Dimension Limits MIN N e .100 BSC A – A2 .115 A1 .015 E .290 E1 .240 D .735 L .115 c .008 b1 .045 b .014 eB – MCP3204/3208 INCHES NOM MAX 14 – .210 .130 .195 – – .310 .325 .250 .280 .750 .775 .130 .150 .010 .015 .060 .070 .018 .022 – ...

Page 24

... MCP3204/3208 14-Lead Plastic Small Outline (SL) – Narrow, 3.90 mm Body [SOIC] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging N NOTE Number of Pins Pitch Overall Height Molded Package Thickness Standoff § Overall Width ...

Page 25

... Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15 mm per side. 3. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. REF: Reference Dimension, usually without tolerance, for information purposes only. © 2007 Microchip Technology Inc. MCP3204/3208 ...

Page 26

... MCP3204/3208 16-Lead Plastic Dual In-Line (P) – 300 mil Body [PDIP] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging N NOTE Number of Pins Pitch Top to Seating Plane Molded Package Thickness Base to Seating Plane ...

Page 27

... MIN N e 1.27 BSC A – A2 1.25 A1 0.10 E 6.00 BSC E1 3.90 BSC D 9.90 BSC h 0.25 L 0.40 L1 1.04 REF φ 0° c 0.17 b 0.31 α 5° β 5° MCP3204/3208 NOM MAX 16 – 1.75 – – – 0.25 – 0.50 – 1.27 – 8° – 0.25 – 0.51 – 15° – 15° Microchip Technology Drawing C04-108B DS21298D-page 27 ...

Page 28

... MCP3204/3208 NOTES: DS21298D-page 28 © 2007 Microchip Technology Inc. ...

Page 29

... APPENDIX A: REVISION HISTORY Revision D (January 2007) This revision includes updates to the packaging dia- grams. © 2007 Microchip Technology Inc. MCP3204/3208 DS21298D-page 29 ...

Page 30

... MCP3204/3208 NOTES: DS21298D-page 30 © 2007 Microchip Technology Inc. ...

Page 31

... To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO Device Grade 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 ...

Page 32

... MCP3204/3208 NOTES: DS21298D-page 32 © 2007 Microchip Technology Inc. ...

Page 33

... Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, 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. © 2007, Microchip Technology Incorporated, Printed in the U ...

Page 34

... 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 © 2007 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 ...

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