MCP3302-I/P MICROCHIP [Microchip Technology], MCP3302-I/P Datasheet

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MCP3302-I/P

Manufacturer Part Number
MCP3302-I/P
Description
13-Bit Differential Input, Low Power A/D Converter with SPI Serial Interface
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
Features
• Full Differential Inputs
• MCP3302: 2 Differential or 4 Single ended Inputs
• MCP3304: 4 Differential or 8 Single ended Inputs
• ±1 LSB max DNL
• ±1 LSB max INL (MCP3302/04-B)
• ±2 LSB max INL (MCP3302/04-C)
• Single supply operation: 2.7V to 5.5V
• 100 ksps sampling rate with 5V supply voltage
• 50 ksps sampling rate with 2.7V supply voltage
• 50 nA typical standby current, 1 A max
• 450 A max active current at 5V
• Industrial temp range: -40°C to +85°C
• 14 and 16-pin PDIP, SOIC and TSSOP packages
• MXDEV
Applications
• Remote Sensors
• Battery Operated Systems
• Transducer Interface
Package Types
M
PDIP, SOIC, TSSOP
2002 Microchip Technology Inc.
PDIP, SOIC
13-Bit Differential Input, Low Power A/D Converter
TM
Evaluation kit available
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
14
13
12
10
11
16
15
14
13
12
11
10
9
8
9
with SPI™ Serial Interface
V
V
AGND
CLK
D
D
CS/SHDN
DGND
V
V
AGND
CLK
D
D
CS/SHDN
DD
REF
DD
REF
OUT
IN
OUT
IN
General Description
The Microchip Technology Inc. MCP3302/04 13-bit A/D
converters feature full differential inputs and low power
consumption in a small package that is ideal for battery
powered systems and remote data acquisition applica-
tions. The MCP3302 is programmable to provide two
differential input pairs or four single ended inputs. The
MCP3304 is programmable and provides four differen-
tial input pairs or eight single ended inputs.
Incorporating a successive approximation architecture
with on-board sample and hold circuitry, these 13-bit
A/D converters are specified to have ±1 LSB Differen-
tial Nonlinearity (DNL); ±1 LSB Integral Nonlinearity
(INL) for B-grade and ±2 LSB for C-grade devices. The
industry-standard SPI™ serial interface enables 13-bit
A/D converter capability to be added to any PICmicro
microcontroller.
The MCP3302/04 devices feature low current design
that permits operation with typical standby and active
currents of only 50 nA and 300 A, respectively. The
devices operate over a broad voltage range of 2.7V to
5.5V and are capable of conversion rates of up to
100 ksps. The reference voltage can be varied from
400 mV to 5V, yielding input-referred resolution
between 98 V and 1.22 mV.
The MCP3302 is available in 14-pin PDIP, 150 mil
SOIC and TSSOP packages. The MCP3304 is avail-
able in 16-pin PDIP and 150 mil SOIC packages. The
full differential inputs of these devices enable a wide
variety of signals to be used in applications such as
remote data acquisition, portable instrumentation and
battery operated applications.
MCP3302/04
DS21697B-page 1
®

Related parts for MCP3302-I/P

MCP3302-I/P Summary of contents

Page 1

... The reference voltage can be varied from 400 mV to 5V, yielding input-referred resolution between 98 V and 1.22 mV. The MCP3302 is available in 14-pin PDIP, 150 mil SOIC and TSSOP packages. The MCP3304 is avail- able in 16-pin PDIP and 150 mil SOIC packages. The full differential inputs of these devices enable a wide ...

Page 2

... MCP3302/04 Functional Block Diagram V V REF CH0 CH1 Input Channel Mux CH7* CDAC Comparator - Sample & Hold Circuits + Control Logic CS/SHDN D CLK IN * Channels 5-7 available on MCP3304 Only DS21697B-page 2 AGND DGND DD 13-Bit SAR Shift Register D OUT 2002 Microchip Technology Inc. ...

Page 3

... Serial Data Out Serial Clock Analog Ground Reference Voltage Input +2.7V to 5.5V Power Supply = 0V, and V = 5V. Full differential SS REF = 21*F SAMPLE Units Conditions ksps Note 8 ksps 2.7V, V =1.35V DD REF CM CLK periods CLK periods bits LSB MCP3302/04-B LSB MCP3302/04-C LSB Monotonic over temperature LSB LSB LSB DS21697B-page 3 ...

Page 4

... MCP3302/04 ELECTRICAL SPECIFICATIONS (CONTINUED) Electrical Characteristics: Unless otherwise noted, all parameters apply at V input configuration (Figure 3-4) with fixed common mode voltage of 2.5V. All parameters apply over temperature with T = -40°C to +85°C (Note 7). Conversion speed (F AMB Parameter Dynamic Performance Total Harmonic Distortion ...

Page 5

... A T -65 — +150 A — 70 — JA — 108 — JA — 100 — JA — 70 — JA — 90 — JA level. REF MCP3302/04 = 0V, and V = 5V. Full differential SS REF SAMPLE Units Conditions MHz 100 ksps DD SAMPLE MHz V = 2.7V ksps DD SAMPLE ns Note 5 ns Note ...

Page 6

... MCP3302/ SUCS CLK MSB OUT FIGURE 1-1: Timing Parameters DS21697B-page Null Bit Sign BIT T CSH DIS LSB 2002 Microchip Technology Inc. ...

Page 7

... FIGURE 2-5: vs REF 0.8 F SAMPLE 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 -4096 -3072 3072 4096 FIGURE 2-6: vs. Code (Representative Part, V MCP3302/04 = 0V, SS =2.7V REF Positive INL Negative INL Sample Rate (ksps) Integral Nonlinearity (INL) = 2.7V) DD Positive INL Negative INL 0.5 1 1 (V) REF Integral Nonlinearity (INL ...

Page 8

... MCP3302/04 Note: Unless otherwise indicated 100 ksps, F SAMPLE CLK 1 0.8 0.6 Positive INL 0.4 0.2 0 -0.2 -0.4 Negative INL -0.6 -0.8 -1 -50 - Temperature(°C) FIGURE 2-7: Integral Nonlinearity (INL) vs. Temperature. 1 0.8 0.6 Positive DNL 0.4 0.2 0 -0.2 Negative DNL -0.4 -0.6 -0 100 Sample Rate (ksps) FIGURE 2-8: Differential Nonlinearity (DNL) vs. Sample Rate. 2 1.5 1 Positive DNL ...

Page 9

... FIGURE 2-17: (DNL) vs. Temperature ( 2. SAMPLE FIGURE 2-18: MCP3302/04 = 0V, SS =2.7V REF = 50 ksps -2048 -1024 0 1024 2048 3072 4096 Code Differential Nonlinearity =2.7V REF = 50 ksps Positive DNL Negative DNL - 100 125 150 Temperature (° ...

Page 10

... MCP3302/04 Note: Unless otherwise indicated 100 ksps, F SAMPLE CLK SAMPLE -0.6 -0.8 -1 -1.2 -1 =2.7V DD REF ksps SAMPLE -1.6 -1.8 - Temperature (°C) FIGURE 2-19: Positive Gain Error vs. Temperature. 100 Input Frequency (kHz) FIGURE 2-20: Signal to Noise Ratio (SNR) vs ...

Page 11

... Ripple Frequency. 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 40000 50000 0 FIGURE 2-30: 1 kHz Input (Representative Part, V MCP3302/ =5V DD REF F = 100 ksps SAMPLE V =V =2.7V DD REF ksps SAMPLE 10 100 Input Frequency (kHz) Effective Number of Bits 0.1 µ ...

Page 12

... MCP3302/04 Note: Unless otherwise indicated 100 ksps, F SAMPLE CLK 450 400 350 300 250 200 150 100 2.5 3 3.5 4 4.5 V (V) DD FIGURE 2-31 600 500 V =V =5V DD REF 400 300 200 V =V =2.7V DD REF 100 100 Sample Rate (ksps) ...

Page 13

... FIGURE 2-40: Temperature 100 70 1 FIGURE 2-41: vs. Frequency MCP3302/ =2.7V DD REF V =V =5V DD REF ksps SAMPLE F = 100 ksps SAMPLE 0 50 100 150 Temperature (°C) Negative Gain Error vs. 10 100 1000 Input Frequency (kHz) ...

Page 14

... MCP3302/04 3.0 TEST CIRCUITS 1. Test Point D OUT C = 100 pF L FIGURE 3-1: Load Circuit for T Test Point DIS OUT T 100 pF T DIS V SS Voltage Waveforms for OUT Waveform 1* T DIS D OUT Waveform 2† *Waveform 1 is for an output with internal con- ditions such that the output is high, unless dis- abled by the output control ...

Page 15

... ADC conversion results. 4 The voltage on this pin can range from 2.7 to 5.5V. To ensure accuracy, a 0.1 F ceramic bypass capacitor should be placed as close as possible to the pin. See Section 6.6 for more information regarding circuit lay- out. ) MCP3302/04 ) REF REF LSB Size = 8192 DS21697B-page 15 ...

Page 16

... For a 13-bit converter, the theoretical SNR limit is 80.02 dB. Total Harmonic Distortion - Total Harmonic Distortion is (THD) is the ratio of the rms sum of the harmonics to the fundamental, measured at the output of the con- verter. For the MCP3302/04 defined using the first 9 harmonics shown in the following equation: EQUATION ...

Page 17

... Simplified Block Diagram. 2002 Microchip Technology Inc. 6.2 Driving the Analog Input The analog input of the MCP3302/04 is easily driven, either differentially or single ended. Any signal that is common to the two input channels will be rejected by the common mode rejection of the device. During the charging time of the sample capacitor, a small charging current will be required ...

Page 18

... Analog Input Model. 6.2.1 MAINTAINING MINIMUM CLOCK SPEED When the MCP3302/04 initiates, charge is stored on the sample capacitor. When the sample period is com- plete, the device converts one bit for each clock that is received important for the user to note that a slow clock rate will allow charge to bleed off the sample cap while the conversion is taking place ...

Page 19

... FIGURE 6-7: of Full Differential Input Signal versus 0.25 0.5 0.1 µF FIGURE 6-8: versus V REF MCP3302/04 -0. the common REF and the REF allows for REF levels, REF 4.05V 2.8V 2.3V 0.95V 2.5 5.0 4.0 V (V) REF Common Mode Input Range . REF ...

Page 20

... Figure 6-10). For more information on lay- out tips when using the MCP3302/04, or other ADC devices, refer to Application Note 688, “Layout Tips for 12-Bit A/D Converter Applications”. ...

Page 21

... Utilizing the Digital and Analog Ground Pins The MCP3302/04 devices provide both digital and ana- log ground connections to provide another means of noise reduction. As shown in Figure 6-11, the analog and digital circuitry are 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 22

... MCP3302/04 7.0 SERIAL COMMUNICATIONS 7.1 Output Code Format The output code format is a binary two’s complement scheme, with a leading sign bit that indicates the sign of the output. If the IN+ input is higher than the IN- input, the sign bit will be a zero. If the IN- input is higher, the sign bit will be a ‘ ...

Page 23

... This is IN often done when dealing with microcontroller-based SPI ports that must send 8 bits at a time. Refer to Section 7.3 for more details on using the MCP3302/04 devices with hardware SPI ports 2002 Microchip Technology Inc. TABLE 7-2: Control Bit ...

Page 24

... CLK running to clock out LSB first data or zeroes. † When operating in single ended mode, the sign bit will always be transmitted as a ‘0’. FIGURE 7-3: Communication with MCP3302/04 (LSB first Format). DS21697B-page 24 T SAMPLE Don’t Care ...

Page 25

... This is usually done by sending ‘leading zeros’ before the start bit. For example, Figure 7-4 and Figure 7-5 show how the MCP3302/04 devices can be interfaced to a MCU with a hardware SPI port. Figure 7-4 depicts the operation shown in SPI Mode 0,0, which requires that the SCLK from the MCU idles in the ‘ ...

Page 26

... MCU Received Data (Aligned with rising ? ? ? ? ? edge of clock) Data stored into MCU receive register after transmission of first 8 bits ? = Unknown Bits X = Don’t Care Bits FIGURE 7-5: SPI Communication with the MCP3302/04 using 8-bit segments (Mode 1,1: SCLK idles high). DS21697B-page ...

Page 27

... 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. MCP3302/04 Example: MCP3302-B I/P 0125NNN Example: MCP3302-B XXXXXXXXXXX 0YWWNNN Example: 3302-C IYWW NNN DS21697B-page 27 ...

Page 28

... MCP3302/04 Package Marking Information (Continued) 16-Lead PDIP (300 mil) (MCP3304) XXXXXXXXXXXXXX XXXXXXXXXXXXXX YYWWNNN 16-Lead SOIC (150 mil) (MCP3304) XXXXXXXXXXXXX XXXXXXXXXXXXX YYWWNNN Legend: XX...X Customer specific information* YY Year code (last 2 digits of calendar year) WW Week code (week of January 1 is week ‘01’) NNN ...

Page 29

... A2 .115 .130 .145 A1 .015 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 MCP3302/ MILLIMETERS MIN NOM MAX 14 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 0.36 0.46 0.56 7.87 9.40 10. ...

Page 30

... MCP3302/04 14-Lead Plastic Small Outline (SL) – Narrow, 150 mil (SOIC Dimension Limits Number of Pins Pitch Overall Height Molded Package Thickness Standoff § Overall Width Molded Package Width Overall Length Chamfer Distance Foot Length Foot Angle Lead Thickness Lead Width ...

Page 31

... A2 .033 .035 .037 A1 .002 .004 .006 E .246 .251 .256 E1 .169 .173 .177 D .193 .197 .201 L .020 .024 .028 .004 .006 .008 B1 .007 .010 .012 MCP3302/04 A2 MILLIMETERS* MIN NOM MAX 14 0.65 1.10 0.85 0.90 0.95 0.05 0.10 0.15 6.25 6.38 6.50 4.30 4.40 4.50 4.90 5.00 5.10 0.50 0.60 0. 0.09 0.15 0.20 0.19 0.25 0. DS21697B-page 31 ...

Page 32

... MCP3302/04 16-Lead Plastic Dual In-line (P) – 300 mil (PDIP Dimension Limits Number of Pins Pitch Top to Seating Plane Molded Package Thickness Base to Seating Plane Shoulder to Shoulder Width Molded Package Width Overall Length Tip to Seating Plane Lead Thickness Upper Lead Width ...

Page 33

... A2 .052 .057 .061 A1 .004 .007 .010 E .228 .237 .244 E1 .150 .154 .157 D .386 .390 .394 h .010 .015 .020 L .016 .033 .050 .008 .009 .010 B .013 .017 .020 MCP3302/04 A2 MILLIMETERS MIN NOM MAX 16 1.27 1.35 1.55 1.75 1.32 1.44 1.55 0.10 0.18 0.25 5.79 6.02 6.20 3.81 3.90 3.99 9.80 9.91 10.01 0.25 0.38 0.51 0.41 0.84 1. 0.20 0.23 0.25 0.33 0.42 0. ...

Page 34

... MCP3302/04 NOTES: DS21697B-page 34 2002 Microchip Technology Inc. ...

Page 35

... Conferences for products, Development Systems, technical information and more • Listing of seminars and events 2002 Microchip Technology Inc. MCP3302/04 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 36

... Telephone: (_______) _________ - _________ Application (optional): Would you like a reply? Y Device: MCP3302/04 Questions: 1. What are the best features of this document? 2. How does this document meet your hardware and software development needs you find the organization of this data sheet easy to follow? If not, why? 4 ...

Page 37

... 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: MCP3302: 13-Bit Serial A/D Converter MCP3302T: 13-Bit Serial A/D Converter (Tape and Reel) MCP3304: 13-Bit Serial A/D Converter MCP3304T: 13-Bit Serial A/D Converter (Tape and Reel) Grade ±1 LSB INL C = ±2 LSB INL Temperature Range -40° ...

Page 38

... MCP3302/04 NOTES: DS21697B-page 38 2002 Microchip Technology Inc. ...

Page 39

... Microchip. No licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. 2002 Microchip Technology Inc. MCP3302/04 Trademarks The Microchip name and logo, the Microchip logo, FilterLab microID, MPLAB, PIC, PICmicro, PICMASTER, ...

Page 40

M W ORLDWIDE AMERICAS Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: 480-792-7627 Web Address: http://www.microchip.com Rocky Mountain 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7966 Fax: 480-792-4338 Atlanta 500 Sugar Mill ...

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