MC3302-BI/P MICROCHIP [Microchip Technology], MC3302-BI/P Datasheet

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MC3302-BI/P

Manufacturer Part Number
MC3302-BI/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 MC3302-BI/P

MC3302-BI/P Summary of contents

Page 1

M 13-Bit Differential Input, Low Power A/D Converter with SPI™ Serial Interface Features • Full Differential Inputs • MCP3302: 2 Differential or 4 Single ended Inputs • MCP3304: 4 Differential or 8 Single ended Inputs • ±1 LSB max DNL ...

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 ...

Page 3

ELECTRICAL CHARACTERISTICS Maximum Ratings* V ........................................................................ 7.0V DD All inputs and outputs w.r.t. V .....-0. Storage temperature .......................... -65°C to +150°C Ambient temp. with power applied ..... -65°C to +125°C Maximum Junction Temperature ....................... 150°C ESD ...

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 ...

Page 5

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 ...

Page 6

MCP3302/ SUCS CLK MSB OUT FIGURE 1-1: Timing Parameters DS21697B-page Null Bit Sign BIT T CSH T T ...

Page 7

TYPICAL PERFORMANCE CURVES 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 ...

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) ...

Page 9

Note: Unless otherwise indicated 100 ksps, F SAMPLE CLK 1 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 -4096 -3072 -2048 -1024 0 1024 2048 Code FIGURE 2-13: Differential Nonlinearity (DNL) vs. Code (Representative Part). ...

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 -50 0 ...

Page 11

Note: Unless otherwise indicated 100 ksps, F SAMPLE CLK =2. ksps F SAMPLE SAMPLE (V) REF FIGURE ...

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 ...

Page 13

Note: Unless otherwise indicated 100 ksps, F SAMPLE CLK 2.5 3 3.5 4 4.5 V (V) DD FIGURE 2-37 DDS DD 100 10 ...

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 ...

Page 15

PIN DESCRIPTIONS The descriptions of the pins are listed in Table 4-1. TABLE 4-1: PIN FUNCTION TABLE Name Function CH0-CH7 Analog Inputs DGND Digital Ground CS/SHDN Chip Select / Shutdown Input D Serial Data Serial Data ...

Page 16

MCP3302/04 5.0 DEFINITION OF TERMS Bipolar Operation - This applies to either a differential or single ended input configuration, where both positive and negative codes are output from the A/D converter. Full bipolar range includes all 8192 codes. For bipolar ...

Page 17

APPLICATIONS INFORMATION 6.1 Conversion Description The MCP3302/04 A/D converters employ a conven- tional SAR architecture. With this architecture, the potential between the IN+ and IN- inputs are simulta- neously sampled and stored with the internal sample circuits for 1.5 ...

Page 18

MCP3302/04 V CHx PIN Legend VA = signal source = source impedance R SS CHx = input channel pad = input pin capacitance C PIN = threshold voltage leakage current ...

Page 19

F MCP6021 IN MCP330X IN IN OUT IN MCP1525 1 F FIGURE 6-5: Adding an amplifier allows for gain and also buffers the input from ...

Page 20

MCP3302/04 6.5 Buffering/Filtering the Analog Inputs Inaccurate conversion results may occur if the signal source for the A/D converter is not a low impedance source. Buffering the input will overcome the imped- ance issue also recommended that an ...

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 ...

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, ...

Page 23

Communicating with the MCP3302 and MCP3304 Communication with the MCP3302/04 devices is done using a standard SPI-compatible serial interface. Initi- ating communication with either device is done by bringing the CS line low (see Figure 7-2). If the device ...

Page 24

MCP3302/ SUCS CLK SGL Start D DIFF IN HI-Z D OUT T ACQ * After completing the data transfer, if further clocks are applied with CS low, the A/D Converter will output LSB first data, ...

Page 25

Using the MCP3302/04 with Microcontroller (MCU) SPI Ports With most microcontroller SPI ports required to send groups of eight bits also required that the microcontroller SPI port be configured to clock out data on the ...

Page 26

MCP3302/04 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/ Start D DIFF IN HI-Z D OUT Start Bit ...

Page 27

PACKAGING INFORMATION 8.1 Package Marking Information 14-Lead PDIP (300 mil) XXXXXXXXXXXXXX XXXXXXXXXXXXXX YYWWNNN 14-Lead SOIC (150 mil) XXXXXXXXXXX XXXXXXXXXXX YYWWNNN 14-Lead TSSOP (4.4mm) † XXXXXXXX YYWW NNN †Please contact Microchip Factory for B-Grade TSSOP devices Legend: XX...X Customer specific ...

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 ...

Page 29

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 ...

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 ...

Page 31

Plastic Thin Shrink Small Outline (ST) – 4.4 mm (TSSOP Dimension Limits Number of Pins Pitch Overall Height Molded Package Thickness Standoff § Overall Width Molded Package Width Molded Package Length Foot Length ...

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 ...

Page 33

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 ...

Page 34

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

Page 35

ON-LINE SUPPORT Microchip provides on-line support on the Microchip World Wide Web (WWW) site. The web site is used by Microchip as a means to make files and information easily available to customers. To view the site, the user must ...

Page 36

MCP3302/04 READER RESPONSE It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip prod- uct. If you wish to provide your comments on organization, clarity, subject matter, and ways in which ...

Page 37

PRODUCT IDENTIFICATION SYSTEM 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 ...

Page 38

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

Page 39

Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates your responsibility to ensure that your application meets with your specifications. No representation or warranty is ...

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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