MCP42100T-I/ST

Manufacturer Part NumberMCP42100T-I/ST
DescriptionIC POT DGTL 100K 2CH SPI 14TSSOP
ManufacturerMicrochip Technology
MCP42100T-I/ST datasheets

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Specifications of MCP42100T-I/ST

Package / Case14-TSSOPTaps256
Resistance (ohms)100KNumber Of Circuits2
Temperature Coefficient800 ppm/°C TypicalMemory TypeNon-Volatile
InterfaceSPI, 3-Wire SerialVoltage - Supply2.7 V ~ 5.5 V
Operating Temperature-40°C ~ 85°CMounting TypeSurface Mount
Resistance In Ohms100KNumber Of PotsDual
Taps Per Pot256Resistance100 KOhms
Buffered WiperBufferedDigital InterfaceSerial
Operating Supply Voltage2.7 V to 5.5 VSupply Current340 uA
Maximum Operating Temperature+ 85 CMinimum Operating Temperature- 40 C
Description/function256 Step SPI 100k Ohm with SPI InterfaceMounting StyleSMD/SMT
Supply Voltage (max)5.5 VSupply Voltage (min)2.7 V
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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M
Single/Dual Digital Potentiometer with SPI
Features
• 256 taps for each potentiometer
• Potentiometer values for 10 k , 50 k and
100 k
• Single and dual versions
• SPI™ serial interface (mode 0,0 and 1,1)
• ±1 LSB max INL & DNL
• Low power CMOS technology
• 1 µA maximum supply current in static operation
• Multiple devices can be daisy-chained together
(MCP42XXX only)
• Shutdown feature open circuits of all resistors for
maximum power savings
• Hardware shutdown pin available on MCP42XXX
only
• Single supply operation (2.7V - 5.5V)
• Industrial temperature range: -40°C to +85°C
• Extended temperature range: -40°C to +125°C
Block Diagram
SHDN
RS
V
DD
V
SS
Wiper
Control
Register
Logic
CS
Wiper
Resistor
16-Bit
Register
Array 1*
SI
Shift
Register
SCK
S0
*Potentiometer P1 is only available on the dual
MCP42XXX version.
2003 Microchip Technology Inc.
MCP41XXX/42XXX
Description
The MCP41XXX and MCP42XXX devices are 256-
position, digital potentiometers available in 10 k ,
50 k
and
100 k
MCP41XXX is a single-channel device and is offered in
an 8-pin PDIP or SOIC package. The MCP42XXX con-
tains two independent channels in a 14-pin PDIP, SOIC
or TSSOP package. The wiper position of the
MCP41XXX/42XXX varies linearly and is controlled via
an industry-standard SPI interface. The devices con-
sume <1 µA during static operation. A software shut-
down feature is provided that disconnects the “A”
terminal from the resistor stack and simultaneously con-
nects the wiper to the “B” terminal. In addition, the dual
MCP42XXX has a SHDN pin that performs the same
function in hardware. During shutdown mode, the con-
tents of the wiper register can be changed and the
potentiometer returns from shutdown to the new value.
The wiper is reset to the mid-scale position (80h) upon
power-up. The RS (reset) pin implements a hardware
reset and also returns the wiper to mid-scale. The
MCP42XXX SPI interface includes both the SI and SO
pins, allowing daisy-chaining of multiple devices. Chan-
nel-to-channel resistance matching on the MCP42XXX
varies by less than 1%. These devices operate from a
single 2.7 - 5.5V supply and are specified over the
PB0
extended and industrial temperature ranges.
Resistor
Array 0
Package Types
PA0
PW0
PDIP/SOIC
PB1
CS
PA1
SCK
PW1
SI
V
SS
PDIP/SOIC/TSSOP
CS
SCK
SI
V
SS
PB1
PW1
PA1
™
Interface
resistance
versions.
The
1
8
V
DD
2
7
PB0
6
3
PW0
5
4
PA0
14
1
V
DD
13
2
SO
12
3
SHDN
11
RS
4
10
PB0
5
6
9
PW0
7
8
PA0
DS11195C-page 1

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MCP42100T-I/ST Summary of contents

  • Page 1

    ... Register Array 1* SI Shift Register SCK S0 *Potentiometer P1 is only available on the dual MCP42XXX version. 2003 Microchip Technology Inc. MCP41XXX/42XXX Description The MCP41XXX and MCP42XXX devices are 256- position, digital potentiometers available and 100 k MCP41XXX is a single-channel device and is offered in an 8-pin PDIP or SOIC package. The MCP42XXX con- tains two independent channels in a 14-pin PDIP, SOIC or TSSOP package ...

  • Page 2

    ... 2.1 mA -400 µ includes V SHDN 5.0V +25° MHz 5.5V MHz SCK SO = Open, Code FFh (Note 6) CS, SHDN 5.5V Open (Note 4.5V - 5.5V 4.5V, Code 80h 2.7V - 3.3V 2.7V, Code 80h µA for and V = 0V. DNL 2003 Microchip Technology Inc. ...

  • Page 3

    ... Resistor terminals A,B and W have no restrictions on polarity with respect to each other. Full-scale and zero-scale error were measured using Figure 2-25. 5: Measured at V pin where the voltage on the adjacent Supply current is independent of current through the potentiometers. 2003 Microchip Technology Inc. MCP41XXX/42XXX = +2.7V to 5.5V -40°C to +85°C (TSSOP devices are only specified at +25°C and +25° ...

  • Page 4

    ... 2.1 mA -400 µ includes V SHDN 5.0V +25° MHz 5.5V MHz SCK SO = Open, Code FFh (Note 6) CS, SHDN 5.5V Open (Note 4.5V - 5.5V 4.5V, Code 80h 2.7V - 3.3V 2.7V, Code 80h µA for and V = 0V. DNL 2003 Microchip Technology Inc. ...

  • Page 5

    ... Applies only to the MCP42XXX devices. 3: Applies only when using hardware pins to exit software shutdown mode, MCP42XXX only. 2003 Microchip Technology Inc. MCP41XXX/42XXX † Notice: Stresses above those listed under “maximum rat- ings” may cause permanent damage to the device. This is a +1.0V ...

  • Page 6

    ... OUT FIGURE 1-2: Reset Timing. t CSL CS RS SHDN FIGURE 1-3: Software Shutdown Exit Timing. DS11195C-page 6 1/F CLK Code 80h is latched on rising edge RSCS ±1% ±1% Error Band CSH t CHS t CS1 ±1% S ±1% Error Band 2003 Microchip Technology Inc. ...

  • Page 7

    ... Code (Decimal) FIGURE 2-2: Potentiometer INL Error vs. Code - 128 160 Code (Decimal) FIGURE 2-3: Potentiometer Mode Tempco vs. Code. 2003 Microchip Technology Inc. MCP41XXX/42XXX MCP41010, MCP42010 ( -40 -25 -10 192 224 256 FIGURE 2-4: vs. Temperature -40°C to +85° MCP41050, MCP42050 (50 k potentiometers) ...

  • Page 8

    ... Code = FFh 110 125 Temperature (°C) Active Supply Current vs. = 5.5V, Code = AAh DD = 3.3V, Code = AAh DD = 5.5V, Code = FFh DD = 3.3V, Code = FFh 10k 100k 1M 10M Clock Frequency (Hz) Active Supply Current vs 5. & SHDN Pin Voltage (V) Reset & Shutdown Pins 2003 Microchip Technology Inc. ...

  • Page 9

    ... Wiper Resistance ( ) FIGURE 2-14 100 k Device Wiper Resistance Histogram. V Code = 7Fh OUT CS FIGURE 2-15: One Position Settling Time. 2003 Microchip Technology Inc. MCP41XXX/42XXX V OUT 00h CS FIGURE 2-16: V OUT CS FIGURE 2-17: Time. ...

  • Page 10

    ... DD Code = 80h Potentiometer pF Refer to Figure 2- Potentiometer 100 k Potentiometer 10k 100k 1M 10M Frequency (Hz) Power Supply Rejection MCP41010, MCP42010 mA, Code = 00h, Refer to Figure 2- 2. Terminal B Voltage ( Wiper Resistance vs. Code = 00h Refer to Figure 2- 2. Terminal B Voltage ( & 100 k Wiper 2003 Microchip Technology Inc. ...

  • Page 11

    ... Resistor Position Non- Linearity Error Test Circuit (Rheostat operation DNL, INL). Rsw = 0.1V A Code = 00h W DUT FIGURE 2-27: Wiper Resistance Test Circuit. 2003 Microchip Technology Inc. MCP41XXX/42XXX MEAS - PSRR (dB) = 20LOG PSS (%/%) = V *Assume infinite input impedance FIGURE 2-28: Test Circuit (PSS, PSRR ...

  • Page 12

    ... Wiper Connection For Pot 1 7 PA1 Terminal A Connection For Pot 1 8 PA0 Terminal A Connection For Pot 0 9 PW0 Wiper Connection For Pot 0 10 PB0 Terminal B Connection For Pot Reset Input 12 SHDN Shutdown Input 13 SO Data Out for Daisy-Chaining 14 V Power DD 2003 Microchip Technology Inc. ...

  • Page 13

    ... V DD 0.1 uF µC Data Lines 2003 Microchip Technology Inc. MCP41XXX/42XXX power-up, all data registers will automatically be loaded with the mid-scale value (80h). The serial interface pro- vides the means for loading data into the shift register, which is then transferred to the data registers. The ...

  • Page 14

    ... MCP4XXXX Three terminal or voltage resistor to the R resistor WB AB 2003 Microchip Technology Inc. ...

  • Page 15

    ... FIGURE 4-5: Single-supply, programmable, non-inverting gain amplifier. 2003 Microchip Technology Inc. MCP41XXX/42XXX In order for these circuits to work properly, care must be taken in a few areas. For linear operation, the analog input and output signals must be in the range for the potentiometer and input and output rails of DD the op-amp ...

  • Page 16

    ... Note: All values shown are typical and actual results will vary. FIGURE 4-10: calculations 256 D – ------------------------------------------- - + 256 --------------------------- - + 256 or 100 k ) Potentiometer resistances Example Code = C0h = 192d PB R 256 D – ------------------------------------------- - + 256 10k 256 192 – = -------------------------------------------------- - + 52 256 = 2552 --------------------------- - + 256 10k 192 = ---------------------------------- - + 52 256 = 7552 Example Resistance 2003 Microchip Technology Inc. ...

  • Page 17

    ... A ‘1’ for either will cause the data to be written to the respective data register and a ‘0’ for will cause no change. See Figure 5-2 for the command format summary. 2003 Microchip Technology Inc. MCP41XXX/42XXX 5.3 Using The Shutdown Command ...

  • Page 18

    ... Data Registers are loaded on rising edge of CS. Shift register is loaded with zeros at this time. SO pin will always drive low when CS goes high. X Potentiometer Selections Dummy Code: Neither Potentiometer affected. Command executed on Potentiometer 0. Command executed on Potentiometer 1. Command executed on both Potentiometers. 2003 Microchip Technology Inc. ...

  • Page 19

    ... The serial data out pin (SO) is only available on the MCP42XXX device. FIGURE 5-3: Timing Diagram for Daisy-Chain Configuration. 2003 Microchip Technology Inc. MCP41XXX/42XXX When using the daisy-chain configuration, keep in mind that the shift register of each device is automatically loaded with zeros whenever a command is executed (CS = high) ...

  • Page 20

    ... After 32 clocks, Device 2 has the data previously loaded into Device 1 and Device 3 gets 16 more zeros. Device 3 00000000 00000000 After 48 clocks, all 3 devices have the proper command/ data loaded into their shift registers. Device 3 XX10XX00 10101010 2003 Microchip Technology Inc. ...

  • Page 21

    ... Power-up Considerations When the device is powered on, the data registers will be set to mid-scale (80h). A power-on reset circuit is utilized to ensure that the device powers up in this known state. 2003 Microchip Technology Inc. MCP41XXX/42XXX TABLE 5-1: TRUTH TABLE FOR LOGIC INPUTS SCK CS ...

  • Page 22

    ... SCK DATA BYTE Channel Select New Register Data Bits Bits X P1 Data Registers are loaded on rising edge of CS. Shift register is loaded with zeros at this time pin will always drive low when CS goes high. X 2003 Microchip Technology Inc. ...

  • Page 23

    ... Standard marking consists of Microchip part number, year code, week code, facility code, mask rev#, and assembly code. 2003 Microchip Technology Inc. MCP41XXX/42XXX Example: MCP41010 I/P256 0313 ...

  • Page 24

    ... MILLIMETERS MIN NOM MAX 8 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 9.14 9.46 9.78 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. 2003 Microchip Technology Inc. ...

  • Page 25

    ... Mold Draft Angle Top 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. C04-057 2003 Microchip Technology Inc. MCP41XXX/42XXX ...

  • Page 26

    ... 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. 2003 Microchip Technology Inc. ...

  • Page 27

    ... Mold Draft Angle Top 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. C04-065 2003 Microchip Technology Inc. MCP41XXX/42XXX ...

  • Page 28

    ... B .007 .010 .012 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. 2003 Microchip Technology Inc. ...

  • Page 29

    ... SOIC pkg. j) MCP42050T-I/ST: Tape and Reel, I-Temp., 14LD TSSOP pkg. k) MCP42100-E/P: E-Temp., 14LD PDIP pkg. l) MCP42100-I/SL: I-Temp., 14LD SOIC pkg. m) MCP42100-E/ST: E-Temp., 14LD TSSOP pkg. n) MCP42100T-I/SL: Tape and Reel, I-Temp., 14LD SOIC pkg. o) MCP42100T-I/ST: Tape and Reel, I-Temp., 14LD TSSOP pkg. DS11195C-page 29 ...

  • Page 30

    ... MCP41XXX/42XXX NOTES: DS11195C-page 30 2003 Microchip Technology Inc. ...

  • Page 31

    ... 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. © 2003, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received QS-9000 quality system ...

  • Page 32

    ... Italy Via Quasimodo, 12 20025 Legnano (MI) Milan, Italy Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands Biesbosch 14 NL-5152 SC Drunen, Netherlands Tel: 31-416-690399 Fax: 31-416-690340 United Kingdom 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44-118-921-5869 Fax: 44-118-921-5820 07/28/03 2003 Microchip Technology Inc. ...

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