MCP4021-202E/SN Microchip Technology, MCP4021-202E/SN Datasheet
MCP4021-202E/SN
Specifications of MCP4021-202E/SN
Available stocks
Related parts for MCP4021-202E/SN
MCP4021-202E/SN Summary of contents
Page 1
... Extended Temperature Range: -40°C to +125°C • Wide Bandwidth (-3 dB) Operation MHz (typ.) for 2.1 kΩ device Description The MCP4021/2/3/4 devices are non-volatile, 6-bit digital potentiometers that can be configured as either a potentiometer or rheostat. The wiper setting is controlled through a simple Up/Down (U/D) serial interface. These device’ ...
Page 2
... Non-linearity is affected by wiper resistance (R Section 6.0 “Resistor” for additional information. 8: The MCP4021 is externally connected to match the configurations of the MCP4022 and MCP4024, and then tested. DS21945E-page 2 † Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is ...
Page 3
... Resistor terminals A, W and B’s polarity with respect to each other is not restricted. 6: This specification by design 7: Non-linearity is affected by wiper resistance (R Section 6.0 “Resistor” for additional information. 8: The MCP4021 is externally connected to match the configurations of the MCP4022 and MCP4024, and then tested. © 2006 Microchip Technology Inc. Sym Min Typ Max R — ...
Page 4
... Resistor terminals A, W and B’s polarity with respect to each other is not restricted. 6: This specification by design 7: Non-linearity is affected by wiper resistance (R Section 6.0 “Resistor” for additional information. 8: The MCP4021 is externally connected to match the configurations of the MCP4022 and MCP4024, and then tested. DS21945E-page 4 Sym Min Typ Max R-INL -0.5 ± ...
Page 5
... Resistor terminals A, W and B’s polarity with respect to each other is not restricted. 6: This specification by design 7: Non-linearity is affected by wiper resistance (R Section 6.0 “Resistor” for additional information. 8: The MCP4021 is externally connected to match the configurations of the MCP4022 and MCP4024, and then tested. © 2006 Microchip Technology Inc. Sym Min Typ Max V 0.7 V — ...
Page 6
... MCP4021/2/3 LUC LCUF U/D t LCUR W FIGURE 1-1: Increment Timing Waveform. SERIAL TIMING CHARACTERISTICS Electrical Specifications: Unless otherwise noted, all parameters apply across the specified operating ranges. Extended (E +2.7V to 5.5V Parameters Sym CS Low Time t CSLO CS High Time t CSHI U Hold Time t LUC CS to U/D Low Setup Time ...
Page 7
... MHz 0.5 — — — — 2 — — — — 200 — — — — — MCP4021/2/3/4 t CSHI t t LUC LCUF t S Conditions µ µ µs 2.1 kΩ 100 pF L µs 5 kΩ 100 pF L µs 10 kΩ 100 pF L µ ...
Page 8
... MCP4021/2/3/4 12V HUC HCUF U/D t HCUR W FIGURE 1-3: High-Voltage Increment Timing Waveform. SERIAL TIMING CHARACTERISTICS Electrical Specifications: Unless otherwise noted, all parameters apply across the specified operating ranges. Extended (E +2.7V to 5.5V Parameters Sym CS Low Time t CSLO CS High Time t CSHI U/D High Time ...
Page 9
... S 1 — — 2 — — — — 200 — — — — — MCP4021/2/3/4 t CSHI t t HUC HCUF t S Conditions µ µs µs µs µs 2.1 kΩ 100 pF L µs 5 kΩ 100 pF L µs 10 kΩ, C ...
Page 10
... MCP4021/2/3/4 TEMPERATURE CHARACTERISTICS Electrical Specifications: Unless otherwise indicated, V Parameters Temperature Ranges Specified Temperature Range Operating Temperature Range Storage Temperature Range Thermal Package Resistances Thermal Resistance, 5L-SOT-23 Thermal Resistance, 6L-SOT-23 Thermal Resistance, 8L-DFN (2x3) Thermal Resistance, 8L-MSOP Thermal Resistance, 8L-SOIC DS21945E-page 10 = +2.7V to +5.5V, V ...
Page 11
... U/D FIGURE 2-4: DD Resistance (R Voltage ( 125 -40 -20 ) vs. FIGURE 2-5: WRITE Threshold vs. Ambient Temperature and V 125 ) vs. SHDN ). DD MCP4021/2/3/4 1000 800 600 400 200 -200 -400 -600 R -800 CS -1000 ( Pull-up/Pull-down ) and Current (I ) vs. CS Input 5.5V). DD 1.8V Entry 2 ...
Page 12
... MCP4021/2/3/4 Note: Unless otherwise indicated +25° 140 -40C Rw 25C Rw 85C Rw 125C Rw -40C INL 25C INL 85C INL 125C INL 120 -40C DNL 25C DNL 85C DNL 125C DNL INL 100 80 DNL Wiper Setting (decimal) Ω FIGURE 2-6: 2.1 k Pot Mode – R INL (LSb), DNL (LSb) vs ...
Page 13
... Nominal Ω Resistance ( ) vs. Ambient Temperature and © 2006 Microchip Technology Inc 2500 2000 1500 1000 500 0 80 120 0 FIGURE 2-11: Setting and Ambient Temperature. MCP4021/2/3/4 -40°C 25°C 85°C 125° Wiper Setting (decimal) Ω Ω 2.1 k – vs. Wiper WB DS21945E-page 13 ...
Page 14
... MCP4021/2/3/4 Note: Unless otherwise indicated +25° WIPER U/D Ω FIGURE 2-12: 2.1 k – Low-Voltage Decrement Wiper Settling Time (V WIPER U/D Ω FIGURE 2-13: 2.1 k – Low-Voltage Decrement Wiper Settling Time (V WIPER V Ω FIGURE 2-14: 2.1 k – Power-Up Wiper Response Time. DS21945E-page ...
Page 15
... FIGURE 2-20: W INL (LSb), DNL (LSb) vs. Wiper Setting and Ambient Temperature (V MCP4021/2/3/4 0.6 -40C Rw 25C Rw 85C Rw 125C Rw -40C INL 25C INL 85C INL 125C INL 0.4 -40C DNL 25C DNL 85C DNL 125C DNL ...
Page 16
... MCP4021/2/3/4 Note: Unless otherwise indicated +25° 4950 4925 4900 4875 V = 5.5V DD 4850 4825 V = 2.7V DD 4800 -40 - Ambient Temperature (°C) Ω FIGURE 2-21 – Nominal Resistance Ω vs. Ambient Temperature and V DS21945E-page 6000 2.7V Vdd 5.5V Vdd 5000 4000 3000 2000 1000 0 80 ...
Page 17
... Low-Voltage Decrement Wiper Settling Time (V © 2006 Microchip Technology Inc FIGURE 2-25: = 2.7V). Increment Wiper Settling Time (V DD FIGURE 2-26: = 5.5V). Increment Wiper Settling Time (V DD MCP4021/2/3/4 WIPER U/D Ω – Low-Voltage = 2.7V). DD WIPER U/D Ω – Low-Voltage = 5.5V). DD ...
Page 18
... MCP4021/2/3/4 Note: Unless otherwise indicated +25° 120 -40C Rw 25C Rw 85C Rw 125C Rw -40C INL 25C INL 85C INL 125C INL 100 -40C DNL 25C DNL 85C DNL 125C DNL DNL 80 INL Wiper Setting (decimal) Ω FIGURE 2-27 Pot Mode – R INL (LSb), DNL (LSb) vs. Wiper Setting and Ambient Temperature ( ...
Page 19
... Nominal Resistance Ω vs. Ambient Temperature and V © 2006 Microchip Technology Inc. = +25° 12000 10000 8000 6000 4000 2000 0 80 100 120 0 FIGURE 2-32: . Setting and Ambient Temperature. DD MCP4021/2/3/4 -40°C 25°C 85°C 125° Wiper Setting (decimal) Ω Ω – vs. Wiper WB DS21945E-page 19 ...
Page 20
... MCP4021/2/3/4 Note: Unless otherwise indicated +25° WIPER U/D Ω FIGURE 2-33 – Low-Voltage Decrement Wiper Settling Time (V WIPER U/D Ω FIGURE 2-34 – Low-Voltage Decrement Wiper Settling Time (V DS21945E-page FIGURE 2-35: = 2.7V). Increment Wiper Settling Time (V DD FIGURE 2-36: = 5.5V). ...
Page 21
... FIGURE 2-40: W INL (LSb), DNL (LSb) vs. Wiper Setting and Ambient Temperature (V MCP4021/2/3/4 0.15 -40C Rw 25C Rw 85C Rw 125C Rw -40C INL 25C INL 85C INL 125C INL -40C DNL 25C DNL 85C DNL 125C DNL 0.1 INL 0 ...
Page 22
... MCP4021/2/3/4 Note: Unless otherwise indicated +25° 49800 49600 49400 49200 49000 48800 48600 48400 48200 48000 -40 - Ambient Temperature (°C) Ω FIGURE 2-41 – Nominal Resistance Ω vs. Ambient Temperature and V DS21945E-page 60000 50000 V = 5.5V 40000 DD 30000 V = 2.7V DD 20000 10000 0 80 100 120 ...
Page 23
... FIGURE 2-45 – Power-Up Wiper Response Time. © 2006 Microchip Technology Inc FIGURE 2-46: = 2.7V). Increment Wiper Settling Time (V DD FIGURE 2-47: = 5.5V). Increment Wiper Settling Time ( MCP4021/2/3/4 U/D WIPER Ω – Low-Voltage = 2.7V). DD U/D WIPER Ω Low-Voltage = 5.5V). DD DS21945E-page 23 ...
Page 24
... MCP4021/2/3/4 Note: Unless otherwise indicated +25° 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 -40 25 Temperature (°C) FIGURE 2-48 Bandwidth vs. Temperature. DS21945E-page OFFSET GND 125 FIGURE 2-49: Circuit OUT - DUT B 2. Bandwidth Test © 2006 Microchip Technology Inc. ...
Page 25
... B (available on some devices). The potentiometer’s terminal B is the fixed connection to the 0x00 terminal of the digital potentiometer. The terminal B pin is available on the MCP4021 device. The terminal B pin does not have a polarity relative to the terminal pins. The terminal B pin can support both positive and negative current ...
Page 26
... MCP4021/2/3/4 3.6 Chip Select (CS) The CS pin is the chip select input. Forcing the CS pin to V enables the serial commands. These commands IL can increment and decrement the wiper. Depending on the command, the wiper may (or may not) be saved to non-volatile memeory (EEPROM). Forcing the CS pin to V enables the high-voltage serial commands ...
Page 27
... U/D pin move the wiper. The wiper value will not underflow or overflow. The new wiper setting can be saved to EEPROM, if desired, by selecting the state of the U/D pin during the rising edge of the CS pin. The non-volatile wiper enables the MCP4021/2/3/4 to operate stand alone (without microcontroller control). R CALCULATION S ...
Page 28
... EEPROM valid command is detected on the CS and U/D pins 2. FIGURE 4-2: Power-up and Brown-out. DS21945E-page 28 The default settings of the MCP4021/2/3/4 device’s from the factory are shown in TABLE 4-1: -202 Mid-scale -502 Mid-scale commands -103 Mid-scale -503 Mid-scale ) is intended ...
Page 29
... SERIAL INTERFACE 5.1 Overview The MCP4021/2/3/4 utilizes a simple 2-wire interface to increment or decrement the digital potentiometer’s wiper terminal (W), store the wiper setting in non-vola- tile memory and turn the WiperLock technology feature on or off. This interface uses the Chip Select (CS) pin, while the U/D pin is the Up/Down input ...
Page 30
... MCP4021/2/3/4 5.2.1 INCREMENT WITHOUT WRITING WIPER SETTING TO EEPROM This mode is achieved by initializing the U/D pin to a high state (V ) prior to achieving a low state ( pin. Subsequent rising edges of the U/D pin increment the wiper setting toward terminal A. This is shown in Figure 5-1. After the wiper is incremented to the desired position, ...
Page 31
... EEPROM write cycle (t ) completes. wc Note: The wiper value will not overflow. That is, once the wiper value equals 0x3F, subsequent increment commands are ignored X+1 X+2 X+3 X+4 X MCP4021/2/3 (from V ), all other X+4 WiperLock Technology Enable WiperLock Technology Disable DS21945E-page 31 ...
Page 32
... MCP4021/2/3/4 5.2.3 DECREMENT WITHOUT WRITING WIPER SETTING TO EEPROM This mode is achieved by initializing the U/D pin to a low state (V ) prior to achieving a low state (V IL pin. Subsequent rising edges of the U/D pin will decrement the wiper setting toward terminal B. This is shown in Figure 5-3. ...
Page 33
... WC Note: The wiper value will not underflow. That is, once the wiper value equals 0x00, subsequent decrement commands are ignored X-1 X-2 X-3 X-4 MCP4021/2/3/4 ) and the CS pin forced to IL (from V ), all other X-4 WiperLock Technology Enable WiperLock Technology Disable DS21945E-page 33 ...
Page 34
... MCP4021/2/3/4 5.2.5 WRITE WIPER SETTING TO EEPROM To write the current wiper setting to EEPROM, force both the CS pin and U/D pin Then force the CS IH pin Before there is a rising edge on the U/D pin, IL force the CS pin This causes the wiper setting IH value to be written to EEPROM. ...
Page 35
... WC . Note: The wiper value will not overflow. That is, IHH once the wiper value equals 0x3F, subsequent increment commands are . This ignored IHH X+1 X+2 X+3 X+4 MCP4021/2/3/4 (from V ), all other IH IHH X+4 WiperLock Technology Enable WiperLock Technology Disable DS21945E-page 35 ...
Page 36
... MCP4021/2/3/4 5.2.7 HIGH-VOLTAGE INCREMENT AND ENABLE WiperLock TECHNOLOGY This mode is achieved by initializing the U/D pin to a high state (V ) prior to the CS pin being driven Subsequent rising edges of the U/D pin increment the wiper setting toward terminal A. Set the U/D pin to the low state (V ...
Page 37
... WC . Note: The wiper value will not underflow. That is, IHH once the wiper value equals 0x00, subsequent decrement commands are . This ignored IHH X-1 X-2 X-3 X-4 X MCP4021/2/3/4 (from V ), all other IH IHH X-4 WiperLock Technology Enable WiperLock Technology Disable DS21945E-page 37 ...
Page 38
... MCP4021/2/3/4 5.2.9 HIGH-VOLTAGE DECREMENT AND ENABLE WiperLock TECHNOLOGY This mode is achieved by initializing the U/D pin to the low state (V ) prior to driving the CS pin Subsequent rising edges of the U/D pin decrement the wiper setting toward terminal B. Set the U/D pin to a high state (V ...
Page 39
... CS pin specifications) after the CS pin is forced to V After the CS pin is driven to V serial commands are ignored until the EEPROM write cycle (t ) completes. ), the wiper IHH X X+4 MCP4021/2/3/4 as soon as possible (within device . IHH (from V ), all other IH IHH ...
Page 40
... MCP4021/2/3/4 5.2.11 WRITE WIPER SETTING TO EEPROM AND ENABLE WiperLock TECHNOLOGY This mode is achieved by initializing the U/D and CS pins to a high state (V ) prior to the CS pin being driven (from V ). Set the U/D pin to a low state (V IHH IH prior to forcing the CS pin to V (from V ...
Page 41
... Required (when the system voltage is approximately 5V). Required PIC10F206 GP0 GP2 allows the CS 1 FIGURE 5-13: Digital Potentiometer Evaluation Board . DD (MCP402XEV) implementation to generate the V voltage. IHH C 1 MCP402X MCP4021/2/3/4 Figure 5-13 shows the method used on (DS51546) contains a complete and configure the MCP402X ...
Page 42
... MCP4021/2/3/4 6.0 RESISTOR Digital potentiometer applications can be divided into two categories: • Rheostat configuration • Potentiometer (or voltage divider) configuration Figure 6-1 shows a block diagram for the MCP402X resistors. A 3Fh ( 3Eh ( 3Dh ( 01h ( 00h ( Analog Mux Note 1: The wiper resistance is tap dependent. ...
Page 43
... W ignored Note: To avoid damage to the internal wiper circuitry in this configuration, care should be taken to insure the current flow never exceeds 2.5 mA. Figure 2-17, the total MCP4021/2/3 Potentiometer Configuration. resistors is AB temperature coefficient. The voltage at 6-3) is not dependent on this wiper ...
Page 44
... MCP4021/2/3/4 6.2 Wiper Resistance Wiper resistance is the series resistance of the wiper. This resistance is typically measured when the wiper is positioned at either zero-scale (00h) or full-scale (3Fh). The wiper resistance in potentiometer-generated voltage divider applications is not a significant source of error. The wiper resistance in rheostat applications can create significant non-linearity as the wiper is moved toward zero-scale (00h) ...
Page 45
... The ratiometric temperature coefficient quantifies the Ideal Transfer error in the ratio R Function This is typically the critical error when using a potentiometer device (MCP4021 and MCP4023 voltage divider configuration. 6.3.1.4 The absolute temperature coefficient quantifies the error in the end-to-end resistance (nominal resistance R ) due to temperature drift ...
Page 46
... MCP4021/2/3/4 6.3.2 MONOTONIC OPERATION Monotonic operation means that resistance increases with every step change (from terminal A to terminal B or terminal B to terminal A). The wiper resistance is different at each tap location. When changing from one tap position to the next (either increasing or decreasing), the ΔR ...
Page 47
... Particularly harsh environments may require shielding of critical signals. If low noise is desired, breadboards and wire-wrapped boards are not recommended. illustrates and MCP4021/2/3/4 DS21945E-page 47 ...
Page 48
... LCD bias trimming, audio attenuation, adjustable power supplies, motor control overcurrent trip setting, adjustable gain amplifiers and offset trimming. The MCP4021/2/3/4 devices can be used to replace the common mechanical trim pot in applications where the operating and terminal voltages are within CMOS process limitations (V 5 ...
Page 49
... The MCP4021 is used along with resistors R1 and R2 to set the offset voltage. The sum resistance should be significantly greater (> 100 times) the resistance value of the MCP4021. This allows each increment or decrement in the MCP4021 fine adjustment of the offset voltage. The input voltage of the op amp (V ) should be centered at the op amps V IN voltage ...
Page 50
... This solution puts the digital potentiometer’s R into the voltage divider W calculation. The MCP4021/2/3/4’s R coefficient is 50 ppm (-20°C to +70°C). R substantially greater than R ’s error because R AB varies with V , wiper setting and temperature ...
Page 51
... DEVELOPMENT SUPPORT 9.1 Evaluation/Demonstration Boards Currently there are three boards that are available that can be used to evaluate the MCP4021/2/3/4 family of devices. 1. The MCP402X Digital Potentiomenter Evalua- tion Board kit (MCP402XEV) contains a simple demonstration board utilizing a PIC10F206, the MCP4021 and a blank PCB, which can be ...
Page 52
... MCP4021/2/3/4 10.0 PACKAGING INFORMATION 10.1 Package Marking Information 5-Lead SOT-23 (MCP4024) XXNN 6-Lead SOT-23 (MCP4022 / MCP4023) XXNN Legend: XX...X Customer-specific information Y Year code (last digit of calendar year) YY Year code (last 2 digits of calendar year) WW Week code (week of January 1 is week ‘01’) ...
Page 53
... Example: AAA 530 256 Part Number Code MCP4021T-202E/MC AAA MCP4021T-502E/MC AAB MCP4021T-103E/MC AAC MCP4021T-503E/MC AAD Note: Applies to 8-Lead DFN Example: 402122 530256 Example: 402153E SN^^ 0530 e 3 256 Part Numbers 8L-MSOP 8L-SOIC MCP4021-202E/MS MCP4021-202E/SN MCP4021-502E/MS MCP4021-502E/SN MCP4021-103E/MS MCP4021-103E/SN MCP4021-503E/MS MCP4021-503E/ Code DS21945E-page 53 ...
Page 54
... MCP4021/2/3/4 5-Lead Plastic Small Outline Transistor (OT) (SOT-23) Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging β Dimension Limits Number of Pins Pitch Outside lead pitch (basic) Overall Height Molded Package Thickness Standoff Overall Width ...
Page 55
... L .014 .018 .022 φ .004 .006 .008 B .014 .017 .020 α β MCP4021/2/3/4 α A2 MILLIMETERS MIN NOM MAX 6 0.95 BSC 1.90 BSC 0.90 1.18 1.45 0.90 1.10 1.30 0.00 0.08 0.15 2.60 2.80 3.00 1.50 1.63 1.75 2.80 2.95 3 ...
Page 56
... MCP4021/2/3/4 8-Lead Plastic Dual-Flat No-Lead Package (MC) 2x3x0.9 mm Body (DFN) – Saw Singulated Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging D N NOTE TOP VIEW A3 Number of Pins Pitch Overall Height Standoff Contact Thickness Overall Length ...
Page 57
... 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. © 2006 Microchip Technology Inc. MCP4021/2/3 ...
Page 58
... MCP4021/2/3/4 8-Lead Plastic Small Outline (SN) – Narrow, 150 mil (SOIC) Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging 45° c β Units Dimension Limits n Number of Pins p Pitch Overall Height A Molded Package Thickness A2 Standoff § ...
Page 59
... Reordered Sections • Added 8-lead MSOP and DFN packages Revision B (April 2005) • Updated part numbers in Product Identifcation Section (PIS) • Added Appendix A: Revision History Revision A (April 2005) • Original Release of this Document © 2006 Microchip Technology Inc. MCP4021/2/3 DS21945E-page 59 ...
Page 60
... MCP4021/2/3/4 NOTES: DS21945E-page 60 © 2006 Microchip Technology Inc. ...
Page 61
... MCP4021T-103E/MC: T/R, 10 kΩ, 8-LD DFN MCP4021T-103E/MS: T/R, 10 kΩ, 8-LD MSOP MCP4021T-103E/SN: T/R, 10 kΩ, 8-LD SOIC MCP4021-202E/MS: 2.1 kΩ, 8-LD MSOP MCP4021-202E/SN: 2.1 kΩ, 8-LD SOIC MCP4021T-202E/MC: T/R, 2.1 kΩ, 8-LD DFN MCP4021T-202E/MS: T/R, 2.1 kΩ, 8-LD MSOP MCP4021T-202E/SN: T/R, 2.1 kΩ, 8-LD SOIC MCP4021-502E/MS: 5 kΩ ...
Page 62
... MCP4021/2/3/4 NOTES: DS21945E-page 62 © 2006 Microchip Technology Inc. ...
Page 63
... 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. ...
Page 64
... Fax: 886-3-572-6459 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 © 2006 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 Tel: 33-1-69-53-63-20 ...