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MCP4811 Datasheet

Download or read online Microchip Technology MCP4811 8/10/12-Bit Voltage Output Digital-To-Analog Converter With Internal VREF And SPI Interface pdf datasheet.



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MCP4801/4811/4821
8/10/12-Bit Voltage Output Digital-to-Analog Converter
with Internal V
Features
• MCP4801: 8-Bit Voltage Output DAC
• MCP4811: 10-Bit Voltage Output DAC
• MCP4821: 12-Bit Voltage Output DAC
• Rail-to-Rail Output
• SPI Interface with 20 MHz Clock Support
• Simultaneous Latching of the DAC Output
with LDAC Pin
• Fast Settling Time of 4.5 µs
• Selectable Unity or 2x Gain Output
• 2.048V Internal Voltage Reference
• 50 ppm/° C V
Temperature Coefficient
REF
• 2.7V to 5.5V Single-Supply Operation
• Extended Temperature Range: -40° C to +125° C
Applications
• Set Point or Offset Trimming
• Sensor Calibration
• Precision Selectable Voltage Reference
• Portable Instrumentation (Battery-Powered)
• Calibration of Optical Communication Devices
(1)
Related Products
DAC
No. of
P/N
Resolution
Channel
MCP4801
8
1
MCP4811
10
1
MCP4821
12
1
MCP4802
8
2
MCP4812
10
2
MCP4822
12
2
MCP4901
8
1
MCP4911
10
1
MCP4921
12
1
MCP4902
8
2
MCP4912
10
2
MCP4922
12
2
Note 1: The products listed here have similar
AC/DC performances.
 2010 Microchip Technology Inc.
and SPI Interface
REF
Description
The MCP4801/4811/4821 devices are single channel
8-bit, 10-bit and 12-bit buffered voltage output
Digital-to-Analog Converters (DACs), respectively. The
devices operate from a single 2.7V to 5.5V supply with
an SPI compatible Serial Peripheral Interface.
The devices have a high precision internal voltage
reference (V
REF
full-scale range of the device to be 2.048V or 4.096V by
setting the Gain Selection Option bit (gain of 1 of 2).
The devices can be operated in Active or Shutdown
mode by setting a Configuration register bit or using the
SHDN pin. In Shutdown mode, most of the internal
circuits, including the output amplifier, are turned off for
power savings, while the amplifier output (V
configured to present a known high resistance output
load (500 k typical.
The
devices
allowing a synchronous update of the DAC output
using the LDAC pin. These devices also incorporate a
Power-on Reset (POR) circuit to ensure reliable power-
up.
The devices utilize a resistive string architecture, with
its inherent advantages of low DNL error, low ratio
metric temperature coefficient and fast settling time.
These devices are specified over the extended
temperature range (+125° C).
Voltage
The devices provide high accuracy and low noise
Reference
performance for consumer and industrial applications
(V
)
where calibration or compensation of signals (such as
REF
temperature, pressure and humidity) are required.
The MCP4801/4811/4821 devices are available in the
PDIP, SOIC, MSOP and DFN packages.
Internal
(2.048V)
External
= 2.048V). The user can configure the
) stage is
OUT
include
double-buffered
registers,
DS22244B-page 1

Summary of Contents

Page 1

... Voltage Output Digital-to-Analog Converter with Internal V Features MCP4801: 8-Bit Voltage Output DAC MCP4811: 10-Bit Voltage Output DAC MCP4821: 12-Bit Voltage Output DAC Rail-to-Rail Output SPI Interface with 20 MHz Clock Support Simultaneous Latching of the DAC Output with LDAC Pin • ...

Page 2

... OUT SHDN 6 3 SCK 5 4 LDAC SDI MCP4801: 8-bit single DAC MCP4811: 10-bit single DAC MCP4821: 12-bit single DAC Table 3-1. CS SDI SCK Interface Logic Power-on Reset Input Register DAC V REF Register (2.048V) String DAC Gain Output ...

Page 3

... I DD Hardware Shutdown Current I SHDN Software Shutdown Current I SHDN_SW Power-on Reset Threshold V POR DC Accuracy MCP4801 Resolution n INL Error INL DNL DNL MCP4811 Resolution n INL Error INL DNL DNL MCP4821 Resolution n INL Error INL DNL DNL Offset Error V OS Offset Error Temperature V /° ...

Page 4

... Code 0xFFFh Accuracy is better than 1 LSb for OUT (V 40 mV) DD 400 pF µs Within ½ LSb of final value from ¼ to ¾ full-scale range 1 LSb change around major carry (0111...1111 to 1000...0000) 2010 Microchip Technology Inc. ...

Page 5

... DD Hardware Shutdown I SHDN Current Software Shutdown Current I SHDN_SW Power-on Reset threshold V POR DC Accuracy MCP4801 Resolution n INL Error INL DNL DNL MCP4811 Resolution n INL Error INL DNL DNL MCP4821 Resolution n INL Error INL DNL DNL Offset Error V OS Offset Error Temperature V /° C ...

Page 6

... MHz (Note 1) CLK MHz T 25° C (Note Note 1 ns Note 1 ns Applies only when CS falls with CLK high. (Note 1) ns Note 1 ns Note 1 ns Note 1 ns Note 1 ns Note 1 ns Note 1 ns Note 1 2010 Microchip Technology Inc. ...

Page 7

... Thermal Resistance, 8L-MSOP Thermal Resistance, 8L-PDIP Thermal Resistance, 8L-SOIC Note 1: The MCP4801/4811/4821 devices operate over this extended temperature range, but with reduced performance. Operation in this range must not cause T of 150° C. 2010 Microchip Technology Inc. MCP4801/4811/4821 2.7V to 5.5V ...

Page 8

... C 100 pF Ambient Temperature 125C 85 25 1024 2048 3072 4096 Code (Decimal) INL vs. Code and - 100 120 Ambient Temperature (ºC) Absolute INL vs. 1024 2048 3072 4096 Code (Decimal) INL vs. Code (MCP4821). 2010 Microchip Technology Inc. ...

Page 9

... 128 256 384 512 640 768 Code FIGURE 2-8: INL vs. Code and Temperature (MCP4811). 0.15 o Temperature 125 0.1 0. -0.05 -0.1 -0. 128 160 192 224 256 Code FIGURE 2-9: DNL vs. Code and Temperature (MCP4801). 2010 Microchip Technology Inc. MCP4801/4811/4821 ...

Page 10

... Gain REF 10k 100k 1E4 1E5 FIGURE 2-16 1E6 FIGURE 2-17: 5.5V 5.0V 4.0V 3.0V 2. 100 120 . k 100 pF (µ Histogram (V 2.7V (µ Histogram (V 5.0V 2010 Microchip Technology Inc. ...

Page 11

... Ambient Temperature (ºC) FIGURE 2-19: Software Shutdown Current vs. Temperature and 0.11 0.09 0.07 0.05 0.03 0.01 -0.01 -0.03 -40 - Ambient Temperature (ºC) FIGURE 2-20: Offset Error vs. Temperature and 2010 Microchip Technology Inc. MCP4801/4811/4821 5V 0V 2.048V, Gain REF -0.05 5.5V 5.0V -0.1 4.0V -0.15 3.0V 2.7V -0 -0.25 -0.3 -0.35 -0.4 -0.45 -0.5 -40 -20 100 120 FIGURE 2-21: and V ...

Page 12

... Output Shorted to V 0.0 0 100 120 FIGURE 2-28 5.5V 5.0V 4.0V 3.0V 2.7V 100 120 5 k 100 pF 5.5V 5.0V 4.0V 3.0V 2. 100 120 Ambient Temperature (ºC) I High Short vs. OUT . DD 4.096V REF (mA) OUT I vs Gain 2x. OUT OUT 2010 Microchip Technology Inc. ...

Page 13

... SCK LDAC Time (1 µs/div) FIGURE 2-30: V Fall Time. OUT V OUT SCK LDAC Time (1 µs/div) FIGURE 2-31: V Rise Time. OUT 2010 Microchip Technology Inc. MCP4801/4811/4821 5V 0V 2.048V, Gain REF V OUT LDAC Time (1 µs/div) FIGURE 2-32 OUT SCK LDAC Time (1 µ ...

Page 14

... MCP4801/4811/4821 NOTES: DS22244B-page 14 2010 Microchip Technology Inc. ...

Page 15

... Chip Select (CS the Chip Select input pin, which requires an active low to enable serial clock and data functions. 3.3 Serial Clock Input (SCK) SCK is the SPI compatible serial clock input pin. 2010 Microchip Technology Inc. MCP4801/4811/4821 Table 3-1. Description Supply Voltage Input (2.7V to 5.5V) ...

Page 16

... MCP4801/4811/4821 NOTES: DS22244B-page 16 2010 Microchip Technology Inc. ...

Page 17

... GENERAL OVERVIEW The MCP4801, MCP4811 and MCP4821 are single channel voltage-output 8-bit, 10-bit and 12-bit DAC devices, respectively. These devices include rail-to-rail output amplifier, internal voltage reference, shutdown and reset-management circuitry. The devices use an SPI serial communication interface and operate with a single supply voltage from 2 ...

Page 18

... REF 4.1.2 VOLTAGE REFERENCE The MCP4801/4811/4821 devices utilize internal 2.048V voltage reference. The voltage reference has a low temperature coefficient and characteristics. Refer to Section 1.0 Electrical Char- acteristics for the voltage reference specifications. 2010 Microchip Technology Inc. to OUT low noise ...

Page 19

... (V) DD POR FIGURE 4-3: Typical Transient Response. 2010 Microchip Technology Inc. MCP4801/4811/4821 4.1.4 SHUTDOWN MODE The user can shut down the device using a software command (

Page 20

... MCP4801/4811/4821 NOTES: DS22244B-page 20 2010 Microchip Technology Inc. ...

Page 21

... Refer to Figure 1-1 and the SPI Timing Specifications Table for detailed input and output timing specifications for both Mode 0,0 and Mode 1,1 operation. 2010 Microchip Technology Inc. MCP4801/4811/4821 5.2 Write Command The write command is initiated by driving the CS pin low, followed by clocking the four Configuration bits and the 12 data bits into the SDI pin on the rising edge of SCK ...

Page 22

... MCP4801/4811/4821 REGISTER 5-1: WRITE COMMAND REGISTER FOR MCP4821 (12-BIT DAC) W-x W-x W-x W-0 W-x 0 GA SHDN D11 bit 15 REGISTER 5-2: WRITE COMMAND REGISTER FOR MCP4811 (10-BIT DAC) W-x W-x W-x W-0 W-x 0 GA SHDN D9 bit 15 REGISTER 5-3: WRITE COMMAND REGISTER FOR MCP4801 (8-BIT DAC) W-x W-x W-x W-0 W-x 0 GA SHDN D7 bit 15 Where bit Write to DAC register ...

Page 23

... SCK config bits 0 SDI GA SHDN D9 LDAC V OUT Note dont care bits. FIGURE 5-2: Write Command for MCP4811 (10-bit DAC SCK config bits 0 SDI GA SHDN D7 LDAC V OUT Note dont care bits. ...

Page 24

... MCP4801/4811/4821 NOTES: DS22244B-page 24 2010 Microchip Technology Inc. ...

Page 25

... The power source supplying these devices should be as clean as possible. If the application circuit has separate digital and analog power supplies the device should reside on the analog plane. SS 2010 Microchip Technology Inc. MCP4801/4811/4821 6.3 Output Noise Considerations The voltage noise density (in µV/Hz) is illustrated in Figure 2-13 ...

Page 26

... OUT Gain selection ( Digital value of DAC (0-255) for MCP4801/MCP4802 n Digital value of DAC (0-1023) for MCP4811/MCP4812 Digital value of DAC (0-4095) for MCP4821/MCP4822  DAC bit resolution Decreasing Output Step Size to 0.82V (using the MCP49XX family ...

Page 27

... SPI 3-wire D  OUT 2.048 G ------ Gain selection ( Digital value of DAC (0-255) for MCP4801/MCP4802 n Digital value of DAC (0-1023) for MCP4811/MCP4812 Digital value of DAC (0-4095) for MCP4821/MCP4822 N DAC bit resolution ------------------ - Thevenin ...

Page 28

... OUT DAC R SPI 3-wire G Gain selection ( Digital value of DAC (0-255) for MCP4801/MCP4802 n Digital value of DAC (0-1023) for MCP4811/MCP4812 Digital value of DAC (0-4095) for MCP4821/MCP4822 N DAC bit resolution 2 1 The equation can be simplified to: R -------- - k and R ...

Page 29

... Offset Adjust – Gain selection ( DAC bit resolution D Digital value of DAC (0-255) for MCP4801 n Digital value of DAC (0-1023) for MCP4811 Digital value of DAC (0-4095) for MCP4821 R 2 ----- -  and ...

Page 30

... Gain selection ( Digital value of DAC (0-4096 Since resolution is desired. Since s V has a resolution of 1 mV, B OUTB by 1000 would OUTA s B needs to be 100 k. 1 Example 6- CC 2010 Microchip Technology Inc. , ...

Page 31

... OUT DAC SPI V CC 3-wire G Gain selection ( Digital value of DAC (0-255) for MCP4801/MCP4802 n Digital value of DAC (0-1023) for MCP4811/MCP4812 Digital value of DAC (0-4095) for MCP4821/MCP4822 N DAC bit resolution REF Load SENSE DS22244B-page 31 ...

Page 32

... MCP4801/4811/4821 NOTES: DS22244B-page 32 2010 Microchip Technology Inc. ...

Page 33

... DEVELOPMENT SUPPORT 7.1 Evaluation & Demonstration Boards The Mixed Signal PICtail Demo Board supports the MCP4801/4811/4821 family of devices. Refer to www.microchip.com for further information on this products capabilities and availability. 2010 Microchip Technology Inc. MCP4801/4811/4821 DS22244B-page 33 ...

Page 34

... MCP4801/4811/4821 NOTES: DS22244B-page 34 2010 Microchip Technology Inc. ...

Page 35

... 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. 2010 Microchip Technology Inc. MCP4801/4811/4821 Example: AHS 010 25 Example: 4801E 010256 Example: MCP4821 E/P 256 e 3 1010 Example: MCP4811E SN 1010 e 3 256 ) e 3 DS22244B-page 35 ...

Page 36

... MCP4801/4811/4821 /HDG 3ODVWLF 'XDO )ODW 1R /HDG 3DFNDJH 0& ± 1RWH D N NOTE TOP VIEW A3 1RWHV DS22244B-page 36 PP %RG >') EXPOSED PAD BOTTOM VIEW A NOTE NOTE 2010 Microchip Technology Inc. ...

Page 37

... Microchip Technology Inc. MCP4801/4811/4821 PP %RG >')1@ DS22244B-page 37 ...

Page 38

... MCP4801/4811/4821 /HDG 3ODVWLF 0LFUR 6PDOO 2XWOLQH 3DFNDJH 06 >0623@ 1RWH D N NOTE 1RWHV DS22244B-page φ L 2010 Microchip Technology Inc. ...

Page 39

... Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging 2010 Microchip Technology Inc. MCP4801/4811/4821 DS22244B-page 39 ...

Page 40

... MCP4801/4811/4821 /HDG 3ODVWLF 'XDO ,Q /LQH 3 ± 1RWH N NOTE 1RWHV DS22244B-page 40 PLO %RG >3', 2010 Microchip Technology Inc. ...

Page 41

... N NOTE 1RWHV 2010 Microchip Technology Inc. MCP4801/4811/4821 PP %RG >62,& φ α c β DS22244B-page 41 ...

Page 42

... MCP4801/4811/4821 /HDG 3ODVWLF 6PDOO 2XWOLQH 61 ± 1DUURZ 1RWH DS22244B-page 42 PP %RG >62,&@ 2010 Microchip Technology Inc. ...

Page 43

... APPENDIX A: REVISION HISTORY Revision A (April 2010) Original Release of this Document. Revision B (April 2010) Corrected the Related Products table on page 1. 2010 Microchip Technology Inc. MCP4801/4811/4821 DS22244B-page 43 ...

Page 44

... MCP4801/4811/4821 NOTES: DS22244B-page 44 2010 Microchip Technology Inc. ...

Page 45

... Microchip Technology Inc. MCP4801/4811/4821 Examples: a) MCP4801-E/MC: b) MCP4801T-E/MC: Extended temperature, c) MCP4801-E/MS: d) MCP4801T-E/MS: Extended temperature, e) MCP4801-E/P: f) MCP4801-E/SN: g) MCP4801T-E/SN: (Extended) a) MCP4811-E/MC: b) MCP4811T-E/MC: Extended temperature, c) MCP4811-E/MS: d) MCP4811T-E/MS: Extended temperature, e) MCP4811-E/P: f) MCP4811-E/SN: g) MCP4811T-E/SN: a) MCP4821-E/MC: b) MCP4821T-E/MC: Extended temperature, c) MCP4821-E/MS: d) MCP4821T-E/MS: Extended temperature, e) MCP4821-E/P: f) MCP4821-E/SN: ...

Page 46

... MCP4801/4811/4821 NOTES: DS22244B-page 46 2010 Microchip Technology Inc. ...

Page 47

... PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, UniWinDriver, 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. © 2010, Microchip Technology Incorporated, Printed in the U ...

Page 48

... 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 2010 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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