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MCP4911 Datasheet

Download or read online Microchip Technology MCP4911 8/10/12-Bit Voltage Output Digital-To-Analog Converter With SPI Interface pdf datasheet.



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MCP4901/4911/4921
8/10/12-Bit Voltage Output Digital-to-Analog Converter
Features
• MCP4901: 8-Bit Voltage Output DAC
• MCP4911: 10-Bit Voltage Output DAC
• MCP4921: 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
• External Voltage Reference Input
• External Multiplier Mode
• 2.7V to 5.5V Single-Supply Operation
• Extended Temperature Range: -40° C to +125° C
Applications
• Set Point or Offset Trimming
• Precision Selectable Voltage Reference
• Motor Control Feedback Loop
• Digitally-Controlled Multiplier/Divider
• Calibration of Optical Communication Devices
Related Products
DAC
No. of
P/N
Resolution
Channels
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: The products listed here have similar AC/DC
performances.
 2010 Microchip Technology Inc.
with SPI Interface
Description
The MCP4901/4911/4921 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 user
can configure the full-scale range of the device to be
V
or 2*V
REF
REF
(gain of 1 of 2).
The user can shut down the device by setting the Con-
figuration Register bit. In Shutdown mode, most of the
internal circuits are turned off for power savings, and
the output amplifier is configured to present a known
high resistance output load (500 ktypical.
The
devices
allowing synchronous updates 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 Differential Non-Linear-
ity (DNL) error and fast settling time. These devices are
specified over the extended temperature range
(+125° C).
The devices provide high accuracy and low noise
performance for consumer and industrial applications
where calibration or compensation of signals (such as
Voltage
temperature, pressure and humidity) are required.
Reference
(V
)
The MCP4901/4911/4921 devices are available in the
REF
PDIP, SOIC, MSOP and DFN packages.
Package Types
Internal
(2.048V)
8-Pin PDIP, SOIC, MSOP
V
1
DD
2
CS
3
SCK
External
4
SDI
MCP4901: 8-bit single DAC
MCP4911: 10-bit single DAC
MCP4921: 12-bit single DAC
* Includes Exposed Thermal Pad (EP); see
by setting the gain selection option bit
include
double-buffered
registers,
*
DFN-8 (2x3)
V
V
V
8
1
8
OUT
DD
OUT
V
7
V
2
7
CS
EP
SS
SS
9
V
6
V
3
6
SCK
REF
REF
5
4
5
SDI
LDAC
LDAC
Table
3-1.
DS22248A-page 1

Summary of Contents

Page 1

... MCP4901/4911/4921 8/10/12-Bit Voltage Output Digital-to-Analog Converter Features MCP4901: 8-Bit Voltage Output DAC MCP4911: 10-Bit Voltage Output DAC MCP4921: 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

... MCP4901/4911/4921 Block Diagram LDAC V REF Buffer DS22248A-page 2 CS SDI SCK Interface Logic Power-on Reset Input Register DAC Register String DAC Gain Output Logic Op Amp Output Logic V OUT 2010 Microchip Technology Inc. ...

Page 3

... DD Supply Current I DD Software Shutdown Current I SHDN_SW Power-On-Reset Threshold V POR DC Accuracy MCP4901 Resolution n INL Error INL DNL DNL MCP4911 Resolution n INL Error INL DNL DNL MCP4921 Resolution n INL Error INL DNL DNL Note 1: Guaranteed monotonic by design over all codes. 2: This parameter is ensured by design, and not 100% tested. ...

Page 4

... Unbuffered 2.5V ±0.2 Vp-p, REF Unbuffered 2.5V ±0.2Vp-p, REF Frequency 1 kHz Accuracy is better than 1 LSb for 40 mV) OUT DD Within 1/2 LSB of final value from 1/4 to 3/4 full-scale range 1 LSB change around major carry (0111...1111 to 1000...0000) 2010 Microchip Technology Inc. ...

Page 5

... Input Voltage V DD Input Current I DD Software Shutdown Current I SHDN_SW Power-on Reset Threshold V POR DC Accuracy MCP4901 Resolution n INL Error INL DNL DNL MCP4911 Resolution n INL Error INL DNL DNL MCP4921 Resolution n INL Error INL DNL DNL Offset Error V OS Offset Error Temperature V /° ...

Page 6

... Output Buffer Gain Conditions V 2.5V ±0.1Vp-p, REF Frequency 1 kHz Accuracy is better than 1 LSb for 40 mV) OUT DD Within 1/2 LSB of final value from 1/4 to 3/4 full-scale range 1 LSB change around major carry (0111...1111 to 1000...0000) 2010 Microchip Technology Inc. ...

Page 7

... Note 1: This parameter is ensured by design and not 100% tested CSSR Mode 1,1 SCK Mode 0 MSB in LDAC FIGURE 1-1: SPI Input Timing Data. 2010 Microchip Technology Inc. MCP4901/4911/4921 2.7V 5.5V Min Typ Max Units 0.7 V — 0 — ...

Page 8

... -65 150 ° 68 ° C/W JA 90 ° C/W JA 150 ° C/W JA 211 ° C exceed the maximum junction temperature GND. SS Conditions Note 1 2010 Microchip Technology Inc. ...

Page 9

... DNL vs. Code and Temperature (MCP4921). 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 0 1024 2048 3072 Code (Decimal) 1 FIGURE 2-3: DNL vs. Code and V Gain1 (MCP4921). 2010 Microchip Technology Inc. MCP4901/4911/4921 5V 0V 2.048V, Gain 2x REF 0.0766 0.0764 0.0762 0.076 0.0758 0.0756 0.0754 0.0752 0.075 -40 4096 FIGURE 2-4: Temperature (MCP4921) ...

Page 10

... FIGURE 2-11: REF Temperature (MCP4911). 1.5 4 5.5 0.5 -0.5 -1.5 -2.5 -3.5 4096 0 128 FIGURE 2-12: REF Temperature (MCP4911 k 100 pF 1024 2048 3072 4096 Code (Decimal) INL vs. Code (MCP4921). (Figure 2-10) for o o Temp - 125 C 256 384 512 640 768 896 1024 Code DNL vs ...

Page 11

... INL vs. Code and Temperature (MCP4901). 210 190 170 150 130 110 -40 - Ambient Temperature (° C) FIGURE 2-15: I vs. Temperature and 2010 Microchip Technology Inc. MCP4901/4911/4921 5V 0V 2.048V, Gain REF FIGURE 2-16: 2.7V). 9 ...

Page 12

... FIGURE 2-22: Temperature and 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) V High Threshold vs 5.5V 5.0V 4.0V 3.0V 2. 100 120 Ambient Temperature (ºC) V Low Threshold vs 2010 Microchip Technology Inc. ...

Page 13

... Ambient Temperature (ºC) FIGURE 2-25: V High Limit vs. OUT Temperature and 2010 Microchip Technology Inc. MCP4901/4911/4921 5V 0V 2.048V, Gain REF 0.0045 V DD 5.5V 0.004 5.0V 0.0035 4.0V 0.003 3.0V 0.0025 2.7V 0.002 0.0015 ...

Page 14

... V 2.048V, Gain REF V OUT LDAC Time (1 µs/div) FIGURE 2-32 OUT SCK LDAC Time (1 µs/div) FIGURE 2-33: V Shutdown. Frequency (Hz) FIGURE 2-34: PSRR vs. Frequency k 100 pF Rise Time OUT Rise Time Exit OUT 2010 Microchip Technology Inc. ...

Page 15

... Worst Case Codes (decimal) FIGURE 2-36 Bandwidth vs. Worst Codes. 2010 Microchip Technology Inc. MCP4901/4911/4921 5V 0V 2.50V, Gain REF 160 D 416 D 672 - 928 D 1184 D 1440 ...

Page 16

... MCP4901/4911/4921 NOTES: DS22248A-page 16 2010 Microchip Technology Inc. ...

Page 17

... Serial Clock Input (SCK) SCK is the SPI compatible serial clock input. 3.4 Serial Data Input (SDI) SDI is the SPI compatible serial data input. 2010 Microchip Technology Inc. MCP4901/4911/4921 Table 3-1. Symbol V Supply Voltage Input (2.7V to 5.5V) DD ...

Page 18

... MCP4901/4911/4921 NOTES: DS22248A-page 18 2010 Microchip Technology Inc. ...

Page 19

... GENERAL OVERVIEW The MCP4901, MCP4911 and MCP4921 are single channel voltage output 8-bit, 10-bit and 12-bit DAC devices, respectively. These devices include a V input buffer, a rail-to-rail output amplifier, shutdown and reset management circuitry. The devices use an SPI serial communication interface and operate with a single-supply voltage from 2 ...

Page 20

... OUT Transients 0 1 FIGURE 4-3: Typical Transient Response. input to REF ), DD ) during device operation. DD pin, can DD V POR POR Transient Duration Time Transients above the below the V (V) DD POR 2010 Microchip Technology Inc. ...

Page 21

... When the device is changed from Shutdown to Active mode, the output settling time takes less than 10 µs, but more than the standard active mode settling time (4.5 µs). 2010 Microchip Technology Inc. MCP4901/4911/4921 OP Amp Power-Down ...

Page 22

... MCP4901/4911/4921 NOTES: DS22248A-page 22 2010 Microchip Technology Inc. ...

Page 23

... 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. MCP4901/4911/4921 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 24

... MCP4901/4911/4921 REGISTER 5-1: WRITE COMMAND REGISTER FOR MCP4921 (12-BIT DAC) W-x W-x W-x W-0 W-x 0 BUF GA SHDN D11 bit 15 REGISTER 5-2: WRITE COMMAND REGISTER FOR MCP4911 (10-BIT DAC) W-x W-x W-x W-0 W-x 0 BUF GA SHDN D9 bit 15 REGISTER 5-3: WRITE COMMAND REGISTER FOR MCP4901 (8-BIT DAC) W-x W-x W-x W-0 W-x 0 BUF GA SHDN D7 bit 15 Where: bit Write to DAC register ...

Page 25

... Write Command for MCP4921 (12-bit DAC SCK config bits SDI 0 BUF GA SHDN D9 LDAC V OUT FIGURE 5-2: Write Command for MCP4911 (10-bit DAC). Note: X are dont care bits SCK config bits SDI GA SHDN D7 0 BUF LDAC V OUT FIGURE 5-3: Write Command for MCP4901(8-bit DAC). Note: X are don’ ...

Page 26

... MCP4901/4911/4921 NOTES: DS22248A-page 26 2010 Microchip Technology Inc. ...

Page 27

... DD The power source supplying these devices should be as clean as possible. If the application circuit has separate digital and analog power supplies should reside on the analog plane. SS 2010 Microchip Technology Inc. MCP4901/4911/4921 µ 0.1 µ ...

Page 28

... Gain selection ( Digital value of DAC (0-255) for MCP4901/MCP4902 n Digital value of DAC (0-1023) for MCP4911/MCP4912 Digital value of DAC (0-4095) for MCP4921/MCP4922  DAC Bit Resolution  Decreasing Output Step Size to 0.82V or use a voltage divider on the is an option if the V ...

Page 29

... SPI 3 D  OUT V G ------ REF Gain selection ( Digital value of DAC (0-255) for MCP4901/MCP4902 n Digital value of DAC (0-1023) for MCP4911/MCP4912 Digital value of DAC (0-4095) for MCP4921/MCP4922 N DAC Bit Resolution ------------------ Thevenin ...

Page 30

... SPI Gain selection ( Digital value of DAC (0 255) for MCP4901/MCP4902 n Digital value of DAC (0 1023) for MCP4911/MCP4912 Digital value of DAC (0 4095) for MCP4921/MCP4922 N DAC Bit Resolution 4. Next, solve for R 4096, knowing that the output needs to be 2.05V. ...

Page 31

... DAC (Offset Adjust 0.1uF V – Gain selection ( DAC Bit Resolution Digital value of DAC (0-255) for MCP4901/MCP4902 Digital value of DAC (0-1023) for MCP4911/MCP4912 Digital value of DAC (0-4095) for MCP4912/MCP4922 and ------------------ ...

Page 32

... The resulting transfer function is not perfectly linear, as shown in the equation CC 0.1 µ Gain selection ( Digital value of DAC (0-4096 Since s V has a resolution of B OUTB by 1000 OUTA needs to be 100 k. 1 Example 6- 2010 Microchip Technology Inc. ...

Page 33

... REF V V OUT DAC SPI V CC 3-wire G Gain select ( Digital value of DAC (0-255) for MCP4901/MCP4902 n Digital value of DAC (0-1023) for MCP4911/MCP4912 Digital value of DAC (0-4095) for MCP4921/MCP4922 N DAC Bit Resolution REF Load R SENSE ...

Page 34

... DACs output can utilize any of the examples from 6-1 to 6-6, depending on the application requirements. Example 6 illustration of how the DAC can operate in a motor control feedback loop. (a) Single Output DAC: MCP4901 MCP4911 MCP4921 (b) Dual Output DAC: MCP4902 MCP4912 MCP4922 EXAMPLE 6-7: MULTIPLIER MODE USING V ...

Page 35

... DEVELOPMENT SUPPORT 7.1 Evaluation & Demonstration Boards The Mixed Signal PICtail Board supports the MCP4901/4911/4921 family of devices. Please refer to www.microchip.com for further information on this products capabilities and availability. 2010 Microchip Technology Inc. MCP4901/4911/4921 DS22248A-page 35 ...

Page 36

... MCP4901/4911/4921 NOTES: DS22248A-page 36 2010 Microchip Technology Inc. ...

Page 37

... Note: 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. MCP4901/4911/4921 Example: AHS 010 ...

Page 38

... MCP4901/4911/4921 /HDG 3ODVWLF 'XDO )ODW 1R /HDG 3DFNDJH 0& ± 1RWH D N NOTE TOP VIEW A3 1RWHV DS22248A-page 38 PP %RG >') EXPOSED PAD BOTTOM VIEW A NOTE NOTE 2010 Microchip Technology Inc. ...

Page 39

... Microchip Technology Inc. MCP4901/4911/4921 PP %RG >')1@ DS22248A-page 39 ...

Page 40

... MCP4901/4911/4921 /HDG 3ODVWLF 0LFUR 6PDOO 2XWOLQH 3DFNDJH 06 >0623@ 1RWH D N NOTE 1RWHV DS22248A-page φ L 2010 Microchip Technology Inc. ...

Page 41

... Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging 2010 Microchip Technology Inc. MCP4901/4911/4921 DS22248A-page 41 ...

Page 42

... MCP4901/4911/4921 /HDG 3ODVWLF 6PDOO 2XWOLQH 61 ± 1DUURZ 1RWH N NOTE 1RWHV DS22248A-page 42 PP %RG >62,& φ α c β 2010 Microchip Technology Inc. ...

Page 43

... Microchip Technology Inc. MCP4901/4911/4921 PP %RG >62,&@ DS22248A-page 43 ...

Page 44

... MCP4901/4911/4921 /HDG 3ODVWLF 'XDO ,Q /LQH 3 ± 1RWH N NOTE 1RWHV DS22248A-page 44 PLO %RG >3', 2010 Microchip Technology Inc. ...

Page 45

... APPENDIX A: REVISION HISTORY Revision A (April 2010) Original Release of this Document. 2010 Microchip Technology Inc. MCP4901/4911/4921 DS22248A-page 45 ...

Page 46

... MCP4901/4911/4921 NOTES: DS22248A-page 46 2010 Microchip Technology Inc. ...

Page 47

... MCP4901: 8-Bit Voltage Output DAC MCP4901T: 8-Bit Voltage Output DAC (Tape and Reel) MCP4911: 10-Bit Voltage Output DAC MCP4911T: 10-Bit Voltage Output DAC (Tape and Reel) MCP4921: 12-Bit Voltage Output DAC MCP4921T: 12-Bit Voltage Output DAC (Tape and Reel) Temperature Range E -40 ...

Page 48

... MCP4901/4911/4921 NOTES: DS22248A-page 48 2010 Microchip Technology Inc. ...

Page 49

... 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 50

... 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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