MCP4921-E/SN Microchip Technology, MCP4921-E/SN Datasheet

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MCP4921-E/SN

Manufacturer Part Number
MCP4921-E/SN
Description
IC DAC 12BIT SNGL W/SPI 8SOIC
Manufacturer
Microchip Technology
Datasheets

Specifications of MCP4921-E/SN

Number Of Converters
1
Package / Case
8-SOIC (3.9mm Width)
Settling Time
4.5µs
Number Of Bits
12
Data Interface
Serial, SPI™
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Resolution
12 bit
Interface Type
Serial (3-Wire, SPI, Microwire)
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.7 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Package
8SOIC N
Architecture
Resistor-String
Digital Interface Type
Serial (3-Wire, SPI, Microwire)
Number Of Outputs Per Chip
1
Output Type
Voltage
Full Scale Error
1 %FSR
Integral Nonlinearity Error
±12 LSB
Maximum Settling Time
4.5(Typ) us
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power Dissipation (max)
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCP4921-E/SN
Manufacturer:
MICROCH
Quantity:
10
Part Number:
MCP4921-E/SN
Manufacturer:
Microchip Technology
Quantity:
32 404
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
• 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
 2010 Microchip Technology Inc.
MCP4801
MCP4811
MCP4821
MCP4802
MCP4812
MCP4822
MCP4901
MCP4911
MCP4921
MCP4902
MCP4912
MCP4922
Note: The products listed here have similar AC/DC
performances.
with LDAC Pin
P/N
8/10/12-Bit Voltage Output Digital-to-Analog Converter
Resolution
DAC
10
12
10
12
10
12
10
12
8
8
8
8
Channels
No. of
1
1
1
2
2
2
1
1
1
2
2
2
MCP4901/4911/4921
with SPI Interface
Reference
(2.048V)
External
Voltage
Internal
(V
REF
)
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
(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
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
temperature, pressure and humidity) are required.
The MCP4901/4911/4921 devices are available in the
PDIP, SOIC, MSOP and DFN packages.
Package Types
REF
8-Pin PDIP, SOIC, MSOP
SCK
V
SDI
CS
DD
* Includes Exposed Thermal Pad (EP); see
or 2*V
devices
1
2
3
4
REF
MCP4901: 8-bit single DAC
MCP4911: 10-bit single DAC
MCP4921: 12-bit single DAC
by setting the gain selection option bit
include
8
7
6
5
V
V
V
LDAC
OUT
SS
REF
double-buffered
SCK
V
SDI
CS
DD
DFN-8 (2x3)
4
1
2
3
DS22248A-page 1
EP
9
Table
8
6
5
registers,
7
*
V
V
V
LDAC
OUT
SS
REF
3-1.

MCP4921-E/SN Summary of contents

Page 1

... 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

... 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.  2010 Microchip Technology Inc. MCP4901/4911/4921 † ...

Page 4

... 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

... 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 /°C OS Coefficient Gain Error g E G/°C Gain Error Temperature ...

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

... IDLE 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

... A T -40 — +125 ° -65 — +150 °C A  — 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

... Note: Unless otherwise indicated +25° 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 0 1024 2048 3072 Code (Decimal) FIGURE 2-1: DNL vs. Code (MCP4921). 0.2 0.1 0 -0.1 -0.2 0 1024 2048 3072 Code (Decimal) 125C FIGURE 2-2: DNL vs. Code and Temperature (MCP4921). 0.4 0.3 ...

Page 10

... 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. Code and ...

Page 11

... Code FIGURE 2-14: 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 151 156 161 166 171 176 181 186 191 196 201 ...

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 ...

Page 14

... Rise Time OUT DS22248A-page 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

... OUT REF 600 580 560 540 520 500 480 460 440 420 400 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 D = 1696 -90 ...

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) ...

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

... V provide additional transient immunity 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) ...

Page 25

... SCK config bits GA SHDN D11 D10 SDI BUF 0 LDAC V OUT FIGURE 5-1: Write Command for MCP4921 (12-bit DAC SCK config bits 0 BUF SDI GA SHDN D9 LDAC V OUT FIGURE 5-2: Write Command for MCP4911 (10-bit DAC). Note: X are don’t care bits SCK ...

Page 26

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

Page 27

... These capacitors should be placed as close to the device power pin ( possible (within 4 mm). 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

... G = 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 is available with ...

Page 29

... MCP4912 MCP4922 V V REF DD DAC 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  Equivalent ---------------------------------------------------- - 23 ...

Page 30

... R 4 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. R ---------------------- -  ...

Page 31

... EXAMPLE 6-4: BIPOLAR VOLTAGE SOURCE WITH SELECTABLE GAIN AND OFFSET.  2010 Microchip Technology Inc. MCP4901/4911/4921 This circuit is typically used in Multiplier mode and is ideal for linearizing a sensor whose slope and offset varies. Refer to Section 6.9 “Using Multiplier Mode” for more information on Multiplier mode. ...

Page 32

... DS22248A-page 32 1. Calculate the resolution needed: 4.1V/1 µV = 4.1x 10 22-bit resolution is desired. Since DNL = ±0.75 LSB, this design can be done with the MCP4921 or MCP4922. 2. Since the DAC 1 mV, its output only needs to be “pulled” 1/1000 to meet the 1 µV target. Dividing V ...

Page 33

... DAC's setting under known sensor conditions. would sense 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 DS22248A-page 33 ...

Page 34

... If the gain selection bit is configured for 1x mode (<GA> = 1), the resulting input signal will be attenuated n by D/2 . With the 12-bit DAC (MCP4921 or MCP4922), if the gain is configured for 2x mode (<GA> = 0), codes less than 2048 attenuate the signal, while codes greater than 2048 gain the signal. ...

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 product’s 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

... 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C to +125C Package MC = 8-Lead Plastic Dual Flat, No Lead Package - 2x3x0 ...

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. ...

Page 50

... Fax: 886-3-6578-370 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 Tel: 33-1-69-53-63-20 ...

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