MCP4922-E/SL Microchip Technology Inc., MCP4922-E/SL Datasheet

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MCP4922-E/SL

Manufacturer Part Number
MCP4922-E/SL
Description
DUAL 12-BIT DAC WITH SPI INTERACE
Manufacturer
Microchip Technology Inc.
Datasheet

Specifications of MCP4922-E/SL

Lead Free Status / Rohs Status
RoHS Compliant part Electrostatic Device

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Features
• 12-Bit Resolution
• ±0.2 LSB DNL (typ)
• ±2 LSB INL (typ)
• Single or Dual Channel
• Rail-to-Rail Output
• SPI™ Interface with 20 MHz Clock Support
• Simultaneous Latching of the Dual DACs w/LDAC
• Fast Settling Time of 4.5 µs
• Selectable Unity or 2x Gain Output
• 450 kHz Multiplier Mode
• External V
• 2.7V to 5.5V Single-Supply Operation
• Extended Temperature Range: -40°C to +125°C
Applications
• Set Point or Offset Trimming
• Sensor Calibration
• Digitally-Controlled Multiplier/Divider
• Portable Instrumentation (Battery-Powered)
• Motor Feedback Loop Control
Block Diagram
© 2007 Microchip Technology Inc.
V
REF
A
Logic
Gain
Buffer
REF
V
OUTA
Register A Register B
Register
Input
DAC
CS
Input
DAC
String
Interface Logic
A
A
Op Amps
SDI
Output
Output
SHDN
Logic
12-Bit DAC with SPI™ Interface
Register
Input
DAC
DAC
String
SCK
B
B
V
OUTB
LDAC
Power-on
Logic
Reset
Gain
Buffer
AV
V
B
V
REF
DD
SS
MCP4921/4922
Description
The Microchip Technology Inc. MCP492X are 2.7 –
verters (DACs) with optional 2x buffered output and SPI
interface.
The MCP492X are DACs that provide high accuracy
and low noise performance for industrial applications
where calibration or compensation of signals (such as
temperature, pressure and humidity) are required.
The MCP492X are available in the extended tempera-
ture range and PDIP, SOIC, MSOP and TSSOP
packages.
The MCP492X devices utilize a resistive string archi-
tecture, 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. The MCP492X include double-
buffered inputs, allowing simultaneous updates using
the LDAC pin.
Power-On Reset (POR) circuit to ensure reliable
power-up.
Package Types
5.5V, low-power, low DNL, 12-Bit Digital-to-Analog Con-
14-Pin PDIP, SOIC, TSSOP
8-Pin PDIP, SOIC, MSOP
SCK
V
SCK
SDI
V
CS
SDI
DD
NC
CS
NC
NC
DD
These devices also incorporate a
1
2
3
4
1
2
3
4
5
6
7
14
13
12
11
10
9
8
8
7
6
5
V
V
AV
V
V
SHDN
LDAC
V
AV
V
LDAC
OUTA
REFA
REFB
OUTB
OUTA
REFA
SS
SS
DS21897B-page 1

Related parts for MCP4922-E/SL

MCP4922-E/SL Summary of contents

Page 1

... OUTB SHDN © 2007 Microchip Technology Inc. MCP4921/4922 Description The Microchip Technology Inc. MCP492X are 2.7 – 5.5V, low-power, low DNL, 12-Bit Digital-to-Analog Con- verters (DACs) with optional 2x buffered output and SPI interface. The MCP492X are DACs that provide high accuracy ...

Page 2

... Electrical Specifications: Unless otherwise indicated GND 100 -40 to +85°C. Typical values at +25° Parameters Sym Power Requirements Input Voltage V DD Input Current - MCP4921 I DD Input Current - MCP4922 Hardware Shutdown Current I SHDN Software Shutdown Current I SHDN_SW Power-on-Reset Threshold V POR DC Accuracy Resolution n INL Error INL DNL ...

Page 3

... GND 100 -40 to +85°C. Typical values at 25° Parameters Sym Power Requirements Input Voltage V DD Input Current - MCP4921 I DD Input Current - MCP4922 Hardware Shutdown Current I SHDN Software Shutdown Current I SHDN_SW Power-On Reset threshold V POR DC Accuracy Resolution n INL Error INL DNL ...

Page 4

... Electrical Specifications: Unless otherwise indicated GND 100 pF. Typical values at +125°C by characterization or simulation. L Parameters Sym Power Requirements Input Voltage V DD Input Current - MCP4921 I DD Input Current - MCP4922 Hardware Shutdown Current I SHDN Software Shutdown Current I SHDN_SW Power-On Reset threshold V POR DC Accuracy Resolution n INL Error ...

Page 5

... Settling Time t settling Dynamic Performance DAC to DAC Crosstalk Major Code Transition Glitch Digital Feedthrough Analog Crosstalk Note 1: By design, not production tested. 2: Too small to quantify. © 2007 Microchip Technology Inc. MCP4921/4922 = 5V 0V 2.048V, output buffer gain ( REF Min Typ Max Units — ...

Page 6

... V V SHDN = LDAC = CS = SDI = SCK + REF 5.0V +25° MHz (Note 1) cLK = +25°C (Note 1) A Note 1 Note 1 Applies only when CS falls with CLK high. (Note 1) Note 1 Note 1 Note 1 Note 1 Note 1 Note 1 Note 1 t CSH t IDLE t CHS LSB © 2007 Microchip Technology Inc. ...

Page 7

... Thermal Resistance, 14L-PDIP Thermal Resistance, 14L-SOIC Thermal Resistance, 14L-TSSOP Note 1: The MCP492X family of DACs operate over this extended temperature range, but with reduced performance. Operation in this range must not cause T 150°C. © 2007 Microchip Technology Inc. = +2.7V to +5.5V Sym Min Typ Max ...

Page 8

... FIGURE 2-4: Temperature. 0.35 0.3 0.25 0.2 0.15 0.1 0. 4096 85C 25C FIGURE 2-5: Reference. 4096 5.5 . REF = 5 kΩ 100 pF - 100 120 Ambient Temperature (ºC) Absolute DNL vs. Ambient Voltage Reference (V) Absolute DNL vs. Voltage © 2007 Microchip Technology Inc. ...

Page 9

... Ambient Temperature (ºC) FIGURE 2-7: Absolute INL vs. Ambient Temperature. 3 2.5 2 1 Voltage Reference (V) FIGURE 2-8: Absolute INL vs. V © 2007 Microchip Technology Inc. MCP4921/4922 = 0V 2.048V, Gain = REF 4096 0 FIGURE 2- 100 120 FIGURE 2-10: Note: Single device graph (Figure 2-10) for illustration of 64 code effect ...

Page 10

... Ambient FIGURE 2-14: Temperature and Histogram FIGURE 2-15 2.7V Histogram FIGURE 2-16 5.0V). DD 5.5V 5.0V 4.0V 3.0V 2. 100 120 Ambient Temperature (ºC) MCP4922 I vs. Ambient (μA) DD MCP4922 I Histogram DD I (μA) DD MCP4922 I Histogram DD © 2007 Microchip Technology Inc. ...

Page 11

... Ambient Temperature and V DD 0.12 0.1 0.08 0.06 0.04 0.02 0 -0.02 -40 - Ambient Temperature (ºC) FIGURE 2-19: Offset Error vs. Ambient Temperature and © 2007 Microchip Technology Inc 0V 2.048V, Gain = REF -0.08 5.5V 5.0V -0.1 4.0V -0.12 3.0V 2.7V -0. -0.16 -40 -20 100 120 FIGURE 2-20: ...

Page 12

... V 2.0 DD 1.0 Output Shorted FIGURE 2-28 kΩ 100 pF 5.5V 5.0V 4.0V 3.0V 2. 100 120 V Low Limit vs. Ambient OUT . V DD 5.5V 5.0V 4.0V 3.0V 2. 100 120 I High Short vs. OUT . (mA) OUT Gain = 1. OUT OUT © 2007 Microchip Technology Inc. ...

Page 13

... OUT V OUT 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 50%. OUT © 2007 Microchip Technology Inc. MCP4921/4922 = 0V 2.048V, Gain = REF V OUT LDAC Time (1 µs/div) FIGURE 2-32 OUT SCK LDAC Time (1 µs/div) ...

Page 14

... D = 1952 D = 2208 D = 2464 D = 2720 -135 D = 2976 D = 3232 D = 3488 D = 3744 -180 100 1,000 FIGURE 2-37 kΩ 100 pF 160 D = 416 D = 672 D = 928 D = 1184 D = 1440 D = 1696 D = 1952 D = 2208 D = 2464 D = 2720 D = 2976 D = 3232 D = 3488 D = 3744 1,000 Frequency (kHz) Phase Shift. © 2007 Microchip Technology Inc. ...

Page 15

... PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE MCP4921 MCP4922 Pin No. Pin No — — 6 — — 9 — 10 — 3.1 Positive Power Supply Input ( the positive power supply input. The input power DD supply is relative to AV and can range from 2 ...

Page 16

... LSB, excluding the effects of offset error. REF INL < 0 Actual transfer function Ideal transfer function INL < 0 DAC Output INL Accuracy. Actual transfer function Ideal transfer function Wide code, > 1 LSB Narrow code < 1 LSB DAC Output DNL Accuracy. © 2007 Microchip Technology Inc. ...

Page 17

... Shutdown mode can be entered by using either hard- input to bypass ware or software commands. The hardware pin (SHDN) is only available on the MCP4922. During Shutdown mode, the supply current is isolated from most of the internal circuitry. The serial interface remains active, thus allowing a write command to bring the device out of Shutdown mode ...

Page 18

... CS occurs prior, shifting of data into the input registers will be aborted. W-0 W-x W-x W-x SHDN D11 D10 D9 W-x W-x W Unimplemented bit, read as ‘0’ bit is cleared ’s and DAC ’s outputs register. X W-x D8 bit 8 W-x W-x W bit bit is unknown © 2007 Microchip Technology Inc. ...

Page 19

... SCK config bits A/B BUF GA SHDN D11 D10 SDI LDAC V OUT FIGURE 5-1: Write Command. © 2007 Microchip Technology Inc data bits MCP4921/4922 (mode 1,1) (mode 0,0) DS21897B-page 19 ...

Page 20

... Particularly harsh environments may require shielding of critical signals. Breadboards and wire-wrapped boards are not recommended if low noise is desired. and 0.1 µF 0.1 µ SDI AV SDO SS SCK LDAC Typical Connection © 2007 Microchip Technology Inc. ...

Page 21

... V OUT trip EXAMPLE 6-1: Set Point or Threshold Calibration. © 2007 Microchip Technology Inc. 6.4.1.1 If the output range is reduced relative to AV reducing V range of 2.7V to REF put step. If the application is calibrating the threshold of a diode, transistor or resistor tied theshold range of 0.8V may be desired to provide 200 µ ...

Page 22

... The MCP492X’s low, ±0.75 (max.) DNL performance is critical to meet calibration accuracy in production CC+ sense trip 0.1 µ CC OUT ) ( ) + CC then creating REF SS Example 6-2 and Example 6-4 V CC+ Comparator V CC Gain select ( Digital value of DAC (0 – 4096 © 2007 Microchip Technology Inc. ...

Page 23

... REF kΩ and kΩ, the gain will be 0. © 2007 Microchip Technology Inc. Example 6-3 illustrates a simple bipolar voltage source configuration. R while R and R 3 offset. Note that R4 can be tied higher offset is desired. Note that a pull- could be used, instead of R REF desired ...

Page 24

... MCP4921/4922 6.6 Selectable Gain and Offset Bipolar Voltage Output Using A Dual DAC In some applications, precision digital control of the output range is desirable. Example 6-4 illustrates how to use the MCP4922 to achieve this in a bipolar or single-supply application REFA V OUTA MCP492X DAC REFB V OUTB MCP492X DAC SPI™ ...

Page 25

... EXAMPLE 6-5: Simple, Double-Precision DAC. © 2007 Microchip Technology Inc. 1. Calculate the resolution needed: 4.1V/1uV = 4.1e06. Since 2 resolution is desired. Since DNL = ±0.75 LSB, this design can be attempted with the MCP492X. 2. Since DAC its output only needs to be “pulled” 1/1000 to meet the 1 µV target. Dividing V ...

Page 26

... Examples 6-2 to 6-6, extends the b output range and power to meet the precise needs of the application. sense MCP492X V REF SPI™ EXAMPLE 6-7: and serially configure the REF = V (D/2048). OUT IN V RPM_SET V RPM OUT – V – sense Multiplier Mode. © 2007 Microchip Technology Inc. ...

Page 27

... Please www.microchip.com for further information on this products capabilities and availability. © 2007 Microchip Technology Inc. MCP4921/4922 7.2 Application Notes and Tech Briefs Application notes illustrating the performace and imple- mentation of the MCP492X are planned but currently not released. Please refer to www.microchip.com for ...

Page 28

... 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. DS21897B-page 28 Example: e 4921E 3 712256 Example: MCP4921 e E/P 3 256 0712 Example: MCP4921 e E/SN 3 0712 256 © 2007 Microchip Technology Inc. ...

Page 29

... Package Marking Information (Continued) 14-Lead PDIP (300 mil) XXXXXXXXXXXXXX XXXXXXXXXXXXXX YYWWNNN 14-Lead SOIC (150 mil) XXXXXXXXXX XXXXXXXXXX YYWWNNN 14-Lead TSSOP XXXXXX YYWW NNN © 2007 Microchip Technology Inc. MCP4921/4922 Example: e MCP4922E/P 3 0712256 Example MCP4922E/SL 0712256 Example: e 4922E/ST 3 0712 256 DS21897B-page 29 ...

Page 30

... A2 0.75 0.85 A1 0.00 – E 4.90 BSC E1 3.00 BSC D 3.00 BSC L 0.40 0.60 L1 0.95 REF φ 0° – c 0.08 – b 0.22 – Microchip Technology Drawing C04-111B φ L MAX 1.10 0.95 0.15 0.80 8° 0.23 0.40 © 2007 Microchip Technology Inc. ...

Page 31

... Pin 1 visual index feature may vary, but must be located with the hatched area. 2. § Significant Characteristic. 3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010" per side. 4. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. © 2007 Microchip Technology Inc ...

Page 32

... NOM MAX 8 1.27 BSC – 1.75 – – – 0.25 6.00 BSC 3.90 BSC 4.90 BSC – 0.50 – 1.27 1.04 REF – 8° – 0.25 – 0.51 – 15° – 15° Microchip Technology Drawing C04-057B © 2007 Microchip Technology Inc. ...

Page 33

... Pin 1 visual index feature may vary, but must be located with the hatched area. 2. § Significant Characteristic. 3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010" per side. 4. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. © 2007 Microchip Technology Inc ...

Page 34

... REF φ 0° c 0.17 b 0.31 α 5° β 5° h α c β MAX 14 – 1.75 – – – 0.25 – 0.50 – 1.27 – 8° – 0.25 – 0.51 – 15° – 15° Microchip Technology Drawing C04-065B © 2007 Microchip Technology Inc. ...

Page 35

... 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. © 2007 Microchip Technology Inc. MCP4921/4922 E E1 ...

Page 36

... MCP4921/4922 NOTES: DS21897B-page 36 © 2007 Microchip Technology Inc. ...

Page 37

... APPENDIX A: REVISION HISTORY Revision B (February 2007) This revision includes updates to the packaging diagrams. © 2007 Microchip Technology Inc. MCP4921/4922 DS21897B-page 37 ...

Page 38

... MCP4921/4922 NOTES: DS21897B-page 38 © 2007 Microchip Technology Inc. ...

Page 39

... Extended Temperature, 8LD PDIP package. a) MCP4922T-E/SL: Tape and Reel Extended Temperature, 14LD SOIC package. b) MCP4922T-E/ST: Tape and Reel Extended Temperature, 14LD TSSOP package. c) MCP4922-E/P: Extended Temperature, 14LD PDIP package. d) MCP4922-E/SL: Extended Temperature, 14LD SOIC package. e) MCP4922-E/ST: Extended Temperature, 14LD TSSOP package. DS21897B-page 39 ...

Page 40

... MCP4921/4922 NOTES: DS21897B-page 40 © 2007 Microchip Technology Inc. ...

Page 41

... Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights. © 2007 Microchip Technology Inc. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, K ...

Page 42

... 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 © 2007 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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