Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsData collecting ICsData acquisition IC - DA converter (DAC) SSOP 28

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8814

FEATURES DESCRIPTION

APPLICATIONS

DAC

D10

D11

D12

D13

D14

D15

2:4

Decode

SDO

SDI

CLK

DGND RS

MSB LDAC

GND

OUT

GND

OUT

GND

OUT

GND

OUT

A B C D

REF

Input

Power-On

Reset

DAC A

DAC B

DAC C

DAC D

DAC A

DAC B

DAC C

DAC D

DAC8814

SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006

Quad, Serial Input 16-Bit Multiplying Digital-to-Analog Converter

• Relative Accuracy: 1 LSB Max

The DAC8814 is a quad, 16-bit, current-output

• Differential Nonlinearity: 1 LSB Max

digital-to-analog converter (DAC) designed to

operate from a single +2.7-V to 5.0-V supply.

• 2-mA Full-Scale Current

with V

REF

= ± 10 V

The applied external reference input voltage V

REF

• 0.5- µ s Settling Time

determines the full-scale output current. An internal

feedback resistor (R

) provides temperature

• Midscale or Zero-Scale Reset

tracking for the full-scale output when combined with

• Four Separate 4Q Multiplying Reference

an external I-to-V precision amplifier.

Inputs

A doubled buffered serial data interface offers

• Reference Bandwidth: 10 MHz

high-speed, 3-wire, SPI and microcontroller

• Reference Dynamics: –105 dB THD

compatible inputs using serial data in (SDI), clock

• SPI™-Compatible 3-Wire Interface:

(CLK), and a chip-select ( CS). In addition, a serial

50 MHz

data out pin (SDO) allows for daisy-chaining when

• Double Buffered Registers Enable

multiple packages are used. A common

level-sensitive load DAC strobe ( LDAC) input allows

• Simultaneous Multichannel Change

simultaneous update of all DAC outputs from

• Internal Power-On Reset

previously loaded input registers. Additionally, an

• Industry-Standard Pin Configuration

internal power-on reset forces the output voltage to

zero at system turn on. An MSB pin allows system

reset assertion ( RS) to force all registers to zero

code when MSB = 0, or to half-scale code when

• Automatic Test Equipment

MSB = 1.

• Instrumentation

• Digitally-Controlled Calibration

The DAC8814 is available in an SSOP package.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

SPI is a trademark of Motorola, Inc.

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (27 pages)

PAGE 1
DA C8 814 DAC8814 SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 Quad, Serial Input 16-Bit Multiplying Digital-to-Analog Converter FEATURES DESCRIPTION • • • The DAC8814 is a quad, 16-bit, current-output digital-to-analog converter (DAC) designed to operate from a single +2.7-V to 5.0-V supply. • • • • • • • • • • Relative Accuracy: 1 LSB Max Differential Nonlinearity: 1 LSB Max 2-mA Full-Scale Current with VREF = ±10 V 0.
PAGE 2
DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
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DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 ELECTRICAL CHARACTERISTICS VDD = 2.7 V to 5.5 V; IOUTX = Virtual GND, AGNDX = 0 V, VREFA, B, C, D = 10 V, TA = full operating temperature range, unless otherwise noted. DAC8814 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT STATIC PERFORMANCE (1) Resolution 16 Bits INL DAC8814B ±4 LSB INL DAC8814C ±1 LSB Differential nonlinearity DNL DAC8814B ±1.
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DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 ELECTRICAL CHARACTERISTICS (continued) VDD = 2.7 V to 5.5 V; IOUTX = Virtual GND, AGNDX = 0 V, VREFA, B, C, D = 10 V, TA = full operating temperature range, unless otherwise noted. DAC8814 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT SUPPLY CHARACTERISTICS Power supply range Positive supply current Power dissipation Power supply sensitivity VDD 2.7 5.5 V 2 5 µA 1 2.5 µA Logic inputs = 0 V 0.0275 mW ∆VDD = ±5% 0.
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DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 PIN CONFIGURATIONS DB Package (TOP VIEW) AGNDA IOUTA VREFA RFBA MSB RS VDD CS CLK SDI RFBB VREFB IOUTB AGNDB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 AGNDD IOUTD VREFD RFBD DGND VSS(1) AGNDF LDAC SDO (1) NC RFBC VREFC IOUTC AGNDC NOTE (1): No internal connection PIN DESCRIPTION PIN NAME 1, 14, 15, 28 AGNDA, AGNDB, AGNDC, AGNDD DAC A, B, C, D Analog ground.
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DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 TYPICAL CHARACTERISTICS: VDD = +5 V At TA = +25°C, +VDD = +5 V, unless otherwise noted. Channel A LINEARITY ERROR vs DIGITAL INPUT CODE 1.0 1.0 TA = +25_C 0.8 0.6 0.6 0.4 0.4 0.2 0 −0.2 TA = +25_C 0.8 DNL (LSB) INL (LSB) DIFFERENTIAL LINEARITY ERROR vs DIGITAL INPUT CODE 0.2 0 −0.2 −0.4 −0.4 −0.6 −0.6 −0.8 −0.8 −1.0 −1.
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DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 TYPICAL CHARACTERISTICS: VDD = +5 V (continued) At TA = +25°C, +VDD = +5 V, unless otherwise noted. Channel B LINEARITY ERROR vs DIGITAL INPUT CODE 1.0 1.0 TA = +25_C 0.8 0.6 0.6 0.4 0.4 0.2 0 −0.2 0 −0.2 −0.4 −0.6 −0.6 −0.8 −0.8 −1.0 0 1.0 8192 16384 24576 32768 40960 49152 57344 65535 Digital Input Code 0 8192 16384 24576 32768 40960 49152 57344 65535 Digital Input Code Figure 7. Figure 8.
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DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 TYPICAL CHARACTERISTICS: VDD = +5 V (continued) At TA = +25°C, +VDD = +5 V, unless otherwise noted. Channel C LINEARITY ERROR vs DIGITAL INPUT CODE 1.0 1.0 TA = +25_C 0.8 TA = +25_C 0.8 0.6 0.6 0.4 0.4 DNL (LSB) INL (LSB) DIFFERENTIAL LINEARITY ERROR vs DIGITAL INPUT CODE 0.2 0 −0.2 0.2 0 −0.2 −0.4 −0.4 −0.6 −0.6 −0.8 −0.8 −1.0 −1.
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DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 TYPICAL CHARACTERISTICS: VDD = +5 V (continued) At TA = +25°C, +VDD = +5 V, unless otherwise noted. Channel D LINEARITY ERROR vs DIGITAL INPUT CODE 1.0 1.0 TA = +25_C 0.8 TA = +25_C 0.8 0.6 0.6 0.4 0.4 DNL (LSB) INL (LSB) DIFFERENTIAL LINEARITY ERROR vs DIGITAL INPUT CODE 0.2 0 −0.2 0.2 0 −0.2 −0.4 −0.4 −0.6 −0.6 −0.8 −0.8 −1.0 −1.
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DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 TYPICAL CHARACTERISTICS: VDD = +5 V (continued) At TA = +25°C, +VDD = +5 V, unless otherwise noted. SUPPLY CURRENT vs LOGIC INPUT VOLTAGE REFERENCE MULTIPLYING BANDWIDTH 180 VDD = +5.0V 140 A ttenu ati on ( dB ) 120 0xFFFF 0x8000 0x4000 0x2000 0x1000 0x0800 0x0400 0x0200 0x0100 0x0080 0x0040 0x0020 0x0010 0x0008 0x0004 0x0002 0x0001 100 80 60 40 VDD = +2.7V 20 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.
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DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 TYPICAL CHARACTERISTICS: VDD = +2.7 V At TA = +25°C, +VDD = +2.7 V, unless otherwise noted. Channel A LINEARITY ERROR vs DIGITAL INPUT CODE 1.0 1.0 TA = +25_C 0.8 0.6 0.6 0.4 0.4 0.2 0 −0.2 0.2 0 −0.2 −0.4 −0.4 −0.6 −0.6 −0.8 −0.8 −1.0 −1.0 0 1.0 8192 16384 24576 32768 40960 49152 57344 65535 Digital Input Code 0 8192 16384 24576 32768 40960 49152 57344 65535 Digital Input Code Figure 31. Figure 32.
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DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 TYPICAL CHARACTERISTICS: VDD = +2.7 V (continued) At TA = +25°C, +VDD = +2.7 V, unless otherwise noted. Channel B LINEARITY ERROR vs DIGITAL INPUT CODE DIFFERENTIAL LINEARITY ERROR vs DIGITAL INPUT CODE 1.0 TA = +25_C 0.8 0.6 0.6 0.4 0.4 DNL (LSB) INL (LSB) 1.0 TA = +25_ C 0.8 0.2 0 −0.2 0.2 0 −0.2 −0.4 −0.4 −0.6 −0.6 −0.8 −0.8 −1.0 −1.
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DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 TYPICAL CHARACTERISTICS: VDD = +2.7 V (continued) At TA = +25°C, +VDD = +2.7 V, unless otherwise noted. Channel C LINEARITY ERROR vs DIGITAL INPUT CODE 1.0 1.0 TA = +25_C 0.8 0.6 0.6 0.4 0.4 0.2 0 −0.2 0 −0.2 −0.4 −0.6 −0.6 −0.8 −0.8 −1.0 0 1.0 0 8192 16384 24576 32768 40960 49152 57344 65535 Digital Input Code 8192 16384 24576 32768 40960 49152 57344 65535 Digital Input Code Figure 43. Figure 44.
PAGE 14
DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 TYPICAL CHARACTERISTICS: VDD = +2.7 V (continued) At TA = +25°C, +VDD = +2.7 V, unless otherwise noted. Channel D LINEARITY ERROR vs DIGITAL INPUT CODE 1.0 1.0 TA = +25_C 0.8 TA = +25_C 0.8 0.6 0.6 0.4 0.4 DNL (LSB) INL (LSB) DIFFERENTIAL LINEARITY ERROR vs DIGITAL INPUT CODE 0.2 0 −0.2 0.2 0 −0.2 −0.4 −0.4 −0.6 −0.6 −0.8 −0.8 −1.0 −1.
PAGE 15
DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 TYPICAL CHARACTERISTICS: VDD = +2.7 V (continued) At TA = +25°C, +VDD = +2.7 V, unless otherwise noted. DAC GLITCH ENDPOINT ERROR vs TEMPERATURE 3 Endpoint Error (mV) Output Voltage (50mV/div) 2 LDAC Pulse DAC C DAC B 1 0 DAC A −1 DAC D −2 −3 −40 Time (0.2µs/div) −20 Figure 55. 0 20 40 Temperature (_ C) 60 80 100 Figure 56. TIMING INFORMATION SDI A1 A0 D15 D14 D13 D12 D11 D10 D9 D1 D0 CLK Input REG.
PAGE 16
DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 THEORY OF OPERATION CIRCUIT OPERATION The DAC8814 contains four, 16-bit, current-output, digital-to-analog converters (DACs) respectively. Each DAC has its own independent multiplying reference input. The DAC8814 uses a 3-wire SPI-compatible serial data interface, with a configurable asynchronous RS pin for half-scale (MSB = 1) or zero-scale (MSB = 0) preset.
PAGE 17
DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 Figure 26 shows the gain versus frequency performance at various attenuation settings using a 3 pF external feedback capacitor connected across the IOUTX and RFBX terminals. In order to maintain good analog performance, power supply bypassing of 0.01 µF, in parallel with 1 µF, is recommended. Under these conditions, a clean power-supply with low ripple voltage capability should be used.
PAGE 18
DAC8814 www.ti.
PAGE 19
DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 To Input Register A B C D Address Decoder CS EN CLK Shift Register SDI 19th Clock SDO Figure 61. DAC8814 Equivalent Logic Interface Two additional pins RS and MSB provide hardware control over the preset function and DAC register loading. If these functions are not needed, the RS pin can be tied to logic high.
PAGE 20
DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 PCB LAYOUT The DAC8814 is a high-accuracy DAC that can have its performance compromised by grounding and printed circuit board (PCB) lead trace resistance. The 16-bit DAC8814 with a 10-V full-scale range has an LSB value of 153 µV. The ladder and associated reference and analog ground currents for a given channel can be as high as 2 mA.
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DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 APPLICATION INFORMATION The DAC8814, a 2-quadrant multiplying DAC, can be used to generate a unipolar output. The polarity of the full-scale output IOUT is the inverse of the input reference voltage at VREF. Some applications require full 4-quadrant multiplying capabilities or bipolar output swing, as shown in Figure 63. An additional external op amp A2 is added as a summing amp.
PAGE 22
DAC8814 www.ti.com SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from A Revision (September 2005) to B Revision ......................................................................................... Page • 22 Changed Equation 2 ...........................................................................................................................................................
PAGE 23
PACKAGE OPTION ADDENDUM www.ti.
PAGE 24
PACKAGE MATERIALS INFORMATION www.ti.com 30-Jan-2009 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing DAC8814IBDBR SSOP DB 28 SPQ Reel Reel Diameter Width (mm) W1 (mm) A0 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 2000 330.0 16.4 8.1 10.4 2.5 12.0 16.0 Q1 DAC8814IBDBT SSOP DB 28 250 330.0 16.4 8.1 10.4 2.5 12.0 16.0 Q1 DAC8814ICDBR SSOP DB 28 2000 330.0 16.4 8.1 10.4 2.5 12.0 16.
PAGE 25
PACKAGE MATERIALS INFORMATION www.ti.com 30-Jan-2009 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) DAC8814IBDBR SSOP DB 28 2000 346.0 346.0 33.0 DAC8814IBDBT SSOP DB 28 250 346.0 346.0 33.0 DAC8814ICDBR SSOP DB 28 2000 346.0 346.0 33.0 DAC8814ICDBT SSOP DB 28 250 346.0 346.0 33.
PAGE 26
MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN 0,38 0,22 0,65 28 0,15 M 15 0,25 0,09 8,20 7,40 5,60 5,00 Gage Plane 1 14 0,25 A 0°–ā8° 0,95 0,55 Seating Plane 2,00 MAX 0,10 0,05 MIN PINS ** 14 16 20 24 28 30 38 A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 DIM 4040065 /E 12/01 NOTES: A. B. C. D. All linear dimensions are in millimeters.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.