Datasheet

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DAC8806

FEATURES APPLICATIONS

DESCRIPTION

R2R1

DAC

ParallelBus

Input

Control

Logic

DAC

D13

RST

LDAC

REF

COM

OFS

OUT

AGND

DGND

DAC8806

SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008

www.ti.com

14-Bit, Parallel Input Multiplying Digital-to-Analog Converter

• Automatic Test Equipment

• ± 0.5 LSB DNL

• Instrumentation

• ± 1 LSB INL

• Digitally Controlled Calibration

• 14-Bit Monotonic

• Industrial Control PLCs

• Low Noise: 10 nV/ √ Hz

• Low Power: I

= 2 µ A

• Analog Power Supply: +2.7 V to +5.5 V

The DAC8806, a multiplying digital-to-analog

• 1.66 mA Full-Scale Current,

converter (DAC), is designed to operate from a single

with V

REF

= 10 V

2.7 V to 5.5 V supply.

• Settling Time: 0.5 µ s

The applied external reference input voltage V

REF

• 4-Quadrant Multiplying Reference

determines the full-scale output current. An internal

feedback resistor (R

) provides temperature tracking

• Reference Bandwidth: 8 MHz

for the full-scale output when combined with an

• Reference Input: ± 15 V

external, current-to-voltage (I/V) precision amplifier.

• Reference Dynamics: – 105 dB THD

A parallel interface offers high-speed

• SSOP-28 Package

communications. The DAC8806 is packaged in a

• Industry-Standard Pin Configuration

space-saving SSOP-28 package and has an

industry-standard pinout.

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.

2 All 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 (22 pages)

PAGE 1
DAC8806 DA C8 806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 14-Bit, Parallel Input Multiplying Digital-to-Analog Converter FEATURES APPLICATIONS • • • • • • • • • • • 1 2 • • • • • • • ±0.5 LSB DNL ±1 LSB INL 14-Bit Monotonic Low Noise: 10 nV/√Hz Low Power: IDD = 2 µA Analog Power Supply: +2.7 V to +5.5 V 1.66 mA Full-Scale Current, with VREF = 10 V Settling Time: 0.
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DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 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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DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 ELECTRICAL CHARACTERISTICS All specifications at –40°C to +85°C, VDD = +2.7 V to +5.5 V, IOUT = virtual GND, GND = 0 V, VREF = 10 V, and TA = full operating temperature, unless otherwise noted. DAC8806 PARAMETER CONDITIONS MIN TYP MAX UNITS STATIC PERFORMANCE Resolution 14 Relative accuracy Bits DAC8806 Differential nonlinearity ±0.
PAGE 4
DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 ELECTRICAL CHARACTERISTICS (continued) All specifications at –40°C to +85°C, VDD = +2.7 V to +5.5 V, IOUT = virtual GND, GND = 0 V, VREF = 10 V, and TA = full operating temperature, unless otherwise noted. DAC8806 PARAMETER CONDITIONS MIN TYP MAX UNITS POWER REQUIREMENTS VDD 2.7 IDD (normal operation) Logic inputs = 0V VDD = +4.5 V to +5.5 V VIH = VDD and VIL = GND VDD = +2.7 V to +3.6 V VIH = VDD and VIL = GND 5.
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DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 TYPICAL CHARACTERISTICS: VDD = +5V At TA = +25°C, unless otherwise noted. LINEARITY ERROR vs DIGITAL INPUT CODE 1.0 1.0 TA = +25°C VREF = 10V 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 2048 4096 6144 8192 10240 12288 14336 16383 Code 0 2048 4096 6144 8192 10240 12288 14336 16383 Code Figure 1. Figure 2.
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DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 TYPICAL CHARACTERISTICS: VDD = +5V (continued) At TA = +25°C, unless otherwise noted. REFERENCE MULTIPLYING BANDWIDTH UNIPOLAR MODE 180 6 0 -6 -12 -18 -24 -30 -36 -42 -48 -54 -60 -66 -72 -78 -84 -90 -96 -102 -108 -114 10 VDD = +5.0V 120 100 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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DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 TYPICAL CHARACTERISTICS: VDD = +5V (continued) At TA = +25°C, unless otherwise noted. FULL-SCALE ERROR vs TEMPERATURE 4.8 3.8 BIPOLAR-ZERO ERROR vs TEMPERATURE 1.5 VREF = 10V 1.0 Bipolar-Zero Error (mV) 2.8 Full-Scale Error (mV) VREF = 10V 1.8 0.8 0 -0.8 -1.8 -2.8 0.5 0 -0.5 -1.0 -3.8 -1.5 -4.8 -60 -40 -20 0 20 40 60 80 100 -60 -40 -20 0 20 40 Temperature (°C) Temperature (°C) Figure 13. Figure 14.
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DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 TYPICAL CHARACTERISTICS: VDD = +2.7V At TA = +25°C, unless otherwise noted. LINEARITY ERROR vs DIGITAL INPUT CODE 1.0 1.0 TA = +25°C VREF = 10V 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 2048 4096 6144 8192 10240 12288 14336 16383 Code 0 2048 6144 8192 10240 12288 14336 16383 Code Figure 16. LINEARITY ERROR vs DIGITAL INPUT CODE DIFFERENTIAL LINEARITY ERROR vs DIGITAL INPUT CODE 1.
PAGE 9
DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 TYPICAL CHARACTERISTICS: VDD = +2.7V (continued) At TA = +25°C, unless otherwise noted. DAC GLITCH DAC GLITCH Output Voltage (20mV) VREF = 10V Output Voltage (20mV) VREF = 10V Code: 2000h to 1FFFh LDAC Pulse Code: 1FFFh to 2000h LDAC Pulse Time (0.5ms) Time (0.5ms) Figure 21. Figure 22. FULL-SCALE ERROR vs TEMPERATURE 4.8 3.8 BIPOLAR-ZERO ERROR vs TEMPERATURE 1.5 VREF = 10V 1.0 Bipolar-Zero Error (mV) 2.
PAGE 10
DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 TYPICAL CHARACTERISTICS At TA = +25°C, unless otherwise noted. IDD vs TEMPERATURE DAC SETTLING TIME 5.0 4.5 Output Voltage (5V/div) 4.0 IDD (m A) 3.5 3.0 5.0V 2.5 2.0 1.5 Unipolar Mode Voltage Output Settling 1.0 Trigger Pulse 2.7V 0.5 0 - 40 - 20 0 20 40 60 80 Time (0.5ms/div) 100 Temperature (°C) 1.0 Figure 26. INTEGRAL NONLINEARITY vs VREF UNIPOLAR MODE INTEGRAL NONLINEARITY vs VREF BIPOLAR MODE 0.6 0.4 0.
PAGE 11
DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 TYPICAL CHARACTERISTICS (continued) At TA = +25°C, unless otherwise noted. INTEGRAL NONLINEARITY vs VDD UNIPOLAR MODE 1.0 0.4 INL (LSB) 0.4 0.2 0 -0.2 0 -0.2 -0.4 -0.6 -0.6 -0.8 -0.8 1.0 2.3 2.8 3.3 3.8 4.3 4.8 -1.0 5.3 5.5 4.3 4.8 DIFFERENTIAL NONLINEARITY vs VDD BIPOLAR MODE 1.0 DNL (LSB) 0.4 0 -0.2 0 -0.2 -0.4 -0.6 -0.6 -0.8 -0.8 2.8 3.3 3.8 4.3 4.8 -1.0 5.3 5.5 VREF = 2.5V 0.2 -0.4 2.3 5.3 5.
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DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 TYPICAL CHARACTERISTICS (continued) At TA = +25°C, unless otherwise noted. UNIPOLAR MULTIPLYING MODE THD vs FREQUENCY Total Harmonic Distortion (dB) -45 500kHz Filter 80kHz Filter 30kHz Filter Code 3FFFh VREF = 6VRMS VDD = +5V One OPA627 C1 = 20pF -55 -65 -75 -85 -95 -105 -115 10 100 1000 10k 20k 30k Frequency (Hz) Figure 37. THEORY OF OPERATION The DAC8806 is a multiplying, single-channel current output, 14-bit DAC.
PAGE 13
DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 VDD U1 VDD ROFS RFB +15V U2 VREF V+ IOUT DAC8806 VOUT OPA277 VGND -15V Figure 39. Voltage Output Configuration tWR WR DATA tDS tDH tLWD LDAC tLDAC tRST RST Figure 40. DAC8806 Timing Diagram Table 1. Function of Control Inputs CONTROL INPUTS RST WR LDAC 0 X X Asynchronous operation. The DAC register is set to zero code, resulting in the DAC output being set to 0 V.
PAGE 14
DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 APPLICATION INFORMATION Multiplying Mode THD versus Frequency Figure 35 and Figure 36 show the DAC8806 bipolar 4-quadrant multiplying mode total harmonic distortion (THD) versus frequency. Figure 35 shows the bipolar mode THD with the DAC8806 set to a full-scale code of 3FFFh. Figure 36 shows the bipolar multiplying mode THD with the DAC8806 set to a minus full-scale code of 0000h.
PAGE 15
DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 VREF U1 OPA2277 VDD RCOM R1 DAC8806 R1 REF R2 ROFS RFB ROFS RFB D0 ¼ D13 DAC Parallel Bus Input Register C1 IOUT DAC Register U2 OPA2277 VOUT AGND WR RST LDAC Control Logic DGND Figure 42. Bipolar Output Circuit Programmable Current Source Circuit A DAC8806 can be integrated into the circuit in Figure 43 to implement an improved Howland current pump for precise V/I conversions.
PAGE 16
DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 R2¢ 15kW C1 10pF VDD R1¢ 150kW U3 R3¢ 50kW U1 U2 VREF VREF VOUT OPA277 VDD ROFS RFB DAC8806 IOUT R1 150kW R2 15kW R3 50W IL OPA277 LOAD GND Figure 43. Programmable Bidirectional Current Source Circuit Cross-Reference The DAC8806 has an industry-standard pinout. Table 2 provides the cross-reference information. Table 2.
PAGE 17
DAC8806 www.ti.com SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision A (June 2006) to Revision B .................................................................................................... Page • • • • • Changed front page block diagram......................................................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
PAGE 19
PACKAGE MATERIALS INFORMATION www.ti.com 30-Jan-2009 TAPE AND REEL INFORMATION *All dimensions are nominal Device DAC8806IDBR Package Package Pins Type Drawing SSOP DB 28 SPQ Reel Reel Diameter Width (mm) W1 (mm) 2000 330.0 16.4 Pack Materials-Page 1 A0 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 8.1 10.4 2.5 12.0 16.
PAGE 20
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) DAC8806IDBR SSOP DB 28 2000 346.0 346.0 33.
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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.