Datasheet

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FEATURES

APPLICATIONS

DESCRIPTION

DAC5672A

www.ti.com

................................................................................................................................................... SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009

DUAL, 14-BIT 275 MSPS DIGITAL-TO-ANALOG CONVERTER

• Package: 48-Pin Thin-Quad Flat Pack (TQFP)

• 14-Bit Dual Transmit Digital-to-Analog

Converter (DAC)

• Cellular Base Transceiver Station Transmit

• 275 MSPS Update Rate

Channel

• Single Supply: 3 V to 3.6 V

– CDMA: W-CDMA, CDMA2000, IS-95

• High Spurious-Free Dynamic Range (SFDR):

– TDMA: GSM, IS-136, EDGE/UWC-136

84 dBc at 5 MHz

• Medical/Test Instrumentation

• High Third-Order Two-Tone Intermodulation

• Arbitrary Waveform Generators (ARB)

(IMD3): 79 dBc at 15.1 MHz and 16.1 MHz

• Direct Digital Synthesis (DDS)

• WCDMA Adjacent Channel Leakage Ratio

• Cable Modem Termination System (CMTS)

(ACLR): 78 dB at Baseband

• WCDMA ACLR: 73 dB at 30.72 MHz

• Independent or Single Resistor Gain Control

• Dual or Interleaved Data

• On-Chip 1.2-V Reference

• Low Power: 330 mW

• Power-Down Mode: 9 mW

The DAC5672A is a monolithic, dual-channel, 14-bit, high-speed DAC with on-chip voltage reference.

Operating with update rates of up to 275 MSPS, the DAC5672A offers exceptional dynamic performance,

tight-gain, and offset matching characteristics that make it suitable in either I/Q baseband or direct IF

communication applications.

Each DAC has a high-impedance, differential-current output, suitable for single-ended or differential

analog-output configurations. External resistors allow scaling the full-scale output current for each DAC

separately or together, typically between 2 mA and 20 mA. An accurate on-chip voltage reference is

temperature-compensated and delivers a stable 1.2-V reference voltage. Optionally, an external reference may

be used.

The DAC5672A has two, 14-bit, parallel input ports with separate clocks and data latches. For flexibility, the

DAC5672A also supports multiplexed data for each DAC on one port when operating in the interleaved mode.

The DAC5672A has been specifically designed for a differential transformer-coupled output with a 50- Ω

doubly-terminated load. For a 20-mA full-scale output current, both a 4:1 impedance ratio (resulting in an output

power of 4 dBm) and 1:1 impedance ratio transformer ( – 2 dBm output power) are supported.

The DAC5672A is available in a 48-pin TQFP package. Pin compatibility between family members provides

12-bit (DAC5662) and 14-bit (DAC5672A) resolution. Furthermore, the DAC5672A is pin compatible to the

DAC2904 and AD9767 dual DACs. The device is characterized for operation over the industrial temperature

range of -40 ° C to 85 ° C.

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.

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 (26 pages)

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DAC5672A www.ti.com................................................................................................................................................... SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009 DUAL, 14-BIT 275 MSPS DIGITAL-TO-ANALOG CONVERTER FEATURES 1 • • • • • • • • • • • • 14-Bit Dual Transmit Digital-to-Analog Converter (DAC) 275 MSPS Update Rate Single Supply: 3 V to 3.
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DAC5672A SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009................................................................................................................................................... www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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DAC5672A www.ti.com...................................................................................................................................................
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DAC5672A SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009................................................................................................................................................... www.ti.com ABSOLUTE MAXIMUM RATINGS over TA (unless otherwise noted) (1) UNIT Supply voltage range AVDD (2) -0.5 V to 4 V DVDD (3) -0.5 V to 4 V Voltage between AGND and DGND -0.5 V to 0.5 V Voltage between AVDD and DVDD -4 V to 4 V Supply voltage range DA[13:0] and DB[13:0] (3) -0.5 V to DVDD + 0.
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DAC5672A www.ti.com................................................................................................................................................... SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009 ELECTRICAL CHARACTERISTICS (continued) over TA, AVDD = DVDD = 3.3 V, I(OUTFS) = 20 mA, independent gain set mode (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 1.25 V Reference Input V(EXTIO) Input voltage RI Input resistance CI 0.
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DAC5672A SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS AC specifications over TA, AVDD = DVDD = 3.
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DAC5672A www.ti.com................................................................................................................................................... SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009 ELECTRICAL CHARACTERISTICS (continued) AC specifications over TA, AVDD = DVDD = 3.
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DAC5672A SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS INL − Integral Nonlinearity Error − LSB INTEGRAL NONLINEARITY vs INPUT CODE 1.5 1.0 0.5 0.0 −0.5 −1.0 −1.5 0 2000 4000 6000 8000 10000 12000 14000 Input Code 16000 G001 Figure 1.
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DAC5672A www.ti.com...................................................................................................................................................
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DAC5672A SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS (continued) SINGLE-TONE SPECTRUM SINGLE-TONE SPECTRUM 0 0 fdata = 78 MSPS fOUT = 15 MHz Dual Bus Mode fdata = 165 MSPS fOUT = 30.1 MHz Dual Bus Mode −20 Power − dBm Power − dBm −20 −40 −60 −40 −60 −80 −80 −100 0.0 7.8 15.6 23.4 31.2 −100 0.0 39.0 16.
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DAC5672A www.ti.com................................................................................................................................................... SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009 TYPICAL CHARACTERISTICS (continued) TWO-TONE SPECTRUM TWO-TONE SPECTRUM fdata = 165 MSPS fdata = 78 MSPS fout1 = 20.1 MHz fout2 = 21.1 MHz Dual Bus Mode −10 −10 fout1 = 30.1 MHz fout2 = 31.1 MHz Dual Bus Mode −30 Power − dBm Power − dBm −30 −50 −70 −50 −70 −90 −90 −110 19.0 19.5 20.
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DAC5672A SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS (continued) POWER vs FREQUENCY POWER vs FREQUENCY −20 −40 Power − dBm Power − dBm −40 −20 fdata = 122.88 MSPS IF = 15.36 MHz ACLR = 77.16 dB Dual Bus Mode −60 −80 −100 −120 7.6 fdata = 122.88 MSPS IF = 30.72 MHz ACLR = 72.7 dB Dual Bus Mode −60 −80 −100 10.
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DAC5672A www.ti.com................................................................................................................................................... SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009 DVDD 100kW GSET MODE 400W Internal Digital In DGND Figure 18. CMOS/TTL Digital Equivalent Input With Internal Pullup Resistor Input Interfaces The DAC5672A features two operating modes selected by the MODE pin, as shown in Table 1.
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DAC5672A SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009................................................................................................................................................... www.ti.com DA[13:0]/DB[13:0] Valid Data tsu th t1ph WRTA/WRTB CLKA/CLKB tsettle tpd tlat IOUT or IOUT Figure 19. Dual-Bus Mode Operation Single-Bus Interleaved Data Interface and Timing In single-bus interleaved mode, the MODE pin is connected to DGND. Figure 20 shows the timing diagram.
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DAC5672A www.ti.com................................................................................................................................................... SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009 DA[13:0] Valid Data tsu th SELECTIQ WRTIQ CLKIQ RESETIQ tsettle tpd tlat IOUT or IOUT Figure 20.
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DAC5672A SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009................................................................................................................................................... www.ti.com APPLICATION INFORMATION Theory of Operation The architecture of the DAC5672A uses a current steering technique to enable fast switching and high update rate.
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DAC5672A www.ti.com................................................................................................................................................... SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009 The total differential output voltage is: V +V *V OUTDIFF OUT1 OUT2 (2 Code * 16383) V + OUTDIFF 16384 (7) I OUTFS R LOAD (8) Analog Outputs The DAC5672A provides two complementary current outputs, IOUT1 and IOUT2.
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DAC5672A SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009................................................................................................................................................... www.ti.com The single-ended configuration may be considered for applications requiring a unipolar output voltage. Connecting a resistor from either one of the outputs to ground converts the output current into a ground-referenced voltage signal.
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DAC5672A www.ti.com................................................................................................................................................... SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009 Single-Ended Configuration Figure 24 shows the single-ended output configuration, where the output current IOUT1 flows into an equivalent load resistance of 25 Ω. Node IOUT2 must be connected to AGND or terminated with a resistor of 25 Ω to AGND.
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DAC5672A SLAS528A – SEPTEMBER 2007 – REVISED MAY 2009................................................................................................................................................... www.ti.com Gain Setting Option The full-scale output current on the DAC5672A can be set two ways: either for each of the two DAC channels independently or for both channels simultaneously. For the independent gain set mode, the GSET pin (pin 42) must be low (that is, connected to AGND).
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 16-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device DAC5672AIPFBR Package Package Pins Type Drawing TQFP PFB 48 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 1000 330.0 16.4 Pack Materials-Page 1 9.6 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 9.6 1.5 12.0 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 16-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) DAC5672AIPFBR TQFP PFB 48 1000 367.0 367.0 38.
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MECHANICAL DATA MTQF019A – JANUARY 1995 – REVISED JANUARY 1998 PFB (S-PQFP-G48) PLASTIC QUAD FLATPACK 0,27 0,17 0,50 36 0,08 M 25 37 24 48 13 0,13 NOM 1 12 5,50 TYP 7,20 SQ 6,80 9,20 SQ 8,80 Gage Plane 0,25 0,05 MIN 0°– 7° 1,05 0,95 Seating Plane 0,75 0,45 0,08 1,20 MAX 4073176 / B 10/96 NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.