Datasheet

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FEATURES APPLICATIONS

MUX

DA[11:0]

DB[11:0]

MODE

GSET

Latch A

Latch B

12−b DAC

IOUTA1

IOUTA2

IOUTB1

IOUTB2

1.2 V Reference

WRTB WRTA CLKB CLKA

BIASJ_A

BIASJ_B

EXTIO

DVDD DGND AVDD AGND

SLEEP

DESCRIPTION

DAC5662

www.ti.com

................................................................................................................................................................ SLAS425B – JULY 2004 – REVISED MAY 2007

DUAL, 12-BIT 275 MSPS DIGITAL-TO-ANALOG CONVERTER

• Cellular Base Transceiver Station Transmit

• 12-Bit Dual Transmit DAC

Channel

• 275 MSPS Update Rate

– CDMA: W-CDMA, CDMA2000, IS-95

• Single Supply: 3 V to 3.6 V

– TDMA: GSM, IS-136, EDGE/UWC-136

• High SFDR: 85 dBc at 5 MHz

• Medical/Test Instrumentation

• High IMD3: 78 dBc at 15.1 and 16.1 MHz

• Arbitrary Waveform Generators (ARB)

• WCDMA ACLR: 70 dB at 30.72 MHz

• Direct Digital Synthesis (DDS)

• Independent or Single Resistor Gain Control

• Cable Modem Termination System (CMTS)

• Dual or Interleaved Data

• On-Chip 1.2-V Reference

• Low Power: 330 mW

• Power-Down Mode: 15 mW

• Package: 48-Pin TQFP

Figure 1.

The DAC5662 is a monolithic, dual-channel 12-bit high-speed digital-to-analog converter (DAC) with on-chip

voltage reference.

Operating with update rates of up to 275 MSPS, the DAC5662 offers exceptional dynamic performance and

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 DAC5662 has two 12-bit parallel input ports with separate clocks and data latches. For flexibility, the

DAC5662 also supports multiplexed data for each DAC on one port when operating in the interleaved mode.

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 (25 pages)

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DAC5662 www.ti.com ................................................................................................................................................................ SLAS425B – JULY 2004 – REVISED MAY 2007 DUAL, 12-BIT 275 MSPS DIGITAL-TO-ANALOG CONVERTER FEATURES APPLICATIONS • • • • • • • • • • • • • 1 2 12-Bit Dual Transmit DAC 275 MSPS Update Rate Single Supply: 3 V to 3.6 V High SFDR: 85 dBc at 5 MHz High IMD3: 78 dBc at 15.1 and 16.1 MHz WCDMA ACLR: 70 dB at 30.
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DAC5662 SLAS425B – JULY 2004 – REVISED MAY 2007 ................................................................................................................................................................ www.ti.com The DAC5662 has been specifically designed for a differential transformer coupled output with a 50-Ω doubly terminated load.
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DAC5662 www.ti.com ................................................................................................................................................................ SLAS425B – JULY 2004 – REVISED MAY 2007 TERMINAL FUNCTIONS (continued) TERMINAL I/O DESCRIPTION NAME NO. DGND 15, 21 I Digital ground DVDD 16, 22 I Digital supply voltage EXTIO 43 I/O GSET 42 I Gain-setting mode: H - 1 resistor, L - 2 resistors. Internal pullup. IOUTA1 46 O DACA current output.
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DAC5662 SLAS425B – JULY 2004 – REVISED MAY 2007 ................................................................................................................................................................ www.ti.com ELECTRICAL CHARACTERISTICS over operating free-air temperature range, AVDD = DVDD = 3.
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DAC5662 www.ti.com ................................................................................................................................................................ SLAS425B – JULY 2004 – REVISED MAY 2007 ELECTRICAL CHARACTERISTICS over operating free-air temperature range, AVDD = DVDD = 3.3 V, IOUTFS = 20 mA, fDATA = 200 MSPS, fOUT = 1 MHz, independent gain set mode (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Power Supply AVDD Analog supply voltage 3 3.3 3.
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DAC5662 SLAS425B – JULY 2004 – REVISED MAY 2007 ................................................................................................................................................................ www.ti.com ELECTRICAL CHARACTERISTICS AC specifications over operating free-air temperature range, AVDD = DVDD = 3.
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DAC5662 www.ti.com ................................................................................................................................................................ SLAS425B – JULY 2004 – REVISED MAY 2007 ELECTRICAL CHARACTERISTICS Digital specifications over operating free-air temperature range, AVDD = DVDD = 3.3 V, IOUTFS = 20 mA (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Digital Input VIH High-level input voltage 2 3.
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DAC5662 SLAS425B – JULY 2004 – REVISED MAY 2007 ................................................................................................................................................................ www.ti.com TYPICAL CHARACTERISTICS INL - Integral Nonlinearity Error - LSB INTEGRAL NONLINEARITY vs INPUT CODE 0.4 0.3 0.2 0.1 -0.0 -0.1 -0.2 -0.3 -0.4 0 512 1024 1536 2048 2560 3072 3584 Input Code 4096 G001 Figure 2.
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DAC5662 www.ti.com ................................................................................................................................................................
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DAC5662 SLAS425B – JULY 2004 – REVISED MAY 2007 ................................................................................................................................................................ www.ti.com TYPICAL CHARACTERISTICS (continued) SINGLE-TONE SPECTRUM SINGLE-TONE SPECTRUM 0 0 fdata = 165 MSPS fOUT = 30.1 MHz Dual Bus Mode fdata = 78 MSPS fOUT = 15 MHz Dual Bus Mode −20 Power − dBm Power - dBm -20 -40 -60 -80 −40 −60 −80 -100 0.0 7.8 15.6 23.4 31.2 −100 0.0 39.
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DAC5662 www.ti.com ................................................................................................................................................................ SLAS425B – JULY 2004 – REVISED MAY 2007 TYPICAL CHARACTERISTICS (continued) TWO-TONE SPECTRUM TWO-TONE SPECTRUM 0 0 fdata = 78 MSPS fOUT = 20.1 MHz and 21.1 MHz Dual Bus Mode −20 Power − dBm Power − dBm −20 −40 −60 −80 fdata = 165 MSPS fOUT = 30.1 MHz and 31.1 Mhz Dual Bus Mode −40 −60 −80 −100 19.0 19.5 20.
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DAC5662 SLAS425B – JULY 2004 – REVISED MAY 2007 ................................................................................................................................................................ www.ti.com Digital Inputs and Timing Digital Inputs The data input ports of the DAC5662 accept a standard positive coding with data bit D11 being the most significant bit (MSB). The converter outputs support a clock rate of up to 275 MSPS.
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DAC5662 www.ti.com ................................................................................................................................................................ SLAS425B – JULY 2004 – REVISED MAY 2007 Table 1.
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DAC5662 SLAS425B – JULY 2004 – REVISED MAY 2007 ................................................................................................................................................................ www.ti.com Correct pairing of the I- and Q-channel data is done by RESETIQ. In interleaved mode, the clock input CLKIQ is divided by two, which would translate to a non-deterministic relation between the rising edges of the CLKIQ and CLKDACIQ.
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DAC5662 www.ti.com ................................................................................................................................................................ SLAS425B – JULY 2004 – REVISED MAY 2007 APPLICATION INFORMATION Theory of Operation The architecture of the DAC5662 uses a current steering technique to enable fast switching and high update rate.
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DAC5662 SLAS425B – JULY 2004 – REVISED MAY 2007 ................................................................................................................................................................ www.ti.com The total differential output voltage is: V +V *V OUTDIFF OUT1 OUT2 (2 Code * 4095) V + I OUTDIFF OUTFS 4096 (7) R LOAD (8) Analog Outputs AVDD S(1) IOUT1 RLOAD S(1)C IOUT2 S(2) S(2)C S(N) S(N)C Current Source Array RLOAD Figure 20.
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DAC5662 www.ti.com ................................................................................................................................................................ SLAS425B – JULY 2004 – REVISED MAY 2007 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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DAC5662 SLAS425B – JULY 2004 – REVISED MAY 2007 ................................................................................................................................................................ www.ti.com Single-Ended Configuration Figure 23 shows the single-ended output configuration, where the output current IOUT1 flows into an equivalent load resistance of 25 Ω. Node IOUT2 should be connected to AGND or terminated with a resistor of 25 Ω to AGND.
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DAC5662 www.ti.com ................................................................................................................................................................ SLAS425B – JULY 2004 – REVISED MAY 2007 Gain Setting Option The full-scale output current on the DAC5662 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 (i.e. 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 DAC5662IPFBR 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) DAC5662IPFBR 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.