DAC5670-SP_15 Datasheet, PDF (1/34 Pages) Texas Instruments – DAC5670-SP 14-Bit 2.4-GSPS Digital-to-Analog Converter (DAC)

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DAC5670-SP
SGLS386F – JANUARY 2009 – REVISED OCTOBER 2014
DAC5670-SP 14-Bit 2.4-GSPS Digital-to-Analog Converter (DAC)
1 Features
•1 14-Bit Resolution
• 2.4-GSPS Max Update Rate DAC
• Dual Differential Input Ports
– Even/Odd Demultiplexed Data
– Maximum 1.2 GSPS Each Port, 2.4 GSPS
Total
– Dual 14-Bit Inputs + 1 Reference Bit
– DDR Output Clock
– DLL Optimized Clock Timing Synchronized to
Reference Bit
– LVDS and HyperTransport™ Voltage Level
Compatible
– Internal 100-Ω Terminations for Data and
Reference Bit Inputs
• Selectable 2× Interpolation With Fs / 2 Mixing
• Differential Scalable Current Outputs: 5 to 30 mA
• On-Chip 1.2-V Reference
• 3.3-V Analog Supply Operation
• Power Dissipation: 2 W
• 192-Ball CBGA (GEM) Package
• QML-V Qualified, SMD 5962-07247
• Military Temperature Range (–55°C to 125°C
T_case)
3 Description
The DAC5670 is a 14-bit 2.4-GSPS DAC with dual
demultiplexed differential input ports. The DAC5670
is clocked at the DAC sample rate and the two input
ports run at a maximum of 1.2 GSPS. An additional
reference bit input sequence is used to adjust the
output clock delay to the data source, optimizing the
internal data latching clock relative to this reference
bit with a delay lock loop (DLL). Alternatively, the DLL
may be bypassed and the timing interface managed
by controlling DATA setup and hold timing to
DLYCLK.
The DAC5670 can also accept data up to 1.2 GSPS
using only the A input port. In the single port modes,
options include: repeating the input sample (A_ONLY
mode), 2× interpolation by zero stuff (A_ONLY_ZS
mode), or 2× interpolation by repeating and inverting
the input sample (A_ONLY_INV). These modes are
used to double the input sample rate up to 2.4 GSPS.
The DAC5670 operates with a single 3- to 3.6-V
supply voltage. Power dissipation is 2 W at maximum
operating conditions. The DAC5670 provides a
nominal full-scale differential current-output of 20 mA,
supporting both single-ended and differential
applications. An on-chip 1.2-V temperature-
compensated bandgap reference and control
amplifier allows the user to adjust the full-scale output
current from the nominal 20 mA to as low as 5 mA or
as high as 30 mA.
2 Applications
• Test and Measurement: Arbitrary Waveform
Generator
• Communications
• Engineering evaluation (/EM) samples are
available
(1) _{These units are intended for engineering evaluation only.}
They are processed to a non-compliant flow (that is, no burn-
in, and so forth) and are tested to a temperature rating of
25°C only. These units are not suitable for qualification,
production, radiation testing, or flight use. Parts are not
warranted for performance over the full MIL specified
temperature range of –55°C to 125°C or operating life.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DAC5670-SP
CBGA (192)
19.00 mm × 19.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
SLEEP
DA_P[13:0]
DA_N[13:0]
DB_P[13:0]
DB_N[13:0]
DTCLK_P
DTCLK_N
LOCK
RESTART
INV_CLK
DLYCLK_P
DLYCLK_N
Phase
Detector
Loop
Filter
Variable
Delay
Mode Controls
Input
Registers
Demux
and
Format
14 bit
2.4Gsps
DAC
÷2
÷2
Bandgap
Ref
CSBIAS
CSBIAS_IN
IOUT_P
IOUT_N
RBIASOUT
RBIASIN
REFIO_IN
REFIO
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.