®
1. General description
The DAC1405D750 is a high-speed 14-bit dual channel Digital-to-Analog Converter
(DAC) with selectable 4 or 8 interpolating filters optimized for multi-carrier wireless
transmitters.
Thanks to its digital on-chip modulation, the DAC1405D750 allows the complex I and Q
inputs to be converted from BaseBand (BB) to IF. The mixing frequency is adjusted via a
Serial Peripheral Interface (SPI) with a 32-bit Numerically Controlled Oscillator (NCO) and
the phase is controlled by a 16-bit register.
Two modes of operation are available: separate data ports or a single interleaved
high-speed data port. In the Interleaved mode, the input data stream is demultiplexed into
its original I and Q data and then latched.
A 4 and 8 clock multiplier enables the DAC1405D750 to provide the appropriate
internal clocks from the internal PLL. The internal PLL can be bypassed enabling the use
of an external high frequency clock. The voltage regulator enables adjustment of the
output full-scale current.
2. Features and benefits
DAC1405D750
Dual 14-bit DAC, up to 750 Msps; 4x and 8x interpolating
Rev. 06 — 2 July 2012 Product data sheet
Dual 14-bit resolution IMD3: 74 dBc; f
s
= 737.28 Msps;
f
o
= 140 MHz
750 Msps maximum update rate ACPR: 72 dBc; 2-carrier WCDMA;
f
s
= 737.28 Msps; f
o
=153.6MHz
Selectable 4 or 8 interpolation filters Typical 1.2 W power dissipation at 4
interpolation, PLL off and 740 Msps
Input data rate up to 185 Msps Power-down and Sleep modes
Very low noise cap-free integrated PLL Differential scalable output current from
1.6 mA to 22 mA
32-bit programmable NCO frequency On-chip 1.29 V reference
Dual port or Interleaved data modes External analog offset control
(10-bit auxiliary DACs)
1.8 V and 3.3 V power supplies Internal digital offset control
LVDS compatible clock Inverse x / (sin x) function
Two’s complement or binary offset
data format
Fully compatible SPI port
1.8 V/3.3 V CMOS input data buffers Industrial temperature range from
40 C to +85 C
DAC1405D750 6 © IDT 2012. All rights reserved.
Product data sheet Rev. 06 — 2 July 2012 2 of 41
Integrated Device Technology
DAC1405D750
Dual 14-bit DAC, up to 750 Msps; 4 and 8 interpolating
3. Applications
Wireless infrastructure: LTE, WiMAX, GSM, CDMA, WCDMA, TD-SCDMA
Communication: LMDS/MMDS, point-to-point
Direct Digital Synthesis (DDS)
Broadband wireless systems
Digital radio links
Instrumentation
Automated Test Equipment (ATE)
4. Ordering information
Table 1. Ordering information
Type number Package
Name Description Version
DAC1405D750HW HTQFP100 plastic thermal enhanced thin quad flat package; 100 leads;
body 14 14 1 mm; exposed die pad
SOT638-1
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
DAC1405D750 6 © IDT 2012. All rights reserved.
Product data sheet Rev. 06 — 2 July 2012 3 of 41
Integrated Device Technology
DAC1405D750
Dual 14-bit DAC, up to 750 Msps; 4 and 8 interpolating
5. Block diagram
Fig 1. Block diagram
001aal377
DAC1405D750
FIR1
2 ×
2 ×
FIR1
FIR2
2 ×
2 ×
FIR2
FIR3
2 ×
2 ×
FIR3
NCO
cos sin
62
66
63 65 64
CLOCK GENERATOR/PLL
COMPLEX MODULATOR
LATCH
Q
LATCH
I
CLKP
RESET_N
12
SYNCP
DAC A
AUXILIARY
DAC
AUXILIARY
DAC
DAC B
REFERENCE
BANDGAP
OFFSET
CONTROL
10-BIT
GAIN
CONTROL
10-BIT
OFFSET
CONTROL
10-BIT
GAIN
CONTROL
10-BIT
OFFSET
CONTROL
13
SYNCN
SCLK
SCS_N
SDIO
SDO
CLKN
Q0 to Q13
dual port/
interleaved
data modes
I0 to I13
8
9
41, 42,
45 to 48,
51 to 58
18 to 25,
28 to 31, 34, 35
SPI
AUXAN
GAPOUT
AUXAP
IOUTAN
VIRES
IOUTAP
IOUTBN
IOUTBP
AUXBN
AUXBP
3
69
2
91
68
90
85
86
73
74
mixer
+
++
+
A
B
+
mixer
mixer
mixer
x
sin x
x
sin x
14
14

DAC1405D750HW-C1

Mfr. #:
Manufacturer:
Description:
IC DAC 14BIT DL 750MSPS 100HTQFP
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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