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DAC1405D650 Datasheet, PDF (1/41 Pages) NXP Semiconductors – Dual 14-bit DAC, up to 650 Msps; 2´ 4´ and 8´ interpolating | |||
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DAC1405D650
Dual 14-bit DAC, up to 650 Msps; 2ï´, 4ï´ and 8ï´ interpolating
Rev. 05 â 2 July 2012
Product data sheet
1. General description
The DAC1405D650 is a high-speed 14-bit dual channel Digital-to-Analog Converter
(DAC) with selectable 2ï´, 4ï´ or 8ï´ interpolating filters optimized for multi-carrier wireless
transmitters.
Thanks to its digital on-chip modulation, the DAC1405D650 allows the complex I and Q
inputs to be converted up from baseband 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.
The DAC1405D650 also includes a 2ï´, 4ï´ and 8ï´ clock multiplier which provides the
appropriate internal clocks and an internal regulator to adjust the output full-scale current.
2. Features and benefits
ï® Dual 14-bit resolution
ï® 650 Msps maximum update rate
ï® IMD3: 80 dBc; fs = 640 Msps; fo = 96 MHz
ï® ACPR: 71 dBc; 2 carriers WCDMA;
fs = 614.4 Msps; fo = 96 MHz; PLL on
ï® Selectable 2ï´, 4ï´ or 8ï´ interpolation ï® Typical 0.95 W power dissipation at 4ï´
filters
interpolation
ï® Input data rate up to 160 Msps
ï® Power-down and Sleep modes
ï® Very low noise cap-free integrated PLL ï® Differential scalable output current from
1.6 mA to 22 mA
ï® 32-bit programmable NCO frequency ï® On-chip 1.29 V reference
ï® Dual port or Interleaved data modes ï® External analog offset control
(10-bit auxiliary DACs)
ï® 1.8 V and 3.3 V power supplies
ï® Internal digital offset control
ï® LVDS compatible clock
ï® Inverse (sin x) / x function
ï® Twoâs complement or binary offset ï® Fully compatible SPI port
data format
ï® 3.3 V CMOS input buffers
ï® Industrial temperature range from
ï40 ï°C to +85 ï°C
®
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