參數(shù)資料
型號(hào)： DAC1405D750HW
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： DAC
英文描述： Dual 14-bit DAC, up to 750 Msps; 4× and 8× interpolating
中文描述： SERIAL, PARALLEL, WORD INPUT LOADING, 0.02 us SETTLING TIME, 14-BIT DAC, PQFP100
封裝： 14 X 14 MM, 1 MM HEIGHT, PLASTIC, MS-026, SOT638-1, HTQFP-100
文件頁(yè)數(shù)： 27/42頁(yè)
文件大小： 352K
代理商： DAC1405D750HW
DAC1405D750
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 4 — 7 June 2011
27 of 42
NXP Semiconductors
DAC1405D750
Dual 14-bit DAC, up to 750 Msps; 4
and 8
interpolating
10.7.1
NCO in 32-bit
When using the NCO, the frequency can be set by the four registers FREQNCO_LSB,
FREQNCO_LISB, FREQNCO_UISB and FREQNCO_MSB over 32 bits.
The frequency for the NCO in 32-bit is calculated as follows:
(1)
where M is the decimal representation of FREQ_NCO[31:0].
The phase of the NCO can be set from 0
to 360
by both registers PHINCO_LSB and
PHINCO_MSB over 16 bits.
10.7.2
Low-power NCO
When using the low-power NCO, the frequency can be set by the 5 MSB of register
FREQNCO_MSB.
The frequency for the low-power NCO is calculated as follows:
(2)
where M is the decimal representation of FREQ_NCO[31:27].
The phase of the low-power NCO can be set by the 5 MSB of the register PHINCO_MSB.
10.7.3
Minus_3dB function
During normal use, a full-scale pattern will also be full scale at the output of the DAC.
Nevertheless, when the I and Q data are simultaneously close to full scale, some clipping
can occur and the Minus_3dB function can be used to reduce the gain by 3 dB in the
modulator. This is to keep a full-scale range at the output of the DAC without added
interferers.
10.8 x / (sin x)
Due to the roll-off effect of the DAC, a selectable FIR filter is inserted to compensate for
the x / (sin x) effect. This filter introduces a DC loss of 3.4 dB. The coefficients are
represented in
Table 37
.
Table 37.
First interpolation filter
Lower
H(1)
H(2)
H(3)
H(4)
H(5)
f
NCO
M
--------------
f
s
2
32
=
f
NCO
M
--------------
f
s
2
=
Inversion filter coefficients
Upper
H(9)
H(8)
H(7)
H(6)
-
Value
2
4
10
35
401
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DAC1405D750HW/C1, 551 制造商:NXP Semiconductors 功能描述:0
DAC1405D750HW/C1,5 功能描述:數(shù)模轉(zhuǎn)換器- DAC 2CONV 14bit 3.3V RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類(lèi)型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC1405D750HW/C1,551 功能描述:數(shù)模轉(zhuǎn)換器- DAC Dual 14BtDAC 750Msps 4xand 8xnterpolating RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類(lèi)型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC1405D750HW/C1’5 功能描述:數(shù)模轉(zhuǎn)換器- DAC DL 14BIT DAC 750MSPS 4X AND 8X INT RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類(lèi)型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC1405D750HW-C1 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類(lèi)型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
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