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| 型號： | DAC1627D1G25HN |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 外設及接口 |
| 英文描述： | Dual 16-bit DAC, up to 1.25 Gsps; 2x 4x and 8x interpolating |
| 封裝： | DAC1627D1G25HN/C1<SOT813-3 (HVQFN72)|<<http://www.nxp.com/packages/SOT813-3.html<1<Always Pb-free,; |
| 文件頁數(shù)： | 27/69頁 |
| 文件大?。?/td> | 1677K |
| 代理商： | DAC1627D1G25HN |
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DAC1627D1G25
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Objective data sheet
Rev. 1 — 29 April 2011
27 of 69
NXP Semiconductors
DAC1627D1G25
Dual 16-bit DAC: up to 1.25 Gsps; x2, x4 and x8 interpolating
10.9.4
Minus 3dB
In normal use, a full-scale pattern is also full-scale at the DAC output. Nevertheless, when
the I data and Q data come close to full-scale simultaneously, some clipping can occur.
The Minus 3dB function (bit MINUS_3DB of register DAC_OUT_CTRL; see
Table 38
) can
be used to reduce the 3 dB gain in the modulator. It retains a full-scale range at the DAC
output without added interferers.
10.10 Inverse sinx / x
A selectable FIR filter is incorporated to compensate the sinx / x effect caused by the
roll-off effect of the DAC. This filter introduces a loss of 3.4 dB at DC. The coefficients are
represented in
Table 17
.
Table 17.
10.11 DAC transfer function
The full-scale output current for each DAC is the sum of the two complementary current
outputs:
The output current of DAC A depends on the digital input data and the gain factor defined
by bits DAC_A_DGAIN[7:0] of register DAC_A_DGAIN_LSB (see
Table 34
) and bits
DAC_A_DGAIN[11:8] of register DAC_A_DGAIN_MSB (see
Table 35
).
(3)
(4)
The output current of DAC B depends on the digital input data and the gain factor defined
by bits DAC_B_DGAIN[7:0] of register DAC_B_DGAIN_LSB (see
Table 36
) and bits
DAC_B_DGAIN[11:8] of register DAC_B_DGAIN_MSB (see
Table 37
).
(5)
(6)
Inversion filter coefficients
First interpolation filter
Upper
H(9)
H(8)
H(7)
H(6)
-
Lower
H(1)
H(2)
H(3)
H(4)
H(5)
Value
+1
4
+13
51
+610
I
OA fs
I
IOUTAP
I
IOUTAN
+
=
I
OB fs
)
)
I
IOUTBP
I
IOUTBN
+
=
I
IOUTAP
I
OA fs
1024
-----------------------------------------
)
65535
(
)
(
)
------------------------
×
×
=
I
IOUTAN
I
OA fs
1
1024
-----------------------------------------
)
65535
(
)
(
)
------------------------
×
–
×
=
I
IOUTBP
I
OB fs
1024
-----------------------------------------
)
65535
(
)
(
)
------------------------
×
×
=
I
IOUTBN
I
OB fs
1
1024
-----------------------------------------
)
65535
(
)
(
)
------------------------
×
–
×
=
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DAC1627D1G25HN/C1, | 功能描述:調(diào)節(jié)器/解調(diào)器 DUAL 16b 1.25GSPS to 1.25 Gsps RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| DAC1627D1G25HN/C1,551 | 功能描述:調(diào)節(jié)器/解調(diào)器 Dual 16-bit DAC, up to 1.25 Gsps RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| DAC1627D1G25HN-C1 | 功能描述:數(shù)模轉換器- DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| DAC1627D1G25HN-C18 | 制造商:Integrated Device Technology Inc 功能描述:HVQFN72 - Tape and Reel |
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