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| 型號： | DAC1627D1G25 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | DAC |
| 中文描述： | PARALLEL, WORD INPUT LOADING, 0.02 us SETTLING TIME, 16-BIT DAC, PQCC72 |
| 封裝： | 10 X 10 MM, 0.85 MM HEIGHT, PLASTIC, SOT813-3, HVQFN-72 |
| 文件頁數(shù)： | 28/69頁 |
| 文件大?。?/td> | 1677K |
| 代理商： | DAC1627D1G25 |
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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
28 of 69
NXP Semiconductors
DAC1627D1G25
Dual 16-bit DAC: up to 1.25 Gsps; x2, x4 and x8 interpolating
It is possible to define if the DAC1627D1G25 operates with a binary input or a
two's complement input (bit CODING; see
Table 24
).
Table 18
shows the output current as a function of the input data, when
I
OA(fs)
= I
OB(fs)
= 20 mA.
Table 18.
Data
10.12 Full-scale current
10.12.1
Regulation
The DAC1627D1G25 reference circuitry integrates an internal band gap reference voltage
which delivers a 1.25 V reference on the GAPOUT pin. It is recommended to decouple pin
GAPOUT using a 100 nF capacitor.
The reference current is generated via an external resistor of 910
Ω
(1 %) connected to
VIRES and a control amplifier sets the appropriate full-scale current (I
OA(fs)
and I
OB(fs)
) for
both DACs (see
Figure 20
)).
Figure 20
shows the optimal configuration for temperature drift compensation because the
band gap reference voltage can be matched to the voltage across the feedback resistor.
The DAC current can also be adjusted by applying an external reference voltage to the
non-inverting input pin GAPOUT and by disabling the internal band gap reference voltage
(bit GAP_PON
of the COMMON register; see
Table 24
).
10.12.2
Full-scale current adjustment
The default full-scale current (I
O(fs)
) is 20 mA but further adjustments can be made by the
user to both DACs independently via the serial interface from 6.95 mA to 28.7 mA,
±
11 %.
DAC transfer function
I15 to I0/Q15 to Q0
(binary coding)
I15 to I0/Q15 to Q0
(two’s complement
coding
1000 0000 0000 0000
...
0000 0000 0000 0000
...
0111 11111111 1111
IOUTAP/IOUTBP
IOUTAN/IOUTBN
0
...
32768
...
65535
0000 0000 0000 0000
...
1000 0000 0000 0000
...
1111 1111 1111 1111
0 mA
...
10 mA
...
20 mA
20 mA
....
10 mA
...
0 mA
Fig 20. Internal reference configuration
001aan834
910 Ω (1 %)
100 nF
DAC
CURRENT
SOURCES
ARRAY
BAND GAP
REFERENCE
GAPOUT
AGND
AGND
VIRES
DAC1627D
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DAC1627D1G25/DB,598 | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 DAC DEMOBOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| 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(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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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