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參數資料
| 型號： | MAX5858 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Quadruple 2-Input Exclusive-OR Gates 14-CDIP -55 to 125 |
| 中文描述： | 雙路、10位、300Msps、電流輸出DAC，帶有4倍/2倍/1倍插值濾波器 |
| 文件頁數： | 14/23頁 |
| 文件大?。?/td> | 809K |
| 代理商： | MAX5858 |
M
Dual, 10-Bit, 300Msps, Current-Output DAC with
4x/2x/1x Interpolation Filters
14
______________________________________________________________________________________
Device Power-Up and
States of Operation
At power-up, the MAX5858
’
s default configuration is
no-interpolation mode with a gain of 0dB and a fully
operational converter. In shutdown, the MAX5858 con-
sumes only 1μA of supply current, and in standby the
current consumption is 4.4mA. Wake-up time from
standby mode to normal operation is 0.7μs.
Interpolation Filters
The MAX5858 features a two stage, 2x digital interpo-
lating filter based on 43-tap and 23-tap FIR topology.
F1EN and F2EN enable the interpolation filters. F1EN
high enables the first filter for 2x interpolation and F2EN
high enables the second filter for combined 4x interpo-
lation. To bypass and disable both interpolation filters
(no-interpolation mode or 1x mode) set F1EN = F2EN =
0. When set for 1x mode the filters are powered down
and consume virtually no current. An illegal condition is
defined by: F1EN = 0, F2EN = 1 (see Table 2 for con-
figuration modes).
The programmable interpolation filters multiply the
MAX5858 input data rate by a factor of 2x or 4x to sep-
arate the reconstructed waveform spectrum and the
first image. The original spectral images, appearing
around multiples of the DAC input data rate, are attenu-
ated at least 60dB by the internal digital filters. This fea-
ture provides three benefits:
1)
Image separation reduces complexity of analog
reconstruction filters.
2)
Lower input data rates eliminate board level high-
speed data transmission.
3)
Sin(x)/x roll-off is reduced over the effective band-
width.
Figure 2 shows an application circuit and Figure 3 illus-
trates a practical example of the benefits when using
the MAX5858 in 4x-interpolation mode. The example
illustrates signal synthesis of a 20MHz IF with a
±10MHz bandwidth. The designer can consider three
options to address the design challenge. The tradeoffs
for each solution are depicted in Table 4.
CONTROL WORD
PD
DACEN
FUNCTION
Power-Down. The part enters power-down mode if PD = 1.
DAC Enable. When DACEN = 0 and PD = 0, the part enters standby mode.
F2EN
Filter Enable. When F2EN = 1 and F1EN = 1, 4x interpolation is enabled. When F2EN = 0, the interpolation
mode is determined by F1EN.
F1EN
Filter Enable. When F1EN = 1 and F2EN = 0, 2x interpolation is active. With F1EN = 0 and F2EN = 0, the
interpolation is disabled.
G3
G2
G1
G0
Bit 3 (MSB) of Gain Adjust Word.
Bit 2 of Gain Adjust Word.
Bit 1 of Gain Adjust Word.
Bit 0 (LSB) of Gain Adjust Word.
Table 1. Control Word Format and Function
MODE
PD
0
0
0
0
1
0
DACEN
1
1
1
0
X
1
F2EN
0
0
1
X
X
X
F1EN
0
1
1
X
X
X
No interpolation
2x interpolation
4x interpolation
Standby
Power-down
Power-up
X = Don
’
t care.
F1EN = 0, F2EN = 1 illegal.
Table 2. Configuration Modes
GAIN ADJUSTMENT ON
CHANNEL A (dB)
G3
G2
G1
G0
+0.4
0
-0.35
0
1
1
0
0
1
0
0
1
0
0
1
Table 3. Gain Difference Setting
MSB
PD
LSB
X
DACEN
F2EN
F1EN
G3
G2
G1
G0
X
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX5858AECM | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX5858AECM+D | 功能描述:數模轉換器- DAC 10-Bit 2Ch 300Msps DAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量: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 |
| MAX5858AECM+TD | 功能描述:數模轉換器- DAC 10-Bit 2Ch 300Msps DAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量: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 |
| MAX5858AECM-D | 功能描述:數模轉換器- DAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量: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 |
| MAX5858AECM-TD | 功能描述:數模轉換器- DAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量: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 |
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