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參數(shù)資料
| 型號(hào)： | MAX5856AECM+TD |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 6/23頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 8BIT DUAL 300MSPS 48-TQFP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,000 |
| 設(shè)置時(shí)間： | 11ns |
| 位數(shù)： | 8 |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 2 |
| 電壓電源： | 單電源 |
| 功率耗散（最大）： | 792mW |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-TQFP 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 48-TQFP 裸露焊盤（7x7） |
| 包裝： | 帶卷 (TR) |
| 輸出數(shù)目和類型： | 2 電流，單極 |
| 采樣率（每秒）： | 300M |
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MAX5856A
Dual 8-Bit, 300Msps DAC with 4x/2x/1x
Interpolation Filters and PLL
14
______________________________________________________________________________________
Device Power-Up and
States of Operation
At power-up, the MAX5856A is configured in no-inter-
polation mode with a gain adjustment setting of 0dB
and a fully operational converter. In shutdown, the
MAX5856A consumes only 1A of supply current, and
in standby the current consumption is 4.4mA. Wake-up
time from standby mode to normal operation is 0.7s.
Interpolation Filters
The MAX5856A features a 2-stage, 2x digital interpolating
filter based on 43-tap and 23-tap FIR topology. F1EN and
F2EN enable the interpolation filters. F1EN = 1 enables
the first filter for 2x interpolation and F2EN = 1 enables
the second filter for combined 4x interpolation. 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 configuration modes).
The programmable interpolation filters multiply the
MAX5856A input data rate by a factor of two or four to
separate 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 rolloff is reduced over the effective bandwidth.
Figure 2 shows an application circuit and Figure 3 illus-
trates a practical example of the benefits when using
the MAX5856A with 4x-interpolation mode. The exam-
ple illustrates signal synthesis of a 20MHz IF with a
±10MHz bandwidth. Three options can be considered
to address the design requirements. The tradeoffs for
each solution are shown in Table 4.
MSB
LSB
PD
DACEN
F2EN
F1EN
G3
G2
G1
G0
CONTROL WORD
FUNCTION
PD
Power-down; The part enters power-down mode if PD = 1.
DACEN
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
Bit 3 (MSB) of gain adjust word.
G2
Bit 2 of gain adjust word.
G1
Bit 1 of gain adjust word.
G0
Bit 0 (LSB) of gain adjust word.
Table 1. Control Word Format and Function
MODE
PD
DACEN
F2EN
F1EN
No interpolation
0100
2x interpolation
0101
4x interpolation
0111
Standby
0
X
Power-down
1
X
Power-up
0
1
X
Table 2. Configuration Modes
X = Don’t care.
F1EN = 0, F2EN = 1: illegal condition.
GAIN ADJUSTMENT ON
CHANNEL A (dB)
G3
G2
G1
G0
+0.4
0000
0
1000
-0.35
1111
Table 3. Gain Difference Setting
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| 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(shù)模轉(zhuǎn)換器- DAC 10-Bit 2Ch 300Msps 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(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 |
| MAX5858AECM+TD | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 10-Bit 2Ch 300Msps 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(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 |
| MAX5858AECM-D | 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(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 |
| MAX5858AECM-TD | 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(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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