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參數(shù)資料
| 型號(hào)： | MAX5858ECM+TD |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 13/23頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 10BIT DUAL 300MSPS 48TQFP |
| 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)： | 10 |
| 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）： | 816mW |
| 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 |
MAX5858
Dual, 10-Bit, 300Msps, Current-Output DAC with
4x/2x/1x Interpolation Filters
20
______________________________________________________________________________________
Differential DC-Coupled Configuration
Figure 9 shows the MAX5858 output operating in differ-
ential, DC-coupled mode. This configuration can be
used in communication systems employing analog
quadrature upconverters and requiring a baseband
sampling, dual-channel, high-speed DAC for I/Q syn-
thesis. In these applications, information bandwidth can
extend from 10MHz down to several hundred kilohertz.
DC-coupling is desirable in order to eliminate long dis-
charge time constants that are problematic with large,
expensive coupling capacitors. Analog quadrature
upconverters have a DC common-mode input require-
ment of typically 0.7V to 1.0V. The MAX5858 differential
I/Q outputs can maintain the desired full-scale frequen-
cy spectrum at the required 0.7V to 1.0V DC common-
mode level when powered from a single 2.85V (±5%)
supply. The MAX5858 meets this low-power require-
ment with minimal reduction in dynamic range while
eliminating the need for level-shifting resistor networks.
Power Supplies, Bypassing,
Decoupling, and Layout
Grounding and power-supply decoupling strongly influ-
ence the MAX5858 performance. Unwanted digital
crosstalk can couple through the input, reference,
power-supply, and ground connections, which can
affect dynamic specifications, like signal-to-noise ratio
or spurious-free dynamic range. In addition, electro-
magnetic interference (EMI) can either couple into or
be generated by the MAX5858. Observe the grounding
and power-supply decoupling guidelines for high-
speed, high-frequency applications. Follow the power
supply and filter configuration to realize optimum
dynamic performance.
Use of a multilayer printed circuit (PC) board with sepa-
rate ground and power-supply planes is recommend-
ed. Run high-speed signals on lines directly above the
ground plane. The MAX5858 has separate analog and
digital ground buses (AGND, CGND, and DGND,
DA0–DA9
10
MAX5858
1/2
50
100
50
OUTPA
OUTNA
VOUTA,
SINGLE ENDED
DB0–DB9
10
MAX5858
1/2
50
100
50
OUTPB
OUTNB
VOUTB,
SINGLE ENDED
CVDD
DVDD
AVDD
CGND
DGND
AGND
Figure 8. Application with Output Transformer Performing
Differential to Single-Ended Conversion
DA0–DA9
10
MAX5858
1/2
50
50
CVDD
DVDD
AVDD
CGND
DGND
AGND
OUTPA
OUTNA
DB0–DB9
10
MAX5858
50
50
OUTPB
OUTNB
Figure 9. Application with DC-Coupled Differential Outputs
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