參數(shù)資料
型號(hào)： MAX5856AECM+TD
廠(chǎng)商： Maxim Integrated Products
文件頁(yè)數(shù)： 5/23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(lèi)型： 表面貼裝
封裝/外殼： 48-TQFP 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 48-TQFP 裸露焊盤(pán)（7x7）
包裝： 帶卷 (TR)
輸出數(shù)目和類(lèi)型： 2 電流，單極
采樣率（每秒）： 300M
MAX5856A
Dual 8-Bit, 300Msps DAC with 4x/2x/1x
Interpolation Filters and PLL
______________________________________________________________________________________
13
Detailed Description
The MAX5856A dual, high-speed, 8-bit, current-output
DAC provides superior performance in communication
systems requiring low-distortion analog-signal recon-
struction. The MAX5856A combines two DAC cores with
4x/2x/1x programmable digital interpolation filters, a PLL
clock multiplier, divide-by-N clock output, and an on-
chip 1.24V reference. The DAC current outputs can be
configured for differential or single-ended operation. The
full-scale output current range is adjustable from 2mA to
20mA to optimize power dissipation and gain control.
The MAX5856A accepts an input data rate up to
165MHz or a DAC conversion rate up to 300MHz. The
inputs are latched on the rising edge of the clock. The
outputs are latched on the following rising edge.
The two-stage digital interpolation filters are program-
mable to 4x, 2x, or no interpolation. When operating in
4x interpolation mode, the interpolator increases the
DAC conversion rate by a factor of four, providing a
four-fold increase in separation between the recon-
structed waveform spectrum and its first image.
The on-chip PLL clock multiplier generates and distrib-
utes all internal, synchronized high-speed clock signals
required by the input data latches, interpolation filters,
and DAC cores. The on-chip PLL includes phase
detector, VCO, prescalar, and charge pump circuits.
The PLL can be enabled or disabled through PLLEN.
The analog and digital sections of the MAX5856A have
separate power supply inputs (AVDD and DVDD). Also,
a separate supply input is provided for the PLL clock
multiplier (PVDD). AVDD, DVDD, and PVDD operate from
a 2.7V to 3.3V single supply.
The MAX5856A features three power modes: normal,
standby, and power-down. These modes allow efficient
power management. In power-down, the MAX5856A
consumes only 1A of supply current. Wake-up time
from standby mode to normal DAC operation is 0.7s.
Programming the DAC
An 8-bit control word routed through channel A’s data
port programs the gain matching, interpolator configu-
ration, and operational mode of the MAX5856A. The
control word is latched on the falling edge of control-
word write pulse (CW). The CW signal is asynchronous
with CLK and CLKXN/CLKXP; therefore, the conversion
clock (CLK or CLKXN/CLKXP) can run uninterrupted
when a control word is written to the device.
Table 1 illustrates the control word format and function.
The gain on channel A can be adjusted to achieve gain
matching between two channels in a user’s system.
The gain on channel A can be adjusted from +0.4dB to
-0.35dB in steps of 0.05dB by using bits G3 to G0 (see
Table 3).
INPUT
REGISTER
2x DIGITAL
INTERPOLATION
FILTER
2x DIGITAL
INTERPOLATION
FILTER
8-BIT
300MHz
DAC
PLL CLOCK MULTIPLIER
1.2V REFERENCE AND CONTROL AMPLIFIER
88
8
INPUT
REGISTER
2x DIGITAL
INTERPOLATION
FILTER
2x DIGITAL
INTERPOLATION
FILTER
8-BIT
300MHz
DAC
88
8
OUTPA
OUTNA
REFO
REFR
CLKXP
CLK
DA7–DA0
F1EN
F2EN
CLKXN
OUTPB
OUTNB
DB7–DB0
CONTROL REGISTER
AGND
PGND
DVDD
PVDD
DGND
AVDD
RSET
PLLF
PLLEN
LOCK
IDE
CW
REN
MAX5856A
Functional Diagram
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參數(shù)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(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(lèi)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(lèi)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(lèi)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(lèi)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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