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參數(shù)資料
| 型號： | MAX5894EGK+TD |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 4/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 14BIT DUAL 500MSPS 68-QFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 設(shè)置時間： | 11ns |
| 位數(shù)： | 14 |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 2 |
| 電壓電源： | 模擬和數(shù)字 |
| 功率耗散（最大）： | 886mW |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 68-VFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 68-QFN 裸露焊盤（10x10） |
| 包裝： | 帶卷 (TR) |
| 輸出數(shù)目和類型： | 2 電流，單極 |
| 采樣率（每秒）： | 500M |
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MAX5894
14-Bit, 500Msps, Interpolating and Modulating
Dual DAC with CMOS Inputs
12
______________________________________________________________________________________
Detailed Description
The MAX5894 dual, 500Msps, high-speed, 14-bit, cur-
rent-output DAC provides superior performance in
communication systems requiring low-distortion ana-
log-signal reconstruction. The MAX5894 combines two
DAC cores with 8x/4x/2x/1x programmable digital inter-
polation filters, a digital quadrature modulator, an SPI-
compatible serial interface for programming the device,
and an on-chip 1.20V reference. The full-scale output
current range is programmable from 2mA to 20mA to
optimize power dissipation and gain control.
Each channel contains three selectable interpolating fil-
ters making the MAX5894 capable of 1x, 2x, 4x, or 8x
interpolation, which allows for low input data rates and
high DAC update rates. When operating in 8x interpola-
tion mode, the interpolator increases the DAC conver-
sion rate by a factor of eight, providing an eight-fold
increase in separation between the reconstructed
waveform spectrum and its first image. The MAX5894
accepts either two’s complement or offset binary input
data format and can operate from either a single- or
dual-port input bus.
The MAX5894 includes modulation modes at fIM/2 and
fIM/4, where fIM is the data rate at the input of the modu-
lator. If 2x interpolation is used, this data rate is 2x the
input data rate. If 4x or 8x interpolation is used, this data
rate is 4x the input data rate. Table 1 summarizes the
modulator operating data rates for dual-port mode.
The power-down modes can be used to turn off each
DAC’s output current or the entire digital section.
Programming both DACs into power-down simultane-
ously automatically powers down the digital interpolator
filters. Note the SPI section is always active.
The analog and digital sections of the MAX5894 have
separate power-supply inputs (AVDD3.3, AVDD1.8,
AVCLK, DVDD3.3, and DVDD1.8), which minimize noise
coupling from one supply to the other. AVDD1.8 and
DVDD1.8 operate from a typical 1.8V supply, and all
other supply inputs operate from a typical 3.3V supply.
Serial Interface
The SPI-compatible serial interface programs the
MAX5894 registers. The serial interface consists of the
CS, DIN, SCLK, and DOUT. Data is shifted into DIN on
the rising edge of the SCLK when CS is low. When CS
is high, data presented at DIN is ignored and DOUT is
in high-impedance mode. Note:
CS must transition
high after each read/write operation. DOUT is the
serial data output for reading registers to facilitate easy
debugging during development. DIN and DOUT can
be connected together to form a 3-wire serial interface
bus or remain separate and form a 4-wire SPI bus.
The serial interface supports two-byte transfer in a
communication cycle. The first byte is a control byte
written to the MAX5894 only. The second byte is a data
byte and can be written to or read from the MAX5894.
Table 1. Quadrature Modulator Operating Data Rates (fIM is the Data Rate at the Input of
the Modulator) for Dual-Port Mode
INTERPOLATION RATE
MODULATION MODE (fLO)
MODULATION FREQUENCY
RELATIVE TO fDAC
MODULATION FREQUENCY
RELATIVE TO fDATA
fIM/2
fDAC/2
fDATA/2
1x
fIM/4
fDAC/4
fDATA/4
fIM/2
fDAC/2
fDATA
2x
fIM/4
fDAC/4
fDATA/2
fIM/2
fDAC/2
2 x fDATA
4x
fIM/4
fDAC/4
fDATA
fIM/2
fDAC/4
2 x fDATA
8x
fIM/4
fDAC/8
fDATA
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參數(shù)描述 |
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| MAX5894EVCMOD2 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Evaluation Kit for the MAX5893/MAX5894/MAX5895 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 |
| MAX5894EVKIT | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Evaluation Kit for the MAX5893/MAX5894/MAX5895 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 |
| MAX5895EGK+D | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit 2Ch 500Msps 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 |
| MAX5895EGK+TD | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16-Bit 2Ch 500Msps 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 |
| MAX5895EGK-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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