参数资料
型号: MAX5894EGK+D
厂商: Maxim Integrated Products
文件页数: 21/32页
文件大小: 0K
描述: IC DAC 14BIT DUAL 500MSPS 68-QFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 30
设置时间: 11ns
位数: 14
数据接口: 并联
转换器数目: 2
电压电源: 模拟和数字
功率耗散(最大): 886mW
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 68-VFQFN 裸露焊盘
供应商设备封装: 68-QFN 裸露焊盘(10x10)
包装: 管件
输出数目和类型: 2 电流,单极
采样率(每秒): 500M
MAX5894
REFIO must be buffered with an external amplifier, if heavy
loading is required, due to its 10k
output resistance.
Alternatively, apply a temperature-stable external refer-
ence to REFIO (Figure 18). The internal reference is over-
driven by the external reference. For improved accuracy
and drift performance, choose a fixed output voltage ref-
erence such as the MAX6520 bandgap reference.
The MAX5894’s reference circuit (Figure 19) employs a
control amplifier, designed to regulate the full-scale cur-
rent IOUT for the differential current outputs of the DAC.
The output current can be calculated as:
IOUTFS = 32 x IREF x 16383/16384
where IREF is the reference output current (IREF = VREFIO/
RSET). Located between FSADJ and DACREF, RSET is the
reference resistor, which determines the amplifier’s output
current for the DAC. Use Table 5 for a matrix of different
IOUTFS and RSET selections.
14-Bit, 500Msps, Interpolating and Modulating
Dual DAC with CMOS Inputs
28
______________________________________________________________________________________
Figure 18. Typical External Reference Circuit
1.2V
REFERENCE
CURRENT-
SOURCE
ARRAY DAC
REFIO
EXTERNAL
1.25V
REFERENCE
RSET
FSADJ
IREF
10k
DACREF
1
F
MAX5894
1.2V
REFERENCE
CURRENT-
SOURCE
ARRAY DAC
REFIO
FSADJ
IREF
10k
DACREF
1
F
MAX5894
RSET
FULL-SCALE
CURRENT
REFERENCE
CURRENT
RSET (k
)
OUTPUT VOLTAGE
IOUTFS (mA)
IREF (A)
CALCULATED
1% EIA STD
VIOUTP/N* (mVP-P)
2
62.50
19.2
19.1
100
5
156.26
7.68
7.5
250
10
312.50
3.84
3.83
500
15
468.75
2.56
2.55
750
20
625.00
1.92
1.91
1000
Figure 19. MAX5894 Internal Reference Architecture
Table 5. IOUTFS and RSET Selection Matrix Based on a Typical 1.20V Reference Voltage
*
Terminated into a 50
load.
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MAX5894EGK-TD 功能描述:数模转换器- DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MAX5894EVCMOD2 功能描述:数模转换器- DAC Evaluation Kit for the MAX5893/MAX5894/MAX5895 RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MAX5894EVKIT 功能描述:数模转换器- DAC Evaluation Kit for the MAX5893/MAX5894/MAX5895 RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MAX5895EGK+D 功能描述:数模转换器- DAC 16-Bit 2Ch 500Msps DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MAX5895EGK+TD 功能描述:数模转换器- DAC 16-Bit 2Ch 500Msps DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube