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| 型号： | DAC5652AIPFBRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | DAC |
| 英文描述： | DUAL, PARALLEL, WORD INPUT LOADING, 0.02 us SETTLING TIME, 10-BIT DAC, PQFP48 |
| 封装： | GREEN, PLASTIC, TQFP-48 |
| 文件页数： | 7/25页 |
| 文件大小： | 511K |
| 代理商： | DAC5652AIPFBRG4 |
V
OUTDIFF +
V
OUT1 *
V
OUT2
V
OUTDIFF +
(2
Code * 1023)
1024
I
OUTFS
R
LOAD
AVDD
Current Source Array
IOUT1
IOUT2
S(1)
S(1)C
RLOAD
S(2)
S(2)C
S(N)
S(N)C
www.ti.com
SLAS535B – SEPTEMBER 2007 – REVISED DECEMBER 2010
The total differential output voltage is:
(7)
(8)
Analog Outputs
The DAC5652A provides two complementary current outputs, IOUT1 and IOUT2. The simplified circuit of the
analog output stage representing the differential topology is shown in Figure 17. The output impedance of IOUT1
and IOUT2 results from the parallel combination of the differential switches, along with the current sources and
associated parasitic capacitances.
Figure 17. Analog Outputs
The signal voltage swing that may develop at the two outputs, IOUT1 and IOUT2, is limited by a negative and
positive compliance. The negative limit of –1 V is given by the breakdown voltage of the CMOS process and
exceeding it compromises the reliability of the DAC5652A (or even causes permanent damage). With the
full-scale output set to 20 mA, the positive compliance equals 1.2 V. Note that the compliance range decreases
to about 1 V for a selected output current of I(OUTFS) = 2 mA. Care must be taken that the configuration of
DAC5652A does not exceed the compliance range to avoid degradation of the distortion performance and
integral linearity.
Best distortion performance is typically achieved with the maximum full-scale output signal limited to
approximately 0.5 VPP. This is the case for a 50- doubly-terminated load and a 20-mA full-scale output current.
A variety of loads can be adapted to the output of the DAC5652A by selecting a suitable transformer while
maintaining optimum voltage levels at IOUT1 and IOUT2. Furthermore, using the differential output configuration
in combination with a transformer is instrumental for achieving excellent distortion performance. Common-mode
errors, such as even-order harmonics or noise, can be substantially reduced. This is particularly the case with
high output frequencies.
For those applications requiring the optimum distortion and noise performance, it is recommended to select a
full-scale output of 20 mA. A lower full-scale range of 2 mA may be considered for applications that require low
power consumption, but can tolerate a slight reduction in performance level.
Output Configurations
The current outputs of the DAC5652A allow for a variety of configurations. As mentioned previously, utilizing the
converter’s differential outputs yield the best dynamic performance. Such a differential output circuit may consist
of an RF transformer or a differential amplifier configuration. The transformer configuration is ideal for most
applications with ac coupling, while op amps are suitable for a dc-coupled configuration.
Copyright 2007–2010, Texas Instruments Incorporated
15
Product Folder Link(s): DAC5652A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DAC5652-EP | 制造商:TI 制造商全称:Texas Instruments 功能描述:DUAL 10-BIT 200-MSPS DIGITAL-TO-ANALOG CONVERTER |
| DAC5652EVM | 功能描述:数据转换 IC 开发工具 DAC5652 evaluation Module RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| DAC5652IPFB | 功能描述:数模转换器- DAC Dual 10bit 200MSPS 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 |
| DAC5652IPFBG4 | 功能描述:数模转换器- DAC Dual 10bit 200MSPS 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 |
| DAC5652IPFBR | 功能描述:数模转换器- DAC Dual 10bit 200MSPS 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 |
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