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参数资料
| 型号： | MAX5851ETL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/18页 |
| 文件大小： | 0K |
| 描述： | IC DAC 8BIT DUAL 80MSPS 40-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 设置时间： | 12ns |
| 位数： | 8 |
| 数据接口： | 并联 |
| 转换器数目： | 2 |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（6x6） |
| 包装： | 带卷 (TR) |
| 输出数目和类型： | 4 电流，单极 |
| 采样率（每秒）： | 80M |
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
______________________________________________________________________________________
13
IFS
CCOMP*
REFR
IREF
REFO
MAX4040
1.24V
BANDGAP
REFERENCE
CURRENT-
SOURCE
ARRAY
*COMPENSATION CAPACITOR (CCOMP ≈ 100nF)
OPTIONAL EXTERNAL BUFFER
FOR HEAVIER LOADS
MAX5851
IREF =
VREF
RSET
AGND
REN = 0
Figure 3. Setting IFS with the Internal 1.24V Reference and the
Control Amplifier
Internal Reference and Control Amplifier
The MAX5851 provides an integrated 50ppm/°C, 1.24V,
low-noise bandgap reference that can be disabled and
overridden with an external reference voltage. REFO
serves either as an external reference input or an inte-
grated reference output. If REN = 0, the internal refer-
ence is selected and REFO provides a 1.24V (50A)
output. Buffer REFO with an external amplifier when dri-
ving a heavy load.
The MAX5851 also employs a control amplifier
designed to simultaneously regulate the full-scale out-
put current (IFS) for both outputs of the devices.
Calculate the output current as:
IFS = 32 IREF
where IREF is the reference output current (IREF =
VREFO / RSET) and IFS is the full-scale output current. RSET
is the reference resistor that determines the amplifier out-
put current of the MAX5851 (Figure 3). This current is mir-
rored into the current-source array where IFS is equally
distributed between matched current segments and
summed to valid output current readings for the DACs.
External Reference
To disable the internal reference of the MAX5851, set
REN = 1. Apply a temperature-stable, external reference
to drive the REFO pin and set the full-scale output
(Figure 4). For improved accuracy and drift performance,
choose a fixed-output voltage reference such as the
1.2V, 25ppm/°C MAX6520 bandgap reference.
Detailed Timing
The MAX5851 accepts an input data and DAC con-
version rate of up to 80Msps. The input latches on the
rising edge of the clock, whereas the output latches
on the following rising edge.
Figure 5 depicts the write cycle of the two DACs in non-
interleaved mode.
The MAX5851 can also operate in an interleaved data
mode. Programming the IDE bit with a high level activates
this mode (Tables 1 and 2). In interleaved mode, data for
both DAC channels is written through input port A.
Channel B data is written on the falling edge of the clock
signal and then channel A data is written on the following
rising edge of the clock signal. Both DAC outputs (chan-
nel A and B) are updated simultaneously on the next fol-
lowing rising edge of the clock. The interleaved data
mode is attractive for applications where lower data rates
are acceptable and interfacing on a single 8-bit bus is
desired (Figure 6).
AVDD
EXTERNAL
1.2V
REFERENCE
MAX6520
AGND
0.1F
10F
AVDD
AGND
IFS
REFR
IREF
REFO
1.24V
BANDGAP
REFERENCE
CURRENT-
SOURCE
ARRAY
MAX5851
RSET
AGND
REN = 1
Figure 4. MAX5851 with External Reference
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5852ETL | 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 |
| MAX5852ETL+ | 功能描述:数模转换器- DAC 8-Bit 2Ch 165Msps 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 |
| MAX5852ETL+T | 功能描述:数模转换器- DAC 8-Bit 2Ch 165Msps 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 |
| MAX5852ETL-T | 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 |
| MAX5852EVKIT | 功能描述:数模转换器- DAC Evaluation Kit for the MAX5851 MAX5852 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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