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参数资料
| 型号： | MAX5105EEP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 19/19页 |
| 文件大小： | 0K |
| 描述： | IC DAC 8BIT QUAD NV 20-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 设置时间： | 6µs |
| 位数： | 8 |
| 数据接口： | 串行 |
| 转换器数目： | 4 |
| 电压电源： | 单电源 |
| 功率耗散（最大）： | 727.3mW |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 20-QSOP |
| 包装： | 管件 |
| 输出数目和类型： | 4 电压，单极 |
| 采样率（每秒）： | * |
| 产品目录页面： | 1397 (CN2011-ZH PDF) |
MAX5105/MAX5106
Nonvolatile, Quad, 8-Bit DACs
________________________________________________________________________________________
9
DAC Operation
The MAX5105/MAX5106 use a matrix decoding archi-
tecture for the DACs, which saves power in the overall
system. A resistor string placed in a matrix fashion
divides down the difference between the external refer-
ence voltages, VREFH and VREFL. Row and column
decoders select the appropriate tab from the resistor
string, providing the needed analog voltages. The
resistor string presents a code-independent input
impedance to the reference and guarantees a monoto-
nic output. Figure 1 shows a simplified diagram of one
of the four DACs.
Output Buffer Amplifiers
All MAX5105/MAX5106 analog outputs are internally
buffered by precision unity-gain followers that slew at
about 0.5V/s. The outputs can swing from GND to
VDD. With a VREFL_ to VREFH_ (or VREFH_to VREFL_)
output transition, the amplifier outputs typically settle to
±1/2LSB in 6s when loaded with 10k
in parallel with
100pF.
The software mute/shutdown command independently
drives each output to its respective REFL_ voltage
(mute) or to a high-impedance state (shutdown).
Placing all four DACs in shutdown reduces supply cur-
rent to 10A (max). The MAX5105 also provides an
asynchronous MUTE input, simultaneously driving all
DAC outputs to their respective REFL_ voltages.
Internal EEPROM
The MAX5105/MAX5106 internal EEPROM consists of
five nonvolatile registers that retain the DAC output and
operating states after the device is powered down.
Four registers store data for each DAC, and one stores
the mute and shutdown states for the device.
DAC Registers
The MAX5105/MAX5106 have eight 8-bit DAC regis-
ters, four volatile and four nonvolatile, that store DAC
data. The four volatile DAC registers hold the current
value of each DAC. Data is written to these registers in
two ways: directly from DIN or loaded from the respec-
tive nonvolatile registers (see Serial Input Data Format
and Control Codes). These registers are cleared when
the device is shut down or power is removed.
The four nonvolatile registers retain the DAC values
even after power is removed. Stored data is accessed
in two ways: transferring data to a volatile register to
update the respective DAC output or reading data
through DOUT (see Serial Input Data Format and
Control Codes). On power-up, the device is automati-
cally initialized with data stored in the nonvolatile regis-
ters.
Mute/Shutdown Registers
The MAX5105/MAX5106 have two 8-bit mute/shutdown
registers that store the operating state of each DAC.
The four MSBs hold the mute states, and the four LSBs
hold the shutdown states (Table 1). The volatile regis-
ters hold the current mute/shutdown state of each DAC.
Like the DAC registers, the nonvolatile mute/shutdown
register maintains its data after the device is powered
down, and the contents can be read on DOUT. The
volatile register is initialized with the nonvolatile data on
power-up and can be loaded through DIN or from the
nonvolatile register (see Serial Input Data Format and
Control Codes).
REFH
REFL
R1
R15
R16
R255
R0
D7
D6
D5
D4
DAC
MSB
DECODER
D3
D0
D2
D1
LSB DECODER
Figure 1. DAC Simplified Circuit Diagram
Table 1. Mute/Shutdown Register Mapping
Bit in
Register
D7
(MSB)
D6
D5
D4
D3
D2
D1
D0
(LSB)
Controlling
Function
Mute
DAC3
Mute
DAC2
Mute
DAC1
Mute
DAC0
Shutdown
DAC3
Shutdown
DAC2
Shutdown
DAC1
Shutdown
DAC0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5105EEP+ | 功能描述:数模转换器- DAC 8-Bit 4Ch Precision 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 |
| MAX5105EEP+T | 功能描述:数模转换器- DAC 8-Bit 4Ch Precision 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 |
| MAX5105EEP-T | 功能描述:数模转换器- DAC 8-Bit 4Ch Precision 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 |
| MAX5105EWP | 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 |
| MAX5105EWP+ | 功能描述:数模转换器- DAC 8-Bit 4Ch Precision 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 |
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