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参数资料
| 型号： | MAX5190BEEG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/15页 |
| 文件大小： | 0K |
| 描述： | IC DAC 8BIT 40MHZ VOUT 24-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 设置时间： | 25µs |
| 位数： | 8 |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 24-QSOP |
| 包装： | 管件 |
| 输出数目和类型： | 2 电压，单极 |
| 采样率（每秒）： | * |
| 产品目录页面： | 1397 (CN2011-ZH PDF) |
MAX5187/MAX5190
8-Bit, 40MHz, Current/Voltage-Output DACs
8
_______________________________________________________________________________________
Detailed Description
The MAX5187/MAX5190 are 8-bit DACs capable of
operating with clock speeds up to 40MHz. Each con-
verter consists of separate input and DAC registers, fol-
lowed by a current-source array capable of generating
up to 1.5mA full-scale output current (Figure 1). An inte-
grated +1.2V voltage reference and control amplifier
determine the data converters’ full-scale output cur-
rents/voltages. Careful reference design ensures close
gain matching and excellent drift characteristics. The
MAX5190’s voltage-output operation features matched
400
on-chip resistors that convert the current array
current into a voltage.
Internal Reference
and Control Amplifier
The MAX5187/MAX5190 provide an integrated
50ppm/°C, +1.2V, low-noise bandgap reference that
can be disabled and overridden by an external refer-
ence voltage. REFO serves either as an external refer-
ence input or an integrated reference output. If REN is
connected to DGND, the internal reference is selected
and REFO provides a +1.2V output. Due to its limited
10A output drive capability, REFO must be buffered
with an external amplifier if heavier loading is required.
The MAX5187/MAX5190 also employ a control amplifi-
er, designed to simultaneously regulate the full-scale
output current (IFS) for both outputs of the devices. The
output current is calculated as follows:
IFS = 8 x 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’s output current on the MAX5187 (Figure 2).
This current is mirrored into the current-source array,
where it is equally distributed between matched current
segments and summed to valid output current readings
for the DACs.
The MAX5190 converts this output current into a differ-
ential output voltage (VOUT) with two internal, ground-
referenced 400
load resistors. Using the internal
+1.2V reference voltage, the MAX5190’s integrated
reference output current resistor (RSET = 9.6k
) sets
IREF to 125A and IFS to 1mA.
REFR
REFO
1.2V REF
REN
CURRENT-
SOURCE ARRAY
DAC SWITCHES
400
400
*
MSB DECODE
CLK
OUTPUT
LATCHES
OUTPUT
LATCHES
MSB DECODE
*INTERNAL 400
AND 9.6k
RESISTORS FOR MAX5190 ONLY.
AVDD
AGND
CS
DACEN
PD
*
DVDD
DGND
D7–D0
MAX5187
MAX5190
CREF
OUTN
OUTP
INPUT
LATCHES
INPUT
LATCHES
9.6k*
Figure 1. Functional Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5190BEEG+ | 功能描述:数模转换器- DAC 8-Bit High Speed 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 |
| MAX5190BEEG+T | 功能描述:数模转换器- DAC 8-Bit High Speed 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 |
| MAX5190BEEG-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 |
| MAX5190E/D | 功能描述:数模转换器- DAC 8-Bit 40 MHz Current/Voltage-Output DACs 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 |
| MAX5190E/D DIE | 制造商:Maxim Integrated Products 功能描述: |
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