參數(shù)資料
型號(hào)： DAC8832IBRGY
廠商： Texas Instruments, Inc.
英文描述： 16-Bit, Ultra-Low Power, Voltage-Output Digital-to-Analog Converter
中文描述： 16位，超低功耗，電壓輸出數(shù)字模擬轉(zhuǎn)換器
文件頁(yè)數(shù)： 15/26頁(yè)
文件大小： 702K
代理商： DAC8832IBRGY
www.ti.com
THEORY OF OPERATION
GENERAL DESCRIPTION
The DAC8832 is a single, 16-bit, serial-input, voltage-output DAC. It operates from a single supply ranging from
2.7 V to 5 V, and typically consumes 5
μ
A. Data are written to this device in a 16-bit word format, via an SPI
serial interface. To ensure a known power-up state, the DAC8832 is designed with a power-on reset function.
The DAC8832 is reset to mid-scale code. In unipolar mode, the DAC8832 is reset to 1/2
×
V
REF
, and in bipolar
mode, is reset to 0 V. Kelvin sense connections for the reference and analog ground are also included.
DIGITAL-TO-ANALOG SECTIONS
The DAC architecture consists of two matched DAC sections and is segmented. A simplified circuit diagram is
shown in
Figure 43
. The four MSBs of the 16-bit data word are decoded to drive 15 switches, E1 to E15. Each
of these switches connects one of 15 matched resistors to either AGND or V
. The remaining 12 bits of the
data word drive switches S0 to S11 of a 12-bit voltage mode R-2R ladder network.
R
R
12Bit R2R Ladder
Four MSBs Decoded into
15 Equal Segments
2R
2R
2R
2R
S0
S1
S11
2R
V
OUT
E15
2R
E2
2R
E1
V
REF
OUTPUT RANGE
The output of the DAC is:
DAC8832
SBAS380A–FEBRUARY 2006–REVISED APRIL 2006
Figure 43. DAC Architecture
V
OUT
= (V
REF
× Code)/65536
Where
Code
is the decimal data word loaded to the DAC latch.
15
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DAC8832IBRGYR 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16B Ultra-Lo Pwr Vltg Output DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC8832IBRGYRG4 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16B Ultra-Lo Pwr Vltg Output DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC8832IBRGYT 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16B Ultra-Lo Pwr Vltg Output DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC8832IBRGYTG4 功能描述:數(shù)模轉(zhuǎn)換器- DAC 16B Ultra-Lo Pwr Vltg Output DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
DAC8832ICRGY 制造商:TI 制造商全稱:Texas Instruments 功能描述:16-Bit, Ultra-Low Power, Voltage-Output Digital-to-Analog Converter
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