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參數(shù)資料
| 型號(hào)： | HI5731 |
| 廠商： | Intersil Corporation |
| 英文描述： | 12-Bit, 100 MSPS, High Speed D/A Converter |
| 中文描述： | 12位，100 MSPS的，高速D / A轉(zhuǎn)換 |
| 文件頁(yè)數(shù)： | 11/15頁(yè) |
| 文件大?。?/td> | 370K |
| 代理商： | HI5731 |
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faster than the turn on time (TTL designs). Unequal delay
paths through the device can also cause one current source
to change before another. In order to minimize this, the
Intersil HI5731 employes an internal register, just prior to the
current sources, which is updated on the clock edge. Lastly,
the worst case glitch on traditional D/A converters usually
occurs at the major transition (i.e., code 2047 to 2048).
However, due to the split architecture of the HI5731, the
glitch is moved to the 255 to 256 transition (and every
subsequent 256 code transitions thereafter). This split R/2R
segmented current source architecture, which decreases the
amount of current switching at any one time, makes the
glitch practically constant over the entire output range. By
making the glitch a constant size over the entire output
range this effectively integrates this error out of the end
application.
In measuring the output glitch of the HI5731 the output is
terminated into a 64
load. The glitch is measured at any
one of the current cell carry (code 255 to 256 transition or
any multiple thereof) throughout the DACs output range.
The glitch energy is calculated by measuring the area under
the voltage-time curve. Figure 26 shows the area considered
as glitch when changing the DAC output. Units are typically
specified in picoVolt-seconds (pV-s).
Applications
Bipolar Applications
To convert the output of the HI5731 to a bipolar 4V swing,
the following applications circuit is recommended. The
reference can only provide 125
μ
A of drive, so it must be
buffered to create the bipolar offset current needed to
generate the -2V output with all bits ‘off’. The output current
must be converted to a voltage and then gained up and
offset to produce the proper swing. Care must be taken to
compensate for the voltage swing and error.
Interfacing to the HSP45106 NCO-16
The HSP45106 is a 16-bit, Numerically Controlled Oscillator
(NCO). The HSP45106 can be used to generate various
modulation schemes for Direct Digital Synthesis (DDS)
applications. Figure 28 shows how to interface an HI5731 to
the HSP45106.
Interfacing to the HSP45102 NCO-12
The HSP45102 is a 12-bit, Numerically Controlled Oscillator
(NCO). The HSP45102 can be used to generate various
modulation schemes for Direct Digital Synthesis (DDS)
applications. Figure 29 shows how to interface an HI5731 to
the HSP45102.
This high level block diagram is that of a basic PSK
modulator. In this example the encoder generates the PSK
waveform by driving the Phase Modulation Inputs (P1, P0) of
the HSP45102. The P1-0 inputs impart a phase shift to the
carrier wave as defined in Table 2.
The data port of the HSP45102 drives the 12-bit HI5731
DAC which converts the NCO output into an analog
waveform. The output filter connected to the DAC can be
tailored to remove unwanted spurs for the desired carrier
frequency. The controller is used to load the desired center
frequency and control the HSP45102. The HI5731 coupled
with the HSP45102 make an inexpensive PSK modulator
with Spurious Free performance down to -76dBc.
(21) I
OUT
100MHz
LOW PASS
FILTER
SCOPE
HI5731
64
50
FIGURE 25. GLITCH TEST CIRCUIT
FIGURE 26. MEASURING GLITCH ENERGY
a
(mV)
t
(ns)
GLITCH ENERGY = (
a
x
t
)/2
TABLE 3. PHASE MODULATION INPUT CODING
P1
P0
PHASE SHIFT (DEGREES)
0
0
0
0
1
90
1
0
270
1
1
180
HI5731
REF OUT
I
OUT
(21)
1
/
2
CA2904
+
-
+
-
+
-
50
5k
1
/
2
CA2904
5k
60
240
240
HFA1100
V
OUT
0.1
μ
F
FIGURE 27. BIPOLAR OUTPUT CONFIGURATION
(26)
HI5731
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HI5731-EVS | 12-Bit, 100 MSPS, High Speed D/A Converter |
| HI5731BIP | LOW SIGNAL RELAY |
| HI5740 | 3V， Dual 10-Bit， 20/ 40/60 MSPS A/D Converter with Internal Voltage Reference (2 pages) FN4821 |
| HI5741BIB-T | 14-Bit Digital-to-Analog Converter |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HI5731_04 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:12-Bit, 100MSPS, High Speed D/A Converter |
| HI5731BIB | 功能描述:IC DAC 12-BIT 100MSPS 28-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:2,400 系列:- 設(shè)置時(shí)間:- 位數(shù):18 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:3 電壓電源:模擬和數(shù)字 功率耗散（最大）:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:36-TFBGA 供應(yīng)商設(shè)備封裝:36-TFBGA 包裝:帶卷 (TR) 輸出數(shù)目和類型:* 采樣率（每秒）:* |
| HI5731BIB-T | 功能描述:DAC 12BIT 100MHZ 5.2V 28-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:2,400 系列:- 設(shè)置時(shí)間:- 位數(shù):18 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:3 電壓電源:模擬和數(shù)字 功率耗散（最大）:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:36-TFBGA 供應(yīng)商設(shè)備封裝:36-TFBGA 包裝:帶卷 (TR) 輸出數(shù)目和類型:* 采樣率（每秒）:* |
| HI5731BIBZ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 28 INDTEMP D/A 12 BIT 100MHZ -5 2V 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 |
| HI5731BIBZ-T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 28 INDTEMP D/A 12 BIT 100MHZ -5 2V 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 |
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