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參數(shù)資料
| 型號： | HI5746KCB-T |
| 廠商： | Intersil |
| 文件頁數(shù)： | 5/16頁 |
| 文件大小： | 0K |
| 描述： | CONV A/D 10BIT 40MSPS 28-SOIC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 位數(shù)： | 10 |
| 采樣率（每秒）： | 40M |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 8 |
| 功率耗散（最大）： | 275 mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-SOIC W |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 2 個單端，單極；2 個單端，雙極；1 個差分，單極；1 個差分，雙極 |
13
at positive full scale when the VIN+ input is at
VDC + 0.25V and the VIN- input is at VDC - 0.25V (VIN+ -
VIN- = +0.5V). Conversely, the converter will be at
negative fullscale when the VIN+ input is equal to VDC -
0.25V and VIN- is at VDC + 0.25V (VIN+ - VIN- = -0.5V).
The analog input can be DC coupled (Figure 27) as long as
the inputs are within the analog input common mode voltage
range (0.25V
≤ VDC ≤ 4.75V).
The resistors, R, in Figure 27 are not absolutely necessary
but may be used as load setting resistors. A capacitor, C,
connected from VIN+ to VIN- will help filter any high
frequency noise on the inputs, also improving performance.
Values around 20pF are sufficient and can be used on AC
coupled inputs as well. Note, however, that the value of
capacitor C chosen must take into account the highest
frequency component of the analog input signal.
Analog Input, Single-Ended Connection
The configuration shown in Figure 28 may be used with a
single ended AC coupled input.
Again, assume the difference between VREF+, typically 2.5V,
and VREF-, typically 2V, is 0.5V. If VIN is a 1VP-P sinewave,
then VIN+ is a 1VP-P sinewave riding on a positive voltage
equal to VDC. The converter will be at positive full scale
when VIN+ is at VDC + 0.5V (VIN+ - VIN- = +0.5V) and will
be at negative full scale when VIN+ is equal to
VDC - 0.5V (VIN+ - VIN- = -0.5V). Sufficient headroom must
be provided such that the input voltage never goes above
+5V or below AGND. In this case, VDC could range between
0.5V and 4.5V without a significant change in ADC
performance. The simplest way to produce VDC is to use the
DC bias source, VDC, output of the HI5746.
The single ended analog input can be DC coupled
(Figure 27) as long as the input is within the analog input
common mode voltage range.
The resistor, R, in Figure 29 is not absolutely necessary but
may be used as a load setting resistor. A capacitor, C,
connected from VIN+ to VIN- will help filter any high
frequency noise on the inputs, also improving performance.
Values around 20pF are sufficient and can be used on AC
coupled inputs as well. Note, however, that the value of
capacitor C chosen must take into account the highest
frequency component of the analog input signal.
A single ended source may give better overall system
performance if it is first converted to differential before
driving the HI5746.
Digital Output Control and Clock Requirements
The HI5746 provides a standard high-speed interface to
external TTL logic families.
In order to ensure rated performance of the HI5746, the duty
cycle of the clock should be held at 50%
±5%. It must also
have low jitter and operate at standard TTL levels.
Performance of the HI5746 will only be guaranteed at
conversion rates above 1 MSPS. This ensures proper
performance of the internal dynamic circuits. Similarly, when
power is first applied to the converter, a maximum of 20
cycles at a sample rate above 1 MSPS will have to be
performed before valid data is available.
A Data Format Select (DFS) pin is provided which will
determine the format of the digital data outputs. When at
logic low, the data will be output in offset binary format.
When at logic high, the data will be output in two’s
complement format. Refer to Table 1 for further information.
VIN+
VDC
VIN-
HI5746
VIN
-VIN
R
C
VDC
FIGURE 27. DC COUPLED DIFFERENTIAL INPUT
VIN+
VIN-
HI5746
VIN
VDC
R
FIGURE 28. AC COUPLED SINGLE ENDED INPUT
VIN+
VIN-
HI5746
VDC
R
C
VIN
VDC
FIGURE 29. DC COUPLED SINGLE ENDED INPUT
HI5746
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| HI5746KCBZ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 28 COMTEMP A/D 10BIT 40MSPS RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| HI5746KCBZ-T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC HI5746KCB IN TAPE RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| HI-574A | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Complete, 12-Bit A/D Converters with Microprocessor Interface |
| HI-574A_01 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Complete, 12-Bit A/D Converters with Microprocessor Interface |
| HI-574A_08 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Complete, 12-Bit A/D Converters with Converters with Microprocessor Interface |
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