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參數(shù)資料
| 型號： | ISL26310FBZ-T7A |
| 廠商： | Intersil |
| 文件頁數(shù)： | 4/23頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT SPI/SRL 125K 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 250 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 125k |
| 數(shù)據(jù)接口： | 串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 80mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 1 個(gè)差分，單極 |
ISL26310, ISL26311, ISL26312, ISL26313, ISL26314, ISL26315, ISL26319
12
FN7549.2
February 26, 2014
Circuit Description
The ISL26310, ISL26311, ISL26312, ISL26313, ISL26314,
ISL26315 and ISL26319 families are of 12-bit ADCs are
low-power Successive Approximation-type (SAR) ADCs with 1-,
2-, 4-, or 8-channels and a choice of single-ended or differential
inputs. The high-impedance buffered input simplifies interfacing
to sensors and external circuitry.
The entire ISL26310, ISL26311, ISL26312, ISL26313, ISL26314,
ISL26315 and ISL26319 families are follows the same base
pinout and differs only in the analog input pins, allowing the user
to replicate the basic board layout across multiple platforms with
a minimum redesign effort.
The simple serial digital interface is compatible with popular
FPGAs and microcontrollers and allows direct conversion control
by the CNV pin.
Functional Description
The ISL26310, ISL26311, ISL26312, ISL26313, ISL26314,
ISL26315 and ISL26319 devices are SAR (Successive
Approximation Register) analog-to-digital converters that use
capacitor-based charge redistribution as their conversion
method.
These devices include an on-chip power-on reset (POR) circuit to
initialize the internal digital logic when power is applied. An
on-chip oscillator provides the master clock for the conversion
logic. The CNV signal controls when the converter enters into its
signal acquisition time (CNV = 0), and when it begins the
conversion sequence after the signal has been captured
(CNV = 1). The converters include a configuration register that
can be accessed via the serial port. The configuration register
has various bits to indicate which channel (where applicable) is
selected, to activate the auto-power-down feature where the ADC
is shut down between conversions, or to output the configuration
register contents along with the data conversion word whenever
a conversion word is read from the serial port. The serial port
supports three different modes of reading the conversion data.
These will be discussed later in this data sheet.
converter analog section for differential and single-ended inputs,
respectively. During the acquisition phase (CNV = 0) the input
signal is presented to the Cs samples capacitors. To properly
sample the signal, the CNV signal must remain low for the
specified time. When CNV is taken high (CNV = 1), the switches
that connect the sampling capacitors to the input are opened
and the control logic begins the successive approximation
sequence to convert the captured signal into a digital word. The
conversion sequence timing is determined by the on-chip
oscillator.
ADC Transfer Function
The ISL26310, ISL26312, and the ISL26314 feature differential
inputs with output data coding in two's complement format
(see Table 1). The size of one LSB in these devices is
these devices.
The ISL26311, ISL26313, ISL26315, and ISL26319 feature
single-ended inputs with output coding in binary format
Figure 22 illustrates the ideal transfer function for these devices.
FIGURE 19. ARCHITECTURAL BLOCK DIAGRAM, DIFFERENTIAL INPUT
FIGURE 20. ARCHITECTURAL BLOCK DIAGRAM, SINGLE-ENDED
AIN+
AIN
–
VREF
ACQ
CNV
ACQ
CNV
DA
C
DA
C
SAR
LOGIC
Buffer
VCM
CNV
ACQ
COMPARATOR
VREF
CS
AIN
VREF
ACQ
CNV
ACQ
CNV
DAC
DA
C
SAR
LOGIC
Buffer
VCM
CNV
ACQ
COMPARATOR
CS
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL26311 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:12-bit, 125kSPS Low-power ADCs with Single-ended and Differential Inputs and Multiple Input Channels |
| ISL26311FBZ | 制造商:Intersil Corporation 功能描述:ISL26311FBZ 12-BIT, 125KSPS, SINGLE CH/ENDED DIFFERENTIAL SA - Rail/Tube 制造商:Intersil Corporation 功能描述:IC ADC 12BIT SPI/SRL 125K 8-SOIC |
| ISL26311FBZ-T | 制造商:Intersil Corporation 功能描述:ISL26311FBZ 12-BIT, 125KSPS, SINGLE CH/ENDED DIFFERENTIAL SA - Tape and Reel 制造商:Intersil Corporation 功能描述:IC ADC 12BIT SPI/SRL 125K 8-SOIC |
| ISL26311FBZ-T7A | 制造商:Intersil Corporation 功能描述:ISL26311FBZ 12-BIT, 125KSPS, SINGLE CH/ENDED DIFFERENTIAL SA - Tape and Reel 制造商:Intersil Corporation 功能描述:IC ADC 12BIT SPI/SRL 125K 8SOIC |
| ISL26312 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:12-bit, 125kSPS Low-power ADCs with Single-ended and Differential Inputs and Multiple Input Channels |
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