参数资料
| 型号： | ISL26322FVZ-T |
| 厂商： | Intersil |
| 文件页数： | 4/23页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT SPI/SRL 16-TSSOP |
| 标准包装： | 2,500 |
| 位数： | 12 |
| 采样率（每秒）： | 250k |
| 数据接口： | 串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 80mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 2 个差分，单极 |
ISL26320, ISL26321, ISL26322, ISL26323, ISL26324, ISL26325, ISL26329
12
FN8273.1
September 5, 2013
Circuit Description
The ISL26320, ISL26321, ISL26322, ISL26323, ISL26324,
ISL26325 and ISL26329 families 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 ISL26320, ISL26321, ISL26322, ISL26323,
ISL26324, ISL26325, ISL26329 families follow 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 ISL26320, ISL26321, ISL26322, ISL26323, ISL26324,
ISL26325 and ISL26329 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 ISL26320, the ISL26322, and the ISL26324 feature
differential inputs with output data coding in two's complement
format (see Table 1). The size of one LSB in these devices is
(2*VREF)/4096. Figure 21 illustrates the ideal transfer function
for these devices.
The ISL26321, ISL26323, ISL26325, and ISL26329 feature
single-ended inputs with output coding in binary format
(see Table 2). The size of one LSB in these devices is VREF/4096.
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
D
A
C
SAR
LOGIC
BUFFER
VCM
CNV
ACQ
COMPARATOR
VREF
CS
AIN
VREF
ACQ
CNV
ACQ
CNV
DA
C
D
A
C
SAR
LOGIC
BUFFER
VCM
CNV
ACQ
COMPARATOR
CS
相关PDF资料 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL26322FVZ-T7A | 功能描述:IC ADC 12BIT SPI/SRL 2CH 16TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 位数:10 采样率（每秒）:357k 数据接口:DSP，MICROWIRE?，QSPI?，串行，SPI? 转换器数目:1 功率耗散（最大）:830µW 电压电源:单电源 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:剪切带 (CT) 输入数目和类型:2 个单端，单极；2 个单端，双极；1 个差分，单极；1 个差分，双极 产品目录页面:1396 (CN2011-ZH PDF) 其它名称:MAX1395ETB+TCT |
| ISL26323 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:12-bit, 250kSPS Low-power ADCs with Single-ended and Differential Inputs and Multiple Input Channels |
| ISL26323FBZ | 功能描述:IC ADC 12BIT SPI/SRL 250K 8SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:250 系列:- 位数:12 采样率（每秒）:1.8M 数据接口:并联 转换器数目:1 功率耗散（最大）:1.82W 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:48-LQFP 供应商设备封装:48-LQFP（7x7） 包装:管件 输入数目和类型:2 个单端，单极 |
| ISL26323FBZ-T | 功能描述:IC ADC 12BIT SPI/SRL 250K 8SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:250 系列:- 位数:12 采样率（每秒）:1.8M 数据接口:并联 转换器数目:1 功率耗散（最大）:1.82W 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:48-LQFP 供应商设备封装:48-LQFP（7x7） 包装:管件 输入数目和类型:2 个单端，单极 |
| ISL26323FBZ-T7A | 功能描述:IC ADC 12BIT SPI/SRL 250K 8SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:250 系列:- 位数:12 采样率（每秒）:1.8M 数据接口:并联 转换器数目:1 功率耗散（最大）:1.82W 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:48-LQFP 供应商设备封装:48-LQFP（7x7） 包装:管件 输入数目和类型:2 个单端，单极 |
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