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参数资料
| 型号： | AD7715ARUZ-5REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 30/40页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT SIGMA-DELTA 16TSSOP |
| 标准包装： | 1,000 |
| 位数： | 16 |
| 采样率（每秒）： | 500 |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 9.5mW |
| 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： | 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： | 1 个差分，单极；1 个差分，双极 |
| 配用： | EVAL-AD7715-3EBZ-ND - BOARD EVALUATION FOR AD7715 |
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AD7715
Rev. D | Page 36 of 40
APPLICATIONS INFORMATION
The AD7715 provides a low cost, high resolution analog-to-
digital function. Because the analog-to-digital function is
provided by a Σ-Δ architecture, it makes the part more immune
to noisy environments thus making the part ideal for use in
industrial and process control applications. It also provides a
programmable gain amplifier, a digital filter and calibration
options. Thus, it provides far more system level functionality
than off-the-shelf integrating ADCs without the disadvantage
of having to supply a high quality integrating capacitor. In
addition, using the AD7715 in a system allows the system
designer to achieve a much higher level of resolution because
noise performance of the AD7715 is significantly better than
that of the integrating ADCs.
The on-chip PGA allows the AD7715 to handle an analog input
voltage range as low as 10 mV full-scale with VREF = 1.25 V. The
differential inputs of the part allow this analog input range to
have an absolute value anywhere between AGND and AVDD
when the part is operated in unbuffered mode. It allows the user
to connect the transducer directly to the input of the AD7715.
The programmable gain front end on the AD7715 allows the
part to handle unipolar analog input ranges from 0 mV to
20 mV to 0 V to 2.5 V and bipolar inputs of ±20 mV to
±2.5 V. Because the part operates from a single supply, these
bipolar ranges are with respect to a biased-up differential input.
PRESSURE MEASUREMENT
One typical application of the AD7715 is pressure measurement.
Figure 14 shows the AD7715 used with a pressure transducer,
the BP01 from Sensym. The pressure transducer is arranged in
a bridge network and gives a differential output voltage between
its OUT(+) and OUT() terminals. With rated full-scale pressure
(in this case 300 mmHg) on the transducer, the differential
output voltage is 3 mV/V of the input voltage (that is, the
voltage between its IN(+) and IN() terminals).
Assuming a 5 V excitation voltage, the full-scale output range
from the transducer is 15 mV. The excitation voltage for the
bridge is also used to generate the reference voltage for the
AD7715. Therefore, variations in the excitation voltage do not
introduce errors in the system. Choosing resistor values of 24 kΩ
and 15 kΩ as per the diagram give a 1.92 V reference voltage for
the AD7715 when the excitation voltage is 5 V.
Using the part with a programmed gain of 128 results in the
full-scale input span of the AD7715 being 15 mV which
corresponds with the output span from the transducer.
IN(–)
OUT(+)
IN(+)
OUT(–)
AUTO-ZEROED
Σ-
MODULATOR
CHARGE BALANCING ADC
DIGITAL
FILTER
AVDD
SERIAL INTERFACE
REGISTER BANK
MCLK IN
MCLK OUT
REF IN(+)
REF IN(–)
AGND
DGND
DOUT
DIN
CS
SCLK
DRDY
RESET
24k
15k
DVDD
AD7715
+5V
EXCITATION VOLTAGE = +5V
AIN(+)
AIN(–)
A = 1 TO 128
PGA
BUFFER
CLOCK
GENERATION
08
51
9-
01
4
Figure 14. Pressure Measurement Using the AD7715
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7715ARUZ-5REEL71 | 制造商:AD 制造商全称:Analog Devices 功能描述:3 V/5 V, 450 ??A 16-Bit, Sigma-Delta ADC |
| AD7715ARZ-3 | 功能描述:IC ADC 16BIT 3V 16-SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率（每秒）:20M 数据接口:并联 转换器数目:2 功率耗散（最大）:155mW 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-TQFP 供应商设备封装:48-TQFP（7x7） 包装:Digi-Reel® 输入数目和类型:4 个单端，单极；2 个差分，单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6 |
| AD7715ARZ-31 | 制造商:AD 制造商全称:Analog Devices 功能描述:3 V/5 V, 450 ??A 16-Bit, Sigma-Delta ADC |
| AD7715ARZ-3REEL | 功能描述:IC ADC 16BIT SIGMA-DELTA 16SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD7715ARZ-3REEL1 | 制造商:AD 制造商全称:Analog Devices 功能描述:3 V/5 V, 450 ??A 16-Bit, Sigma-Delta ADC |
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