AD7714YR-REEL7 [ADI]
CMOS, 3V/5V, 500 µA, 24-Bit Sigma-Delta, Signal Conditioning ADC;
| 型号： | AD7714YR-REEL7 |
| 厂家： | 
ADI |
| 描述： | CMOS, 3V/5V, 500 µA, 24-Bit Sigma-Delta, Signal Conditioning ADC 光电二极管 转换器 |
| 文件： | 总2页 (文件大小：137K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Industrial Converter Technical Note - ICV001
a
Selecting a Low Bandwidth Σ−∆ ADC
Introduction
Analog Devices has a wide range of low bandwidth, high resolution, Σ−∆ ADCs. Along with the ADC, these
devices contain current sources, a multiplexer, a PGA and analog input buffers on board. This Technical Note
identifies some of the applications in which the ADCs are used as well as identifying the most suitable ADCs for
each application.
1) Number of Bits
16-Bit: AD7705/6, AD7707, AD7708, AD7709, AD7715
24-Bit: AD7710, AD7711, AD7712, AD7713, AD7714, AD7718,
AD7719, AD7730, AD7731, AD7732, AD7734, AD7738
2) Multi-Channel Applications
High Throughput: AD7731, AD7734, AD7738
Low Throughput: AD7708, AD7718, AD7714
3) Temperature Measurements
For thermal diode and RTD applications, current sources are required.
Thermocouple: AD7714, AD7719
Thermal Diode: AD7709
RTD: AD7711, AD7719, AD7783
4) Pressure
Requirements: Low level differential analog inputs with a high level differential reference input for ratiometric
operation. Optional features include an auxiliary ADC which can be used for temperature compensation.
AD7719, AD7714, AD7730, AD7710
5) Weighscale
Requirements: Low level differential analog inputs with a high level differential reference input for ratiometric
operation. Optional features include an auxiliary ADC which can be used for temperature compensation, fast-
step, AC excitation, a reference detect circuit and increased filter rejection in the out-of-band region.
AD7730, AD7730L, AD7719, AD7714
6) Low Power
AD7705/6, AD7714, AD7715, AD7719
7) High Analog Input Voltages (+10 V)
AD7732, AD7734, AD7712, AD7707
8) Rail-to-Rail On-Chip Buffers
AD7719, AD7708/18, AD7782, AD7783, AD7709
9) Bipolar Inputs (+2.5 V)
AD7710, AD7711, AD7712
10) Pin Configurable
AD7782, AD7783
Industrial Converter Tech Note – ICVXXX
Ver A.1 02/02
- 1 -
www.analog.com/sigma-delta
Industrial Converter Technical Note - ICV001
a
Selecting a Low Bandwidth Σ−∆ ADC
Summary of Low Bandwidth Sigma Delta ADCs.
MODEL No. Min.
Max. p-p res.
Onchip Onchip Power
of Input Input @ Max. @ Data AIN
AIN
Curr. Supply Price
Comments
Bits Range Range Range Rate Chan. Buffer Source Current
(V)
(V)
(Bits)
(Hz)
(mA) $/1K
AD7701
AD7703
AD7705
AD7706
AD7707
AD7708
AD7709
AD7710
AD7711
16
20
16
16
16
16
16
24
24
2.5
2.5
16
4000*
1
1
5
15.70
13.26
4.12
2.5
2.5
2.5
2.5
10
17
16
4000*
60
5
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
2
Y
Y
Y
Y
Y
0.3
0.3
0.28
1.28
1.25
5
16
60
3
4.12
16
60
3
4.46
2.56
2.56
2.5
2.5
2.5
2.5
2.5
2.5
16
20
10
4
3.98
16
20
Y
3.89
17.5
17.5
17.5
17.5
16
60
2
14.45
60
2
Y
Y
5
15.30 Two Curr. Sources
15.30 One Curr. Source
13.20
AD7711A 24
60
2
5
AD7712
AD7713
AD7714
24
24
24
60
2
5
20
3
Y
0.7
0.35
16.15
17.5
60
5
Y
Y
8.28
5.65
AD7715
16
0.02
2.5
16
60
1
0.35
AD7718
AD7719
AD7730
24
24
24
0.02
0.02
0.01
0.01
0.02
5
2.56
2.56
0.08
0.08
1.28
10
18.5
18.5
17
20
20
10
5
2
2
5
2
4
8
2
1
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
1.28
1.5
13
5.24
Y
8.76 Dual ADC
11.60 Weighscale
9.55 Weighscale
9.86
200
200
800
2000
2000
6800
20
AD7730L 24
17
13
AD7731
AD7732
AD7734
AD7738
AD7782
AD7783
24
24
24
17
13.5
18
16
7.77 Fast Ch. switching
7.77 Fast Ch. switching
6.89 Fast Ch. switching
5.10 Read-Only
5.10 Read-Only
5
10
16
18
24 0.625
2.5
16
18
24
0.16
2.56
18.5
1.3
1.3
24
0.16
2.56
18.5
20
Y
*While the update rate equals 4 kHz, the bandwidth is 10 Hz.
Industrial Converter Tech Note – ICVXXX
www.analog.com/sigma-delta
Ver A.1 02/02
- 2 -
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