content here.
content here.


Selection Tables

Sigma Delta ADCs (< 15 kSPS)
Last Updated: 2/2009

Analog Devices has a wide range of low bandwidth, high resolution, Σ-Δ ADCs. Along with the ADC, these devices contain current sources, a multiplexer, a PGA and analog input buffers on board. This Selection Guide identifies some of the applications in which the ADCs are used as well as identifying the most suitable ADCs for each application.
(Please see the notes below the Selection Table.)

New Parts:
AD7190: 4.8 kHz Ultra-Low Noise 24-Bit Sigma-Delta ADC with PGA
AD7780: 24-Bit Pin Programmable Low Power Σ-Δ ADC

Generic Part # No. of Bits p-p res. @ Max. Range(Bits) @ Data Rate(Hz) AIN Chan. Onchip PGA Onchip
AIN Buffer		 Onchip
Curr
Source		 AVDD/
DVDD
(V)		 Power
Supply
Current
(mA)		 Price
$/1K		 Comments
AD7190 24 20.5 50 4 Yes Yes   AVDD:5
DVDD:3/5		 6 5.9  
AD7701 16 16 4000 1       5 5 15.70 10Hz Bandwidth
AD7703 20 17 4000 1       5 5 13.26 10Hz Bandwidth
AD7705 16 16 60 2 Yes Yes   3/5 0.3 4.12  
AD7706 16 16 60 3 Yes Yes   3/5 0.3 4.12  
AD7707 16 16 60 3 Yes Yes   3/5 0.28 4.46  
AD7708 16 16 20 10 Yes Yes   3/5 1.28 3.98  
AD7709 16 16 20 4 Yes Yes Yes 3/5 1.25 3.89  
AD7710 24 17.5 60 2 Yes     5 5 14.45  
AD7711 24 17.5 60 2 Yes   Yes 5 5 15.30 Two Current.
Sources
AD7711A 24 17.5 60 2 Yes   Yes 5 5 15.30 One Current.
Source
AD7712 24 17.5 60 2 Yes     5 5 13.20  
AD7713 24 16 20 3 Yes   Yes 5 0.7 16.15  
AD7714 24 17.5 60 5 Yes Yes   3/5 0.35 8.28  
AD7715 16 16 60 1 Yes Yes   3/5 0.35 5.65  
AD7718 24 18.5 20 10 Yes Yes   3/5 1.28 5.24  
AD7719 24 18.5 20 5 Yes Yes Yes 3/5 1.5 8.76 Dual ADC
AD7730 24 17 200 2 Yes Yes   AVDD:5
DVDD:
3/5		 13 9.86 Weighscale
AD7730L 24 17 200 2 Yes Yes   AVDD:5
DVDD:
3/5		 13 8.12 Weighscale
AD7731 24 17 800 5 Yes Yes   AVDD:5
DVDD:
3/5		 13.5 9.86  
AD7732 24 16 2000 2 Yes Yes   AVDD:5
DVDD:
3/5		 18 8.50 Fast Channel Switching
AD7734 24 16 2000 4 Yes Yes   AVDD:5
DVDD:
3/5		 18 8.50 Fast Channel Switching
AD7738 24 16 8500 8 Yes Yes   AVDD:5
DVDD:
3/5		 18 7.77 Fast Channel Switching
AD7739 24 16 4000 8 Yes Yes   AVDD:5
DVDD:
3/5		 14 7.65 Fast Channel Switching
AD7780 24 20 16.7 1 Yes Yes   3/5 0.38 2.7 Pin-Programmable
AD7782 24 18.5 20 2 Yes Yes   3/5 1.3 4.25 Read-Only
AD7783 24 18.5 20 1   Yes Yes 3/5 1.3 4.25 Read-Only
AD7785 20 19 16.6 3 Yes Yes Yes 3/5 0.40 4.20 On-Chip Reference
AD7787 24 19 16.6 2   Yes   3/5 0.13 3.80 Low Power
AD7788 16 16 16.6         3/5 0.065 1.99 Low Power
AD7789 24 19 16.6 1       3/5 0.065 2.95 Low Power
AD7790 16 16 16.6 1   Yes   3/5 0.13 2.96 Low Power
AD7791 24 19 16.6 1   Yes   3/5 0.13 3.83 Low Power
AD7792 16 16 16.6 3 Yes Yes Yes 3/5 0.40 3.99 On-Chip Reference
AD7793 24 19 16.6 3 Yes Yes Yes 3/5 0.40 5.10 On-Chip Reference
AD7794 24 19 16.6 6 Yes Yes Yes 3/5 0.40 5.80 High Channel Count
AD7795 16 16 16.6 6 Yes Yes Yes 3/5 0.40 4.40 High Channel Count
AD7796 16 15.5 16.6 1 Yes Yes   3/5 0.25 2.75 Weight/Pressure
AD7797 24 15.5 16.6 1 Yes Yes   3/5 0.25 3.35 Weight/Pressure
AD7798 16 16 16.6 3 Yes Yes   3/5 0.30 3.80 Weight/Pressure
AD7799 24 19 16.6 3 Yes Yes   3/5 0.40 4.35 Weight/Pressure


Summary of Low Bandwidth Sigma Delta ADC Information

1. Number of Bits
16-Bit: AD7705, AD7706, AD7707, AD7708, AD7709, AD7715, AD7785, AD7788, AD7790, AD7792, AD7795, AD7796, AD7798
20-Bit: AD7785
24-Bit: AD7710, AD7711, AD7711A, AD7712, AD7713, AD7714, AD7718, AD7719, AD7730, AD7730L, AD7731, AD7732, AD7734, AD7738, AD7739, AD7782, AD7783, AD7787, AD7789, AD7791, AD7793, AD7794, AD7797, AD7799
2. Multi-Channel Applications
High Throughput: AD7731, AD7734, AD7738, AD7739
Low Throughput: AD7708, AD7718, AD7714, AD7794, AD7795
3. Temperature Measurements
For thermal diode and RTD applications, current sources are required.
Thermocouple: AD7714, AD7719, AD7785, AD7792, AD7793, AD7794, AD7795
Thermal Diode: AD7709
RTD: AD7711, AD7719, AD7783, AD7785, AD7792, AD7793, AD7794
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, AD7798, AD7799
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, AD7796, AD7797, AD7798, AD7799
6. Low Power
AD7787, AD7788, AD7789, AD7790, AD7791, AD7705, AD7706, AD7714, AD7715, AD7719, AD7785, AD7792, AD7793, AD7794, AD7795, AD7796, AD7797, AD7798, AD7799
7. High Analog Input Voltages (+10 V)
AD7732, AD7734, AD7712, AD7707
8. Rail-to-Rail On-Chip Buffers
AD7719, AD7708, AD7718, AD7782, AD7783, AD7709, AD7787, AD7790, AD7791
9. Bipolar Inputs (+2.5 V)
AD7710, AD7711, AD7712
10. Pin Configurable
AD7782, AD7783