AD7731BRZ Electronic IC Chips , 24- Bit Sigma Delta ADC inside ic chip
electronic integrated circuit
,linear integrated circuits
Low Noise, High Throughput 24-Bit Sigma-Delta ADC
FEATURES
24-Bit Sigma-Delta ADC
16 Bits p-p Resolution at 800 Hz Output Rate
Programmable Output Rates up to 6.4 kHz
Programmable Gain Front End 60.0015% Nonlinearity
Buffered Differential Inputs Programmable
Filter Cutoffs FASTStep™* Mode for Channel
Sequencing Single Supply Operation
APPLICATIONS
Process Control
PLCs/DCS Industrial
Instrumentation
GENERAL DESCRIPTION
The AD7731 is a complete analog front-end for process control applications. The device has a proprietary programmable gain front end that allows it to accept a range of input signal ranges, including low level signals, directly from a transducer. The sigmadelta architecture of the part consists of an analog modulator and a low pass programmable digital filter, allowing adjustment of filter cutoff, output rate and settling time.
The part features three buffered differential programmable gain analog inputs (which can be configured as five pseudo-differential inputs), as well as a differential reference input. The part operates from a single +5 V supply and accepts seven unipolar analog input ranges: 0 to +20 mV, +40 mV, +80 mV, +160 mV, +320 mV, +640 mV and +1.28 V, and seven bipolar ranges: ±20 mV, ±40 mV, ±80 mV, ±160 mV, ±320 mV, ±640 mV and ±1.28 V. The peak-to-peak resolution achievable directly from the part is 16 bits at an 800 Hz output rate. The part can switch between channels with 1 ms settling time and maintain a performance level of 13 bits of peak-to-peak resolution.
The serial interface on the part can be configured for three-wire operation and is compatible with microcontrollers and digital signal processors. The AD7731 contains self-calibration and system calibration options and features an offset drift of less than 5 nV/°C and a gain drift of less than 2 ppm/°C.
STOCK LIST
| LA7838 | 5192 | SANYO | 15+ | SIP |
| MC68000P8 | 3610 | MOT | 15+ | DIP |
| L6283-1.3 | 2938 | ST | 14+ | QFP |
| MRF182 | 6386 | MOTOROLA | 14+ | SMD |
| MAX17435ETG | 6850 | MAXIM | 14+ | QFN |
| FOD817C | 2200 | FSC | 16+ | SOP-4 |
| AME8500AEETAF29Z | 1600 | AME | 13+ | SOT-23 |
| IRF3710 | 1500 | IR | 14+ | TO-220 |
| MIC2075-1YM | 6382 | MICREL | 16+ | SOP |
| MRF160 | 637 | MOT | 15+ | MODEL |
| BLW33 | 156 | PHI | 15+ | SOT122A |
| BLW32 | 156 | PHI | 14+ | SOT122A |
| MIC39102YM | 6490 | MICREL | 16+ | SOP-8 |
| AT28C64B-15SI | 2300 | ATMEL | 16+ | SOP28 |
| MAX811MEUS-T | 8041 | MAXIM | 16+ | SOT |
| 74LVC244AD | 7500 | 16+ | SOP | |
| DS1722S+T | 5760 | MAXIM | 14+ | SOP-8 |
| BT136-600E | 2100 | 15+ | TO-220 | |
| PM75CFE060 | 280 | MITSUBISH | 13+ | MOUDLE |
| BT137S-800G | 10000 | 15+ | TO220 | |
| MR4020 | 6260 | SHINDENGE | 14+ | TO220-7 |
| IRFL9110TR | 1500 | IR | 16+ | SOT-223 |
| LM317LIPK | 9368 | TI | 15+ | SOT-89 |
| MJE13005 | 38000 | FSC | 16+ | TO-220 |
| FCX605TA | 1950 | ZETEX | 15+ | SOT-89 |
| 2SC2878A | 3000 | TOSHIBA | 13+ | TO-92 |
| 2SA1220A | 3000 | NEC | 13+ | TO-126 |
| MIC811LUY | 10000 | MICREL | 16+ | SOT-143 |
| BD9778F-E2 | 5500 | ROHM | 16+ | SOP-8 |
| PIC18F25K20-I/ML | 4553 | MICROCHIP | 14+ | QFN |
| 74LVXC3245MTCX | 7500 | FAIRCHILD | 15+ | TSSOP |
| 2SC3964 | 3000 | TOSHIBA | 16+ | TO-126 |
| 2SD1408Y | 3000 | TOSHIBA | 16+ | TO-220F |
0402 0.063W 10kOhm SMT Thick Film Chip Resistor RC0402JR-0710KL
200MHz MPZ1608S300ATAH0 Chip Beads 5A For Power Line TDK SMD0603
22R 5% SMD0402 Film Chip Resistors ERJ-2GEJ220X PANASONIC
MOV-20D751K 750V 6.5kA Varistor blue SMD Chip Resistor 1 Circuit Through Hole Disc 20mm
2SB1261-TP 10W General Purpose Rectifier Diode Silicon Epitaxial Planar Pnp Transistor
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PMEG6010ER 1A Low VF MEGA Schottky Barrier Rectifier SOD123
SK34SMA 3A SMD Schottky Barrier Rectifier Diodes DO - 214AC
SMBJ5.0A Silicon Avalanche Diodes 600W Surface Mount TVS Diodes
| Image | Part # | Description | |
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0402 0.063W 10kOhm SMT Thick Film Chip Resistor RC0402JR-0710KL |
10 kOhms ±5% 0.063W, 1/16W Chip Resistor 0402 (1005 Metric) Moisture Resistant Thick Film
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200MHz MPZ1608S300ATAH0 Chip Beads 5A For Power Line TDK SMD0603 |
30 Ohms 1 Power Line Ferrite Bead 0603 (1608 Metric) 5A 10mOhm
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22R 5% SMD0402 Film Chip Resistors ERJ-2GEJ220X PANASONIC |
22 Ohms ±5% 0.1W, 1/10W Chip Resistor 0402 (1005 Metric) Automotive AEC-Q200 Thick Film
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MOV-20D751K 750V 6.5kA Varistor blue SMD Chip Resistor 1 Circuit Through Hole Disc 20mm |
750 V 6.5 kA Varistor 1 Circuit Through Hole Disc 20mm
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2SB1261-TP 10W General Purpose Rectifier Diode Silicon Epitaxial Planar Pnp Transistor |
Bipolar (BJT) Transistor PNP 60 V 3 A 50MHz 1 W Surface Mount D-Pak
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IXFK140N30P Polar Power Mosfet Hiperfet TO264 300V 140A |
N-Channel 300 V 140A (Tc) 1040W (Tc) Through Hole TO-264AA (IXFK)
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DF2B29FU,H3F TVS 24VWM 47V ESD Protection Diodes |
47V Clamp 3A (8/20µs) Ipp Tvs Diode Surface Mount USC
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PMEG6010ER 1A Low VF MEGA Schottky Barrier Rectifier SOD123 |
Diode 60 V 1A Surface Mount SOD-123W
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SK34SMA 3A SMD Schottky Barrier Rectifier Diodes DO - 214AC |
Diode 40 V 3A Surface Mount DO-214AC, SMA
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SMBJ5.0A Silicon Avalanche Diodes 600W Surface Mount TVS Diodes |
9.2V Clamp 65.3A Ipp Tvs Diode Surface Mount DO-214AA (SMBJ)
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