AD7799BRUZ - 24-Bit Sigma-Delta ADC with In-Amp | Analog Devices
MPN: AD7799BRUZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.42 | $8.42 |
| 10 | $7.75 | $77.50 |
| 100 | $6.41 | $641.00 |
| 500 | $5.83 | $2,915.00 |
| 1,000 | $5.24 | $5,240.00 |
Drop-in alternatives for AD7799BRUZ β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
AD7799BRUZ-REEL
β Drop-Inπ Reference alternative (not in catalog)
AD7798BRUZ
β Drop-Inβ In Stock
$4.5 / Unit
View Datasheet βAD7799BRUZ-REEL7
β Drop-Inπ Reference alternative (not in catalog)
AD7799BRUZ-RL
β Drop-Inπ Reference alternative (not in catalog)
AD7799BRUZ-REEL
β Drop-Inπ Reference alternative (not in catalog)
AD7799BRUZ-REEL7
β Drop-Inπ Reference alternative (not in catalog)
AD7799BRUZ-RL
β Drop-Inπ Reference alternative (not in catalog)
AD7799BRUZ-REEL
β Drop-Inπ Reference alternative (not in catalog)
AD7799BRUZ Maximum Ratings & Electrical Characteristics
| Resolution | 24 Bit |
| Number of Inputs | 3 Differential |
| Input Type | Differential |
| Data Interface | SPI |
| Architecture | Sigma-Delta |
| Output Data Rate | 4.17 Hz to 470 Hz |
| Supply Voltage | 2.7 V to 5.25 V |
| Power Consumption | 500 Β΅A typical |
| On-Chip PGA Gain | 1, 2, 4, 8, 16, 32, 64, 128 |
| Noise | 40 nV/βHz |
| Reference Type | External, Internal |
| Operating Temperature | -40Β°C to +105Β°C |
| Package | 16-TSSOP |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
AD7799BRUZ Pin Configuration
| Pin 1 | SCLK β Serial clock input for SPI interface |
| Pin 2 | DIN β Serial data input for SPI interface |
| Pin 3 | DOUT/RDY β Serial data output / data ready indicator |
| Pin 4 | CS β Chip select input, active low |
| Pin 5 | GND β Ground |
| Pin 6 | AVDD β Analog power supply |
| Pin 7 | AIN1(+) β Positive analog input 1 |
| Pin 8 | AIN1(-) β Negative analog input 1 |
| Pin 9 | AIN2(+) β Positive analog input 2 |
| Pin 10 | AIN2(-) β Negative analog input 2 |
| Pin 11 | AIN3(+) β Positive analog input 3 |
| Pin 12 | AIN3(-) β Negative analog input 3 |
| Pin 13 | REFIN(+) β Positive reference input |
| Pin 14 | REFIN(-) β Negative reference input |
| Pin 15 | DVDD β Digital power supply |
| Pin 16 | PWRDWN β Power down input, active low |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD7799BRUZ is suitable for 6 applications: Weigh Scales, Temperature Measurement, Pressure Sensors, Portable Instrumentation, Industrial Process Control, Medical Monitoring.
Weigh Scales
The AD7799BRUZ is ideal for weigh scale applications due to its 24-bit resolution and low noise. The on-chip PGA with gains up to 128 allows direct connection to load cells, which typically output only a few millivolts. The low power consumption of 500 Β΅A is beneficial for battery-powered scales. The device's Sigma-Delta architecture provides excellent noise rejection, ensuring accurate weight measurements even in noisy industrial environments. The SPI interface simplifies data transfer to a microcontroller for display and processing.
Recommended
Temperature Measurement
The AD7799BRUZ is well-suited for temperature measurement with RTDs and thermocouples. Its low noise and programmable gain allow direct connection to these sensors, which produce small voltage changes. The on-chip in-amp simplifies signal conditioning, and the internal reference provides a stable voltage for ratiometric measurements. The device's wide supply voltage range and low power consumption make it suitable for portable temperature loggers. The SPI interface allows easy integration with microcontrollers for data logging and control.
Recommended
Pressure Sensors
The AD7799BRUZ is ideal for pressure sensor applications, such as industrial process control and automotive systems. Its 24-bit resolution and low noise ensure accurate pressure readings from bridge-type sensors. The on-chip PGA allows direct connection to the sensor output, eliminating the need for external amplification. The device's low power consumption is advantageous for battery-powered wireless pressure monitors. The SPI interface enables easy configuration and data readout, and the wide operating temperature range makes it suitable for harsh environments.
Recommended
Portable Instrumentation
The AD7799BRUZ is perfect for portable instrumentation due to its low power consumption of 500 Β΅A and small TSSOP-16 package. It can be used in handheld multimeters, data loggers, and field analyzers. The device's wide supply voltage range allows operation from a single lithium-ion cell. The on-chip reference and PGA reduce external component count, saving board space. The SPI interface allows efficient communication with low-power microcontrollers, extending battery life in portable devices.
Recommended
Industrial Process Control
The AD7799BRUZ is well-suited for industrial process control systems, such as PLCs and distributed control systems. Its high resolution and low noise ensure accurate monitoring of process variables like temperature, pressure, and flow. The device's on-chip PGA and reference simplify sensor interfacing, and the SPI interface allows easy integration with industrial microcontrollers. The wide operating temperature range of -40Β°C to +105Β°C makes it suitable for harsh factory environments. The low power consumption is beneficial for loop-powered transmitters.
Recommended
Medical Monitoring
The AD7799BRUZ is suitable for medical monitoring devices, such as patient monitors and diagnostic equipment. Its low noise and high resolution are essential for accurate measurement of physiological signals like ECG and temperature. The device's low power consumption is critical for battery-powered wearable monitors. The on-chip PGA allows direct connection to sensors, and the SPI interface enables data transfer to a medical-grade microcontroller. The small TSSOP package is ideal for compact medical devices.
Recommended
Recommended Products Summary
Engineering reference data for AD7799BRUZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7799BRUZ-REEL | AD7798BRUZ | AD7799BRUZ-REEL7 |
|---|---|---|---|---|
| Package | 16-TSSOP | 16-TSSOP | 16-TSSOP | 16-TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 24 Bit | 24 Bit | 16 Bit | 24 Bit |
| Number of Inputs | 3 Differential | 3 Differential | 3 Differential | 3 Differential |
| Output Data Rate | 4.17 Hz to 470 Hz | 4.17 Hz to 470 Hz | 4.17 Hz to 470 Hz | 4.17 Hz to 470 Hz |
| Supply Voltage | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V |
| Power Consumption | 500 Β΅A | 500 Β΅A | 500 Β΅A | 500 Β΅A |
| On-Chip PGA | Yes | Yes | Yes | Yes |
Key Differentiators
- 24-bit resolution with on-chip in-amp (vs AD7798BRUZ)
- Low power consumption of 500 Β΅A (vs AD7798BRUZ)
- On-chip PGA with gains up to 128 (vs AD7798BRUZ)
Design Notes
Decouple the AVDD and DVDD pins with 0.1 Β΅F and 10 Β΅F capacitors placed as close to the pins as possible. Use separate analog and digital ground planes to minimize noise coupling. The AD7799BRUZ operates from 2.7V to 5.25V, so ensure the supply is clean and stable for optimal performance.
Place the reference decoupling capacitor close to the REFIN pins. Use a low-ESR ceramic capacitor, such as 10 Β΅F, to ensure a stable reference voltage. For best noise performance, keep the analog input traces short and shielded from digital signals.
Avoid exceeding the common-mode input range of the PGA. The input voltage should be within the supply rails. Also, ensure the SPI interface is not subjected to excessive noise, as this can corrupt the digital data. Use pull-up resistors on the CS and SCLK lines if necessary.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
