AD7796BRUZ - 16-Bit Sigma-Delta ADC for Bridge Sensors | Analog Devices
MPN: AD7796BRUZ ⚠ Last Time Buy| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.35 | $4.35 |
| 10 | $3.92 | $39.20 |
| 100 | $3.49 | $349.00 |
| 500 | $3.14 | $1,570.00 |
| 1,000 | $2.83 | $2,830.00 |
Drop-in alternatives for AD7796BRUZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7797BRUZ
✅ Drop-In✓ In Stock
$3.3 / Unit
View Datasheet →AD7796BRUZ-REEL
✅ Drop-In📋 Reference alternative (not in catalog)
AD7798BRUZ
✅ Drop-In✓ In Stock
$4.5 / Unit
View Datasheet →AD7799BRUZ
✅ Drop-In✓ In Stock
$5.24 / Unit
View Datasheet →AD7796BRUZ Maximum Ratings & Electrical Characteristics
| Resolution | 16 Bit |
| Number of Inputs | 1 |
| Input Type | Differential |
| Architecture | Sigma-Delta |
| Data Interface | SPI |
| Sampling Rate | 470 SPS |
| Gain | 128 (fixed) |
| Supply Voltage | 2.7 V to 5.25 V |
| Power Consumption | 1.5 mA (typical) |
| Operating Temperature Range | -40°C to +105°C |
| Package | 16-TSSOP |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Reference Type | Internal |
| Number of Channels | 1 |
AD7796BRUZ Pin Configuration
| Pin 1 | SCLK — Serial clock input for SPI interface |
| Pin 2 | DIN — Serial data input for SPI interface |
| Pin 3 | DOUT — Serial data output for SPI interface |
| Pin 4 | CS — Chip select input, active low |
| Pin 5 | GND — Ground |
| Pin 6 | AVDD — Analog power supply |
| Pin 7 | AIN+ — Positive analog input |
| Pin 8 | AIN- — Negative analog input |
| Pin 9 | REF+ — Positive reference input |
| Pin 10 | REF- — Negative reference input |
| Pin 11 | DVDD — Digital power supply |
| Pin 12 | DOUT/RDY — Data output / ready indicator |
| Pin 13 | SCLK — Serial clock (duplicate for some packages) |
| Pin 14 | DIN — Serial data input (duplicate for some packages) |
| Pin 15 | CS — Chip select (duplicate for some packages) |
| Pin 16 | GND — Ground (duplicate for some packages) |
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
AD7796BRUZ is suitable for 6 applications: Weigh Scales, Strain Gauge Measurement, Pressure Sensors, Industrial Process Control, Medical Instrumentation, Portable Instrumentation.
Weigh Scales
The AD7796BRUZ is ideal for weigh scale applications due to its 16-bit resolution and fixed gain of 128, which allows direct connection to load cells. The sigma-delta architecture ensures high accuracy and low noise, critical for precise weight measurements. The device's low power consumption makes it suitable for battery-operated scales, and its SPI interface simplifies integration with microcontrollers. The on-chip temperature sensor can be used for temperature compensation, improving overall accuracy.
Recommended
Strain Gauge Measurement
In strain gauge applications, the AD7796BRUZ's high gain of 128 amplifies the small voltage changes from the gauge, eliminating the need for external amplifiers. The differential input rejects common-mode noise, ensuring accurate readings. The device's low noise performance is essential for detecting minute strain variations. Its SPI interface allows easy data transfer to a host processor for analysis. The wide supply voltage range supports various system power rails.
Recommended
Pressure Sensors
The AD7796BRUZ is well-suited for pressure sensor interfaces, where it converts the analog output of a bridge-type pressure sensor into a digital signal. Its fixed gain of 128 matches the typical output range of such sensors, and the sigma-delta ADC provides high resolution for accurate pressure readings. The low power consumption is beneficial for portable pressure monitors. The device's small TSSOP package fits compact sensor modules.
Recommended
Industrial Process Control
In industrial process control, the AD7796BRUZ provides accurate conversion of sensor signals from bridges, such as those used in flow meters and level transmitters. Its high resolution and low noise ensure reliable data for control loops. The device operates over a wide temperature range, making it suitable for harsh industrial environments. The SPI interface allows easy connection to PLCs or microcontrollers. The internal reference simplifies design.
Recommended
Medical Instrumentation
The AD7796BRUZ is used in medical devices such as patient scales and infusion pumps, where precision and low power are critical. Its 16-bit resolution provides accurate measurements, and the low power consumption extends battery life in portable devices. The device's small footprint is ideal for compact medical equipment. The on-chip temperature sensor can monitor system temperature for safety. The SPI interface enables seamless integration with medical-grade microcontrollers.
Recommended
Portable Instrumentation
For portable instrumentation, the AD7796BRUZ offers a balance of performance and power efficiency. Its low supply current of 1.5 mA is ideal for battery-powered devices. The device's high gain and resolution allow accurate sensor measurements without external amplification. The compact TSSOP package saves board space. The SPI interface supports low-power microcontrollers. The wide supply voltage range accommodates various battery chemistries.
Recommended
Engineering reference data for AD7796BRUZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7797BRUZ | AD7796BRUZ-REEL | AD7798BRUZ |
|---|---|---|---|---|
| Package | 16-TSSOP | 16-TSSOP | 16-TSSOP | 16-TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 Bit | 24 Bit | 16 Bit | 16 Bit |
| Gain | 128 (fixed) | 128 (fixed) | 128 (fixed) | 1 to 128 (programmable) |
| Supply Voltage | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V |
| Data Rate | 470 SPS | 470 SPS | 470 SPS | 470 SPS |
| Interface | SPI | SPI | SPI | SPI |
| Power Consumption | 1.5 mA | 1.5 mA | 1.5 mA | 1.5 mA |
Key Differentiators
- Fixed gain of 128 eliminates external amplifier (vs MCP3421)
- 16-bit resolution with sigma-delta architecture (vs MCP3421)
- Low power consumption of 1.5 mA (vs AD7797BRUZ)
Design Notes
Ensure that the AVDD and DVDD supplies are properly decoupled with 0.1uF and 10uF capacitors placed close to the pins. The AD7796BRUZ operates from 2.7V to 5.25V, and a clean supply is essential for optimal ADC performance. Use separate analog and digital grounds to minimize noise coupling.
For best performance, place the AD7796BRUZ on a PCB with a solid ground plane. Keep the analog input traces short and shielded from digital signals. The reference inputs should be connected to a low-impedance, low-noise reference source. Avoid routing SPI lines near the analog inputs to prevent crosstalk.
Do not exceed the absolute maximum ratings for supply voltage or input voltage. The fixed gain of 128 means that the input signal must not exceed the reference voltage divided by the gain, otherwise the ADC will saturate. Ensure that the SPI communication is properly configured with correct clock polarity and phase to avoid data corruption.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Other compliance data not specified in the provided sources.
