Overview
The AD7730BR-REEL7, produced by Analog Devices Inc., is a comprehensive analog front end (AFE) designed specifically for weigh-scale and pressure measurement applications. This device is a 24-bit Sigma-Delta analog-to-digital converter (ADC) that accepts low-level signals directly from transducers and outputs a serial digital word. It features a programmable gain front end, on-chip DAC for offset and tare removal, and supports both AC and DC excitation. The AD7730 is known for its high accuracy and low power consumption, making it an ideal choice for various industrial and medical applications.
Key Specifications
| Parameter | Value | Conditions/Comments |
|---|---|---|
| Bits | 24 | |
| Number of Channels | 2 | |
| Data Output Interface | Serial SPI | |
| Device Architecture | Sigma-Delta | |
| Input Type | Differential, Single-Ended | |
| Operating Temperature Range | -40°C to 85°C | |
| Power (typ) | 65 mW | |
| Sample Rate (max) | 1.2 kSPS | |
| Vin Range (typ) | 0.16 V p-p | |
| Vref Source | External | |
| Supply Voltage | 2.7 V to 5.25 V |
Key Features
- Programmable gain front end with multiple gain settings (e.g., 250, 125, 62.5, 31.25)
- On-chip DAC for offset and tare removal
- Support for both AC and DC excitation
- FASTStep mode for fast step response
- Single supply operation
- Low power consumption with a standby mode reducing power to 5 μA
- Programmable digital filter
- SPI serial interface for data output
Applications
- Weigh scales
- Pressure measurement
- Load cell applications
- Industrial automation
- Medical devices requiring precise analog-to-digital conversion
Q & A
- What is the primary function of the AD7730BR-REEL7? The AD7730BR-REEL7 is a 24-bit Sigma-Delta analog-to-digital converter designed for weigh-scale and pressure measurement applications.
- How many channels does the AD7730BR-REEL7 support? The AD7730BR-REEL7 supports 2 channels.
- What is the data output interface of the AD7730BR-REEL7? The data output interface is Serial SPI.
- What is the operating temperature range of the AD7730BR-REEL7? The operating temperature range is -40°C to 85°C.
- What is the typical power consumption of the AD7730BR-REEL7? The typical power consumption is 65 mW.
- What is the maximum sample rate of the AD7730BR-REEL7? The maximum sample rate is 1.2 kSPS.
- Does the AD7730BR-REEL7 support both AC and DC excitation? Yes, it supports both AC and DC excitation.
- What is the purpose of the on-chip DAC in the AD7730BR-REEL7? The on-chip DAC is used for offset and tare removal.
- What is the standby power consumption of the AD7730BR-REEL7? The standby power consumption is reduced to 5 μA.
- What type of digital filter does the AD7730BR-REEL7 have? The AD7730BR-REEL7 has a programmable digital filter.
