Overview
The AD7730BRUZ, produced by Analog Devices Inc., is a comprehensive analog front end (AFE) designed specifically for weigh-scale and pressure measurement applications. This device is capable of accepting low-level signals directly from transducers and converting them into a serial digital output. It features a proprietary programmable gain front end based on an analog modulator, which is processed by a low-pass programmable digital filter. This allows for adjustments in filter cutoff, output rate, and settling time. The AD7730BRUZ operates from a single +5 V supply and is compatible with various analog input ranges, making it versatile for different measurement scenarios.
Key Specifications
| Parameter | Value | Conditions/Comments |
|---|---|---|
| Number of Channels | 1 | - |
| Number of Bits | 24 | - |
| Voltage - Supply, Analog | 5 V | - |
| Voltage - Supply, Digital | 2.7 V to 5.25 V | - |
| Package/Case | 24-TSSOP (0.173", 4.40mm Width) | - |
| Power (Watts) | 125 mW | - |
| Analog Input Ranges | 0 mV to ±10 mV, +20 mV, +40 mV, +80 mV (unipolar and bipolar) | - |
| Resolution | 1 in 230,000 counts | - |
| Offset Drift | < 5 nV/°C | - |
| Gain Drift | < 2 ppm/°C | - |
Key Features
- Programmable gain front end with analog modulator
- Low-pass programmable digital filter for adjustable filter cutoff, output rate, and settling time
- On-chip 6-bit DAC for TARE voltage removal
- Single +5 V supply operation
- Buffered differential programmable gain analog inputs and differential reference input
- Serial interface compatible with microcontrollers and digital signal processors
- Self-calibration and system calibration options
- Clock signals for synchronizing AC excitation of the bridge
Applications
The AD7730BRUZ is primarily used in weigh-scale and pressure measurement applications. It is particularly suitable for load cell applications due to its high precision and ability to handle low-level signals directly from transducers. Other potential applications include industrial measurement systems and any scenario requiring precise analog-to-digital conversion of low-level signals.
Q & A
- What is the primary function of the AD7730BRUZ? The AD7730BRUZ is a complete analog front end designed for weigh-scale and pressure measurement applications, converting low-level signals from transducers into a serial digital output.
- What are the key features of the AD7730BRUZ? Key features include a programmable gain front end, a low-pass programmable digital filter, an on-chip 6-bit DAC, and single +5 V supply operation.
- What are the analog input ranges supported by the AD7730BRUZ? The device supports unipolar and bipolar analog input ranges: 0 mV to ±10 mV, +20 mV, +40 mV, and +80 mV.
- What is the resolution of the AD7730BRUZ? The peak-to-peak resolution achievable is 1 in 230,000 counts.
- How does the AD7730BRUZ handle calibration? The device features self-calibration and system calibration options.
- What is the power consumption of the AD7730BRUZ? The power consumption is 125 mW.
- In what package is the AD7730BRUZ available? The device is available in a 24-TSSOP package.
- What are the typical applications of the AD7730BRUZ? Typical applications include weigh-scale and pressure measurement, particularly in load cell applications.
- How does the AD7730BRUZ handle offset and gain drift? The device has an offset drift of less than 5 nV/°C and a gain drift of less than 2 ppm/°C.
- Is the AD7730BRUZ compatible with microcontrollers and digital signal processors? Yes, the serial interface of the AD7730BRUZ is compatible with microcontrollers and digital signal processors.
