Overview
The AD7730BRZ-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 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 and a low pass programmable digital filter, allowing for adjustable filter cutoff, output rate, and settling time. The AD7730BRZ-REEL7 operates from a single +5 V supply and is available in a 24-lead SOIC (Wide) package.
Key Specifications
| Parameter | Value | Conditions/Comments |
|---|---|---|
| Resolution | 24-bit | |
| Conversion Rate | Up to 1.2 kSPS | |
| Analog Input Ranges | Unipolar: 0 mV to ±10 mV, +20 mV, +40 mV, +80 mV; Bipolar: ±10 mV, ±20 mV, ±40 mV, ±80 mV | |
| Peak-to-Peak Resolution | 1 in 230,000 counts | |
| Offset Drift | < 5 nV/°C | |
| Gain Drift | < 2 ppm/°C | |
| Supply Voltage | +2.7 V to +5.25 V | |
| Power Consumption | Typically 125 mW at 5 V | |
| Operating Temperature | -40°C to +85°C | |
| Package Type | 24-Lead SOIC (Wide) |
Key Features
- Proprietary programmable gain front end based on an analog modulator.
- Low pass programmable digital filter for adjustable filter cutoff, output rate, and settling time.
- Two buffered differential programmable gain analog inputs and a differential reference input.
- On-chip 6-bit DAC for removing TARE voltages.
- Clock signals for synchronizing AC excitation of the bridge.
- Self-calibration and system calibration options.
- Serial interface configurable for three-wire operation, compatible with microcontrollers and digital signal processors.
- Standby mode reducing power consumption to 5 μA.
Applications
- Weigh-scale applications.
- Pressure measurement applications.
- Load cell applications.
- General industrial measurement and control systems requiring high precision and low noise.
Q & A
- What is the primary application of the AD7730BRZ-REEL7?
The AD7730BRZ-REEL7 is primarily used in weigh-scale and pressure measurement applications.
- What is the resolution of the AD7730BRZ-REEL7?
The AD7730BRZ-REEL7 has a 24-bit resolution.
- What are the available analog input ranges for the AD7730BRZ-REEL7?
The device supports unipolar ranges of 0 mV to ±10 mV, +20 mV, +40 mV, +80 mV and bipolar ranges of ±10 mV, ±20 mV, ±40 mV, ±80 mV.
- How does the AD7730BRZ-REEL7 handle offset and gain drift?
The device features an offset drift of less than 5 nV/°C and a gain drift of less than 2 ppm/°C.
- What is the power consumption of the AD7730BRZ-REEL7 in standby mode?
In standby mode, the power consumption is reduced to 5 μA.
- What types of packages are available for the AD7730BRZ-REEL7?
The AD7730BRZ-REEL7 is available in a 24-Lead SOIC (Wide) package.
- Can the AD7730BRZ-REEL7 be used with microcontrollers and digital signal processors?
Yes, the serial interface of the AD7730BRZ-REEL7 is compatible with microcontrollers and digital signal processors.
- What is the operating temperature range of the AD7730BRZ-REEL7?
The operating temperature range is -40°C to +85°C.
- Does the AD7730BRZ-REEL7 support self-calibration and system calibration?
Yes, the device supports both self-calibration and system calibration options.
- What is the purpose of the on-chip 6-bit DAC in the AD7730BRZ-REEL7?
The on-chip 6-bit DAC is used for removing TARE voltages.
