Overview
The AD7730BRUZ-REEL, produced by Analog Devices Inc., is a 24-bit, sigma-delta analog-to-digital converter (ADC) designed as a complete analog front end for weigh-scale and pressure measurement applications. This device accepts low-level signals directly from a transducer and outputs a serial digital word. It features a proprietary programmable gain front end based around an analog modulator and a low-pass programmable digital filter, allowing for adjustment of filter cutoff, output rate, and settling time.
Key Specifications
| Parameter | Value | Conditions/Comments |
|---|---|---|
| Resolution | 24-bit | |
| Input Ranges (Unipolar) | 0 mV to ±10 mV, +20 mV, +40 mV, +80 mV | |
| Input Ranges (Bipolar) | ±10 mV, ±20 mV, ±40 mV, ±80 mV | |
| Peak-to-Peak Resolution | 1 in 230,000 counts | |
| Supply Voltage | +5 V | |
| Offset Drift | < 5 nV/°C | |
| Gain Drift | < 2 ppm/°C | |
| On-chip DAC | 6-bit DAC for offset/TARE removal | |
| Package Type | 24-Lead TSSOP | |
| Clock Frequency | fCLK IN = 4.9152 MHz |
Key Features
- Programmable gain front end with two buffered differential analog inputs and a differential reference input.
- On-chip 6-bit DAC for offset/TARE removal.
- FASTStep mode for AC or DC excitation.
- Single supply operation (+5 V).
- Serial interface configurable for three-wire operation, compatible with microcontrollers and digital signal processors.
- Self-calibration and system calibration options.
- Low power consumption in standby mode (5 μA).
Applications
The AD7730BRUZ-REEL is primarily used in weigh-scale and pressure measurement applications. It is suitable for any scenario where precise measurement of low-level signals from transducers is required.
Q & A
- What is the resolution of the AD7730BRUZ-REEL?
The AD7730BRUZ-REEL has a 24-bit resolution. - What are the input ranges for the AD7730BRUZ-REEL?
The device supports both unipolar and bipolar input ranges: 0 mV to ±10 mV, +20 mV, +40 mV, +80 mV for unipolar and ±10 mV, ±20 mV, ±40 mV, ±80 mV for bipolar. - What is the peak-to-peak resolution of the AD7730BRUZ-REEL?
The peak-to-peak resolution is 1 in 230,000 counts. - What is the supply voltage for the AD7730BRUZ-REEL?
The device operates from a single +5 V supply. - Does the AD7730BRUZ-REEL have on-chip calibration capabilities?
Yes, it features self-calibration and system calibration options. - What is the purpose of the on-chip 6-bit DAC in the AD7730BRUZ-REEL?
The on-chip 6-bit DAC is used for offset/TARE removal. - What is the package type of the AD7730BRUZ-REEL?
The device is packaged in a 24-Lead TSSOP. - What is the clock frequency for the AD7730BRUZ-REEL?
The clock frequency is fCLK IN = 4.9152 MHz. - Is the AD7730BRUZ-REEL suitable for low power applications?
Yes, it has a low power consumption in standby mode (5 μA). - What are the primary applications of the AD7730BRUZ-REEL?
The primary applications are weigh-scale and pressure measurement.
