Overview
The AD7707BRU, manufactured by Analog Devices Inc., is a comprehensive analog front end designed for low-frequency measurement applications. This 3-channel device is capable of accepting both low-level input signals directly from transducers and high-level signals, producing a serial digital output. It employs a Σ-Δ (Sigma-Delta) conversion technique to achieve up to 16 bits of no missing codes performance. The AD7707BRU operates from a single supply voltage ranging from 2.7 V to 5.25 V, making it versatile for various power requirements.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 16 |
| Number of Channels | 3 |
| Input Type | Pseudo-Differential, Single Ended |
| Input Signal Ranges | 0 mV to 20 mV, 0 V to 2.5 V, ±10 V, ±5 V, 0 V to 10 V, 0 V to 5 V |
| Supply Voltage | 2.7 V to 3.3 V, 4.75 V to 5.25 V |
| Power Dissipation | Less than 1 mW at 3 V |
| Standby Current | Less than 8 μA |
| Package | 20-Lead TSSOP, 20-Lead SOIC |
| Data Interface | SPI, QSPI, MICROWIRE, DSP compatible |
| Sampling Rate | Up to 500 samples per second |
Key Features
- Programmable Gain Front End: The AD7707BRU features a proprietary programmable gain front end, allowing for gains from 1 to 128.
- Low Power Consumption: It consumes less than 1 mW at 3 V supplies and has a standby current of less than 8 μA.
- High-Level Input Capability: The device can directly accommodate high-level input signals (±10 V, ±5 V, 0 V to 10 V, 0 V to 5 V) without requiring split supplies or charge-pumps.
- Low-Level Input Channels: It can accept input signals directly from strain gages or transducers, reducing the need for additional signal conditioning.
- Excellent Static Performance: The AD7707BRU offers 16 bits, no missing codes, ±0.003% accuracy, and low rms noise. On-chip calibration options eliminate zero-scale and full-scale errors.
Applications
The AD7707BRU is ideal for various applications requiring precise analog-to-digital conversion, including:
- Smart sensors and transducers
- Microcontroller or DSP-based systems
- Low-frequency measurement applications such as industrial control, medical devices, and data acquisition systems.
Q & A
- What is the number of bits and channels of the AD7707BRU?
The AD7707BRU is a 16-bit, 3-channel analog-to-digital converter.
- What are the input signal ranges supported by the AD7707BRU?
The device supports input signal ranges from 0 mV to 20 mV, 0 V to 2.5 V, and high-level signals up to ±10 V.
- What are the supply voltage options for the AD7707BRU?
The AD7707BRU operates from a single supply voltage ranging from 2.7 V to 3.3 V or 4.75 V to 5.25 V.
- How much power does the AD7707BRU consume?
The device consumes less than 1 mW at 3 V supplies and has a standby current of less than 8 μA.
- What types of packages are available for the AD7707BRU?
The AD7707BRU is available in 20-Lead TSSOP and 20-Lead SOIC packages.
- What data interfaces does the AD7707BRU support?
The device supports SPI, QSPI, MICROWIRE, and DSP-compatible interfaces.
- What is the sampling rate of the AD7707BRU?
The AD7707BRU can sample up to 500 samples per second.
- What are the key features of the AD7707BRU's programmable gain front end?
The programmable gain front end allows for gains from 1 to 128 and can handle both low-level and high-level input signals.
- How does the AD7707BRU handle signal conditioning for low-level inputs?
The device can accept input signals directly from strain gages or transducers, reducing the need for additional signal conditioning.
- What are the static performance specifications of the AD7707BRU?
The AD7707BRU offers 16 bits, no missing codes, ±0.003% accuracy, and low rms noise, with on-chip calibration options to eliminate zero-scale and full-scale errors.
