Overview
The AD7761BSTZ, produced by Analog Devices Inc., is an 8-channel, 16-bit, simultaneous sampling sigma-delta (Σ-Δ) analog-to-digital converter (ADC). This device is designed to provide high precision and flexibility in both ac and dc signal measurements. It features a Σ-Δ modulator and digital filter per channel, enabling synchronized sampling of signals. The AD7761 is particularly useful for applications requiring high dynamic range, low noise, and adjustable power consumption.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Data Rate (ODR) per Channel | 32 kSPS to 256 kSPS | kSPS | ||
| Input Bandwidth | 13.8 kHz to 110.8 kHz | kHz | ||
| Dynamic Range | 97.7 dB | dB | ||
| Integral Nonlinearity (INL) | ±1 | ±1 | ±1 | LSB |
| Offset Error | ±1 | ±1 | ±1 | LSB |
| Gain Error | ±5 | LSB | ||
| Power Consumption per Channel | 9.375 | 27.5 | 51.5 | mW |
| Operating Temperature Range | −40 | +105 | °C | |
| Package Type | 64-Lead LQFP (10mm x 10mm) | |||
Key Features
- Simultaneous Sampling: The AD7761 allows for synchronized sampling of ac and dc signals across all 8 channels.
- Power Scaling: The device offers three power modes (fast, median, and low power) to optimize between input bandwidth, output data rate, and power dissipation.
- Digital Filtering: Extensive digital filtering capabilities, including wideband and sinc5 filters, with adjustable decimation rates to optimize noise performance.
- Analog Functionality: Embedded analog functionality such as precharge buffers on each analog input and reference precharge buffers to reduce input current and glitches.
- Flexible Supply Voltages: Operates with a range of supply voltages: AVDD1 (4.5 V to 5.5 V), AVDD2 (2.0 V to 5.5 V), and IOVDD (1.72 V to 1.88 V and 2.25 V to 3.6 V).
Applications
- High-Performance Measurement Modules: Suitable for both low power dc and high performance ac measurements.
- Industrial Automation: Ideal for precision measurement and control in industrial automation systems.
- Medical Devices: Used in medical devices requiring high accuracy and low noise in signal acquisition.
- Aerospace and Defense: Applicable in various aerospace and defense applications where precision and reliability are critical.
Q & A
- What is the maximum output data rate per channel of the AD7761?
The maximum output data rate per channel is 256 kSPS.
- What is the dynamic range of the AD7761?
The dynamic range is 97.7 dB.
- How many power modes does the AD7761 offer?
The AD7761 offers three power modes: fast, median, and low power.
- What types of digital filters are available on the AD7761?
The device features wideband and sinc5 filters with adjustable decimation rates.
- What is the operating temperature range of the AD7761?
The operating temperature range is −40°C to +105°C.
- What is the package type of the AD7761?
The device is housed in a 64-Lead LQFP package (10mm x 10mm).
- Does the AD7761 require an external reference voltage?
- What are the supply voltage ranges for the AD7761?
The device operates with AVDD1 (4.5 V to 5.5 V), AVDD2 (2.0 V to 5.5 V), and IOVDD (1.72 V to 1.88 V and 2.25 V to 3.6 V).
- What kind of analog functionality is embedded in each ADC channel?
Each channel has precharge buffers on the analog inputs and reference precharge buffers to reduce input current and glitches.
- Can the AD7761 be used in both ac and dc signal measurements?
