Overview
The AD7770ACPZ-RL is a high-performance, 8-channel, simultaneous sampling analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is designed for applications requiring high accuracy and flexibility in data acquisition. The AD7770 features eight full sigma-delta (Σ-Δ) ADCs on a single chip, each with a programmable gain stage to maximize the dynamic range of the signal chain. It supports various analog input configurations, including true differential, pseudo differential, and single-ended signals, making it versatile for different sensor output configurations.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 8 | |
| Resolution | 12 Bits | |
| Analog Input Range | Unipolar (0 V to VREF), True Bipolar (±VREF/2) | |
| Programmable Gain | 1, 2, 4, 8 | |
| VREF Voltage Range | 1 V to 3.6 V | |
| Operating Temperature Range | −40°C to +105°C (specified), up to +125°C (functional) | °C |
| Clock Source Frequency | High Resolution Mode: 0.655 MHz to 8.192 MHz, Low Power Mode: 1.3 MHz to 4.096 MHz | MHz |
| Power Consumption per Channel | High Resolution Mode: 10.75 mW, Low Power Mode: 3.37 mW | mW |
| Package Type | 64-Lead Lead Frame Chip Scale Package (LFCSP) |
Key Features
- Simultaneous Sampling: All eight channels sample simultaneously, ensuring synchronized data acquisition.
- Programmable Gain Stage: Each channel has a programmable gain stage with gains of 1, 2, 4, and 8 to optimize signal chain dynamic range.
- Flexible Input Configurations: Supports true differential, pseudo differential, and single-ended analog input signals.
- Dual Operating Modes: High resolution mode for higher dynamic range and low power mode for reduced power consumption.
- Internal Reference and Buffer: Includes a 2.5 V reference and reference buffer with a typical temperature coefficient of 10 ppm/°C.
- Low Input Current: Allows direct connection to sensors with minimal loading effects.
Applications
- Protection Relays: Used in safety-critical applications where precise and reliable data acquisition is essential.
- General-Purpose Data Acquisition: Suitable for various data acquisition systems requiring high accuracy and flexibility.
- Industrial Process Control: Ideal for monitoring and controlling industrial processes where precise analog-to-digital conversion is necessary.
Q & A
- What is the number of channels in the AD7770?
The AD7770 has 8 channels.
- What are the programmable gain options for each channel?
The programmable gain options are 1, 2, 4, and 8.
- What is the operating temperature range of the AD7770?
The specified operating temperature range is −40°C to +105°C, although it is functional up to +125°C.
- What are the power consumption modes of the AD7770?
The AD7770 has two modes: high resolution mode consuming 10.75 mW per channel and low power mode consuming 3.37 mW per channel.
- What types of analog input signals does the AD7770 support?
The AD7770 supports true differential, pseudo differential, and single-ended analog input signals.
- What is the resolution of the AD7770 ADC?
The resolution of the AD7770 ADC is 12 bits.
- Does the AD7770 have an internal reference and buffer?
Yes, the AD7770 includes a 2.5 V internal reference and reference buffer.
- What is the typical temperature coefficient of the reference buffer?
The typical temperature coefficient of the reference buffer is 10 ppm/°C.
- Can the AD7770 be used in safety-critical applications?
Yes, the AD7770 is suitable for safety-critical applications such as protection relays.
- What is the package type of the AD7770ACPZ-RL?
The package type is a 64-Lead Lead Frame Chip Scale Package (LFCSP).
