Overview
The AD7812WYRUZ-RL is a high-speed, low-power 10-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the AD7811 and AD7812 series, which operate from a single 2.7 V to 5.5 V supply. The AD7812 features eight single-ended input channels, which can also be configured as pseudo differential inputs using the control register. It includes a 2.3 µs successive approximation ADC, an on-chip track/hold amplifier, and a 2.5 V on-chip reference. The device is designed for high-speed sampling and includes automatic power-down modes to reduce power consumption at lower throughput rates.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 10-bit |
| Number of Channels | 8 single-ended or pseudo differential |
| Sampling Rate | 350 kSPS |
| Conversion Time | 2.3 µs |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Power Consumption | Typically 10 mW at full throughput, significantly reduced at lower rates |
| Reference Voltage | On-chip 2.5 V (±2.5%) or external reference |
| Package Type | 20-Lead TSSOP |
| Operating Temperature Range | -40°C to 85°C |
Key Features
- High-speed serial interface compatible with most DSPs and microcontrollers.
- On-chip track/hold amplifier and 2.5 V reference circuit.
- Option to use an external reference by connecting it to the VREF pin.
- Software and hardware control of convert start and power-down modes.
- Automatic power-down mode to reduce power consumption at lower throughput rates.
- Ability for multiple devices to share the same serial bus with individual addressing.
- Qualified for automotive applications.
Applications
- Data acquisition systems.
- Industrial control systems.
- Automotive systems.
- Medical devices requiring high-speed and low-power ADCs.
- Embedded systems and IoT devices.
Q & A
- What is the resolution of the AD7812 ADC?
The AD7812 has a 10-bit resolution.
- How many input channels does the AD7812 have?
The AD7812 has eight single-ended input channels, which can also be configured as pseudo differential inputs.
- What is the sampling rate of the AD7812?
The AD7812 has a sampling rate of 350 kSPS.
- What is the conversion time of the AD7812?
The conversion time is 2.3 µs.
- What is the supply voltage range for the AD7812?
The supply voltage range is from 2.7 V to 5.5 V.
- Can the AD7812 use an external reference voltage?
Yes, the AD7812 allows the use of an external reference voltage by connecting it to the VREF pin and setting the EXTREF bit in the control register.
- How does the AD7812 manage power consumption at lower throughput rates?
The AD7812 features an automatic power-down mode to reduce power consumption at lower throughput rates.
- Can multiple AD7812 devices share the same serial bus?
Yes, multiple devices can share the same serial bus and be individually addressed by hardwiring the device address pin.
- What types of packages are available for the AD7812?
The AD7812 is available in 20-lead TSSOP, SOIC, and mini-DIP packages.
- Is the AD7812 qualified for automotive applications?
Yes, the AD7812 is qualified for automotive applications.
