Overview
The AD7870AJN is a 12-bit, 100 kHz sampling Analog-to-Digital Converter (ADC) produced by Analog Devices Inc. This component is part of the AD7870A series and is designed for high-performance applications requiring precise analog-to-digital conversion. The AD7870AJN features a successive approximation ADC architecture, a high-speed comparator, a track-and-hold amplifier, and an on-chip temperature-compensated buried Zener reference. It operates within a temperature range of 0°C to +70°C, making it suitable for a variety of environmental conditions.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Sampling Rate | Up to 100 kHz |
| Input Range | ±3 V (peak-peak) |
| Reference Voltage | 3 V ± 10 mV |
| Reference Output Current | Up to 500 µA |
| Track-and-Hold Acquisition Time | |
| Throughput Rate (with 2.5 MHz clock) | 10 µs max |
| Operating Temperature Range | 0°C to +70°C |
| Supply Voltage | +5 V ± 5%, -5 V ± 5% |
Key Features
- Successive approximation ADC with high-speed comparator and SAR logic
- On-chip temperature-compensated buried Zener reference (3 V ± 10 mV)
- Track-and-hold amplifier with high input bandwidth (0.1 dB cutoff frequency at 500 kHz)
- Fast settling voltage-output DAC
- Internal clock oscillator and control logic
- Bipolar offset and full-scale adjustment capabilities
Applications
The AD7870AJN is suitable for various high-performance applications, including but not limited to:
- Digital signal processing (DSP) systems
- Industrial control systems
- Medical devices requiring precise analog-to-digital conversion
- Aerospace and defense systems
- High-speed data acquisition systems
Q & A
- What is the resolution of the AD7870AJN ADC?
The AD7870AJN has a resolution of 12 bits. - What is the maximum sampling rate of the AD7870AJN?
The maximum sampling rate is up to 100 kHz. - What is the input voltage range of the AD7870AJN?
The input voltage range is ±3 V (peak-peak). - Does the AD7870AJN have an internal reference voltage?
Yes, it has an on-chip temperature-compensated buried Zener reference of 3 V ± 10 mV. - How much current can the reference output provide?
The reference output can provide up to 500 µA. - What is the acquisition time of the track-and-hold amplifier?
The track-and-hold amplifier acquires the input signal in less than 2 µs. - What is the throughput rate with a 2.5 MHz clock?
The throughput rate is 10 µs max with a 2.5 MHz clock. - What is the operating temperature range of the AD7870AJN?
The operating temperature range is 0°C to +70°C. - What are the supply voltage requirements for the AD7870AJN?
The supply voltage requirements are +5 V ± 5% and -5 V ± 5%. - What type of applications is the AD7870AJN suitable for?
The AD7870AJN is suitable for high-performance applications such as DSP systems, industrial control systems, medical devices, aerospace and defense systems, and high-speed data acquisition systems.
