Overview
The AD677KD is a 16-bit serial output analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the AD677 series, known for its high performance and versatility in signal processing applications. The AD677KD utilizes a switched-capacitor/charge redistribution architecture, achieving a conversion rate of 100 kSPS with a total conversion time of 10 µs. It is optimized for both ac (dynamic) and dc parameters, making it suitable for a wide range of applications, including signal processing and measurement.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 16 |
| Sampling Rate | 100 kSPS |
| Polarity | Bipolar |
| Interface | SPI, Serial |
| Integral Nonlinearity (INL) | ±1 LSB |
| Number of A/D Converters | 1 |
| Package | 16-pin SOIC (0.154, 3.90mm Width) |
| Supply Voltage | +5 V and ±12 V |
| Power Consumption | Typically 450 mW (with 10 V reference), 360 mW (with 5 V reference) |
| Signal to Noise Ratio (SNR) | 92 dB peak spurious –101 dB |
| Total Harmonic Distortion (THD) | –99 dB |
Key Features
- Autocalibration for excellent dc performance without user adjustments or additional external circuitry.
- Input range of ±5 V to ±10 V (±VREF).
- Easy serial interface compatible with standard Analog Devices DSPs.
- TTL compatible inputs and outputs.
- Excellent ac performance with –99 dB THD and 92 dB S/(N+D) peak spurious –101 dB.
- Industry-leading dc performance with 1.0 LSB INL and ±1 LSB full scale and offset.
- Separate analog and digital grounds to reduce digital crosstalk.
- Analog ground sense for remote sensing of the signal source ground potential.
- Capacitor-array, charge redistribution technique for analog-to-digital conversion, eliminating the need for external sample/hold circuitry.
Applications
The AD677KD is suitable for various applications requiring high precision and speed in analog-to-digital conversion. These include:
- Signal processing applications where dynamic parameters such as S/(N+D) Ratio, THD, and IMD are critical.
- Measurement applications where dc parameters such as INL and offset are important.
- Industrial and instrumentation systems requiring accurate and reliable data acquisition.
- Military and aerospace applications where robust performance and reliability are essential.
Q & A
- What is the resolution of the AD677KD ADC?
The AD677KD has a 16-bit resolution.
- What is the sampling rate of the AD677KD?
The AD677KD has a sampling rate of 100 kSPS.
- What is the input range of the AD677KD?
The input range is ±5 V to ±10 V (±VREF).
- Does the AD677KD require external sample/hold circuitry?
No, the AD677KD includes an internal sample/hold function using a capacitor-array, charge redistribution technique.
- What is the power consumption of the AD677KD?
Typically 450 mW with a 10 V reference and 360 mW with a 5 V reference.
- What are the key ac performance metrics of the AD677KD?
The AD677KD has –99 dB THD and 92 dB S/(N+D) peak spurious –101 dB.
- How does the AD677KD handle digital crosstalk?
The AD677KD has separate analog and digital grounds to reduce digital crosstalk.
- What is the significance of autocalibration in the AD677KD?
Autocalibration eliminates the need for user adjustments or additional external circuitry, ensuring excellent dc performance by compensating for internal nonlinearities.
- What interface does the AD677KD use?
The AD677KD uses a serial interface compatible with standard Analog Devices DSPs.
- What are the typical operating temperatures for the AD677KD?
The AD677KD operates from 0°C to +70°C.
