Overview
The AD977BRZ, produced by Analog Devices Inc., is a high-speed, low-power 16-bit Analog-to-Digital Converter (ADC). This device operates from a single 5 V supply and is available in a 20-lead SOIC package. The AD977 and its variant, AD977A, differ primarily in their throughput rates, with the AD977 offering a 100 kSPS throughput rate and the AD977A offering a 200 kSPS throughput rate. The ADC is based on a successive approximation, switched capacitor architecture and is factory calibrated to minimize linearity errors. It features a high-speed serial interface and an on-chip clock, making it suitable for various high-performance applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16 bits |
| Throughput Rate | 100 kSPS (AD977), 200 kSPS (AD977A) |
| Supply Voltage | Single 5 V |
| Power Dissipation | 100 mW Max |
| Power-Down Mode | 50 µW |
| Input Ranges | Unipolar: 0 V–10 V, 0 V–5 V, 0 V–4 V; Bipolar: ±10 V, ±5 V, ±3.3 V |
| Reference | Choice of External or Internal 2.5 V Reference |
| Package | 20-Lead Skinny SOIC, 28-Lead Skinny SSOP |
| Operating Temperature | -40°C to +85°C |
| Signal-to-Noise Ratio (SNR) | 83 dB to 85 dB |
| Total Harmonic Distortion (THD) | -90 dB to -96 dB |
Key Features
- Fast throughput rates of 100 kSPS and 200 kSPS for AD977 and AD977A, respectively.
- Single 5 V supply operation with low power dissipation (100 mW max) and a power-down mode (50 µW).
- Multiple input ranges: unipolar (0 V–10 V, 0 V–5 V, 0 V–4 V) and bipolar (±10 V, ±5 V, ±3.3 V).
- Choice of external or internal 2.5 V reference.
- High-speed serial interface and on-chip clock.
- Factory calibrated to minimize linearity errors.
- Comprehensive testing for AC parameters such as SNR and THD, as well as DC parameters of offset, gain, and linearity.
Applications
- Automatic test equipment.
- Process control and industrial automation.
- High-performance data acquisition systems.
- Medical imaging and diagnostic equipment.
- Other applications requiring high-speed, low-power ADCs.
Q & A
- What is the resolution of the AD977/AD977A ADC?
The AD977/AD977A has a resolution of 16 bits. - What are the throughput rates of the AD977 and AD977A?
The AD977 has a throughput rate of 100 kSPS, while the AD977A has a throughput rate of 200 kSPS. - What is the supply voltage for the AD977/AD977A?
The AD977/AD977A operates from a single 5 V supply. - What are the input ranges for the AD977/AD977A?
The input ranges include unipolar (0 V–10 V, 0 V–5 V, 0 V–4 V) and bipolar (±10 V, ±5 V, ±3.3 V). - Does the AD977/AD977A have an internal reference?
Yes, it offers a choice of external or internal 2.5 V reference. - What is the power dissipation of the AD977/AD977A?
The power dissipation is 100 mW max, with a power-down mode of 50 µW. - What are the package options for the AD977/AD977A?
The device is available in 20-Lead Skinny SOIC and 28-Lead Skinny SSOP packages. - What is the operating temperature range for the AD977/AD977A?
The operating temperature range is -40°C to +85°C. - What are some common applications for the AD977/AD977A?
Common applications include automatic test equipment, process control, industrial automation, and high-performance data acquisition systems. - Is the AD977/AD977A factory calibrated?
Yes, the AD977/AD977A is factory calibrated to minimize linearity errors.
