Overview
The Intersil HI7191IB is a monolithic instrumentation, sigma delta Analog-to-Digital Converter (ADC) designed for high precision applications. It operates from dual ±5V supplies and features fully differential signal and reference inputs for maximum flexibility and performance. The device includes an internal Programmable Gain Instrumentation Amplifier (PGIA) that provides input gains from 1 to 128, eliminating the need for external pre-amplifiers. The HI7191IB also includes an on-demand converter auto-calibrate function to remove offset and gain errors, and a user-programmable digital filter for noise rejection and fine-tuning of resolution and conversion speed.
Key Specifications
| Parameter | Value |
|---|---|
| Voltage - Supply, Analog | ±5V |
| Voltage - Supply, Digital | 5V |
| Number of Analog In Channels | 1 |
| Resolution | 24-bit |
| Sampling Rate (Per Second) | 625 |
| Input Gain Range | 1 to 128 |
| Operating Temperature Range | -40 to 85°C |
| Package Type | 20 Ld SOIC (Pb-free) |
Key Features
- High precision 24-bit sigma delta ADC with internal PGIA providing gains from 1 to 128.
- Fully differential signal and reference inputs for enhanced performance.
- On-demand converter auto-calibrate function to remove offset and gain errors.
- User-programmable digital filter offering over 120dB of 60/50Hz noise rejection.
- Support for unipolar and bipolar input modes.
- Serial I/O port compatible with most synchronous transfer formats.
Applications
The HI7191IB is suitable for various high precision data acquisition applications, including:
- Industrial process control and measurement.
- Medical instrumentation.
- Aerospace and defense systems.
- Test and measurement equipment.
- High-end audio and professional audio systems.
Q & A
- What is the resolution of the HI7191IB ADC?
The HI7191IB has a 24-bit resolution.
- What are the supply voltages for the HI7191IB?
The device operates from dual ±5V analog supplies and a 5V digital supply.
- What is the input gain range of the HI7191IB?
The internal PGIA provides input gains from 1 to 128.
- Does the HI7191IB have an auto-calibrate function?
Yes, it has an on-demand converter auto-calibrate function to remove offset and gain errors.
- What type of noise rejection does the HI7191IB offer?
The device offers over 120dB of 60/50Hz noise rejection through its user-programmable digital filter.
- What are the operating temperature ranges for the HI7191IB?
The device operates in the temperature range of -40 to 85°C.
- What package types are available for the HI7191IB?
The device is available in a 20 Ld SOIC (Pb-free) package.
- Is the HI7191IB compatible with synchronous transfer formats?
Yes, it has a serial I/O port compatible with most synchronous transfer formats.
- What are some common applications for the HI7191IB?
Common applications include industrial process control, medical instrumentation, aerospace and defense systems, test and measurement equipment, and high-end audio systems.
- Does the HI7191IB support both unipolar and bipolar input modes?
Yes, it supports both unipolar and bipolar input modes.
