Overview
The HI7191IPZ, produced by Renesas Electronics America Inc, is a high-precision, 24-bit sigma delta analog-to-digital converter (ADC). This monolithic instrumentation ADC operates from ±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. It also includes an on-demand converter auto-calibrate function to remove offset and gain errors in both external and internal circuitry.
Key Specifications
| Specification | Value |
|---|---|
| Number of Bits | 24 |
| Sampling Rate (Per Second) | 625 |
| Number of Inputs | 1 |
| Input Type | Differential |
| Data Interface | SPI |
| Architecture | Sigma-Delta |
| Reference Type | External |
| Voltage - Supply, Analog | ±5V |
| Voltage - Supply, Digital | 5V |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 20-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole |
Key Features
- Internal Programmable Gain Instrumentation Amplifier (PGIA) with gains from 1 to 128.
- On-demand converter auto-calibrate function to remove offset and gain errors.
- User-programmable digital filter providing over 120dB of 60/50Hz noise rejection.
- Serial I/O port compatible with most synchronous transfer formats, including Motorola 6805/11 series SPI and Intel 8051 series SSR protocols.
- Separate analog and digital supplies and grounds to minimize digital noise coupling into the analog circuitry.
- Multiple calibration modes, including system calibration and self-calibration.
Applications
The HI7191IPZ is suitable for a variety of high-precision measurement applications, including industrial process control, medical devices, and precision instrumentation. Its high accuracy and noise rejection capabilities make it ideal for environments where precise analog-to-digital conversion is critical.
Q & A
- What is the resolution of the HI7191IPZ ADC?
The HI7191IPZ has a 24-bit resolution. - What is the sampling rate of the HI7191IPZ?
The sampling rate is 625 samples per second. - What type of input does the HI7191IPZ support?
The HI7191IPZ supports differential inputs. - What is the supply voltage for the HI7191IPZ?
The analog supply voltage is ±5V, and the digital supply voltage is 5V. - What is the operating temperature range of the HI7191IPZ?
The operating temperature range is -40°C to 85°C. - Does the HI7191IPZ have an internal PGA?
Yes, it includes an internal Programmable Gain Instrumentation Amplifier (PGIA) with gains from 1 to 128. - How does the HI7191IPZ handle noise rejection?
The device features a user-programmable digital filter that provides over 120dB of 60/50Hz noise rejection. - What calibration modes are available on the HI7191IPZ?
The device supports both system calibration and self-calibration modes. - What data interface does the HI7191IPZ use?
The HI7191IPZ uses an SPI data interface compatible with various synchronous transfer formats. - How is data integrity maintained during read operations?
Data integrity is maintained by ensuring that the DRDY line remains active (low) if a data read is not completed before the next conversion is available.
