HI7190IP Monolithic Instrumentation Sigma Delta A/D Converter
22-Bit resolution with differential inputs and internal PGIA for maximum performance.
- Supply Voltage: AVDD to AGND +5.5V, AVSS to AGND -5.5V
- DVDD to DGND: +5.5V, DGND to AGND ±0.3V
- Analog Input Pins: AVSS to AVDD
- Digital Input, Output and I/O Pins: DGND to DVDD
- ESD Tolerance: Human Body Model 500 V, Machine Model 100 V, Charged Device Model 1000 V
- Temperature Range: -40°C to 85°C
Top Features:
- 22-Bit Resolution with No Missing Code
- 0.0007% Integral Non-Linearity (Typ)
- Internal PGIA with Gains of 1 to 128
- Serial Data I/O Interface, SPI Compatible
The HI7190IP is a monolithic instrumentation, sigma delta A/D converter that operates from ±5V supplies. Both the signal and reference inputs are fully differential, providing maximum flexibility and performance. An internal Programmable Gain Instrumentation Amplifier (PGIA) offers input gains from 1 to 128, eliminating the need for external pre-amplifiers. The on-demand converter auto-calibrate function can remove offset and gain errors in the external and internal circuitry.
The onboard user programmable digital filter provides over 120dB of 60/50Hz noise rejection and allows fine-tuning of resolution and conversion speed over a wide dynamic range. The HI7190 and HI7191 are functionally identical devices, with the HI7190 having tighter linearity specifications. The HI7190 features a serial I/O port and is compatible with most synchronous transfer formats, including Motorola 6805/11 series SPI and Intel 8051 series SSR protocols.
A sophisticated set of commands gives the user control over calibration, PGIA gain, device selection, standby mode, and several other features. The On-chip Calibration Registers enable the user to read and write calibration data.
Images are for illustration only; actual product may vary.