The HI7190IP is a monolithic instrumentation, sigma delta A/D converter which operates from ±5V supplies. Both the signal and reference inputs are fully differential for maximum flexibility and performance. An internal Programmable Gain Instrumentation Amplifier (PGIA) provides input gains from 1 to 128 eliminating the need for external pre-amplifiers. The on-demand converter auto calibrate function is capable of removing offset and gain errors existing in 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 the same device, but the HI7190 has tighter linearity specifications. The HI7190 contains a serial I/O port and is compatible with most synchronous transfer formats including both the 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 allow the user to read and write calibration data. 

Features:-

• 22-Bit Resolution with No Missing Code

• 0.0007% Integral Non-Linearity (Typ) 

• 20mV to ±2.5V Full Scale Input Ranges 

• Internal PGIA with Gains of 1 to 128 

• Serial Data I/O Interface, SPI Compatible 

• Differential Analog and Reference Inputs 

• Internal or System Calibration 

• 120dB Rejection of 60/50Hz Line Noise 

• Settling Time of 4 Conversions (Max) for a Step Input

Specifications:- 

Related Document:-

 HI7190IP IC Datasheet