HI7191 Manufacturer
HI7191 DescriptionHI7191 DescriptionHI7191 Categories
HI7191 Datasheet (PDF)
HI7191 Price & Availability
HI7191 Features- 20-Bit Resolution with No Missing Code
- 0.0015% 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
HI7191 Features
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20-Bit Resolution with No Missing Code
-
0.0015% 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
-
Pb-Free Plus Anneal Available (RoHS Compliant)
HI7191 Description
The Intersil HI7191 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 on-board 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 specs.
The HI7191 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.
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