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.
| 芯片型号 | 产品状态 | 温度范围 | 封装尺寸图 | 潮湿敏感度等级MSL | 美元价格US $ |
| HI7191IB | 量产 | 工业级 | 20 Ld SOIC | 1 | 13.04 |
| HI7191IBZ | 量产 | 工业级 | 20 Ld SOIC | 3 | 13.04 |
| HI7191IBZ-T | 量产 | 工业级 | 20 Ld SOIC T+R | 3 | 13.04 |
| HI7191IP | 量产 | 工业级 | 20 Ld PDIP | N/A | 13.04 |
| HI7191IPZ | 量产 | 工业级 | 20 Ld PDIP | N/A | 13.04 |