Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| ADC | 12-bit delta-sigma system monitor |
| Inputs | 8 configurable single-ended / pseudo-differential channels |
| Reference | Internal 2.56 V or external VREF |
| Temperature | Integrated local temperature sensor; ±2°C from −25°C to +100°C stated |
| Alarms | Window comparators, masks/status and INT output |
| Interface | I²C with 9 selectable addresses and timeout recovery |
| Use | Power/thermal/hardware monitoring rather than high-speed sampling |
| Exact Package / Packing | TSSOP (PW), 16 pins; 2500-piece large reel |
Product Overview
ADC128D818CIMTX/NOPB is a supervisory ADC rather than a waveform digitizer. Eight voltage channels, a local temperature sensor and per-channel limit/status registers let a host monitor rails, margins and board temperature through one I²C device.
The internal 2.56 V reference simplifies rail supervision; an external reference can be used when the input scaling or accuracy target requires a different full scale. Conversion speed is modest, consistent with system-health monitoring.
Interrupt/status logic can notify the host only when a measured value leaves a programmed window, reducing polling load.
For related devices, see HKEQGOO’s ADCs category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | ADC128D818CIMTX/NOPB |
| ADC | 12-bit delta-sigma system monitor |
| Inputs | 8 configurable single-ended / pseudo-differential channels |
| Reference | Internal 2.56 V or external VREF |
| Temperature | Integrated local temperature sensor; ±2°C from −25°C to +100°C stated |
| Alarms | Window comparators, masks/status and INT output |
| Interface | I²C with 9 selectable addresses and timeout recovery |
| Use | Power/thermal/hardware monitoring rather than high-speed sampling |
| Exact Package / Packing | TSSOP (PW), 16 pins; 2500-piece large reel |
| Manufacturer Status | Active / Production |
| Part Marking | 128D818 CIMT |
Functional Highlights
Integrated thresholds make monitoring autonomous
The host does not need to continuously read every rail to detect an out-of-window event.
Pseudo-differential modes can reject some local ground offset
They are still limited by allowed input/common-mode conditions and are not substitutes for a true high-CMRR instrumentation ADC.
Design Considerations
- Scale each monitored rail so worst-case voltage remains inside the selected reference/input range.
- Program mask/window registers to avoid nuisance interrupts from normal rail ripple.
- Use the temperature sensor for local PCB temperature, not remote component-junction temperature.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists ADC128D818CIMTX/NOPB as Active / Production; TSSOP (PW), 16 pins; 2500-piece large tape and reel; −40°C to +125°C.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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