Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Configuration | 1-channel 8:1 precision multiplexer |
| Supply | 1.08–5.5 V single or ±2.5 V dual |
| Leakage | 3 pA stated low leakage |
| On-Resistance | 2.5 Ω stated feature |
| Charge Injection | 1 pC stated feature |
| Logic | 1.8 V compatible, fail-safe |
| Switching | Bidirectional rail-to-rail, break-before-make |
| Exact Package / Packing | TSSOP (PW), 16 pins; 2000-piece large tape and reel |
Product Overview
TMUX1108PWR expands the low-leakage TMUX110x precision architecture to eight selectable inputs. It is useful when one ADC or amplifier must scan many high-impedance sensor channels without adding significant DC leakage.
Dual-supply operation to ±2.5 V permits signals centered around ground, avoiding the biasing needed by a purely 0–5 V analog path. This is a real signal-range difference from many low-voltage single-supply multiplexers.
The 8:1 topology increases source-selection density but also adds routing/capacitance concentration at the common node. Acquisition time should be validated at the worst source impedance/channel transition.
For related devices, see HKEQGOO’s Analog Switches & Multiplexers category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | TMUX1108PWR |
| Configuration | 1-channel 8:1 precision multiplexer |
| Supply | 1.08–5.5 V single or ±2.5 V dual |
| Leakage | 3 pA stated low leakage |
| On-Resistance | 2.5 Ω stated feature |
| Charge Injection | 1 pC stated feature |
| Logic | 1.8 V compatible, fail-safe |
| Switching | Bidirectional rail-to-rail, break-before-make |
| Exact Package / Packing | TSSOP (PW), 16 pins; 2000-piece large tape and reel |
| Manufacturer Status | Active / Production |
| Part Marking | TM1108 |
Functional Highlights
Eight channels reduce ADC/front-end count
Channel density is valuable in multi-sensor DAQ, but throughput per channel falls as one converter settles and samples each source sequentially.
Dual ±2.5 V rails allow bipolar low-voltage signals
This can simplify precision bipolar sensor paths while preserving picoamp leakage and low charge injection.
Design Considerations
- Calculate per-channel sample time from total scan rate and worst-case settling.
- When using dual supplies, keep every source within VSS–VDD and verify control logic remains referenced correctly.
- Use guarding/clean PCB practices if source impedances are high enough for picoamp leakage to matter.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists TMUX1108PWR as Active / Production; TSSOP (PW), 16 pins; 2000-piece large tape and reel; Level-1-260C-UNLIM; −40°C to +125°C; marking TM1108.
Related Engineering Resources
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