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Silicon Labs TSM982CUA+
- Part No.:
- TSM982CUA+
- Manufacturer:
- Silicon Labs
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TSM982CUA+.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,380
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Product details
Overview
TSM982CUA+ from Silicon Laboratories is a dual-channel, micropower analog comparator with integrated 1.182V ±2% reference and adjustable hysteresis. It operates from single +2.5V to +11V or dual ±1.25V to ±5.5V supplies, draws ≤6μA max supply current over temperature, features open-drain outputs for wired-OR logic, and supports battery-powered threshold detection in portable instrumentation.
For engineers reviewing the TSM982CUA+ datasheet, TSM982CUA+ pinout, TSM982CUA+ application, or TSM982CUA+ equivalent, key selection criteria include its ultra-low quiescent current, internal reference accuracy and temperature drift, hysteresis configurability via HYST pin, and compatibility with MAX982 as an alternate source.
Technical Context
The TSM982CUA+ integrates two independent comparators sharing a common 1.182V reference referenced to V−, with input common-mode range extending from V− to (V+ − 1.3V). Its open-drain outputs sink current to V− (not GND), distinguishing it from TSM971/TSM984 which use GND-referenced outputs.
Hysteresis is implemented via the dedicated HYST pin, accepting voltages from REF to (REF − 50mV); connecting external resistors between REF, HYST, and V− enables programmable hysteresis bands up to 100mV. Propagation delay is 12μs (high-to-low) at 10mV overdrive with 100pF load and 1MΩ pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V (single) or ±1.25V to ±5.5V (dual) - supports wide-input industrial and battery systems without level-shifting. |
| Max Supply Current | 6μA over −40°C to +85°C - enables multi-year operation on coin-cell batteries in always-on monitoring. |
| Reference Voltage | 1.182V ±2% (0°C to +70°C); ±3% (−40°C to +85°C) - stable trip-point anchor for precision thresholding without external references. |
| Propagation Delay | 12μs (high-to-low), 300μs (low-to-high) at 10mV overdrive - balances speed and power; low-to-high delay dominated by RC time constant of external pullup. |
| Input Offset Voltage | ±10mV - defines minimum detectable differential voltage; critical for accurate window/level detection near reference. |
| Output Type | Open-drain, sinks to V− - enables wired-OR combining, level translation across domains, and interface with 1.8V–5V logic. |
| Hysteresis Support | Dedicated HYST pin with 0–50mV input range - allows precise, resistor-programmable hysteresis to prevent oscillation in noisy environments. |
Pinout & Package
Package: 8-pin MSOP (TSM982CUA+) per JEDEC MO-187AA; body dimensions 3.0mm × 3.0mm × 0.85mm, 0.65mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference; connect to V− for single-supply operation. |
| 2 | V− | Negative supply rail; sets reference for REF, IN+, IN−, and output sink node. |
| 3 | IN+ | Comparator A noninverting input; accepts signals from V− to (V+ − 1.3V). |
| 4 | IN− | Comparator A inverting input; same voltage range as IN+. |
| 5 | HYST | Hysteresis control input; voltage between REF and (REF − 50mV) sets hysteresis band magnitude. |
| 6 | REF | 1.182V reference output referenced to V−; sources/sinks up to 25μA/15μA. |
| 7 | V+ | Positive supply rail; must be ≥2.5V above V− for guaranteed operation. |
| 8 | OUT | Comparator A open-drain output; sinks current to V− (not GND), requires external pullup. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator + reference | Two independent comparators share one precision 1.182V reference, reducing BOM count and layout area vs discrete solutions. |
| Adjustable hysteresis | HYST pin enables resistor-programmable hysteresis up to 100mV without feedback resistors across output and input. |
| Ultra-low quiescent current | ≤6μA max over full temperature range ensures >10-year battery life in maintenance-free sensor nodes. |
| Wide supply range | Operates from +2.5V to +11V single or ±1.25V to ±5.5V dual - compatible with Li-ion, alkaline, and industrial 5V/12V rails. |
| Input rail-to-rail capability | Inputs function down to V− and up to (V+ − 1.3V), enabling direct sensing of ground-referenced signals without biasing. |
Applications
| Threshold Detector | Window Comparator |
|---|---|
Use Scenario: Monitoring battery voltage to trigger low-battery warning before cutoff. IC Role / Device Role / Timing Role: Dual comparator compares battery voltage against upper (e.g., 4.2V) and lower (e.g., 3.3V) thresholds using resistor dividers and shared REF. Use Value: Eliminates need for external reference IC and reduces total solution size by 30% versus discrete op-amp + reference design. | Use Scenario: Validating regulated 5V supply stays within ±5% tolerance (4.75V–5.25V) in embedded controllers. IC Role / Device Role / Timing Role: TSM982CUA+ implements high- and low-threshold detection with programmable hysteresis to reject noise-induced false trips. Use Value: Achieves <10ms response to out-of-window events while maintaining <1μA standby current during normal operation. |
| Oscillator Circuit | Battery-Powered System |
Use Scenario: Building relaxation oscillator for low-frequency clock generation in energy-harvesting sensors. IC Role / Device Role / Timing Role: One comparator charges capacitor via current source; second comparator discharges it when threshold crossed - hysteresis sets frequency stability. Use Value: Enables sub-1Hz oscillation with <2μA average current, supporting multi-year deployment without battery replacement. | Use Scenario: Enabling wake-up on motion detection in wearable health monitors using piezoelectric sensor output. IC Role / Device Role / Timing Role: TSM982CUA+ detects signal amplitude crossing preset threshold, triggering MCU from deep sleep via open-drain interrupt line. Use Value: Reduces system standby power to <5μA including comparator and pullup, extending coin-cell life beyond 3 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator with reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX982ESA+ | Pin-compatible, identical electrical specs and pinout; ±2% reference, same HYST functionality, same 6μA max current. | No functional difference; designed as direct drop-in replacement per manufacturer documentation. | Select MAX982ESA+ only if legacy MAX-designated BOM compliance is required; identical performance and footprint. |
| TSM973CUA+ | Same package and pinout; differs in reference accuracy (±1% vs ±2%) and temperature coefficient (tighter spec over 0°C–70°C). | Preferred where higher reference precision is needed for narrow window detection; not suitable if ±2% tolerance is acceptable and cost sensitivity exists. | Choose TSM973CUA+ when reference drift must stay below ±10mV across temperature; otherwise TSM982CUA+ offers optimal cost/power tradeoff. |
Compared with MAX982ESA+, TSM982CUA+ provides identical functionality at updated process and packaging; compared with TSM973CUA+, it trades 1% reference accuracy for lower cost and broader ±2% tolerance, making it ideal for cost-sensitive, battery-constrained designs where moderate precision suffices.
Availability
TSM982CUA+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and industrial sensor nodes requiring stable component supply with long-term lifecycle support.
Supply support for TSM982CUA+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Silicon Laboratories is a fabless semiconductor company specializing in low-power, mixed-signal ICs for timing, IoT, and embedded control applications.
The TSM982CUA+ belongs to Silicon Labs' TSM9xx micropower comparator family, designed specifically for ultra-low-power threshold detection and reference-stabilized signal conditioning in space- and energy-constrained systems.
FAQ
What is the operating temperature range for the TSM982CUA+?
The TSM982CUA+ is specified for operation from −40°C to +85°C (industrial grade). Its maximum supply current remains ≤6μA across this full range, and the internal 1.182V reference maintains ±3% accuracy. This makes the TSM982CUA+ suitable for automotive cabin modules, outdoor sensors, and industrial controls exposed to wide ambient swings.
Does the TSM982CUA+ have a GND pin, and how does its output interface work?
No, the TSM982CUA+ does not have a dedicated GND pin. Its output (pin 8) is open-drain and sinks current to V− (pin 2), not to GND. This requires the external pullup resistor to be connected to the desired logic rail (e.g., 3.3V or 5V), enabling level shifting. The TSM982CUA+ shares this V−-referenced output architecture with TSM972 and TSM973, unlike TSM971/TSM984 which include a GND pin.
Can the internal reference of the TSM982CUA+ be used to drive external circuitry?
Yes, the REF pin (pin 6) of the TSM982CUA+ can source up to 25μA and sink up to 15μA while maintaining ±2% accuracy over temperature. It is intended for driving high-impedance inputs such as comparator IN+ pins or ADC reference dividers. Do not bypass REF with capacitors, and avoid routing noisy signals near this pin to prevent crosstalk-induced noise on the reference.
How is hysteresis configured on the TSM982CUA+?
Hysteresis on the TSM982CUA+ is configured using the HYST pin (pin 5), which accepts voltages from REF down to (REF − 50mV). Connecting R1 between REF and HYST, and R2 between HYST and V−, creates programmable hysteresis. With R2 = 2.4MΩ, the hysteresis band (VHB) in mV approximates R1 in kΩ. Full design equations and examples are provided in the official TSM982 datasheet Figure 2.
Is the TSM982CUA+ pin-compatible with the MAX982?
Yes, the TSM982CUA+ is electrically and form-factor identical to the MAX982, including identical 8-pin MSOP package, pinout, supply ranges, reference specs, and hysteresis functionality. Silicon Labs explicitly positions it as an alternate source for MAX982, and no PCB or schematic changes are required when substituting TSM982CUA+ into existing MAX982 designs.
TSM982CUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- TSM98x
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- with Voltage Reference
- Number of Elements:
- 2
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 11V, ±1.25V ~ 5.5V
- :
- 10mV @ 2.5V
- Voltage - Input Offset (Max):
- 0.005µA @ 2.5V
- Current - Input Bias (Max):
- 40mA
- Current - Output (Typ):
- 6µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- 50mV
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-MSOP
TSM982CUA+ FAQ
1.How can I place an order for TSM982CUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for TSM982CUA+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TSM982CUA+ reliable?
The price and inventory of TSM982CUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM982CUA+ is usually 5 days.
3.What payment methods are accepted for TSM982CUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM982CUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSM982CUA+?
TSM982CUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSM982CUA+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TSM982CUA+?
For technical support, including TSM982CUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM982CUA+ requirements.
6.How does Aetrix verify that TSM982CUA+ is sourced from the original manufacturer or authorized distributors?
All TSM982CUA+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TSM982CUA+ meets industry standards.
7.What is the process for return or replacement of TSM982CUA+?
All TSM982CUA+ units undergo pre-shipment inspection (PSI). If there is an issue with TSM982CUA+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TSM982CUA+ part is unused and in its original packaging.
Return procedure for TSM982CUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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