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Silicon Labs TSM982CSA+T
- Part No.:
- TSM982CSA+T
- Manufacturer:
- Silicon Labs
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TSM982CSA+T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,105
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Product details
Overview
TSM982CSA+T from Silicon Laboratories is a dual-channel, micropower analog comparator with integrated 1.182V ±2% reference and adjustable hysteresis, operating from single +2.5V to +11V or dual ±1.25V to ±5.5V supplies, consuming ≤6μA max over temperature, and featuring open-drain outputs for wired-OR logic in battery-powered threshold detection systems.
For engineers reviewing the TSM982CSA+T datasheet, TSM982CSA+T pinout, TSM982CSA+T application, or TSM982CSA+T equivalent, key selection criteria include ultra-low quiescent current (≤6μA), internal reference accuracy (±2% over –40°C to +85°C), 12μs propagation delay at 10mV overdrive, input common-mode range extending to V–, and compatibility with MAX982 as an alternate source.
Technical Context
The TSM982CSA+T implements two independent comparators sharing a single internal 1.182V reference and a dedicated HYST pin for externally programmable hysteresis via two resistors. Its open-drain output stage sinks current to V–, not GND, distinguishing it from TSM971/TSM984 which feature separate GND pins.
It supports rail-to-rail input operation down to V– and within 1.3V of V+, enabling direct sensing near ground in single-supply systems. The reference is buffered and capable of sourcing up to 25μA or sinking 15μA, with voltage noise of 100μVRMS (100Hz–100kHz), and is referenced strictly to V–.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V (single) or ±1.25V to ±5.5V (dual); enables flexible power architecture in portable and industrial sensors. |
| Max Supply Current | 6μA over –40°C to +85°C; ensures multi-year battery life in always-on monitoring nodes. |
| Reference Voltage | 1.182V ±2% over –40°C to +85°C; provides stable trip-point generation without external precision references. |
| Propagation Delay | 12μs at 10mV overdrive; supports fast response in overvoltage/undervoltage protection circuits. |
| Input Common-Mode Range | V– to (V+ – 1.3V); allows direct interface to low-side current-sense amplifiers or battery terminals. |
| Output Type | Open-drain, sinks to V–; enables wired-OR logic, level translation, and pull-up to arbitrary voltage rails. |
| Hysteresis Support | Adjustable via HYST pin (REF to REF–50mV); eliminates oscillation in noisy threshold detection without external op-amps. |
Pinout & Package
8-pin SOIC package (JEDEC MS-012 compliant), 3.9mm × 4.9mm body, 1.27mm pitch, lead-free, RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference; tied to V– in single-supply operation; required for internal biasing and ESD protection. |
| 2 | V– | Negative supply terminal; defines reference for REF, IN+, IN–, and OUT; output sinks to this node. |
| 3 | IN+ | Comparator A noninverting input; accepts voltages from V– to (V+ – 1.3V); high-impedance (±0.01nA leakage). |
| 4 | IN– | Comparator A inverting input; identical electrical specs to IN+; used for differential or single-ended threshold comparison. |
| 5 | HYST | Hysteresis control input; accepts 0V to (REF – 50mV); sets hysteresis band up to 100mV via external resistor divider. |
| 6 | REF | 1.182V reference output referenced to V–; sources/sinks up to 25μA/15μA; must not be bypassed. |
| 7 | V+ | Positive supply terminal; supports up to +11V; determines upper common-mode limit and output swing ceiling. |
| 8 | OUT | Comparator A open-drain output; sinks current to V–; requires external pull-up for logic-level translation or wired-OR. |
Key Features
| Feature | Design Value |
|---|---|
| Dual comparator + reference in one SOIC-8 | Reduces BOM count and PCB area vs. discrete reference + dual comparator solutions; eliminates matching drift between channels. |
| Ultra-low 6μA max supply current | Enables >10-year operation on coin-cell batteries in IoT endpoint sensors without duty-cycling compromises. |
| Programmable hysteresis via HYST pin | Eliminates need for external feedback networks or op-amp-based hysteresis generators; simplifies layout and improves reliability. |
| Input range includes V– rail | Supports direct connection to shunt resistors, thermistors, or battery cathodes without level-shifting circuitry. |
| Open-drain outputs referenced to V– | Allows output pull-up to any voltage ≤V+, enabling seamless interfacing with 1.8V, 3.3V, or 5V logic families. |
Applications
| Threshold Detector | Window Comparator |
|---|---|
|
Use Scenario: Monitoring lithium-ion battery voltage to trigger undervoltage lockout at 3.0V and overvoltage shutdown at 4.3V. IC Role / Device Role / Timing Role: Dual comparator compares battery voltage against two independently set thresholds using shared REF and resistor dividers. Use Value: Eliminates external voltage references and reduces component count by 40% versus discrete comparator + reference designs. |
Use Scenario: Validating 5V system rail integrity in industrial PLC I/O modules with ±50mV hysteresis to reject noise-induced chatter. IC Role / Device Role / Timing Role: TSM982CSA+T implements both upper and lower trip points using its two comparators and single REF, with HYST pin enabling precise hysteresis tuning. Use Value: Achieves <12μs response to rail collapse while maintaining stable "power-good" assertion under EMI-rich factory environments. |
| Oscillator Circuit | Battery-Powered System |
|
Use Scenario: Building a relaxation oscillator for LED blink timing in a solar-charged garden light. IC Role / Device Role / Timing Role: One comparator acts as threshold detector charging/discharging a capacitor through REF and HYST-controlled hysteresis band. Use Value: Generates stable frequency with <±2% variation over temperature using only TSM982CSA+T, one cap, and two resistors-no crystal or RC timer IC needed. |
Use Scenario: Low-power wake-up controller in a wireless sensor node that activates MCU only when ambient light exceeds 10 lux. IC Role / Device Role / Timing Role: Single comparator channel monitors photodiode amplifier output against REF-derived threshold; second channel reserved for fault detection. Use Value: Draws just 6μA continuously while providing deterministic wake-up latency (<15μs), extending shelf life beyond 5 years on CR2032. |
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, same 1.182V ±2% reference, identical HYST functionality, but higher max supply current (8μA vs. 6μA). | Suitable for legacy designs migrating from Maxim; no PCB changes required if footprint and thermal constraints match. | Select MAX982ESA+ only when existing design validation data exists for that part; otherwise prefer TSM982CSA+T for lower current draw. |
| TSM973CSA+T | Same package and pinout, but features ±1% reference (tighter tolerance) and no HYST pin-hysteresis requires external feedback. | Better for precision thresholding where reference accuracy dominates over hysteresis flexibility; not suitable for HYST-based designs. | Choose TSM973CSA+T when reference stability is critical and hysteresis can be implemented externally; avoid if HYST pin usage is required. |
Compared with MAX982ESA+, TSM982CSA+T delivers 25% lower quiescent current without sacrificing functionality; compared with TSM973CSA+T, it trades ±1% reference accuracy for integrated hysteresis control-enabling simpler, more robust noise immunity in cost-sensitive battery systems.
Availability
TSM982CSA+T is available at Aetrix Electronics and suitable for battery-powered sensors, industrial voltage monitors, and portable medical devices requiring stable component supply with long-term lifecycle assurance.
Supply support for TSM982CSA+T 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, MCU, wireless, and sensor applications.
The TSM982CSA+T belongs to Silicon Labs' TSM9xx micropower comparator family, designed specifically for energy-constrained systems needing precision threshold detection without external references or complex support circuitry.
FAQ
What is the maximum operating temperature range for the TSM982CSA+T?
The TSM982CSA+T is rated for operation from –40°C to +85°C. This extended industrial temperature range is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics sections of the official datasheet, ensuring reliable performance in outdoor sensors, automotive body electronics, and factory automation equipment where ambient temperatures fluctuate widely. The TSM982CSA+T maintains its 6μA max supply current and 1.182V ±2% reference accuracy across this full range.
Does the TSM982CSA+T have a GND pin for single-supply operation?
No, the TSM982CSA+T does not have a dedicated GND pin. Pin 1 is labeled GND in the pin function table, but its role is to serve as the substrate ground and internal bias reference-not as an output return path. All outputs sink to V– (Pin 2), and for single-supply use, V– must be connected to system ground. This differs from TSM971/TSM984, which include separate GND and V– pins allowing true dual-supply operation.
Can the internal reference of the TSM982CSA+T be used to drive external circuitry?
Yes, the REF pin (Pin 6) of the TSM982CSA+T can source up to 25μA and sink up to 15μA while maintaining its 1.182V ±2% accuracy over temperature. It is explicitly designed to drive external resistor dividers for threshold setting or hysteresis programming. However, the datasheet cautions against bypassing REF with capacitors, as this may destabilize the reference and increase noise-external loading must remain within the specified current limits.
How is hysteresis implemented on the TSM982CSA+T?
Hysteresis on the TSM982CSA+T is implemented via the HYST pin (Pin 5), which accepts a voltage from REF down to (REF – 50mV). Connecting two external resistors between REF, HYST, and V– creates a feedback network that shifts the comparator's trip points. The resulting hysteresis band is directly proportional to the voltage difference across REF and HYST, enabling precise, resistor-programmable hysteresis up to 100mV without requiring additional op-amps or complex feedback paths.
Is the TSM982CSA+T pin-compatible with the MAX982?
Yes, the TSM982CSA+T is electrically and form-factor identical to the MAX982, as explicitly stated in the device description: "The TSM971/972/973/982/984 family [...] is electrically and form-factor identical to the MAX971/972/973/982/984 family." Both are offered in 8-pin SOIC and MSOP packages with identical pinouts, making TSM982CSA+T a drop-in replacement for MAX982 in existing designs, subject to qualification per application requirements.
TSM982CSA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- TSM98x
- Packaging:
- Tape & Reel (TR)
- 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-SOIC
TSM982CSA+T FAQ
1.How can I place an order for TSM982CSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for TSM982CSA+T 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 TSM982CSA+T reliable?
The price and inventory of TSM982CSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM982CSA+T is usually 5 days.
3.What payment methods are accepted for TSM982CSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM982CSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSM982CSA+T?
TSM982CSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSM982CSA+T 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 TSM982CSA+T?
For technical support, including TSM982CSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM982CSA+T requirements.
6.How does Aetrix verify that TSM982CSA+T is sourced from the original manufacturer or authorized distributors?
All TSM982CSA+T 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 TSM982CSA+T meets industry standards.
7.What is the process for return or replacement of TSM982CSA+T?
All TSM982CSA+T units undergo pre-shipment inspection (PSI). If there is an issue with TSM982CSA+T, 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 TSM982CSA+T part is unused and in its original packaging.
Return procedure for TSM982CSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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