My Inquiry
My Account
Silicon Labs TSM982CSA+
- Part No.:
- TSM982CSA+
- Manufacturer:
- Silicon Labs
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TSM982CSA+.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,382
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TSM982CSA+ from Silicon Labs 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. It draws ≤6μA max supply current over temperature, features open-drain outputs for wired-OR logic, and supports input common-mode range from V− to V+ − 1.3V - ideal for battery-powered threshold detection in portable instrumentation and power management circuits.
For engineers reviewing the TSM982CSA+ datasheet, TSM982CSA+ pinout, TSM982CSA+ application, or TSM982CSA+ equivalent, key selection criteria include its ultra-low quiescent current, internal reference accuracy and temperature drift, hysteresis configurability via HYST pin, and compatibility with TTL/CMOS logic levels under single-supply operation.
Technical Context
The TSM982CSA+ implements two independent comparators sharing a single precision reference and hysteresis control path. Its open-drain output stage sinks current to V− (not GND), requiring external pull-up resistors for logic-level translation and wired-OR bus interfacing.
It uses a rail-to-rail input architecture with input voltage range extending to the negative supply rail and within 1.3V of the positive rail. Propagation delay is 12μs (high-to-low) at 10mV overdrive, and hysteresis is programmable via external resistor network connected between REF and HYST pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V (single); ±1.25V to ±5.5V (dual) - enables direct use in 3V/5V systems and split-rail sensor interfaces. |
| Max Supply Current | 6μA over −40°C to +85°C - ensures multi-year battery life in always-on monitoring applications. |
| Reference Voltage | 1.182V ±2% over 0°C to +70°C - provides stable trip-point generation without external voltage source. |
| Input Offset Voltage | ±10mV - sets minimum detectable differential signal without calibration. |
| Propagation Delay | 12μs (high-to-low, 10mV overdrive) - supports response-critical window detection up to ~10kHz effective bandwidth. |
| Input Common-Mode Range | V− to V+ − 1.3V - allows direct sensing of signals referenced to negative rails or ground in mixed-supply systems. |
Pinout & Package
Package: 8-pin SOIC (Small Outline Integrated Circuit), JEDEC MS-012 compliant, 3.9mm × 4.9mm body, 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for single-supply operation; tied to V− when using dual supplies. |
| 2 | V− | Negative supply terminal; defines reference for REF, IN+, IN−, and OUT sink path. |
| 3 | IN+ | Noninverting input of Comparator A - accepts signals up to V+ − 1.3V. |
| 4 | IN− | Inverting input of Comparator A - matched offset and leakage with IN+. |
| 5 | HYST | Hysteresis control input; voltage between REF − 50mV and REF sets hysteresis band (up to 100mV). |
| 6 | REF | 1.182V reference output referenced to V−; sources/sinks up to 25μA/15μA. |
| 7 | V+ | Positive supply terminal; supports up to +11V with absolute max rating of +12V. |
| 8 | OUT | Open-drain output of Comparator B - sinks current to V−; requires external pull-up for logic HIGH. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | ≤6μA max over full industrial temperature range - eliminates need for shutdown circuitry in energy-constrained designs. |
| Integrated reference with ±2% accuracy | 1.182V ±2% over 0°C to +70°C - reduces BOM count and layout area versus discrete reference + comparator solutions. |
| Adjustable hysteresis via HYST pin | Configurable 0–100mV hysteresis band using two external resistors - prevents false triggering near threshold without complex feedback networks. |
| Open-drain outputs referenced to V− | Enables level shifting across different supply domains and wired-OR bus configurations - supports interface with 1.8V, 3.3V, or 5V logic. |
| Rail-to-rail input common-mode range | V− to V+ − 1.3V - allows direct connection to sensors, battery terminals, or DAC outputs without level-shifting amplifiers. |
Applications
| Threshold Detector | Window Comparator |
|---|---|
|
Use Scenario: Monitoring lithium-ion battery voltage to trigger low-battery warning at 3.3V and prevent deep discharge below 2.8V. IC Role / Device Role / Timing Role: Dual comparator compares battery voltage against two reference-derived thresholds using shared REF and resistor dividers. Use Value: Eliminates external reference IC and reduces total solution current to <10μA, extending operational time between charges. |
Use Scenario: Validating regulated 5V supply in embedded controller by detecting undervoltage (<4.75V) and overvoltage (>5.25V) conditions. IC Role / Device Role / Timing Role: TSM982CSA+ implements both thresholds with adjustable hysteresis on each comparator to suppress noise-induced chatter. Use Value: Achieves ±5mV hysteresis at input with only two 1% resistors per channel - no trimming or calibration required. |
| Battery Switchover Control | Level Translator |
|
Use Scenario: Seamless transition from wall adapter to backup coin-cell battery in medical wearable devices during AC loss. IC Role / Device Role / Timing Role: One comparator monitors main supply; output drives gate of P-MOSFET to enable battery path when main drops below 4.0V. Use Value: Sub-6μA supply current ensures switchover circuit consumes negligible power - critical for >1-year shelf life. |
Use Scenario: Converting ±5V op-amp sensor output to 3.3V logic-compatible signal for microcontroller ADC input. IC Role / Device Role / Timing Role: Comparator acts as zero-crossing detector with REF biased to 1.182V; open-drain output pulled to 3.3V. Use Value: Input common-mode range includes negative rail, enabling direct bipolar signal comparison without level-shifting amplifiers. |
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 |
|---|---|---|---|
| MAX982CSA+ | Pin- and function-compatible alternate from Maxim Integrated; identical electrical specs and pinout. | No functional difference; validated drop-in replacement per Silicon Labs documentation. | Select MAX982CSA+ only if legacy sourcing or dual-sourcing strategy requires second-source availability. |
| TSM973CSA+ | Same package and pinout, but ±1% reference accuracy and lower hysteresis input leakage (±0.01nA vs ±0.02nA). | Better reference stability suits precision threshold applications; higher cost and tighter tolerance may be unnecessary for general-purpose detection. | Choose TSM973CSA+ when reference accuracy dominates system error budget - e.g., calibrated sensor interfaces. |
Compared with TSM982CSA+, MAX982CSA+ offers identical performance and mechanical fit with no design change required, while TSM973CSA+ trades ±2% reference tolerance for ±1% at marginally higher supply current - making it preferable only where reference drift directly impacts measurement validity.
Availability
TSM982CSA+ is available at Aetrix Electronics and suitable for battery-powered systems, power supply monitoring, and portable instrumentation requiring stable component supply with guaranteed long-term continuity.
Supply support for TSM982CSA+ 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 Labs is a fabless semiconductor company specializing in low-power, mixed-signal ICs for timing, MCU, wireless, and sensor applications.
The TSM982CSA+ belongs to Silicon Labs' TSM9xx micropower comparator family, designed specifically for energy-sensitive applications where supply current, reference stability, and small footprint are primary constraints.
FAQ
What is the maximum operating supply voltage for TSM982CSA+?
The TSM982CSA+ supports a maximum supply voltage of +12V between V+ and V−, with absolute maximum ratings specifying −0.3V to +12V on all supply and input pins. Continuous operation is rated from +2.5V to +11V for single-supply use and ±1.25V to ±5.5V for dual-supply configurations. Exceeding +11V in normal operation risks reliability degradation despite the +12V absolute limit.
Does TSM982CSA+ have a ground pin separate from V−?
No, the TSM982CSA+ does not include a dedicated GND pin. Pin 1 is labeled GND but functions as the ground reference for single-supply operation and must be connected to V−. Unlike TSM971 or TSM984, TSM982CSA+ outputs sink current to V−, not GND - confirming its output stage is referenced to the negative supply rail, not earth or system ground.
Can the internal reference of TSM982CSA+ be used to bias external circuitry?
Yes, the REF pin of TSM982CSA+ can source up to 25μA and sink up to 15μA while maintaining ±2% accuracy over 0°C to +70°C. It is intended for driving high-impedance nodes such as resistor dividers or comparator inputs. Loading beyond these limits will cause reference voltage droop and increased temperature drift - verified in Electrical Characteristics tables on pages 5–6 of the datasheet.
How is hysteresis configured on TSM982CSA+?
Hysteresis on TSM982CSA+ is configured using the HYST pin (Pin 5) with two external resistors: R1 between REF and HYST, and R2 between HYST and V−. The hysteresis band (VHB) is calculated as VHB = 2 × (VREF − VHYST). Maximum VHB is 100mV, achieved when VHYST = REF − 50mV. Full design equations and example values are provided in the Applications Information section of the TSM982CSA+ datasheet.
Is TSM982CSA+ compatible with 1.8V logic systems?
Yes, TSM982CSA+ supports interoperability with 1.8V logic through its open-drain outputs. When V+ = 1.8V and V− = 0V, the device operates within its 2.5V minimum supply specification only if a charge pump or boosted rail is used - however, the output can be pulled up to 1.8V externally regardless of V+, enabling clean level translation. This capability is confirmed by the "Level Shifter" typical application on page 15.
TSM982CSA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
TSM982CSA+ FAQ
1.How can I place an order for TSM982CSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for TSM982CSA+ 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+ reliable?
The price and inventory of TSM982CSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM982CSA+ is usually 5 days.
3.What payment methods are accepted for TSM982CSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM982CSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSM982CSA+?
TSM982CSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSM982CSA+ 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+?
For technical support, including TSM982CSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM982CSA+ requirements.
6.How does Aetrix verify that TSM982CSA+ is sourced from the original manufacturer or authorized distributors?
All TSM982CSA+ 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+ meets industry standards.
7.What is the process for return or replacement of TSM982CSA+?
All TSM982CSA+ units undergo pre-shipment inspection (PSI). If there is an issue with TSM982CSA+, 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+ part is unused and in its original packaging.
Return procedure for TSM982CSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TSM982CSA+ Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
