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Analog Devices Inc. LTC1098LCS8#TRPBF
- Part No.:
- LTC1098LCS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1098LCS8#TRPBF.pdf
- Description:
- IC ADC 8BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,605
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Product details
Overview
LTC1098LCS8#TRPBF from Analog Devices (formerly Linear Technology) is a micropower 8-bit successive approximation ADC with integrated sample-and-hold and software-selectable 2-channel analog multiplexer. It operates from 2.65V to 4.0V supply, draws only 88μA at 250kHz clock (33kHz sample rate), powers down to 1nA, and communicates via 4-wire serial interface. It targets battery-powered sensor monitoring in portable instrumentation.
For engineers reviewing the LTC1098LCS8#TRPBF datasheet, LTC1098LCS8#TRPBF pinout, LTC1098LCS8#TRPBF application, or LTC1098LCS8#TRPBF equivalent, key selection criteria include its 2.65V minimum supply, 16.5kHz max sampling rate at 3V, ±1.5LSB total unadjusted error over temperature, and CH0/CH1 channel switching capability - all critical for low-voltage, low-power remote sensing designs.
Technical Context
The LTC1098LCS8#TRPBF implements a switched-capacitor SAR architecture with on-chip sample-and-hold and a 2-channel analog MUX controlled via DIN serial input. Its serial interface operates synchronously with CLK, requiring CS low before data transfer and supporting half-duplex 4-wire communication (CS, CLK, DIN, DOUT).
It features automatic power-down when CS is high, with a guaranteed 10μs wake-up time before first CLK edge after CS assertion. Input channels exhibit 25pF on-channel capacitance and ±1.0μA leakage, enabling direct connection to high-impedance sensors without external buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit with no missing codes - guarantees monotonic output across full scale. |
| Supply Voltage Range | 2.65V to 4.0V - enables operation directly from single Li-ion or two alkaline cells. |
| Max Sampling Rate | 16.5kHz at VCC = 2.65V - supports real-time monitoring of slow-varying physical parameters. |
| Total Unadjusted Error | ±1.5LSB over –40°C to 85°C - ensures consistent accuracy without calibration in industrial environments. |
| Supply Current (Active) | 88μA typical at fCLK = 250kHz - achieves <10μW power consumption at 5V-equivalent scale. |
| Supply Current (Shutdown) | 1nA typical - extends battery life by >1000× during idle periods in intermittent-sampling systems. |
| Analog Input Range | –0.05V to VCC + 0.05V - allows rail-to-rail input with 50mV diode-clamp margin for robustness. |
| Reference Source | VCC used as reference (VCC/VREF pin) - eliminates need for external precision reference in ratiometric sensor applications. |
Pinout & Package
Package: 8-lead plastic SOIC (S8), 3.9mm × 4.9mm, JEDEC MS-012AC, RoHS-compliant, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS/SHDN | Chip Select / Shutdown Control | Active-low enable; high state disconnects internal power, reducing ICC to 1nA. |
| 2: CH0 | Analog Input Channel 0 | High-impedance (25pF) input for single-ended or differential measurement relative to CH1 or GND. |
| 3: CH1 | Analog Input Channel 1 | Identical to CH0; MUX selects CH0 or CH1 based on DIN bit during CS low period. |
| 4: GND | Analog Ground Reference | Must connect directly to low-noise analog ground plane; separates analog and digital return paths. |
| 5: DIN | Serial Data Input | Accepts 1-bit MUX address prior to conversion; required for channel selection in LTC1098L family. |
| 6: DOUT | Serial Data Output | Outputs 8-bit conversion result MSB-first on falling CLK edges; tri-states when CS high. |
| 7: CLK | Serial Shift Clock | Controls timing of DIN sampling and DOUT shifting; min/max frequencies defined per supply voltage. |
| 8: VCC/VREF | Power Supply & Reference Input | Single pin serves both functions; sets full-scale range equal to VCC, enabling ratiometric operation with resistive sensors. |
Key Features
| Feature | Design Value |
|---|---|
| Software-selectable 2-channel MUX | Enables dual-sensor polling (e.g., temperature + voltage) using one serial command, reducing BOM count vs discrete ADCs. |
| Ratiometric operation with VCC/VREF | Eliminates external reference IC and matching drift errors when measuring bridge sensors or potentiometers powered from same supply. |
| 1nA shutdown current | Supports multi-year battery life in wireless sensor nodes with 1-second wakeup intervals and 100μs active time per sample. |
| On-chip sample-and-hold | Removes need for external S/H circuitry; holds input during conversion, enabling accurate sampling of high-source-impedance transducers. |
| 4-wire serial interface | Provides deterministic timing control and channel selection via DIN, simplifying firmware integration versus I²C or SPI peripherals. |
Applications
| Battery Gas Gauge | Portable Temperature Monitor |
|---|---|
Use Scenario: Measuring cell voltage and current sense resistor voltage in handheld medical devices to estimate remaining charge. IC Role / Device Role / Timing Role: Dual-channel ADC samples battery voltage (CH0) and shunt voltage (CH1) sequentially to compute instantaneous load current and SOC. Use Value: 2.65V minimum supply allows direct operation from depleted Li-ion (3.0V nominal), while 1nA shutdown extends shelf life beyond 5 years. | Use Scenario: Logging ambient temperature in wearable fitness trackers using thermistor or digital sensor with analog output. IC Role / Device Role / Timing Role: Converts thermistor voltage (CH0) and reference voltage (CH1) for ratiometric calculation, rejecting supply variation effects. Use Value: VCC-as-reference eliminates external voltage reference, reducing component count and PCB area by 25% in space-constrained wearables. |
| Remote Industrial Sensor Node | Low-Power Data Logger |
Use Scenario: Monitoring pressure and humidity in battery-powered environmental sensors deployed in inaccessible locations. IC Role / Device Role / Timing Role: Alternates between CH0 (pressure transducer) and CH1 (humidity sensor) every 10 seconds, then enters 1nA shutdown until next cycle. Use Value: 88μA active current at 250kHz clock enables full 8-bit conversion in <100μs, minimizing energy per sample and maximizing battery longevity. | Use Scenario: Recording vibration and temperature in predictive maintenance modules mounted on rotating machinery. IC Role / Device Role / Timing Role: Samples accelerometer output (CH0) and thermistor (CH1) at 16.5kHz burst mode, then stores results in local memory before deep sleep. Use Value: 16.5kHz max sampling rate at 2.65V meets Nyquist requirement for 8kHz mechanical resonance detection without oversampling penalty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit micropower ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 2.7V–5.25V supply; 1MSPS max sample rate; SPI-compatible 3-wire interface; no integrated MUX. | Higher speed but higher power (1.2mA active); requires external reference; suited for faster, non-battery-critical systems. | Select when >100ksps sampling or SPI host compatibility is required; not drop-in due to different pinout and interface protocol. |
| MAX11100ETE+ | 2.7V–3.6V supply; 100ksps; internal 2.048V reference; 8-pin TDFN package; no MUX. | Fixed internal reference limits ratiometric flexibility; smaller footprint but no channel selection - requires external MUX for dual inputs. | Choose for space-constrained designs needing guaranteed reference stability; not suitable for VCC-referenced sensor bridges. |
Compared with ADS7822U and MAX11100ETE+, the LTC1098LCS8#TRPBF uniquely combines ultra-low 1nA shutdown, VCC-as-reference ratiometry, and integrated 2-channel MUX in an SOIC-8 - making it optimal for long-life, dual-sensor, battery-operated systems where BOM count and supply headroom are constrained.
Availability
LTC1098LCS8#TRPBF is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition, and isolated data acquisition requiring stable component supply and long-term lifecycle support.
Supply support for LTC1098LCS8#TRPBF 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
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC1098L series belongs to ADI's legacy micropower precision ADC product line, designed specifically for ultra-low-power sensor interfacing in portable, remote, and energy-harvesting applications where supply voltage headroom and quiescent current are primary constraints.
FAQ
What is the minimum supply voltage required for reliable operation of the LTC1098LCS8#TRPBF?
The LTC1098LCS8#TRPBF has a specified minimum supply voltage of 2.65V across the full operating temperature range (0°C to 70°C). Below this threshold, parameters such as total unadjusted error, sampling rate, and digital input thresholds are not guaranteed. Operation at 2.65V enables compatibility with deeply discharged lithium-based batteries and two-cell alkaline stacks without regulation.
Does the LTC1098LCS8#TRPBF require an external voltage reference?
No, the LTC1098LCS8#TRPBF does not require an external voltage reference. Pin 8 (VCC/VREF) serves as both power supply and reference input, enabling true ratiometric operation. When used with resistive sensors powered from the same supply, this architecture inherently rejects supply voltage drift and improves measurement accuracy without added components.
How is channel selection implemented on the LTC1098LCS8#TRPBF?
Channel selection on the LTC1098LCS8#TRPBF is performed via the DIN pin during the CS low period. A single logic level (high = CH0, low = CH1) is shifted in on the first CLK falling edge after CS assertion. This 4-wire interface (CS, CLK, DIN, DOUT) allows deterministic, software-controlled MUX configuration without additional control lines or configuration registers.
What is the guaranteed wake-up time for the LTC1098LCS8#TRPBF after CS activation?
The LTC1098LCS8#TRPBF guarantees a maximum wake-up time of 10μs from CS falling edge to the falling edge of the CLK that clocks the MSB bit. This timing is valid across the full supply range (2.65V to 4.0V) and temperature range (0°C to 70°C), ensuring predictable latency for time-critical sampling sequences in battery-powered systems.
Can the LTC1098LCS8#TRPBF operate with a 5V supply?
No, the LTC1098LCS8#TRPBF is rated for a maximum supply voltage of 4.0V. The 'L' suffix denotes the low-voltage variant (2.65V–4.0V), distinct from the standard LTC1098 (3V–6V). Applying 5V exceeds absolute maximum ratings and may cause permanent damage. For 5V systems, the pin-compatible LTC1098CS8#TRPBF should be selected instead.
LTC1098LCS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 33k
- Number of Inputs:
- 1, 2
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.65V ~ 4V
- Voltage - Supply, Digital:
- 2.65V ~ 4V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1098LCS8#TRPBF FAQ
1.How can I place an order for LTC1098LCS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1098LCS8#TRPBF 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 LTC1098LCS8#TRPBF reliable?
The price and inventory of LTC1098LCS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1098LCS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1098LCS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1098LCS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1098LCS8#TRPBF?
LTC1098LCS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1098LCS8#TRPBF 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 LTC1098LCS8#TRPBF?
For technical support, including LTC1098LCS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1098LCS8#TRPBF requirements.
6.How does Aetrix verify that LTC1098LCS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1098LCS8#TRPBF 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 LTC1098LCS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1098LCS8#TRPBF?
All LTC1098LCS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1098LCS8#TRPBF, 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 LTC1098LCS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1098LCS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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