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Analog Devices Inc. LTC1098LIS8#TRPBF
- Part No.:
- LTC1098LIS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1098LIS8#TRPBF.pdf
- Description:
- IC ADC 8BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,045
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Product details
Overview
LTC1098LIS8#TRPBF from Analog Devices (formerly Linear Technology) is a micropower 8-bit successive approximation analog-to-digital converter with integrated sample-and-hold and software-selectable dual-channel multiplexer. It operates from 2.65V to 4.0V supply, draws only 88μA at 250kHz clock (33kHz sample rate), and powers down to 1nA typical when idle. It interfaces via 4-wire serial I/O (CS/SHDN, DIN, DOUT, CLK) and targets battery-powered sensor monitoring systems requiring low quiescent current and direct transducer interfacing.
For engineers reviewing the LTC1098LIS8#TRPBF datasheet, LTC1098LIS8#TRPBF pinout, LTC1098LIS8#TRPBF application, or LTC1098LIS8#TRPBF equivalent, key selection criteria include its 2.65V minimum supply voltage, 8-pin SOIC package, ±1.0 LSB total unadjusted error over –40°C to +85°C, 2-channel MUX capability, and shutdown wake-up timing compatibility with microcontroller GPIO-driven serial protocols.
Technical Context
The LTC1098LIS8#TRPBF implements a switched-capacitor SAR architecture with on-chip sample-and-hold, enabling accurate conversion of high-impedance sensor signals without external buffering. Its 4-wire serial interface uses CS/SHDN for power control, DIN for channel selection (CH0/CH1), DOUT for result output, and CLK for synchronous bit transfer - all compatible with standard microcontroller GPIOs.
It supports ratiometric operation using VCC as reference (pin 8 labeled VCC/VREF), eliminating need for external precision reference in many applications. The device achieves ±1.5 LSB total unadjusted error at 2.65V/2.5V conditions and maintains 16.5kHz maximum sampling frequency under 3V operation, with 8-clock-cycle conversion time and 10μs wake-up latency after CS assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit with no missing codes - guarantees monotonicity and full code coverage for reliable digital representation of analog inputs. |
| Supply Voltage Range | 2.65V to 4.0V - enables direct operation from single-cell Li-ion or two-cell alkaline batteries without regulation. |
| Max Sampling Rate | 16.5kHz at 2.65V - supports real-time monitoring of slow-varying physical parameters like temperature or pressure. |
| Total Unadjusted Error | ±1.5 LSB at VCC = 2.65V, VREF = 2.5V - defines worst-case deviation from ideal transfer curve across full temperature range. |
| Supply Current (Active) | 88μA at fCLK = 250kHz - enables multi-year battery life in intermittent-sampling applications such as remote gas gauges. |
| Supply Current (Shutdown) | 1nA typical - reduces standby power to negligible levels during extended sleep intervals between measurements. |
| Conversion Time | 8 clock cycles - ensures deterministic timing for time-critical firmware scheduling and interrupt handling. |
| Analog Input Structure | Software-selectable 2-channel single-ended MUX (CH0, CH1) - allows sequential measurement of two independent sensors with shared ADC resources. |
Pinout & Package
Package: 8-lead plastic SOIC (S8), –40°C to +85°C operating temperature range, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS/SHDN | Chip Select / Shutdown Control | Active-low enable; logic high disconnects internal power rails, reducing ICC to 1nA - used for precise power gating by host MCU. |
| 2: CH0 | Analog Input Channel 0 | High-impedance single-ended input; accepts 0V to VCC range - directly connects to voltage-output sensors without gain stages. |
| 3: CH1 | Analog Input Channel 1 | High-impedance single-ended input; identical electrical specs to CH0 - enables dual-sensor polling with one ADC. |
| 4: GND | Analog Ground Reference | Must connect directly to clean analog ground plane; separates noise-sensitive analog circuitry from digital return paths. |
| 5: DIN | Serial Data Input | Receives 1-bit MUX address (0 = CH0, 1 = CH1) before conversion - enables dynamic channel selection per sample cycle. |
| 6: DOUT | Serial Data Output | Outputs 8-bit conversion result MSB-first on falling CLK edges - requires host to sample on rising CLK for reliable capture. |
| 7: CLK | Serial Shift Clock | Asynchronous master clock up to 250kHz at 2.65V - controls timing of both DIN setup and DOUT output transitions. |
| 8: VCC/VREF | Power Supply & Reference Input | Single pin serves dual role: powers internal circuitry and sets full-scale range - simplifies layout but couples reference accuracy to supply stability. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 88μA active current at 250kHz clock enables >5-year battery life in 1Hz-sampled IoT nodes using CR2032 cells. |
| Integrated Sample-and-Hold | Eliminates need for external S/H circuitry when measuring high-source-impedance transducers (<10kΩ). |
| Software-Selectable Dual-Channel MUX | Reduces BOM count and PCB area versus two single-channel ADCs while supporting time-multiplexed sensing. |
| Single-Supply Ratiometric Reference | VCC-as-VREF operation removes dependency on external voltage references, lowering system cost and component count. |
| Low-Voltage Compatibility | 2.65V minimum supply allows direct use with aging primary batteries or energy-harvesting sources without boost converters. |
| 1nA Shutdown Current | Enables ultra-low-power sleep modes in portable medical devices where leakage must be minimized over months of storage. |
Applications
| Battery Gas Gauging | Temperature Monitoring |
|---|---|
Use Scenario: Measuring cell voltage and current-sense resistor voltage in lithium-ion battery packs to estimate state-of-charge. IC Role / Device Role / Timing Role: Dual-channel ADC sequentially samples voltage and current with 16.5kHz max rate and 10μs wake-up latency. Use Value: Enables accurate coulomb counting using a single IC instead of separate voltage/current ADCs, reducing footprint and power budget. |
Use Scenario: Reading thermistor or RTD outputs in wearable health monitors and industrial sensor nodes. IC Role / Device Role / Timing Role: Converts high-impedance analog temperature signals with integrated sample-and-hold, eliminating external op-amp buffers. Use Value: Achieves <1mV resolution at reduced spans (e.g., 1V full scale), supporting ±0.5°C accuracy without calibration. |
| Remote Data Acquisition | Isolated Data Acquisition |
Use Scenario: Collecting environmental data (humidity, light, motion) in solar-powered field sensors transmitting via LoRaWAN. IC Role / Device Role / Timing Role: Provides low-quiescent-current analog front-end with 1nA shutdown mode synchronized to radio transmit windows. Use Value: Extends operational lifetime beyond 10 years by minimizing average current draw during long idle periods between transmissions. |
Use Scenario: Digitizing analog signals across galvanic isolation barriers in motor drives or medical equipment. IC Role / Device Role / Timing Role: Interfaces directly to isolated SPI isolators via 4-wire serial protocol, avoiding level-shifting complexity. Use Value: Reduces component count and board space versus isolated ADCs with integrated transformers or capacitive isolators. |
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 and wider voltage range, but lacks dual-channel MUX and consumes 1.2mA active current - unsuitable for sub-100μA systems. | Select ADS7822U only if higher throughput is required and power budget allows >10× higher ICC. |
| MAX11100ETE+ | 2.7V–3.6V supply, 500ksps, 12-bit resolution, internal reference, SPI interface, no MUX. | Higher resolution and integrated 2.048V reference, but 350μA active current and no channel selection - trades power efficiency for precision. | Choose MAX11100ETE+ when 12-bit accuracy is mandatory and dual-channel functionality is implemented externally. |
Compared with ADS7822U and MAX11100ETE+, the LTC1098LIS8#TRPBF delivers optimal balance of ultra-low power (88μA), dual-channel flexibility, and minimal external components - making it uniquely suited for long-life, space-constrained battery-operated systems where 8-bit resolution suffices.
Availability
LTC1098LIS8#TRPBF is available at Aetrix Electronics and suitable for battery gas gauging, temperature monitoring, and remote data acquisition requiring stable component supply across automotive, industrial, and medical OEM programs.
Supply support for LTC1098LIS8#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 energy-constrained applications including portable instrumentation, sensor networks, and battery management systems.
FAQ
What is the minimum supply voltage required for reliable operation of the LTC1098LIS8#TRPBF?
The LTC1098LIS8#TRPBF specifies a minimum supply voltage of 2.65V across its full operating temperature range (–40°C to +85°C). Below this threshold, timing margins degrade and conversion accuracy is not guaranteed. At 2.65V, it supports up to 250kHz clock frequency and 16.5kHz sampling rate, maintaining ±1.5 LSB total unadjusted error.
How does the LTC1098LIS8#TRPBF handle channel selection during conversion?
The LTC1098LIS8#TRPBF uses the DIN pin to accept a 1-bit address prior to conversion initiation: logic low selects CH0, logic high selects CH1. This occurs during the first clock cycle after CS assertion, before the 8-bit conversion sequence begins on DOUT. The MUX is software-controlled and does not require configuration registers.
Can the LTC1098LIS8#TRPBF operate without an external reference voltage?
Yes - the LTC1098LIS8#TRPBF uses pin 8 (VCC/VREF) as both power supply and reference input. When VCC is stable and ripple-free, it provides ratiometric conversion where full-scale equals VCC. This eliminates external reference components but ties measurement accuracy directly to supply regulation quality.
What is the wake-up timing requirement after asserting CS/SHDN on the LTC1098LIS8#TRPBF?
The LTC1098LIS8#TRPBF requires a 10μs delay between CS falling edge and the falling edge of the first CLK that clocks the MSB bit. This wake-up interval ensures internal biasing and sample-and-hold settling. If CLK frequency ≤100kHz, the natural clock period inherently satisfies this requirement without added firmware delay.
Does the LTC1098LIS8#TRPBF support differential input measurements?
No - the LTC1098LIS8#TRPBF implements two independent single-ended analog inputs (CH0 and CH1), each referenced to GND. For differential measurements, users must condition signals externally (e.g., with an instrumentation amplifier) before applying them to either channel. The LTC1096/LTC1096L variants provide true differential input capability.
LTC1098LIS8#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1098LIS8#TRPBF FAQ
1.How can I place an order for LTC1098LIS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1098LIS8#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 LTC1098LIS8#TRPBF reliable?
The price and inventory of LTC1098LIS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1098LIS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1098LIS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1098LIS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1098LIS8#TRPBF?
LTC1098LIS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1098LIS8#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 LTC1098LIS8#TRPBF?
For technical support, including LTC1098LIS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1098LIS8#TRPBF requirements.
6.How does Aetrix verify that LTC1098LIS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1098LIS8#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 LTC1098LIS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1098LIS8#TRPBF?
All LTC1098LIS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1098LIS8#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 LTC1098LIS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1098LIS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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