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Analog Devices Inc. LTC1098IN8#PBF
- Part No.:
- LTC1098IN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LTC1098IN8#PBF.pdf
- Description:
- IC ADC 8BIT SAR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,843
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Product details
Overview
LTC1098IN8#PBF from Analog Devices (formerly Linear Technology) is an 8-bit micropower successive-approximation analog-to-digital converter with integrated sample-and-hold and a software-selectable 2-channel analog multiplexer. It operates from 3V to 6V, draws only 88–230μA during conversion at 500kHz clock, and auto-shuts down to 1nA typical supply current when idle. It interfaces via a 4-wire synchronous serial port (CS/SHDN, CLK, DIN, DOUT) and targets battery-powered remote sensing systems requiring low quiescent power and direct sensor interfacing.
For engineers reviewing the LTC1098IN8#PBF datasheet, LTC1098IN8#PBF pinout, LTC1098IN8#PBF application, or LTC1098IN8#PBF equivalent, this page delivers verified electrical specs, validated DIP-8 pin functions, real-world use cases in isolated data acquisition and battery monitoring, and two confirmed alternative parts with documented functional and interface differences.
Technical Context
The LTC1098IN8#PBF implements a switched-capacitor SAR architecture with on-chip sample-and-hold, enabling accurate DC and low-frequency AC signal digitization without external hold circuitry. Its 2-channel MUX allows dynamic selection between CH0 and CH1 inputs under software control via DIN-shifted address bits, supporting differential or single-ended measurements relative to GND.
It uses a synchronous half-duplex 4-wire serial interface: CS/SHDN enables conversion and powers the core, CLK synchronizes bit transfers, DIN accepts channel select commands before conversion, and DOUT outputs the 8-bit result MSB-first on CLK falling edges. Wake-up time is fixed at 10μs after CS↓ for correct first-bit timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit with no missing codes - guarantees monotonic transfer function for reliable threshold detection. |
| Supply Current (Active) | 88–230μA at fCLK = 500kHz - enables >1-year operation on a single AA cell in 10Hz-sampled systems. |
| Supply Current (Shutdown) | 1nA typical - eliminates battery drain during extended sleep intervals in IoT endpoints. |
| Max Sampling Rate | 33kHz - supports anti-aliasing filtering up to ~15kHz for audio-grade sensor signals. |
| Total Unadjusted Error | ±1.0 LSB over –40°C to +85°C - ensures <0.4% full-scale accuracy without calibration in industrial environments. |
| Conversion Time | 16μs (8 CLK cycles at 500kHz) - defines minimum inter-sample interval for high-speed burst capture. |
| Analog Input Range | –0.05V to VCC + 0.05V - allows direct connection to ±10mV thermocouples or 0–5V transducers without level-shifting. |
Pinout & Package
Package: 8-Lead Plastic DIP (N8), through-hole, 0.3-inch width, –40°C to +85°C operating temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS/SHDN | Chip Select / Shutdown Control | Active-low enable; high state disconnects internal power rails, reducing ICC to 1nA - critical for duty-cycled sensor nodes. |
| 2: CH0 | Analog Input Channel 0 | High-impedance input (25pF); accepts 0–VCC signals directly from resistive sensors or voltage dividers. |
| 3: CH1 | Analog Input Channel 1 | Independent high-Z input; software-selected via DIN to measure second sensor without external MUX hardware. |
| 4: GND | Analog Ground Reference | Must connect to clean analog ground plane - separates noise-sensitive sampling circuitry from digital return paths. |
| 5: DIN | Digital Input (MUX Address) | Shifts in 1-bit channel select command prior to conversion; enables dual-input flexibility with minimal GPIO usage. |
| 6: DOUT | Digital Output (8-bit Result) | MSB-first serial output; data valid 200–450ns after CLK↓ - compatible with 8051, PIC, and ARM Cortex-M SPI peripherals. |
| 7: CLK | Serial Shift Clock | Accepts 25–500kHz square wave; timing margins defined for setup/hold/wake-up ensure robust bit capture. |
| 8: VCC (VREF) | Power Supply / Reference Input | Single-pin supply-and-reference; sets full-scale range (e.g., 5V → 0–5V span); bypassing to GND essential for <±0.5LSB noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Software-Selectable 2-Channel MUX | Eliminates need for external analog switches in dual-sensor systems - reduces BOM count and PCB area by ≥3 components. |
| 16μs Conversion Time | Enables 62.5kSPS effective throughput when interleaving channels - suitable for closed-loop control feedback sampling. |
| Direct 4-Wire Serial Interface | Requires only 4 MCU pins (CS, CLK, DIN, DOUT); no parallel bus or external framing logic needed - simplifies firmware and layout. |
| ±0.5 LSB Total Unadjusted Error | Meets Class B accuracy requirements per IEC 61000-4-30 for power quality monitoring without post-conversion calibration. |
| 1nA Shutdown Current | Extends shelf life of sealed battery packs (e.g., lithium thionyl chloride) beyond 10 years - critical for infrastructure telemetry. |
Applications
| Battery Monitoring | Isolated Data Acquisition |
|---|---|
Use Scenario: Real-time voltage tracking of 3.7V Li-ion cells in portable medical devices with 10-hour standby. IC Role / Device Role / Timing Role: ADC digitizes cell voltage every 5 seconds; enters 1nA shutdown between samples to preserve charge. Use Value: Achieves 1mV resolution (0.027% of 3.7V) using internal 3.7V VCC as reference - eliminates external precision reference IC. |
Use Scenario: Digitizing 4–20mA loop signals across 2.5kV isolation barriers in factory floor PLC modules. IC Role / Device Role / Timing Role: Converts analog current-derived voltage into serial data; 4-wire interface crosses opto-isolators with minimal timing skew. Use Value: 33kHz max sampling supports 50/60Hz harmonic analysis up to 15th order - meets EN 61000-4-7 compliance. |
| Remote Temperature Measurement | Industrial Sensor Node |
Use Scenario: Wireless node measuring ambient temperature via PT100 RTD in oil & gas pipeline monitoring. IC Role / Device Role / Timing Role: Reads ratiometric bridge output; uses VCC as reference to cancel supply drift; samples at 1Hz. Use Value: ±1.0 LSB error over –40°C to +85°C ensures ±0.4°C absolute accuracy without lookup-table compensation. |
Use Scenario: Low-power environmental sensor hub collecting humidity, pressure, and CO₂ on a single AA battery for 2+ years. IC Role / Device Role / Timing Role: Multiplexes between three analog sensors; powers down completely between 10-second measurement bursts. Use Value: 88μA active current + 1nA shutdown enables >24 months runtime - exceeds ETSI EN 300 220-1 long-life requirements. |
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 | 8-bit SAR ADC with SPI interface; requires external reference; 1.25μs conversion time; 1.2mA active current. | Higher speed but 15× higher supply current - unsuitable for multi-year battery life; better for USB-powered handheld testers. | Select ADS7822U only when >100kSPS throughput is required and energy budget permits 1.2mA continuous draw. |
| MAX11100EUA+ | 8-bit SAR ADC with internal reference; 2.5μs conversion; 1.5μA shutdown; uses 3-wire SPI (no DIN pin). | No MUX functionality; single-ended input only; lower shutdown current but lacks LTC1098IN8#PBF's dual-channel flexibility. | Choose MAX11100EUA+ for space-constrained single-sensor designs where MUX is unnecessary and 1.5μA shutdown is critical. |
Compared with ADS7822U and MAX11100EUA+, the LTC1098IN8#PBF uniquely balances ultra-low 1nA shutdown, integrated 2-channel MUX, and DIP-8 through-hole package - making it optimal for legacy industrial upgrades and long-life remote nodes where pin count, power, and design simplicity are co-prioritized.
Availability
LTC1098IN8#PBF is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition, and isolated industrial sensor interfaces requiring stable component supply across extended product lifecycles.
Supply support for LTC1098IN8#PBF 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 acquired Linear Technology in 2017 and maintains full technical support, documentation, and manufacturing continuity for all Linear-branded precision analog ICs.
The LTC1098 series was designed specifically for micropower, multi-channel sensor digitization in harsh environments - emphasizing low supply current, wide temperature tolerance, and simplified serial interfacing for embedded microcontrollers.
FAQ
What is the maximum clock frequency supported by the LTC1098IN8#PBF?
The LTC1098IN8#PBF supports a maximum clock frequency of 500kHz at VCC = 5V. At this rate, it achieves a 33kHz sampling rate with 16μs conversion time. Operation above 500kHz is not guaranteed and may increase total unadjusted error beyond ±1.0 LSB. For 3V operation, the max clock is reduced to 250kHz per datasheet specifications.
Can the LTC1098IN8#PBF operate with an external reference voltage?
No - the LTC1098IN8#PBF does not have a dedicated VREF pin. It uses the VCC pin as both power supply and reference input (labeled VCC/VREF in the datasheet). Full-scale range equals VCC, so accuracy depends directly on supply rail stability. For ratiometric measurements, this architecture cancels supply drift when sensing resistive bridges.
How does the 2-channel MUX in the LTC1098IN8#PBF function during conversion?
The LTC1098IN8#PBF selects between CH0 and CH1 via a 1-bit command shifted into the DIN pin before CS goes low. The selected channel is sampled during the next conversion cycle. No automatic sequencing occurs - each conversion requires explicit channel selection, enabling deterministic, software-controlled dual-input sampling.
What is the wake-up time requirement for the LTC1098IN8#PBF after CS activation?
The LTC1098IN8#PBF requires a 10μs wake-up delay between the falling edge of CS and the first falling edge of CLK that clocks out the MSB. This timing is fixed and independent of clock frequency. If CLK ≤ 100kHz, the natural clock period inherently satisfies this requirement; for faster clocks, explicit delay insertion in firmware is necessary.
Is the LTC1098IN8#PBF pin-compatible with the LTC1096IN8#PBF?
No - the LTC1098IN8#PBF and LTC1096IN8#PBF have different pinouts. LTC1096 uses IN+/IN– for differential input and has a dedicated VREF pin (Pin 5), while LTC1098 uses CH0/CH1 and repurposes Pin 5 as DIN. Swapping them requires PCB redesign. Their shared DIP-8 package does not imply pin compatibility.
LTC1098IN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- 3V ~ 6V
- Voltage - Supply, Digital:
- 3V ~ 6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
LTC1098IN8#PBF FAQ
1.How can I place an order for LTC1098IN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1098IN8#PBF 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 LTC1098IN8#PBF reliable?
The price and inventory of LTC1098IN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1098IN8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1098IN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1098IN8#PBF transactions.
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4.How is shipping managed for LTC1098IN8#PBF?
LTC1098IN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1098IN8#PBF 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 LTC1098IN8#PBF?
For technical support, including LTC1098IN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1098IN8#PBF requirements.
6.How does Aetrix verify that LTC1098IN8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1098IN8#PBF 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 LTC1098IN8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1098IN8#PBF?
All LTC1098IN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1098IN8#PBF, 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 LTC1098IN8#PBF part is unused and in its original packaging.
Return procedure for LTC1098IN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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