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Analog Devices Inc. LTC1298CS8#TRPBF
- Part No.:
- LTC1298CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1298CS8#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,521
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Product details
Overview
LTC1298CS8#TRPBF from Analog Devices is a micropower, 12-bit successive approximation ADC with integrated sample-and-hold and software-selectable 2-channel multiplexer. It operates from 4.5V to 5.5V supply, draws 360µA typical supply current at 11.1 ksps sampling rate, features ±3/4 LSB max DNL, and uses SPI/Microwire-compatible 4-wire serial interface. It is used in battery-powered remote data acquisition systems requiring low quiescent power and dual analog input channel selection.
For engineers reviewing the LTC1298CS8#TRPBF datasheet, LTC1298CS8#TRPBF pinout, LTC1298CS8#TRPBF application, or LTC1298CS8#TRPBF equivalent, key selection criteria include its 2-channel MUX capability, guaranteed monotonicity, auto-shutdown to 1nA, SOIC-8 package compatibility, and differential/single-ended input configuration flexibility per conversion cycle.
Technical Context
The LTC1298CS8#TRPBF implements a switched-capacitor SAR architecture with on-chip sample-and-hold and configurable 2-channel analog multiplexer. Its serial interface requires a start bit followed by a 3-bit input word (SGL/DIFF, ODD/SIGN, MSBF) to select channel mode and data format before outputting the 12-bit result MSB-first.
It supports both single-ended (CH0–GND or CH1–GND) and differential (CH0–CH1 or CH1–CH0) measurements, with reference tied internally to VCC/VREF pin. Conversion timing is clock-dependent: tCONV = 12 CLK cycles, tCYC = 90 µs at 200 kHz, and minimum sample time is 1.5 CLK cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees full-scale monotonic transfer function for precision sensor digitization. |
| Sampling Rate | 11.1 ksps maximum - enables real-time monitoring of slow-varying industrial or environmental signals. |
| Supply Current | 360 µA typ. at 200 kHz CLK - balances speed and ultra-low power for extended battery life in portable instruments. |
| DNL Error | ±3/4 LSB max - ensures linearity critical for accurate ratiometric measurements with resistive sensors. |
| Input Configuration | Software-selectable 2-channel MUX - allows dynamic switching between two analog sources without external hardware. |
| Reference Source | Internal tie to VCC/VREF pin - eliminates need for external reference but binds full-scale range to supply voltage stability. |
| Shutdown Current | 1 nA typ. with CS high - enables true zero-power sleep between conversions in energy-constrained IoT endpoints. |
Pinout & Package
Package: 8-lead plastic SOIC (S8), 150°C max junction temperature, θJA = 130°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS/SHDN (Pin 1) | Chip Select / Shutdown Control | Active-low enable; logic high forces full shutdown (1 nA ICC), eliminating need for external power gating. |
| CH0 (Pin 2) | Analog Input Channel 0 | Primary single-ended or differential input; selected via SGL/DIFF bit in DIN command word. |
| CH1 (Pin 3) | Analog Input Channel 1 | Secondary input for differential measurement (CH0–CH1) or second single-ended source. |
| GND (Pin 4) | Analog Ground Reference | Must connect directly to low-impedance analog ground plane to minimize noise coupling into SAR core. |
| DIN (Pin 5) | Digital Input for MUX Address | Receives 3-bit configuration word (start + SGL/DIFF + ODD/SIGN + MSBF); rising-edge clocked. |
| DOUT (Pin 6) | Serial Data Output | Outputs 12-bit result MSB-first after null bit; supports tri-state when CS high or during idle cycles. |
| CLK (Pin 7) | Serial Interface Clock | Synchronizes all data transfers; falling edge clocks data out, rising edge clocks DIN; max 200 kHz at 5V. |
| VCC/VREF (Pin 8) | Power Supply & Reference Voltage | Single-pin dual function: powers internal circuitry and defines full-scale range (e.g., 5.0 V → 12-bit = 1.22 mV/LSB). |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown to 1 nA | Eliminates external power sequencing logic and reduces system standby power to nanoampere level. |
| 2-channel software-selectable MUX | Enables dual-sensor monitoring (e.g., temperature + humidity) with single ADC, reducing BOM count and PCB area. |
| Guaranteed monotonicity | Ensures no code transitions are skipped across full temperature range, critical for closed-loop control feedback. |
| On-chip sample-and-hold | Removes need for external S/H circuitry, simplifying design and improving acquisition accuracy for high-Z sensors. |
| I/O compatible with SPI/Microwire | Direct interfacing with common microcontrollers (e.g., 8051, ARM Cortex-M) using standard 4-wire protocol. |
Applications
| Battery Monitoring System | Remote Environmental Sensor Node |
|---|---|
Use Scenario: Measuring cell voltage and pack temperature in lithium-ion battery packs for state-of-charge estimation. IC Role / Device Role / Timing Role: Dual-input ADC samples voltage across sense resistor (CH0) and thermistor voltage (CH1) alternately per cycle. Use Value: 12-bit resolution enables detection of <10 mV changes in cell voltage; 1 nA shutdown extends shelf life of backup batteries. |
Use Scenario: Wireless soil moisture and ambient temperature sensing in agricultural IoT deployments. IC Role / Device Role / Timing Role: Converts analog outputs from capacitive soil sensor (CH0) and NTC thermistor (CH1) with programmable single/diff mode. Use Value: Micropower operation allows multi-year operation on coin-cell; SOIC-8 footprint fits compact sensor modules. |
| Handheld Diagnostic Tool | Isolated Industrial Transducer Interface |
Use Scenario: Portable multimeter-style device measuring DC voltage and current simultaneously via shunt and divider networks. IC Role / Device Role / Timing Role: Uses CH0 for voltage measurement (single-ended), CH1 for current-derived voltage (differential against GND-referenced shunt). Use Value: ±3/4 LSB DNL ensures calibration-grade accuracy; 11.1 ksps supports real-time waveform capture up to ~5 kHz. |
Use Scenario: Signal conditioning front-end for 4–20 mA loop-powered transducers in hazardous environments. IC Role / Device Role / Timing Role: Digitizes isolated analog outputs from optocoupler or transformer-coupled signal paths using CH0/CH1 inputs. Use Value: High-impedance analog inputs (20 pF on-channel) minimize loading on isolation barriers; 5.5V max VCC aligns with common isolated DC-DC rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-pin SOIC, 12-bit, 200 ksps, 3.3V-only supply, no internal MUX, external reference required. | Higher speed but lacks integrated MUX and requires separate reference IC and level-shifting for 5V systems. | Select when >100 ksps sampling is needed and board space permits external reference + level shifters. |
| MAX11131AUT+T | 8-pin µDFN, 12-bit, 100 ksps, internal reference, SPI-compatible, 2.7–3.6V supply only. | Smaller package and integrated ref simplify layout, but incompatible with 5V supply and lacks dual-input flexibility. | Prefer for space-constrained 3.3V battery systems where MUX functionality is handled externally. |
Compared with ADS7822U and MAX11131AUT+T, the LTC1298CS8#TRPBF uniquely combines 5V operation, integrated 2-channel MUX, and 1 nA shutdown in SOIC-8-making it optimal for cost-sensitive, low-power, dual-signal monitoring where supply headroom and pin count are constrained.
Availability
LTC1298CS8#TRPBF is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition, and handheld terminal interface requiring stable component supply and long-term production continuity.
Supply support for LTC1298CS8#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1298CS8#TRPBF belongs to the LTC® micropower precision ADC product line, designed specifically for ultra-low-power data acquisition in portable, remote, and energy-harvesting applications where supply current and integration are critical.
FAQ
What is the maximum clock frequency supported by the LTC1298CS8#TRPBF?
The LTC1298CS8#TRPBF supports a maximum clock frequency of 200 kHz when operating from a 5V supply. At higher supply voltages (up to 5.5V), the maximum clock rate remains 200 kHz per datasheet specifications. Exceeding this frequency may cause conversion errors due to insufficient internal settling time.
Can the LTC1298CS8#TRPBF operate with an external reference voltage?
No, the LTC1298CS8#TRPBF does not support an external reference. Its reference is internally tied to the VCC/VREF pin, meaning the full-scale range equals the applied supply voltage (e.g., 5.0 V → 4095 counts = 5.0 V). For external reference flexibility, consider the LTC1286 variant instead.
How does the LTC1298CS8#TRPBF handle channel selection during conversion?
The LTC1298CS8#TRPBF selects input channels via a 3-bit command word shifted into DIN: SGL/DIFF (single-ended vs differential), ODD/SIGN (channel polarity), and MSBF (data order). This configuration is latched on the 4th rising CLK edge after the start bit, defining which analog path is sampled for that conversion cycle.
What is the purpose of the CS/SHDN pin on the LTC1298CS8#TRPBF?
The CS/SHDN pin on the LTC1298CS8#TRPBF serves dual functions: active-low chip select during serial communication and hardware shutdown control. When held high (at VCC), it disables all internal circuitry and reduces supply current to 1 nA typical-enabling true zero-power standby without external regulators or switches.
Does the LTC1298CS8#TRPBF support differential input measurements?
Yes, the LTC1298CS8#TRPBF supports differential measurements between CH0 and CH1. When configured via the SGL/DIFF bit in the DIN command word, it measures the voltage difference (CH0 – CH1 or CH1 – CH0 depending on ODD/SIGN bit), enabling rejection of common-mode noise in noisy industrial environments.
LTC1298CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 11.1k
- Number of Inputs:
- 2
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1298CS8#TRPBF FAQ
1.How can I place an order for LTC1298CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1298CS8#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 LTC1298CS8#TRPBF reliable?
The price and inventory of LTC1298CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1298CS8#TRPBF is usually 5 days.
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LTC1298CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1298CS8#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 LTC1298CS8#TRPBF?
For technical support, including LTC1298CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1298CS8#TRPBF requirements.
6.How does Aetrix verify that LTC1298CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1298CS8#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 LTC1298CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1298CS8#TRPBF?
All LTC1298CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1298CS8#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 LTC1298CS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1298CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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