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Analog Devices Inc. LTC1401IS8#TRPBF
- Part No.:
- LTC1401IS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1401IS8#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,887
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Product details
Overview
LTC1401IS8#TRPBF from Analog Devices (formerly Linear Technology) is a complete 12-bit, 200ksps successive-approximation ADC with integrated 1.2V reference, sample-and-hold, and 3-wire SPI/MICROWIRE-compatible serial interface. It operates from a single 3V supply, delivers ±1LSB INL/DNL, 68dB S/(N+D) at 50kHz, and supports unipolar 0V–2.048V input range in SO-8 package for portable data acquisition.
For engineers reviewing the LTC1401IS8#TRPBF datasheet, LTC1401IS8#TRPBF pinout, LTC1401IS8#TRPBF application, or LTC1401IS8#TRPBF equivalent, key selection criteria include guaranteed no-missing-codes over temperature, 350ns wake-up from Nap mode, REFRDY signal for reference readiness, and compatibility with low-power microcontrollers and DSPs requiring compact serial ADC interfaces.
Technical Context
The LTC1401IS8#TRPBF implements a capacitive DAC-based successive approximation architecture with internal 315ns sample-and-hold and factory-trimmed curvature-corrected bandgap reference. Its control logic synchronizes conversion start via CONV rising edge and serial output timing via CLK, delivering 12-bit data as REFRDY + 12-bit word on DOUT.
Power management includes three distinct low-power states: Nap mode (1.5mW, reference active), Sleep mode (19.5µW, reference and comparator disabled), and Shutdown mode (13.5µW, SHDN pin asserted). Reference wake-up time from Sleep/Shutdown is 3ms with 10µF bypass capacitor, signaled by REFRDY bit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes over full temperature range |
| Sampling Rate | 200ksps maximum - enables real-time capture of signals up to 100kHz Nyquist bandwidth |
| Supply Voltage | 2.7V to 3.6V - compatible with standard 3V battery and LDO rails |
| INL / DNL | ±1LSB max - ensures monotonicity and ≤0.024% full-scale linearity error |
| S/(N+D) | 68dB at 50kHz - supports >11 effective bits for precision measurement applications |
| THD | –72dB at 50kHz - minimizes harmonic contamination in spectral analysis |
| Power (Active) | 15mW typical at 200ksps - enables battery operation in handheld instruments |
| Reference Output | 1.200V ±20mV, ±45ppm/°C drift - provides stable scaling without external components |
Pinout & Package
Package: 8-lead plastic SOIC (SO-8), 3.9mm × 4.9mm body, 1.27mm pitch, RoHS-compliant lead-free finish (#PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Accepts 2.7–3.6V; requires 10µF + 0.1µF local bypass for noise-sensitive analog performance |
| AIN (Pin 2) | Analog input node | Unipolar 0V–2.048V range; high-impedance sample mode (45pF), low-leakage hold mode (±1µA) |
| VREF (Pin 3) | Internal reference output | 1.200V source capable of 1mA load; externally overdrivable to adjust full-scale span |
| GND (Pin 4) | Analog ground reference | Must connect directly to low-impedance analog ground plane; separates analog/digital return paths |
| DOUT (Pin 5) | Serial data output | 3-wire interface output; transmits REFRDY bit followed by 12-bit result on CLK rising edge |
| CLK (Pin 6) | Serial clock input | Accepts 0.1–3.2MHz; 60ns minimum pulse width; controls data timing and Nap/Sleep wake-up |
| CONV (Pin 7) | Conversion start trigger | Rising-edge initiated; two pulses (CLK low) enter Nap, four pulses enter Sleep mode |
| SHDN (Pin 8) | Hardware shutdown control | Logic-low assertion disables internal circuitry and reduces current to 4.5–10µA |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reference with 3ms wake-up | Eliminates external reference IC and simplifies layout while ensuring reference stability before conversion |
| 3-wire SPI/MICROWIRE interface | Reduces MCU GPIO count and PCB routing complexity versus parallel bus ADCs |
| Nap mode with 350ns wake-up | Enables burst-mode sampling with minimal latency penalty between conversions |
| REFRDY bit in serial word | Provides deterministic synchronization for systems requiring precise timing of valid data |
| 0V–2.048V input range (0.5mV/LSB) | Matches common sensor output ranges and avoids level-shifting circuitry |
| SO-8 footprint with analog/digital isolation | Supports compact designs while enabling clean separation of analog and digital ground planes |
Applications
| Handheld Test Equipment | Digital Radio Receivers |
|---|---|
Use Scenario: Battery-powered multimeter or spectrum analyzer capturing transient waveforms in field service. IC Role / Device Role / Timing Role: Primary analog front-end digitizer acquiring baseband I/Q signals at 200ksps with low power budget. Use Value: 15mW active power and 13.5µW shutdown enable >10-hour battery life; ±1LSB linearity ensures calibrated measurement accuracy. | Use Scenario: IF sampling stage in software-defined radio (SDR) architecture receiving 50kHz–100kHz demodulated signals. IC Role / Device Role / Timing Role: High-fidelity ADC converting analog IF output to 12-bit digital stream for FPGA-based demodulation. Use Value: 68dB S/(N+D) and –72dB THD preserve signal integrity across modulation bandwidth; REFRDY bit aligns FPGA sampling clock to reference settling. |
| Multiplexed Data Acquisition | Telecom Channel Monitoring |
Use Scenario: Industrial PLC module scanning multiple 4–20mA sensor channels via analog multiplexer. IC Role / Device Role / Timing Role: Shared ADC resource performing sequential conversions across 8–16 channels with Nap-mode power gating between samples. Use Value: 350ns Nap wake-up minimizes inter-channel dead time; 1.2V reference stability ensures consistent gain across all channels. | Use Scenario: Line card monitoring analog voice channel voltage levels and distortion in PSTN infrastructure. IC Role / Device Role / Timing Role: Precision monitor ADC validating signal quality prior to digitization and compression. Use Value: No-missing-codes guarantee prevents data gaps during fault detection; 2.048V full-scale matches telecom test equipment standards. |
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 | 200ksps, 12-bit, 2.7–5.25V supply, no internal reference, requires external REF | Higher supply flexibility but adds BOM cost and layout complexity for reference circuit | Select when operating above 3.6V or needing adjustable reference voltage |
| MAX1113ECUA+ | 250ksps, 12-bit, 2.7–3.6V, internal 2.048V reference, SPI-only interface (no MICROWIRE) | Faster sampling and identical reference voltage, but lacks MICROWIRE compatibility | Select when maximizing throughput and using SPI-only host controllers |
Compared with ADS7822U and MAX1113ECUA+, the LTC1401IS8#TRPBF uniquely integrates a temperature-stable 1.2V reference with MICROWIRE compatibility and Nap-mode wake-up-making it optimal for space-constrained, low-voltage, multi-protocol embedded systems where reference accuracy and fast low-power responsiveness are critical.
Availability
LTC1401IS8#TRPBF is available at Aetrix Electronics and suitable for handheld instrumentation, telecom monitoring, and multiplexed industrial data acquisition requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1401IS8#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, serving industrial, automotive, communications, and healthcare markets.
The LTC1401IS8#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for low-power, high-accuracy 12-bit sampling in portable and embedded systems where integration, reliability, and ease of use are prioritized.
FAQ
What is the operating temperature range for the LTC1401IS8#TRPBF?
The LTC1401IS8#TRPBF is specified for –40°C to +85°C ambient operating temperature (Industrial grade). This range is confirmed in the Absolute Maximum Ratings table and applies to all DC and dynamic specifications unless otherwise noted. The device maintains ±1LSB INL/DNL and 68dB S/(N+D) across this full range, making it suitable for harsh-environment deployments.
Does the LTC1401IS8#TRPBF require an external reference?
No, the LTC1401IS8#TRPBF includes a factory-trimmed, temperature-compensated 1.200V internal reference available at Pin 3 (VREF). It can drive up to 1mA and supports external overdrive for input span adjustment. An external reference is optional only if higher accuracy, lower drift, or non-standard full-scale voltage is required - such as using an LT1634-1.25 to achieve 2.1338V full scale.
How does the REFRDY signal function in the LTC1401IS8#TRPBF?
The REFRDY signal is the first bit transmitted on the DOUT pin during each serial read cycle. It indicates whether the internal reference has settled after exiting Sleep or Shutdown mode. When REFRDY = 1, the reference is stable and the subsequent 12-bit data word is valid. This eliminates need for fixed delay timers and enables deterministic synchronization in time-critical systems using the LTC1401IS8#TRPBF.
What are the power consumption values for each low-power mode of the LTC1401IS8#TRPBF?
In active conversion mode at 200ksps, the LTC1401IS8#TRPBF draws 5–10mA (15mW typ). In Nap mode, supply current drops to 0.5–1.0mA (1.5mW typ); in Sleep mode, it is 6.5–15µA (19.5µW typ); and in Shutdown mode (SHDN = low), it falls to 4.5–10µA (13.5µW typ). All values are specified over the full temperature range and verified per the Power Requirements table.
Can the LTC1401IS8#TRPBF interface directly with a TMS320C50 DSP?
Yes, the LTC1401IS8#TRPBF is explicitly validated for interface with the TMS320C50 DSP using its TDM serial port, as shown in Typical Application TA04a. The 3-wire interface (CLK, CONV, DOUT) maps directly to TCLKX, TFSX, and TDR pins. Frame sync is generated from TFSX, and data is right-justified in the TRCV register - confirming seamless hardware-level compatibility without protocol translation.
LTC1401IS8#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):
- 200k
- Number of Inputs:
- 1
- Input Type:
- 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, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1401IS8#TRPBF FAQ
1.How can I place an order for LTC1401IS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1401IS8#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 LTC1401IS8#TRPBF reliable?
The price and inventory of LTC1401IS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1401IS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1401IS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1401IS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1401IS8#TRPBF?
LTC1401IS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1401IS8#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 LTC1401IS8#TRPBF?
For technical support, including LTC1401IS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1401IS8#TRPBF requirements.
6.How does Aetrix verify that LTC1401IS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1401IS8#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 LTC1401IS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1401IS8#TRPBF?
All LTC1401IS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1401IS8#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 LTC1401IS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1401IS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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