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Analog Devices Inc. LTC1401CS8#TRPBF
- Part No.:
- LTC1401CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1401CS8#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,914
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Product details
Overview
LTC1401CS8#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 packaging for portable data acquisition systems.
For engineers reviewing the LTC1401CS8#TRPBF datasheet, LTC1401CS8#TRPBF pinout, LTC1401CS8#TRPBF application, or LTC1401CS8#TRPBF equivalent, key selection criteria include guaranteed no missing codes over temperature, 315ns acquisition time, Nap/Sleep/Shutdown power modes (1.5mW / 19.5µW / 13.5µW), and REFRDY signal for reference settling confirmation.
Technical Context
The LTC1401CS8#TRPBF implements a capacitive DAC-based successive approximation architecture with internal 1.2V bandgap reference, curvature-corrected and factory-trimmed to ±10ppm/°C full-scale drift. Its sample-and-hold acquires input in 315ns and holds during conversion, enabling precise digitization of fast analog signals without external components.
Digital control uses three dedicated pins: CONV initiates conversion on rising edge; CLK synchronizes 13-bit serial output (REFRDY + 12-bit data); SHDN forces shutdown mode. The 3-wire interface avoids chip select, supports direct connection to TMS320C50 DSPs, and maintains high-impedance DOUT during idle states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes across full temperature range |
| Sampling Rate | 200ksps maximum - enables real-time capture of signals up to 100kHz Nyquist bandwidth |
| Input Range | 0V to 2.048V unipolar - 0.5mV/LSB scaling simplifies system-level voltage mapping |
| S/(N + D) | 68dB at 50kHz - supports >11 ENOB for precision measurement applications |
| Power Dissipation | 15mW typical at 200ksps - low enough for battery-powered handheld instruments |
| INL / DNL | ±1LSB max - ensures monotonicity and accurate code transition behavior |
| Reference Drift | ±45ppm/°C max full-scale - stable enough for industrial temperature ranges without calibration |
Pinout & Package
Package: 8-lead plastic SOIC (SO-8), 150mil width, RoHS-compliant lead-free finish (#PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Accepts 2.7V–3.6V; requires local 10µF + 0.1µF bypassing for noise-sensitive operation |
| AIN (Pin 2) | Analog input node | High-impedance unipolar input (0V–2.048V); draws ≤±1µA leakage during conversion |
| VREF (Pin 3) | Internal reference output | 1.200V ±20mV output; can source up to 1mA; externally overdrivable to adjust full-scale range |
| GND (Pin 4) | Analog ground reference | Must connect directly to analog ground plane; separates analog/digital return paths |
| DOUT (Pin 5) | Serial data output | 3-wire SPI-compatible output; transmits REFRDY bit followed by 12-bit result on CLK rising edge |
| CLK (Pin 6) | Serial clock input | Accepts 0.1–3.2MHz clock; minimum 60ns pulse width required to wake from Nap/Sleep |
| CONV (Pin 7) | Conversion start trigger | Rising-edge initiated; two pulses enter Nap mode, four pulses enter Sleep mode |
| SHDN (Pin 8) | Hardware shutdown control | Pull low to activate Shutdown mode (13.5µW); REFRDY goes low indicating reference inactive |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reference | On-chip 1.2V bandgap reference with ±45ppm/°C drift eliminates need for external precision reference IC |
| Three power modes | Nap (1.5mW), Sleep (19.5µW), Shutdown (13.5µW) - enables dynamic power scaling based on sampling duty cycle |
| REFRDY signaling | First bit in serial output indicates when internal reference has settled - removes need for fixed delay timing in firmware |
| High-Z analog input | 5pF hold-mode capacitance and ±1µA leakage allow direct connection to high-output-impedance sensors or op-amps |
| Unipolar input architecture | 0V–2.048V range with straight-binary coding simplifies digital processing and eliminates offset correction in many applications |
Applications
| Portable Instrumentation | Telecom Signal Monitoring |
|---|---|
Use Scenario: Handheld multimeter or portable oscilloscope capturing sensor or audio-band signals under battery power. IC Role / Device Role / Timing Role: Primary ADC digitizing analog front-end outputs; provides 200ksps throughput with minimal external support circuitry. Use Value: 15mW active power and 19.5µW Sleep mode extend battery life; 315ns acquisition time supports accurate sampling of transient events. | Use Scenario: Base station receiver monitoring RF demodulated baseband signals for spectral analysis or distortion detection. IC Role / Device Role / Timing Role: High-fidelity digitizer for IF/RF chain diagnostics; interfaces directly to TMS320C50 DSP via 3-wire serial link. Use Value: 68dB S/(N+D) at 50kHz and –72dB THD enable clean FFT-based spectrum visualization without averaging artifacts. |
| Multiplexed Data Acquisition | Digital Radio Front-End |
Use Scenario: Industrial PLC module scanning multiple thermocouple or RTD channels using external analog multiplexer. IC Role / Device Role / Timing Role: Shared ADC resource serving multiple inputs; Nap mode reduces power between channel conversions. Use Value: Guaranteed no missing codes and ±1LSB linearity ensure consistent accuracy across all channels without per-channel calibration. | Use Scenario: Software-defined radio (SDR) receiver digitizing I/Q baseband signals prior to FPGA-based demodulation. IC Role / Device Role / Timing Role: Dual-channel-capable ADC (with external mux) providing 12-bit resolution for complex envelope reconstruction. Use Value: Full-power bandwidth of 2MHz and linear bandwidth to 50kHz support wideband modulation schemes including QAM and OFDM. |
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 | 2.7V–5.25V supply range; 200ksps; no internal reference; requires external 2.5V ref | Higher supply flexibility but adds BOM cost and layout complexity for reference circuit | Select when operating above 3.6V or requiring different reference voltage |
| MAX1113ECPP | 2.7V–3.6V supply; 250ksps; internal 2.048V reference; SPI-only interface (no MICROWIRE) | Faster sampling and matched reference voltage, but lacks Nap/Sleep power modes | Select when maximum speed is critical and ultra-low standby power is not required |
Compared with ADS7822U and MAX1113ECPP, the LTC1401CS8#TRPBF uniquely combines integrated 1.2V reference, three-tier power management (Nap/Sleep/Shutdown), and dual-interface compatibility-making it optimal for compact, battery-constrained systems needing guaranteed monotonicity and rapid wake-up response.
Availability
LTC1401CS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, telecom signal monitoring, and multiplexed data acquisition systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1401CS8#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1401CS8#TRPBF belongs to ADI's legacy Linear Technology precision data converter family, designed specifically for low-power, high-accuracy sampling in space- and energy-constrained embedded systems.
FAQ
What is the absolute maximum supply voltage for the LTC1401CS8#TRPBF?
The absolute maximum supply voltage (VCC) for the LTC1401CS8#TRPBF is 7V. Operation beyond this rating may cause permanent damage. The device is specified for normal operation between 2.7V and 3.6V, with typical performance characterized at 3.0V. Exceeding 3.6V violates the recommended operating conditions and risks violating internal reference stability and timing specifications defined in the LTC1401CS8#TRPBF datasheet.
Does the LTC1401CS8#TRPBF require an external reference?
No, the LTC1401CS8#TRPBF does not require an external reference. It integrates a factory-trimmed, temperature-compensated 1.200V ±20mV bandgap reference accessible at Pin 3 (VREF). This internal reference drives the DAC and defines the full-scale input range of 0V–2.048V. The VREF pin can be overdriven externally to adjust full-scale span, but external reference use is optional-not mandatory-for LTC1401CS8#TRPBF operation.
How does the REFRDY signal function in the LTC1401CS8#TRPBF?
The REFRDY signal in the LTC1401CS8#TRPBF is the first bit transmitted on the DOUT pin during each serial read cycle. It indicates whether the internal 1.2V reference has fully 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 fixed-delay polling in firmware and ensures reliable conversion timing - a core feature confirmed in the LTC1401CS8#TRPBF timing diagrams and functional description.
What is the acquisition time specification for the LTC1401CS8#TRPBF?
The acquisition time for the LTC1401CS8#TRPBF is 315ns, measured from the end of conversion until the sample-and-hold capacitor fully captures the analog input voltage. This parameter is guaranteed over the full operating temperature range and is critical for determining minimum inter-conversion intervals in high-speed sampling applications. The value is explicitly specified in the LTC1401CS8#TRPBF datasheet under "Timing Characteristics" and verified in typical performance plots.
Can the LTC1401CS8#TRPBF operate with a 5V supply?
No, the LTC1401CS8#TRPBF cannot operate with a 5V supply. Its absolute maximum VCC rating is 7V, but its recommended operating supply range is strictly 2.7V to 3.6V. Applying 5V exceeds the maximum operating voltage and violates the device's electrical specifications, risking reference instability, timing failure, and potential latch-up. Systems requiring 5V logic must use level-shifting on digital lines while powering the LTC1401CS8#TRPBF itself from a regulated 3V source.
LTC1401CS8#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1401CS8#TRPBF FAQ
1.How can I place an order for LTC1401CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1401CS8#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 LTC1401CS8#TRPBF reliable?
The price and inventory of LTC1401CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1401CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1401CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1401CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1401CS8#TRPBF?
LTC1401CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1401CS8#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 LTC1401CS8#TRPBF?
For technical support, including LTC1401CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1401CS8#TRPBF requirements.
6.How does Aetrix verify that LTC1401CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1401CS8#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 LTC1401CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1401CS8#TRPBF?
All LTC1401CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1401CS8#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 LTC1401CS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1401CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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