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Texas Instruments ADC121S101QIMFX/NOPB
- Part No.:
- ADC121S101QIMFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
ADC121S101QIMFX/NOPB.pdf
- Description:
- IC ADC 12BIT SAR SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADC121S101QIMFX/NOPB from Texas Instruments is a single-channel, 12-bit successive-approximation ADC with SPI-compatible serial interface, operating from 2.7 V to 5.25 V supply and delivering 500 ksps to 1 Msps sample rates. It features ±0.4 LSB typical INL, 72 dB SINAD at 100 kHz input, and 2.6 µW shutdown power consumption-designed for precision sensing in space-constrained automotive and portable instrumentation.
For engineers reviewing the ADC121S101QIMFX/NOPB datasheet, ADC121S101QIMFX/NOPB pinout, ADC121S101QIMFX/NOPB application, or ADC121S101QIMFX/NOPB equivalent, key selection criteria include guaranteed 12-bit no-missing-codes performance over −40°C to 125°C, WSON-6 package compatibility with high-density PCB layouts, low-power shutdown mode timing (tPOWER-UP = 1 µs), and AEC-Q100 Grade 1 qualification for automotive signal acquisition.
Technical Context
The ADC121S101QIMFX/NOPB implements a charge-redistribution SAR architecture with internal track-and-hold, enabling precise sampling of analog inputs up to VA (2.7–5.25 V) without external components. Its serial interface supports SPI, QSPI, MICROWIRE, and DSP protocols via CS, SCLK, and SDATA pins-operating with straight-binary 12-bit output preceded by three leading zero bits.
Functional modes are controlled solely by CS timing: conversion initiates on CS falling edge; hold-to-track transition occurs on the 13th rising SCLK edge; and shutdown is entered if CS is raised between the 2nd and 10th falling SCLK edges. Acquisition time (tACQ = 350 ns) and quiet time (tQUIET = 50 ns) are strictly defined to ensure deterministic throughput across the full 500 ksps–1 Msps range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes over −40°C to 125°C-guarantees monotonicity and full-scale linearity in safety-critical sensing. |
| Sample Rate Range | 500 ksps to 1 Msps-fully specified across entire range, not just at nominal clock frequency. |
| INL | ±0.4 LSB typical (SOT-23/WSON, −40°C to 85°C)-enables <0.1% full-scale error in closed-loop control feedback paths. |
| Power (3 V) | 2 mW typical normal mode-supports battery-powered data loggers with multi-day runtime. |
| Shutdown Power | 2.6 µW at 5 V-reduces quiescent load during idle intervals in duty-cycled sensor systems. |
| Aperture Jitter | 30 ps-limits SNR degradation to <0.1 dB at 100 kHz input, preserving ENOB ≥11.3 bits. |
| ESD Rating | ±3500 V HBM-meets industrial handling requirements without additional protection circuitry. |
Pinout & Package
ADC121S101QIMFX/NOPB is packaged in a 6-pin WSON (NGF) package measuring 2.50 mm × 2.20 mm with exposed thermal pad. The package supports reflow soldering per JEDEC J-STD-020 and provides low thermal resistance (RθJB = 69°C/W) for stable operation in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VA | Analog power supply | Must be bypassed with 1-µF + 0.1-µF capacitors within 1 cm-directly sets full-scale input range (0 to VA) and impacts INL/ENOB. |
| GND | Analog/digital ground reference | Single ground plane required; center thermal pad must be connected to GND for thermal and EMI performance. |
| VIN | Differential analog input | Unipolar input (0 to VA); 4 pF input capacitance and 500 Ω switch resistance require low-Z source or anti-aliasing filter. |
| SCLK | Serial clock input | Controls conversion timing and data readout; 10–20 MHz range defines maximum throughput and aperture jitter. |
| SDATA | Serial data output | Three leading zeros + 12-bit straight binary MSB-first; TRI-STATE disabled on CS fall, enabled after 16th SCLK fall. |
| CS | Chip select / mode control | Falling edge initiates conversion; timing relative to SCLK edges determines normal vs. shutdown mode entry. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Rated for −40°C to 125°C operation with validated reliability-suitable for engine control, ADAS sensor front-ends, and body electronics. |
| Variable power management | Dynamic trade-off between throughput and power via CS-controlled shutdown-enables µW-level average power in burst-sampling applications. |
| SPI/QSPI/MICROWIRE compatible | Direct interface to TI C2000, STM32, and NXP S32K MCUs without level shifters or protocol translation logic. |
| Internal track-and-hold | Eliminates need for external sample-hold amplifier-reduces BOM count and board area in compact data acquisition modules. |
| Guaranteed specs over full rate range | No derating required when scaling sample rate from 500 ksps to 1 Msps-simplifies system-level timing validation. |
Applications
| Automotive Sensor Interface | Portable Data Logger |
|---|---|
Use Scenario: Monitoring exhaust gas oxygen (EGO) sensor voltage in real time for closed-loop fuel trim control. IC Role / Device Role / Timing Role: Precision 12-bit digitization of 0–1 V analog signal with <1 µs aperture uncertainty and AEC-Q100 compliance. Use Value: Enables accurate lambda calculation at 1 Msps, supporting fast transient response during acceleration/deceleration events. | Use Scenario: Battery-powered environmental monitoring node capturing temperature, humidity, and pressure at 1 ksps. IC Role / Device Role / Timing Role: Low-power analog front-end ADC with 2.6 µW shutdown state and 1 µs wake-up latency. Use Value: Extends battery life to >2 years by reducing average current to sub-µA during 99.9% idle time. |
| Industrial Process Controller | Medical Instrumentation |
Use Scenario: Digitizing 4–20 mA loop signals via precision shunt resistor in PLC analog input modules. IC Role / Device Role / Timing Role: High-accuracy 12-bit converter with ±0.4 LSB INL and 72 dB SINAD at 100 kHz. Use Value: Meets IEC 61000-4-5 surge immunity requirements while maintaining <0.025% full-scale error over temperature. | Use Scenario: Sampling biopotential signals (ECG, EMG) in handheld diagnostic devices with isolated front-end. IC Role / Device Role / Timing Role: Low-noise, low-jitter ADC with 30 ps aperture jitter and 11.6-bit ENOB at 100 kHz. Use Value: Preserves signal fidelity for clinical-grade waveform analysis without oversampling or digital filtering overhead. |
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-bit resolution, 200 ksps max, 3-V-only supply (2.7–3.6 V), no AEC-Q100 rating | Limited to non-automotive, lower-accuracy portable systems where 12-bit resolution is unnecessary | Select only if cost sensitivity outweighs resolution, speed, and qualification requirements. |
| ADS8860IDRCT | 16-bit resolution, 1 Msps, SPI interface, 2.5–5.5 V supply, but larger 10-pin VSSOP package and higher 12.5 mW power | Suitable for high-precision test equipment requiring extended dynamic range, not space/power-constrained automotive nodes | Choose when ENOB >14 bits and THD <−100 dB are mandatory; avoid for AEC-Q100-compliant designs unless requalified. |
Compared with ADS7822U and ADS8860IDRCT, ADC121S101QIMFX/NOPB uniquely balances 12-bit accuracy, 1-Msps throughput, AEC-Q100 Grade 1 qualification, and ultra-low 2.6-µW shutdown power in a 2.5×2.2-mm WSON package-making it optimal for automotive and portable systems where size, power, and qualification are co-constrained.
Availability
ADC121S101QIMFX/NOPB is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable data loggers, industrial process controllers, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADC121S101QIMFX/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with over 50 years of innovation in precision data converters and automotive-grade ICs.
The ADC121S101 product line delivers single-channel, low-power SAR ADCs optimized for automotive, industrial, and portable applications demanding AEC-Q100 qualification, wide supply range, and guaranteed performance across full sample-rate and temperature ranges.
FAQ
What is the guaranteed operating temperature range for ADC121S101QIMFX/NOPB?
The ADC121S101QIMFX/NOPB is fully specified from −40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements. All electrical characteristics-including INL (±0.4 LSB), DNL (+0.5/−0.3 LSB), and power consumption-are guaranteed across this range, making ADC121S101QIMFX/NOPB suitable for under-hood automotive and industrial control environments.
Does ADC121S101QIMFX/NOPB support true differential input?
No, ADC121S101QIMFX/NOPB accepts only single-ended unipolar analog inputs (0 V to VA). Its VIN pin is referenced to GND, and the internal architecture lacks differential sampling capability. For differential applications, external signal conditioning (e.g., instrumentation amplifier) is required before connecting to ADC121S101QIMFX/NOPB.
How many clock cycles are required to read a complete conversion result from ADC121S101QIMFX/NOPB?
ADC121S101QIMFX/NOPB requires exactly 16 SCLK falling edges to output a full conversion result: three leading zero bits followed by twelve 12-bit straight-binary data bits, MSB first. The SDATA pin enters TRI-STATE after the 16th falling edge-or immediately upon CS rising edge, whichever occurs first.
Can ADC121S101QIMFX/NOPB operate with a 2.5-V supply?
No-ADC121S101QIMFX/NOPB has a minimum supply voltage of 2.7 V per its Recommended Operating Conditions. Operation below 2.7 V violates specification and may cause missing codes, increased INL/DNL, or failure to meet AEC-Q100 timing parameters. Systems requiring 2.5-V operation should consider alternative ADCs such as the ADS7822 or ADS8860 series.
Is the WSON-6 package of ADC121S101QIMFX/NOPB RoHS-compliant and lead-free?
Yes, ADC121S101QIMFX/NOPB carries the /NOPB suffix, indicating lead-free (Pb-free) and RoHS-compliant construction. The WSON-6 package meets JEDEC J-STD-020 moisture sensitivity level 2a and supports standard reflow profiles, including peak temperatures up to 260°C.
ADC121S101QIMFX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- SOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
ADC121S101QIMFX/NOPB FAQ
1.How can I place an order for ADC121S101QIMFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC121S101QIMFX/NOPB 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 ADC121S101QIMFX/NOPB reliable?
The price and inventory of ADC121S101QIMFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC121S101QIMFX/NOPB is usually 5 days.
3.What payment methods are accepted for ADC121S101QIMFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC121S101QIMFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC121S101QIMFX/NOPB?
ADC121S101QIMFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC121S101QIMFX/NOPB 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 ADC121S101QIMFX/NOPB?
For technical support, including ADC121S101QIMFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC121S101QIMFX/NOPB requirements.
6.How does Aetrix verify that ADC121S101QIMFX/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC121S101QIMFX/NOPB 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 ADC121S101QIMFX/NOPB meets industry standards.
7.What is the process for return or replacement of ADC121S101QIMFX/NOPB?
All ADC121S101QIMFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC121S101QIMFX/NOPB, 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 ADC121S101QIMFX/NOPB part is unused and in its original packaging.
Return procedure for ADC121S101QIMFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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