My Inquiry
My Account
Texas Instruments ADC121S101QIMF/NOPB
- Part No.:
- ADC121S101QIMF/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
ADC121S101QIMF/NOPB.pdf
- Description:
- IC ADC 12BIT SAR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,794
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADC121S101QIMF/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 and delivering up to 1 Msps sample rate over −40°C to 125°C. It features ±0.4 LSB typical INL, 72 dB SINAD at 100 kHz input, and 2.6 µW shutdown power at 5 V - deployed in automotive sensor signal chains and portable instrumentation.
For engineers reviewing the ADC121S101QIMF/NOPB datasheet, ADC121S101QIMF/NOPB pinout, ADC121S101QIMF/NOPB application, or ADC121S101QIMF/NOPB equivalent, key selection criteria include guaranteed 500 ksps–1 Msps operation across temperature, straight-binary SPI/QSPI/MICROWIRE output format, WSON-6 package compatibility, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The ADC121S101QIMF/NOPB implements a charge-redistribution SAR architecture with integrated track-and-hold, enabling precise sampling of analog inputs up to VA (2.7–5.25 V) with 12-bit resolution and no missing codes. Its conversion timing is fully synchronized to SCLK, requiring exactly 16 falling edges to output 12 data bits preceded by three leading zeros.
Functional mode control is managed solely via the CS pin: low CS initiates conversion and enables SDATA output; high CS during cycles 2–10 forces shutdown mode (2.6 µW), while sustained low CS maintains continuous normal operation (10 mW at 5 V). Input and output logic levels are decoupled from supply voltage - digital pins tolerate up to 5.25 V regardless of VA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees monotonic transfer function and deterministic code transitions across full temperature range. |
| Sample Rate Range | 500 ksps to 1 Msps - fully specified performance across entire range, not just at nominal rate, enabling flexible throughput tuning. |
| INL (typ) | ±0.4 LSB - ensures <0.1% full-scale linearity error for precision sensor digitization without calibration. |
| SINAD (typ) | 72 dB at fIN = 100 kHz - supports >11.6 ENOB for accurate AC signal capture in instrumentation-grade applications. |
| Supply Voltage | 2.7 V to 5.25 V - allows direct interfacing with 3.3 V and 5 V microcontrollers and mixed-signal systems without level-shifting. |
| Shutdown Power | 2.6 µW at 5 V - enables ultra-low-power duty-cycled sensing in battery-operated remote acquisition nodes. |
| Serial Interface | SPI/QSPI/MICROWIRE/DSP compatible - simplifies integration with TI C2000, ARM Cortex-M, and legacy DSP platforms. |
Pinout & Package
ADC121S101QIMF/NOPB is packaged in a 6-pin WSON (NGF) package measuring 2.50 mm × 2.20 mm with exposed thermal pad. Pin 1 is VA (analog supply), Pin 2 is GND, Pin 3 is VIN (single-ended analog input), Pin 4 is SCLK (serial clock input), Pin 5 is SDATA (serial data output), and Pin 6 is CS (chip select input). The center thermal pad must be connected to GND for thermal and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VA | Analog power supply input | Must be bypassed with 1-µF + 0.1-µF capacitors within 1 cm; powers internal reference, DAC, and comparator - noise on this rail directly degrades SNR. |
| 2 - GND | Analog/digital ground return | Single ground plane required; connects to thermal pad - separation from noisy digital grounds causes INL drift and increased THD. |
| 3 - VIN | Analog input (0 V to VA) | High-impedance input with 4 pF capacitance and 500 Ω switch resistance - requires low-Z source or external buffer for >10 kHz signals to avoid acquisition errors. |
| 4 - SCLK | Serial clock input | Controls conversion timing and data readout; accepts 10–20 MHz clocks; duty cycle 40–60% - jitter here directly contributes to aperture jitter (30 ps typ). |
| 5 - SDATA | Serial data output | Tri-state CMOS output; delivers 12-bit straight-binary result MSB-first after three leading zeros on falling SCLK edges - must be terminated if trace >10 cm. |
| 6 - CS | Chip select / mode control | Falling edge initiates conversion; high state between cycles enables shutdown; timing relative to SCLK determines functional mode (normal vs. shutdown). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Rated for −40°C to +125°C ambient operation with full electrical specs guaranteed - suitable for under-hood automotive sensors and engine control modules. |
| Variable power management | Dynamic switching between 10 mW (5 V, 1 Msps) and 2.6 µW (5 V, shutdown) via CS pin - enables adaptive power scaling in energy-constrained IoT endpoints. |
| Straight-binary SPI-compatible output | 16-cycle frame (3 zero bits + 12 data bits) aligns with standard MCU SPI peripherals - eliminates need for custom firmware bit-shifting or format translation. |
| Specified over full sample rate range | INL, DNL, SINAD, and timing parameters validated from 500 ksps to 1 Msps - removes derating uncertainty when optimizing system throughput vs. accuracy. |
| Input voltage range = 0 V to VA | Eliminates need for external level-shifting circuitry when digitizing signals referenced to same supply as microcontroller I/O - reduces BOM count and layout area. |
Applications
| Automotive Engine Control | Portable Data Loggers |
|---|---|
|
Use Scenario: Digitizing throttle position, coolant temperature, and oxygen sensor outputs in real time within ECU hardware. IC Role / Device Role / Timing Role: Primary analog front-end ADC converting conditioned sensor voltages into 12-bit digital words for closed-loop control algorithms. Use Value: AEC-Q100 Grade 1 rating and guaranteed 125°C operation ensure reliability in harsh under-hood environments; 1 Msps capability supports fast transient detection. |
Use Scenario: Battery-powered field instruments capturing vibration, pressure, or environmental data over extended periods. IC Role / Device Role / Timing Role: Low-power sampling node that acquires analog sensor data and transmits results via MCU UART or BLE. Use Value: 2.6 µW shutdown current extends battery life; 3-V operation and small WSON-6 footprint minimize size and power budget in handheld enclosures. |
| Industrial Process Monitoring | Medical Diagnostic Equipment |
|
Use Scenario: Continuous monitoring of flow meters, strain gauges, and thermocouple amplifiers in factory automation PLCs. IC Role / Device Role / Timing Role: Precision ADC interfacing with op-amp signal conditioning stages to deliver calibrated 12-bit readings to industrial microcontrollers. Use Value: ±0.4 LSB INL and 72 dB SINAD meet Class A instrumentation accuracy requirements; SPI interface simplifies isolation barrier implementation. |
Use Scenario: Signal acquisition in portable ultrasound probes and patient vital sign monitors requiring compact, low-noise analog digitization. IC Role / Device Role / Timing Role: High-fidelity analog-to-digital converter capturing amplified bio-sensor outputs with minimal added noise or distortion. Use Value: 30 ps aperture jitter and 11.6 ENOB preserve signal integrity for time-domain analysis; 2.7–5.25 V supply flexibility eases integration with medical SoCs. |
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 |
|---|---|---|---|
| ADS7822IDR | 8-bit resolution, 200 ksps max, no AEC-Q100 qualification, 3-V-only supply (2.7–3.6 V) | Lower accuracy and speed; limited to non-automotive portable systems with strict 3-V constraints | Select only when 8-bit resolution suffices and automotive qualification is unnecessary. |
| ADS8860IDRCT | 16-bit resolution, 1 Msps, SPI interface, but 1.8-V I/O, no AEC-Q100 Grade 1, higher power (12 mW) | Higher precision for metrology; unsuitable for automotive due to temp range (−40°C to 85°C) and lack of qualification | Choose for lab-grade instrumentation where 16-bit linearity outweighs automotive compliance needs. |
Compared with ADS7822IDR and ADS8860IDRCT, ADC121S101QIMF/NOPB uniquely balances 12-bit precision, 1 Msps throughput, AEC-Q100 Grade 1 qualification, and ultra-low shutdown power - making it the optimal choice for cost-sensitive, thermally demanding automotive and industrial edge nodes requiring verified reliability.
Availability
ADC121S101QIMF/NOPB is available at Aetrix Electronics and suitable for automotive engine control units, portable data loggers, and industrial process monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADC121S101QIMF/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 decades of expertise in precision data converters and automotive-grade IC design.
The ADC121S101QIMF/NOPB belongs to TI's precision SAR ADC product line, engineered specifically for high-reliability, low-power signal acquisition in automotive, industrial, and portable instrumentation applications.
FAQ
What is the maximum guaranteed sample rate for ADC121S101QIMF/NOPB across its full operating temperature range?
The ADC121S101QIMF/NOPB is fully specified for operation up to 1 Msps across −40°C to +125°C. This maximum rate is guaranteed under all recommended conditions: VA = 2.7 V to 5.25 V, fSCLK = 20 MHz, and proper timing margins (e.g., tACQ ≥ 350 ns). Performance remains stable without derating, unlike many SAR ADCs that only guarantee top speed at 25°C.
Does ADC121S101QIMF/NOPB require an external reference voltage?
No, ADC121S101QIMF/NOPB uses an internal reference derived from VA, so the full-scale range is always 0 V to VA. No external reference is needed, simplifying design and reducing component count. The device does not support external reference inputs - all specifications assume VA-referenced operation.
How does the CS pin control power modes in ADC121S101QIMF/NOPB?
In ADC121S101QIMF/NOPB, pulling CS low initiates conversion and enters normal mode (10 mW at 5 V). To enter shutdown mode (2.6 µW), CS must be driven high between the 2nd and 10th falling edge of SCLK after CS goes low. Holding CS high continuously maintains shutdown; no additional control signals are required.
Is ADC121S101QIMF/NOPB pin-compatible with other devices in the ADC121Sxxx family?
Yes, ADC121S101QIMF/NOPB is fully pin- and function-compatible with ADC121S021 and ADC121S051 in the same WSON-6 and SOT-23-6 packages. All share identical pinout, interface protocol, and power sequencing - enabling drop-in resolution or speed upgrades without PCB changes.
What are the absolute maximum ratings for analog input voltage on ADC121S101QIMF/NOPB?
The absolute maximum analog input voltage on ADC121S101QIMF/NOPB is VA + 0.3 V or GND − 0.3 V - exceeding these limits risks forward-biasing internal ESD diodes and causing latch-up or measurement errors. The recommended operating range remains strictly 0 V to VA, as specified in Section 7.4 of the datasheet.
ADC121S101QIMF/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
ADC121S101QIMF/NOPB FAQ
1.How can I place an order for ADC121S101QIMF/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC121S101QIMF/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 ADC121S101QIMF/NOPB reliable?
The price and inventory of ADC121S101QIMF/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC121S101QIMF/NOPB is usually 5 days.
3.What payment methods are accepted for ADC121S101QIMF/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC121S101QIMF/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC121S101QIMF/NOPB?
ADC121S101QIMF/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC121S101QIMF/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 ADC121S101QIMF/NOPB?
For technical support, including ADC121S101QIMF/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC121S101QIMF/NOPB requirements.
6.How does Aetrix verify that ADC121S101QIMF/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC121S101QIMF/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 ADC121S101QIMF/NOPB meets industry standards.
7.What is the process for return or replacement of ADC121S101QIMF/NOPB?
All ADC121S101QIMF/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC121S101QIMF/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 ADC121S101QIMF/NOPB part is unused and in its original packaging.
Return procedure for ADC121S101QIMF/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADC121S101QIMF/NOPB Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
