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Texas Instruments ADC122S051QIMM/NOPB
- Part No.:
- ADC122S051QIMM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADC122S051QIMM/NOPB.pdf
- Description:
- IC ADC 12BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,023
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Product details
Overview
ADC122S051QIMM/NOPB from Texas Instruments is a dual-channel, 12-bit successive-approximation ADC with SPI-compatible serial interface, 200–500 ksps sample rate, ±0.5 LSB typical INL, and operation from 2.7V to 5.25V supply. It integrates internal track-and-hold and multiplexer for IN1/IN2 analog inputs, targeting precision data acquisition in space-constrained industrial and automotive systems.
For engineers reviewing the ADC122S051QIMM/NOPB datasheet, ADC122S051QIMM/NOPB pinout, ADC122S051QIMM/NOPB application, or ADC122S051QIMM/NOPB equivalent, key selection criteria include its AEC-Q100 qualification, 72.5 dB SNR at 40.2 kHz, 0.14 µW shutdown power at 3V, 8-pin VSSOP package, and straight-binary output compatible with SPI/QSPI/MICROWIRE controllers.
Technical Context
The ADC122S051QIMM/NOPB employs a charge-redistribution DAC architecture with internal track-and-hold, enabling simultaneous sampling control across two channels via programmable MUX address bits (ADD0–ADD2). Conversion timing is fully synchronous to SCLK, requiring 16 clock cycles per frame - 3 for acquisition and 13 for conversion + MSB-first readout.
Its digital interface uses CS as frame initiator and output enable: DOUT enters high-impedance when CS is high, and DIN accepts 8-bit control register data on rising SCLK edges within each frame. Power management is implemented via CS-driven shutdown, reducing supply current to 38 nA at 3.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - ensures monotonicity and full-scale fidelity in closed-loop control feedback paths. |
| Sample Rate | 200–500 ksps range - supports real-time monitoring of fast transients in motor phase currents or sensor bursts without oversampling hardware. |
| INL / DNL | ±0.5 LSB / +0.7/−0.4 LSB typical - enables <1 LSB error in 12-bit measurement systems without calibration. |
| SNR | 72.5 dB at 40.2 kHz - delivers >11.7 ENOB for accurate representation of low-amplitude signals in noisy industrial environments. |
| Supply Range | +2.7V to +5.25V - allows direct interfacing with 3.3V or 5V microcontrollers and compatibility with legacy industrial rails. |
| Power (3V) | 3.0 mW active / 0.14 µW shutdown - reduces thermal load in sealed enclosures and extends battery life in portable diagnostics. |
| Package | 8-pin VSSOP (2.3 mm × 2.0 mm) - fits high-density PCB layouts where QFN or SOIC are too large. |
Pinout & Package
ADC122S051QIMM/NOPB is housed in an 8-lead VSSOP package (DGK suffix), with exposed pad not electrically connected. Thermal resistance θJA = 250°C/W; requires standard lead-free reflow profile per TI packaging guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Chip Select / Frame Control | Falling edge initiates conversion frame and enables DOUT; high state forces shutdown and tri-states output. |
| 2 - VA | Analog Supply | +2.7V to +5.25V reference and supply rail; must be bypassed with 1 µF + 0.1 µF capacitors within 1 cm. |
| 3 - GND | Analog Ground | Common return for analog circuitry; separate from digital ground in mixed-signal layout to minimize noise coupling. |
| 4 - IN2 | Analog Input Channel 2 | 0V to VA input range; selected via ADD[2:0] = 010 in control register; shares same acquisition and conversion path as IN1. |
| 5 - IN1 | Analog Input Channel 1 | 0V to VA input range; default channel sampled after power-up; selected via ADD[2:0] = 000. |
| 6 - DIN | Serial Data Input | Loads 8-bit control register on rising SCLK edges during first 8 clocks of each frame; determines next channel to convert. |
| 7 - DOUT | Serial Data Output | MSB-first 12-bit straight-binary result clocked out on falling SCLK edges starting at cycle 5; tri-stated when CS is high. |
| 8 - SCLK | Serial Clock Input | Drives all timing: 3 cycles for track, 13 for hold/convert/readout; supports 3.2–8 MHz frequency with 30–70% duty cycle. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified (Grade 3) | Rated for −40°C to +85°C operation with CDM Class C2 - suitable for under-hood automotive sensors and industrial control modules. |
| Variable power management | CS-driven shutdown reduces current to 38 nA at 3.6V - eliminates need for external power gating in always-on monitoring nodes. |
| Single-supply operation | No external reference or negative rail required; VA serves as both supply and full-scale reference - simplifies BOM and layout. |
| SPI-compatible serial interface | Direct connection to MSP430, STM32, or C2000 DSPs without level shifters or protocol translation - cuts firmware overhead. |
| Channel-to-channel crosstalk | −86 dB at 40.2 kHz - prevents signal leakage between IN1 and IN2 in differential or ratiometric sensing applications. |
Applications
| Motor Phase Current Sensing | Automotive Cabin Pressure Monitoring |
|---|---|
|
Use Scenario: Real-time sampling of shunt voltage across dual-phase motor windings in BLDC inverters. IC Role / Device Role / Timing Role: Dual-channel ADC acquires synchronized IN1/IN2 samples at 500 ksps to reconstruct current waveforms with <1 µs inter-channel skew. Use Value: Enables field-oriented control (FOC) with 12-bit resolution and 72.5 dB SNR - improves torque ripple suppression by >3 dB vs. 10-bit alternatives. |
Use Scenario: Continuous pressure transducer readout in HVAC control units for cabin climate regulation. IC Role / Device Role / Timing Role: Converts analog outputs from piezoresistive pressure sensors (IN1) and temperature compensation thermistors (IN2) in alternating frames. Use Value: AEC-Q100 qualification and −40°C to +85°C operation ensure reliability across vehicle lifecycle; 0.14 µW shutdown extends module standby time. |
| Portable Battery Management Unit | Industrial PLC Analog Input Module |
|
Use Scenario: Simultaneous cell voltage and pack current monitoring in handheld test equipment for Li-ion packs. IC Role / Device Role / Timing Role: Uses IN1 for voltage divider output and IN2 for current-sense amplifier output; SPI interface minimizes MCU GPIO usage. Use Value: 3.0 mW active power at 3V enables >10-hour runtime on single-cell Li-ion; 8-pin VSSOP saves board area versus SOIC-16 alternatives. |
Use Scenario: High-density analog input card acquiring 4–8 channels via external multiplexing, with local signal conditioning. IC Role / Device Role / Timing Role: ADC122S051QIMM/NOPB serves as front-end digitizer per pair of conditioned signals, reducing FPGA resource load. Use Value: 200–500 ksps programmability allows dynamic throughput scaling; ±0.5 LSB INL meets IEC 61000-4-30 Class A accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADC122S021 | Lower max sample rate (200 ksps only); identical pinout, INL (±0.5 LSB), and supply range. | Targeted at cost-sensitive, lower-throughput systems like basic sensor nodes or legacy industrial interfaces. | Select when 200 ksps suffices and power budget allows 3.0 mW at 3V - avoids over-specifying speed. |
| ADC122S101 | Higher max sample rate (1 Msps); same architecture, package, and AEC-Q100 qualification; slightly higher power (4.5 mW @3V). | Required for ultrasonic flow metering or vibration analysis where >500 ksps capture is essential. | Choose when future-proofing for higher bandwidth or when system-level timing margins demand headroom beyond 500 ksps. |
Compared with ADC122S021 and ADC122S101, the ADC122S051QIMM/NOPB provides optimal balance of speed (200–500 ksps), power (3.0 mW/0.14 µW), and automotive qualification - making it the preferred choice for mid-tier real-time control and diagnostics where neither entry-level nor premium speed is required.
Availability
ADC122S051QIMM/NOPB is available at Aetrix Electronics and suitable for motor control systems, automotive cabin electronics, portable instrumentation, and industrial PLC analog input modules requiring stable component supply and AEC-Q100 compliance.
Supply support for ADC122S051QIMM/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 ICs.
The ADC122S051QIMM/NOPB belongs to TI's precision SAR ADC family designed for high-reliability, low-power, dual-channel data acquisition in automotive and industrial environments - emphasizing AEC-Q100 qualification, wide supply range, and SPI simplicity.
FAQ
What is the operating temperature range for ADC122S051QIMM/NOPB?
The ADC122S051QIMM/NOPB is specified for operation from −40°C to +85°C and is AEC-Q100 qualified (Grade 3), confirming its suitability for under-dash automotive modules and industrial control cabinets without derating. This range is validated across all electrical parameters including INL, SNR, and power consumption.
Does ADC122S051QIMM/NOPB require an external voltage reference?
No, ADC122S051QIMM/NOPB uses its VA supply pin as the internal reference - full-scale range is 0V to VA, with LSB = VA/4096. No external reference is needed, simplifying design and reducing component count. Bypassing VA with 1 µF + 0.1 µF capacitors near the pin is mandatory for SNR performance.
How does the ADC122S051QIMM/NOPB handle channel selection between IN1 and IN2?
Channel selection is controlled via the 3-bit ADD[2:0] field in the 8-bit control register loaded through DIN. IN1 is selected with ADD[2:0] = 000 (default after power-up); IN2 with 010. ADD[2:0] = 1xx is invalid and causes indeterminate DOUT behavior - firmware must avoid this code.
What is the minimum and maximum SCLK frequency supported by ADC122S051QIMM/NOPB?
The ADC122S051QIMM/NOPB supports SCLK frequencies from 3.2 MHz to 8 MHz for guaranteed AC performance (SNR, THD, SFDR). While functional outside this range per Operating Ratings, electrical characteristics are only ensured within this band - using 5 MHz SCLK enables reliable 500 ksps throughput with margin.
Is ADC122S051QIMM/NOPB pin-compatible with other devices in the ADC122Sxx1 family?
Yes, ADC122S051QIMM/NOPB is fully pin- and function-compatible with ADC122S021 and ADC122S101 per TI's documentation. All share identical 8-pin VSSOP footprint, pin functions, control register map, and serial timing - enabling drop-in replacement based on required sample rate (200/500/1000 ksps).
ADC122S051QIMM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 2
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-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 ~ 85°C
- Supplier Device Package:
- 8-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC122S051QIMM/NOPB FAQ
1.How can I place an order for ADC122S051QIMM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC122S051QIMM/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 ADC122S051QIMM/NOPB reliable?
The price and inventory of ADC122S051QIMM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC122S051QIMM/NOPB is usually 5 days.
3.What payment methods are accepted for ADC122S051QIMM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC122S051QIMM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC122S051QIMM/NOPB?
ADC122S051QIMM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC122S051QIMM/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 ADC122S051QIMM/NOPB?
For technical support, including ADC122S051QIMM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC122S051QIMM/NOPB requirements.
6.How does Aetrix verify that ADC122S051QIMM/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC122S051QIMM/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 ADC122S051QIMM/NOPB meets industry standards.
7.What is the process for return or replacement of ADC122S051QIMM/NOPB?
All ADC122S051QIMM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC122S051QIMM/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 ADC122S051QIMM/NOPB part is unused and in its original packaging.
Return procedure for ADC122S051QIMM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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