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Texas Instruments ADC122S051CIMMX/NOPB
- Part No.:
- ADC122S051CIMMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADC122S051CIMMX/NOPB.pdf
- Description:
- IC ADC 12BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,579
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Product details
Overview
ADC122S051CIMMX/NOPB from Texas Instruments is a 12-bit, dual-channel successive-approximation ADC with SPI-compatible serial interface, 200–500 ksps sample rate, ±0.5 LSB typical INL, and 72.5 dB typical SNR. It operates from a single 2.7V–5.25V supply and supports track-and-hold acquisition on two independent analog inputs (IN1/IN2) for embedded sensor monitoring and industrial data acquisition.
For engineers reviewing the ADC122S051CIMMX/NOPB datasheet, ADC122S051CIMMX/NOPB pinout, ADC122S051CIMMX/NOPB application, or ADC122S051CIMMX/NOPB equivalent, this page delivers verified electrical specs, validated VSSOP-8 pin mapping, real-world use cases in portable instrumentation and remote sensing, and two confirmed pin-compatible alternatives per TI's official compatibility table.
Technical Context
The ADC122S051CIMMX/NOPB implements a charge-redistribution DAC architecture with internal track-and-hold, enabling precise sampling of either IN1 or IN2 under software control via its 8-bit control register. Its conversion timing is fully synchronous to SCLK, requiring exactly 16 clock cycles per frame (3 for track, 13 for hold/convert/readout), with MSB-first straight-binary output on DOUT.
It features variable power management: normal mode draws 3.0 mW at 3V/500 ksps, while CS-high shutdown reduces consumption to 0.14 µW. The device uses VA as both supply and reference, making it sensitive to supply noise-hence TI specifies mandatory 1 µF + 0.1 µF local bypassing at the VA pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes-guarantees monotonicity and full-scale linearity across all operating conditions. |
| Sample Rate | 200–500 ksps range-fully specified across this band, not just at one point, enabling flexible throughput tuning in firmware. |
| INL / DNL | ±0.5 LSB / +0.7/−0.4 LSB typical-ensures <0.012% full-scale error for precision sensor digitization. |
| SNR / SFDR | 72.5 dB / 86 dB typical at 40.2 kHz-supports >11.7 ENOB for high-fidelity signal capture in noisy environments. |
| Supply Range | +2.7V to +5.25V single supply-enables direct interfacing with 3.3V or 5V microcontrollers without level-shifting. |
| Power (3V) | 3.0 mW active / 0.14 µW shutdown-facilitates ultra-low-power operation in battery-powered remote nodes. |
| Interface | SPI/QSPI/MICROWIRE-compatible 3-wire serial (CS/SCLK/DOUT/DIN)-reduces MCU GPIO count and simplifies PCB routing. |
Pinout & Package
ADC122S051CIMMX/NOPB is housed in an 8-lead VSSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), optimized for space-constrained industrial and portable designs. Thermal resistance θJA = 250°C/W requires minimal copper area for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Chip Select input | Falling edge initiates conversion frame; high state enables power-down mode and tri-states DOUT. |
| 2 - VA | Analog supply & reference | +2.7V to +5.25V supply; also serves as ADC reference-requires tight local decoupling (1 µF + 0.1 µF). |
| 3 - GND | Analog ground return | Common reference for analog inputs and internal circuitry; must be connected to clean system ground plane. |
| 4 - IN2 | Second analog input | 0V to VA range; selected via ADD[2:0] bits in control register; shares same T/H and ADC core as IN1. |
| 5 - IN1 | Primary analog input | 0V to VA range; default channel after power-up; multiplexed with IN2 using internal analog switch. |
| 6 - DIN | Serial data input | Loads 8-bit control register on rising SCLK edges; configures next conversion's input channel (ADD0–ADD2). |
| 7 - DOUT | Serial data output | MSB-first 12-bit straight-binary result clocked out on falling SCLK edges; tri-stated when CS is high. |
| 8 - SCLK | Serial clock input | Master clock driving conversion timing and data transfer; frequency range 50 kHz–16 MHz; duty cycle 30–70%. |
Key Features
| Feature | Design Value |
|---|---|
| Two independent analog inputs | IN1 and IN2 share one 12-bit SAR core but support sequential or alternating sampling-reduces component count vs. dual standalone ADCs. |
| Full-speed specification range | 200–500 ksps performance guaranteed across entire range-not interpolated-enables deterministic real-time firmware scheduling. |
| Low-power shutdown mode | 0.14 µW at 3V eliminates quiescent drain in sleep states-critical for multi-year battery life in wireless sensor nodes. |
| AEC-Q100 qualified (Q-grade variant) | ADC122S051Q meets automotive Grade 2 (−40°C to +105°C) requirements-validates robustness for industrial control applications. |
| Single-supply operation | No external reference or negative rail needed-simplifies power design and reduces BOM cost in 3.3V/5V systems. |
Applications
| Portable Data Loggers | Industrial Sensor Interfaces |
|---|---|
|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure over weeks. IC Role / Device Role / Timing Role: Dual-channel ADC digitizes analog sensor outputs sequentially, synchronized to low-power MCU wake cycles. Use Value: 0.14 µW shutdown current extends battery life; 12-bit resolution captures sub-degree thermal changes without oversampling. |
Use Scenario: PLC analog input modules conditioning signals from strain gauges, RTDs, and 4–20 mA transmitters. IC Role / Device Role / Timing Role: Front-end converter providing isolated, calibrated digitization with configurable channel selection via SPI. Use Value: ±0.5 LSB INL ensures <0.012% measurement accuracy; 72.5 dB SNR rejects EMI in electrically noisy factory floors. |
| Remote Telemetry Units | Test & Measurement Equipment |
|
Use Scenario: Solar-powered field units transmitting vibration and current data from wind turbines via LoRaWAN. IC Role / Device Role / Timing Role: Low-power ADC samples motor current and accelerometer outputs at 200 ksps, then enters shutdown until next transmission. Use Value: Single 3.3V supply eliminates DC/DC converters; SPI interface minimizes MCU pin usage and firmware overhead. |
Use Scenario: Benchtop multimeters and oscilloscope front-ends requiring stable, repeatable DC and AC measurements. IC Role / Device Role / Timing Role: Precision digitizer capturing calibrated reference signals with minimal code-dependent nonlinearity. Use Value: No missing codes and 86 dB SFDR suppress spurious artifacts below −80 dBc-critical for spectral purity validation. |
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 | Slower max sample rate (50–200 ksps); identical pinout, control register, and VSSOP-8 package. | Better suited for low-throughput applications like slow-scan thermocouple monitoring where power efficiency dominates speed. | Select ADC122S021 when 200 ksps is sufficient and lower dynamic power at reduced clock rates is prioritized. |
| ADC122S101 | Faster max sample rate (500 ksps–1 Msps); identical pinout, control register, and VSSOP-8 package. | Required for high-speed waveform capture (e.g., motor phase current analysis) where >500 ksps resolution is mandatory. | Choose ADC122S101 when system-level timing demands >500 ksps sustained throughput without sacrificing 12-bit linearity. |
Compared with ADC122S021 and ADC122S101, the ADC122S051CIMMX/NOPB uniquely balances mid-range speed (200–500 ksps), ultra-low shutdown power (0.14 µW), and guaranteed 12-bit monotonicity-making it optimal for portable industrial sensors needing both responsiveness and multi-year battery life.
Availability
ADC122S051CIMMX/NOPB is available at Aetrix Electronics and suitable for portable data loggers, industrial sensor interfaces, and remote telemetry units requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ADC122S051CIMMX/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, embedded processing, and connectivity technologies, with decades of expertise in precision data converters and industrial-grade ICs.
The ADC122S051CIMMX/NOPB belongs to TI's precision SAR ADC product line, engineered for high-accuracy, low-power, and easy-to-integrate analog-to-digital conversion in space- and energy-constrained embedded systems.
FAQ
What is the maximum sample rate supported by the ADC122S051CIMMX/NOPB?
The ADC122S051CIMMX/NOPB is fully specified for continuous operation from 200 ksps up to 500 ksps. Unlike many ADCs rated only at a single speed, its key parameters-including INL, SNR, and THD-are guaranteed across this entire range, enabling reliable firmware-driven throughput scaling without performance degradation.
Does the ADC122S051CIMMX/NOPB require an external voltage reference?
No. The ADC122S051CIMMX/NOPB uses its VA supply pin as both power source and reference voltage. This eliminates the need for an external reference, simplifying design and reducing BOM cost-but mandates strict VA supply filtering (1 µF + 0.1 µF capacitors within 1 cm) to maintain 72.5 dB SNR performance.
How is channel selection implemented on the ADC122S051CIMMX/NOPB?
Channel selection is controlled via the 3-bit ADD[2:0] field in the 8-bit control register loaded through the DIN pin. Writing '000' selects IN1 (default after power-up), '001' selects IN2, and '01x' is invalid. The selected channel is sampled during the *next* conversion frame, enabling deterministic sequencing.
What is the power consumption of the ADC122S051CIMMX/NOPB in shutdown mode?
In shutdown mode (CS high), the ADC122S051CIMMX/NOPB draws just 0.14 µW at +3V supply and 0.32 µW at +5V supply. This ultra-low quiescent power enables multi-year battery operation in intermittent-sampling applications such as wireless sensor networks and environmental monitors.
Is the ADC122S051CIMMX/NOPB compatible with standard SPI interfaces?
Yes. The ADC122S051CIMMX/NOPB supports SPI, QSPI, and MICROWIRE protocols using a 3-wire serial interface (CS, SCLK, DOUT/DIN). It outputs MSB-first straight-binary data on DOUT at falling SCLK edges and accepts control register writes on DIN at rising SCLK edges-matching standard SPI master timing.
ADC122S051CIMMX/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:
- -
ADC122S051CIMMX/NOPB FAQ
1.How can I place an order for ADC122S051CIMMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC122S051CIMMX/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 ADC122S051CIMMX/NOPB reliable?
The price and inventory of ADC122S051CIMMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC122S051CIMMX/NOPB is usually 5 days.
3.What payment methods are accepted for ADC122S051CIMMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC122S051CIMMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC122S051CIMMX/NOPB?
ADC122S051CIMMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC122S051CIMMX/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 ADC122S051CIMMX/NOPB?
For technical support, including ADC122S051CIMMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC122S051CIMMX/NOPB requirements.
6.How does Aetrix verify that ADC122S051CIMMX/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC122S051CIMMX/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 ADC122S051CIMMX/NOPB meets industry standards.
7.What is the process for return or replacement of ADC122S051CIMMX/NOPB?
All ADC122S051CIMMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC122S051CIMMX/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 ADC122S051CIMMX/NOPB part is unused and in its original packaging.
Return procedure for ADC122S051CIMMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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