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Texas Instruments ADC122S051CIMM/NOPB
- Part No.:
- ADC122S051CIMM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADC122S051CIMM/NOPB.pdf
- Description:
- IC ADC 12BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,078
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Product details
Overview
ADC122S051CIMM/NOPB from Texas Instruments is a 12-bit, dual-channel successive-approximation ADC with SPI-compatible serial interface, operating at 200–500 ksps sample rates, 72.5 dB SNR (typ), ±0.5 LSB INL (typ), and 3.0 mW power consumption at 3V - used for precision analog monitoring in portable instrumentation and remote data acquisition systems.
For engineers reviewing the ADC122S051CIMM/NOPB datasheet, ADC122S051CIMM/NOPB pinout, ADC122S051CIMM/NOPB application, or ADC122S051CIMM/NOPB equivalent, key selection considerations include its 8-pin VSSOP package, dual-input multiplexed architecture, rail-to-rail input range (0V to VA), low-power shutdown mode (0.14 µW at 3V), and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The ADC122S051CIMM/NOPB implements a charge-redistribution DAC-based successive-approximation architecture with integrated track-and-hold. It supports single- or dual-channel conversion via internal 2:1 analog multiplexer controlled by a 3-bit address register loaded on DIN.
Serial communication uses SPI-compatible timing: CS initiates each 16-SCLK-frame conversion cycle; DOUT outputs 12-bit straight-binary data MSB-first starting on the 5th SCLK falling edge; DIN accepts channel-select bits on the first 8 rising SCLK edges after CS fall.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees monotonicity and full code coverage across temperature and supply range. |
| Sample Rate | 200–500 ksps - fully specified over this range, enabling flexible throughput tuning without performance degradation. |
| INL / DNL | ±0.5 LSB / +0.7/−0.4 LSB (typ) - ensures high DC accuracy for sensor calibration and closed-loop control feedback. |
| SNR | 72.5 dB (typ) at 40.2 kHz input - supports >11.7 ENOB for precision measurement of low-distortion analog signals. |
| Power Consumption | 3.0 mW at 3V / 10 mW at 5V (normal mode); 0.14 µW at 3V (shutdown) - enables battery-powered operation with rapid wake-up. |
| Analog Input Range | 0 V to VA - eliminates need for external level-shifting when VA supplies system rails or sensors. |
| Supply Voltage | +2.7 V to +5.25 V - interoperable with 3.3 V and 5 V logic domains and legacy industrial supplies. |
Pinout & Package
ADC122S051CIMM/NOPB is housed in an 8-pin VSSOP (DGK) package - 2.3 mm × 2.0 mm, 0.65 mm pitch, thermally enhanced with θJA = 250°C/W - suitable for space-constrained PCB layouts and thermal-aware designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Chip Select | Falling edge initiates conversion frame; high state enables power-down mode and tri-states DOUT. |
| 2 - VA | Analog Supply | +2.7 V to +5.25 V reference and supply; must be bypassed with 1 µF + 0.1 µF capacitors within 1 cm. |
| 3 - GND | Analog Ground | Common return for analog circuitry; requires low-impedance connection to minimize noise coupling. |
| 4 - IN2 | Analog Input Channel 2 | Single-ended input referenced to GND; voltage range 0 V to VA; shares internal T/H with IN1. |
| 5 - IN1 | Analog Input Channel 1 | Single-ended input referenced to GND; default channel on power-up; same electrical specs as IN2. |
| 6 - DIN | Serial Data Input | Loads 3-bit channel address (ADD2–ADD0) on rising SCLK edges during first 8 clocks of each frame. |
| 7 - DOUT | Serial Data Output | Outputs 12-bit conversion result MSB-first on falling SCLK edges; tri-stated when CS is high. |
| 8 - SCLK | Serial Clock | Master clock controlling conversion timing and data transfer; supports 50 kHz–16 MHz frequency range. |
Key Features
| Feature | Design Value |
|---|---|
| Two independent analog inputs | IN1 and IN2 share one SAR core via internal multiplexer - reduces BOM count and board area vs. dual standalone ADCs. |
| Variable power management | Hardware-controlled shutdown via CS high - cuts current to 38 nA (3.6 V), enabling microamp-level system sleep states. |
| Single-supply operation | Operates from 2.7 V to 5.25 V without external references or level shifters - simplifies power architecture in mixed-voltage systems. |
| AEC-Q100 qualified | Tested per AEC-Q100-011 C2 CDM classification - validated for automotive under-hood and infotainment applications. |
| SPI/QSPI/MICROWIRE compatibility | Native timing alignment with industry-standard serial protocols - enables direct interfacing with TI C2000, STM32, and ADI Blackfin DSPs. |
Applications
| Portable Instrumentation | Automotive Sensor Monitoring |
|---|---|
|
Use Scenario: Handheld multimeter acquiring voltage, current, and temperature readings with real-time display and battery life optimization. IC Role / Device Role / Timing Role: Dual-channel ADC digitizes front-end op-amp outputs and thermistor divider; 200–500 ksps sampling adapts to signal bandwidth and power budget. Use Value: 12-bit resolution and 72.5 dB SNR enable 4½-digit meter accuracy; 0.14 µW shutdown extends battery runtime between measurements. |
Use Scenario: Engine control unit monitoring throttle position, coolant temperature, and intake air pressure across multiple sensors. IC Role / Device Role / Timing Role: AEC-Q100-qualified ADC samples analog sensor outputs sequentially; SPI interface synchronizes with MCU DMA for deterministic latency. Use Value: Rail-to-rail input (0 V to VA) eliminates external biasing; ±0.5 LSB INL ensures consistent calibration across −40°C to +85°C operating range. |
| Industrial Remote I/O Module | Programmable Logic Controller Analog Input |
|
Use Scenario: DIN-rail mounted remote I/O node collecting 4–20 mA loop signals and thermocouple outputs in factory automation networks. IC Role / Device Role / Timing Role: ADC122S051CIMM/NOPB digitizes conditioned analog inputs; CS-driven frame timing enables synchronized multi-node sampling over RS-485. Use Value: 8-pin VSSOP footprint minimizes PCB area; 3.0 mW active power allows dense channel packing without thermal derating. |
Use Scenario: Modular PLC backplane slot accepting analog input cards for process control in chemical plants and water treatment facilities. IC Role / Device Role / Timing Role: Dual-channel converter interfaces with isolated signal conditioners; SPI daisy-chaining supports up to 8 ADCs per controller bus segment. Use Value: Straight-binary output simplifies firmware parsing; channel-to-channel crosstalk <−86 dB prevents interference between critical control loops. |
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 (50–200 ksps); identical pinout, resolution, and interface. | Better suited for low-bandwidth sensor monitoring where power efficiency at sub-200 ksps dominates. | Select ADC122S021 when system sampling requirement is ≤200 ksps and lower dynamic power is prioritized. |
| ADC122S101 | Higher max sample rate (500 ksps–1 Msps); identical pinout, resolution, and interface. | Required for wideband applications like motor phase current sensing or audio pre-processing. | Choose ADC122S101 when sustained throughput >500 ksps is needed without changing layout or firmware interface logic. |
Compared with ADC122S021 and ADC122S101, the ADC122S051CIMM/NOPB delivers optimal balance of speed (200–500 ksps), power (3.0 mW at 3V), and precision (±0.5 LSB INL), making it the default choice for mid-speed industrial and automotive data acquisition where both responsiveness and accuracy matter.
Availability
ADC122S051CIMM/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor monitoring, and industrial remote I/O requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for ADC122S051CIMM/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 automotive-grade IC design.
The ADC122S051CIMM/NOPB belongs to TI's precision SAR ADC product line, engineered for high-accuracy, low-power, and robust serial-interface analog-to-digital conversion in harsh environments including automotive, industrial, and portable systems.
FAQ
What is the maximum sample rate supported by the ADC122S051CIMM/NOPB?
The ADC122S051CIMM/NOPB is fully specified for continuous operation from 200 ksps up to 500 ksps. Its conversion time is fixed at 13 SCLK cycles, and throughput time is 16 SCLK cycles - meaning maximum rate depends on SCLK frequency (up to 8 MHz). At 500 ksps, the device maintains guaranteed INL (±1.1 LSB max) and SNR (69.2 dB min) across −40°C to +85°C.
Does the ADC122S051CIMM/NOPB require an external voltage reference?
No, the ADC122S051CIMM/NOPB uses its VA supply pin as the analog reference - eliminating need for external reference components. The full-scale range is 0 V to VA, and LSB size equals VA/4096. This simplifies design but requires clean, well-bypassed VA (1 µF + 0.1 µF) to preserve SNR and avoid gain error drift.
How does channel selection work on the ADC122S051CIMM/NOPB?
Channel selection is controlled via a 3-bit address (ADD2–ADD0) loaded into the ADC122S051CIMM/NOPB's control register on DIN during each 16-SCLK frame. Valid combinations are ADD[2:0] = 000 for IN1 (default on power-up) and 001 for IN2; 01x codes are invalid and cause indeterminate DOUT behavior. The address configures the next conversion, not the current one.
Is the ADC122S051CIMM/NOPB compatible with standard SPI interfaces?
Yes, the ADC122S051CIMM/NOPB supports SPI Mode 0 (CPOL = 0, CPHA = 0): data is sampled on SCLK rising edge (DIN) and shifted out on falling edge (DOUT), with CS acting as frame sync. It also interoperates with QSPI and MICROWIRE protocols due to identical timing structure and MSB-first straight-binary format - no firmware translation layer required.
What is the power-down current of the ADC122S051CIMM/NOPB at 3.6 V?
At VA = +3.6 V and TA = +25°C, the ADC122S051CIMM/NOPB draws 38 nA in shutdown mode (CS high). This ultra-low quiescent current enables energy harvesting and battery-backed systems to maintain years of standby operation - confirmed per Electrical Characteristics table in SNAS257E Rev. MARCH 2013.
ADC122S051CIMM/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:
- -
ADC122S051CIMM/NOPB FAQ
1.How can I place an order for ADC122S051CIMM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC122S051CIMM/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 ADC122S051CIMM/NOPB reliable?
The price and inventory of ADC122S051CIMM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC122S051CIMM/NOPB is usually 5 days.
3.What payment methods are accepted for ADC122S051CIMM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC122S051CIMM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC122S051CIMM/NOPB?
ADC122S051CIMM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC122S051CIMM/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 ADC122S051CIMM/NOPB?
For technical support, including ADC122S051CIMM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC122S051CIMM/NOPB requirements.
6.How does Aetrix verify that ADC122S051CIMM/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC122S051CIMM/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 ADC122S051CIMM/NOPB meets industry standards.
7.What is the process for return or replacement of ADC122S051CIMM/NOPB?
All ADC122S051CIMM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC122S051CIMM/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 ADC122S051CIMM/NOPB part is unused and in its original packaging.
Return procedure for ADC122S051CIMM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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