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Texas Instruments ADS9120IRGER
- Part No.:
- ADS9120IRGER
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ADS9120IRGER.pdf
- Description:
- IC ADC 16BIT SAR 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,746
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Product details
Overview
ADS9120IRGER from Texas Instruments is a 16-bit, 2.5MSPS successive approximation register (SAR) analog-to-digital converter optimized for high-precision, high-throughput industrial sensing. It delivers ±0.25LSB INL, 96dB SNR, and –118dB THD at 2.5MSPS with 15.5mW total power dissipation, operating across –40°C to +125°C in a 4mm × 4mm VQFN package. It serves as the front-end digitizer in motor control current loops and medical imaging signal chains.
For engineers reviewing the ADS9120IRGER datasheet, ADS9120IRGER pinout, ADS9120IRGER application, or ADS9120IRGER equivalent, this page provides verified technical context, validated pin functions, confirmed AC/DC performance specs, and real-world implementation guidance for FPGA- and DSP-based acquisition systems requiring low-latency, no-missing-code conversion.
Technical Context
The ADS9120IRGER employs charge-redistribution SAR architecture with internal conversion clocking, enabling true no-latency output and full 16-bit resolution without pipeline delay. Its unipolar differential input supports ±VREF range with 2.5V–5V externally applied reference voltage independent of AVDD, and features integrated sample-and-hold with 60pF input capacitance in acquisition mode.
It implements TI's multiSPI™ (Enhanced-SPI) interface supporting 45MHz SCLK at full 2.5MSPS throughput-reducing timing margin pressure versus standard SPI-and includes configurable data parity for host-side validation. JESD8-7A-compliant 1.8V digital I/O ensures interoperability with modern low-voltage logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonicity and no missing codes over full temperature range. |
| Sample Rate | 2.5MSPS - enables oversampling up to 125× for effective resolution enhancement in noise-sensitive applications. |
| INL / DNL | ±0.25LSB / ±0.6LSB - ensures linearity error remains below 0.0038% FSR, critical for closed-loop control accuracy. |
| SNR / THD | 96dB / –118dB at 2kHz - supports >15.7 ENOB for high-fidelity signal capture in medical imaging and test equipment. |
| Power Dissipation | 15.5mW total at 2.5MSPS - splits into 9mW analog (AVDD) and 6.5mW digital (DVDD), enabling thermal-aware PCB layout. |
| Reference Range | 2.5V to 5V - allows direct interfacing with precision voltage references without external scaling, reducing BOM count. |
| Operating Temp | –40°C to +125°C - fully specified for under-hood automotive subsystems and industrial motor drives. |
Pinout & Package
ADS9120IRGER is housed in a 24-pin VQFN package (RGE) with 4mm × 4mm footprint and exposed thermal pad. The thermal pad must be connected to GND for optimal thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP / AINM | Analog input | Differential analog input pair; accepts ±VREF unipolar range with common-mode centered at VREF/2. |
| REFP / REFM | Reference input | High-impedance reference voltage terminals; support 2.5V–5V external reference independent of supply rails. |
| AVDD / DVDD | Power supply | Separate 1.8V analog and digital supplies enable noise isolation; AVDD powers core ADC, DVDD powers interface logic. |
| CONVST | Digital input | Rising-edge-triggered conversion start; initiates sampling phase and transitions device from ACQ to CNV state. |
| CS / SCLK / SDI / SDO-0–3 / RVS | Digital I/O | MultiSPI™ interface pins: CS enables bus access, SCLK clocks data, SDI accepts commands, SDO-x outputs parallelized data + parity, RVS signals conversion status or strobe. |
| RST | Digital input | Asynchronous active-low reset; forces all registers to default state and clears internal state machines. |
| GND / NC / Thermal Pad | Supply / No-connect | Dual GND pins (AGND/DGND) require separate low-impedance paths; NC pins must remain unconnected; thermal pad must be soldered to GND plane. |
Key Features
| Feature | Design Value |
|---|---|
| No latency output | Delivers conversion result immediately after completion with zero pipeline delay-essential for real-time feedback control loops. |
| Enhanced-SPI (multiSPI™) | Enables 2.5MSPS throughput at only 45MHz SCLK (vs 200MHz for standard SPI), relaxing PCB trace length and timing closure constraints. |
| Data parity support | Appends parity bit to each 16-bit conversion word, allowing host processor to detect transmission errors without additional protocol overhead. |
| Flexible low-power modes | NAP mode draws 500µA and PD mode draws 1.8µW-enabling dynamic power scaling synchronized to system activity without sacrificing wake-up speed. |
| JESD8-7A-compliant I/O | Guarantees 1.8V digital interface compatibility with TI C2000™ MCUs, Xilinx Artix-7 FPGAs, and ADI SHARC DSPs without level-shifting circuitry. |
Applications
| Motor Control Current Sensing | Medical Ultrasound Beamforming |
|---|---|
Use Scenario: Real-time phase current sampling in three-phase inverter drives for field-oriented control (FOC). IC Role / Device Role / Timing Role: High-speed, low-latency ADC capturing synchronized current waveforms at ≥20ksps per channel with deterministic timing. Use Value: ±0.25LSB INL and 96dB SNR ensure <0.1% torque ripple and precise flux estimation under PWM switching noise. |
Use Scenario: Digitizing echo return signals from piezoelectric transducer arrays in portable ultrasound systems. IC Role / Device Role / Timing Role: Front-end SAR ADC delivering clean 16-bit samples at 2.5MSPS for digital beam synthesis and Doppler processing. Use Value: –118dB THD preserves harmonic content of weak echo signals, enabling accurate tissue characterization and blood flow velocity calculation. |
| Industrial PLC Analog Input Modules | Automotive Battery Management Systems |
Use Scenario: High-density analog input cards in programmable logic controllers requiring simultaneous sampling of multiple sensor channels. IC Role / Device Role / Timing Role: Precision SAR ADC with flexible reference and wide temperature range for ruggedized factory-floor deployment. Use Value: Fully specified operation from –40°C to +125°C and 2.5V–5V reference support eliminate need for external gain/level-shift stages in multi-range modules. |
Use Scenario: Cell voltage monitoring in high-voltage traction battery packs where accuracy and reliability are safety-critical. IC Role / Device Role / Timing Role: Isolated ADC interface capturing cell voltages with galvanic separation and CRC-protected data transfer. Use Value: Data parity feature enables end-to-end integrity checking between ADC and isolated microcontroller, meeting ASIL-B functional safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS9110IRGER | 18-bit resolution, 2MSPS, pin-compatible but lower throughput and higher power per sample (18mW at 2MSPS). | Better DC precision for static measurements; unsuitable for >2MSPS real-time control loops. | Select ADS9110IRGER when ENOB >16.5 is required and throughput ≤2MSPS suffices. |
| AD7960BCPZ | 18-bit, 5MSPS, requires external reference and 3.3V/1.8V dual supplies; no built-in parity or NAP mode. | Higher speed and resolution but demands more complex power sequencing and error-checking firmware. | Choose AD7960BCPZ only when 5MSPS is mandatory and system can accommodate added design complexity. |
Compared with ADS9120IRGER, ADS9110IRGER trades throughput for resolution in the same package, while AD7960BCPZ offers higher speed but lacks integrated low-power modes and parity-making ADS9120IRGER the optimal balance of speed, precision, power efficiency, and robustness for industrial and medical edge devices.
Availability
ADS9120IRGER is available at Aetrix Electronics and suitable for motor control, medical imaging, and industrial PLC applications requiring stable component supply, extended temperature operation, and long-term production continuity.
Supply support for ADS9120IRGER 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 over 50 years of innovation in precision data converters.
The ADS9120IRGER belongs to TI's high-performance SAR ADC product line, designed specifically for demanding industrial, medical, and test equipment applications where speed, accuracy, and low power must coexist in compact form factors.
FAQ
What is the maximum sample rate supported by the ADS9120IRGER?
The ADS9120IRGER supports a maximum sample rate of 2.5 million samples per second (2.5MSPS) under recommended operating conditions (AVDD = 1.8V, DVDD = 1.8V, VREF = 5V). This rate is achievable using the Enhanced-SPI interface with a 45MHz SCLK, and the device maintains full 16-bit performance-including ±0.25LSB INL and 96dB SNR-at this throughput. The ADS9120IRGER does not support oversampling beyond its rated maximum.
Does the ADS9120IRGER require an external reference voltage?
Yes, the ADS9120IRGER requires an external reference voltage applied between REFP and REFM pins. It supports a reference range of 2.5V to 5V, independent of AVDD, enabling flexible system-level voltage scaling. The device draws up to 1.3mA average reference current at 5V and 2.5MSPS, and the reference must be low-noise and well-decoupled to maintain 96dB SNR performance. No internal reference is provided.
How does the Enhanced-SPI interface of the ADS9120IRGER differ from standard SPI?
The ADS9120IRGER's Enhanced-SPI (multiSPI™) interface achieves 2.5MSPS throughput at only 45MHz SCLK-compared to 200MHz required for standard SPI-by using source-synchronous data strobing and parallelized data lanes (SDO-0 through SDO-3). It also supports optional parity bit insertion and configurable data alignment, reducing timing margin pressure and simplifying FPGA/DSP firmware integration versus conventional SPI implementations.
What power-saving modes are available on the ADS9120IRGER?
The ADS9120IRGER offers two hardware-controlled low-power modes: NAP mode (500µA quiescent current) and Power-Down (PD) mode (1.8µW). NAP mode retains register state and enables sub-300ns wake-up to full operation; PD mode resets internal logic and requires longer 250µs recovery. Both modes are activated via dedicated control bits and reduce total power consumption proportionally to throughput demand without compromising conversion integrity.
Is the ADS9120IRGER pin-compatible with any other ADCs in TI's portfolio?
Yes, the ADS9120IRGER is pin-compatible with the ADS9110IRGER-a 18-bit, 2MSPS variant in the same RGE package. Both share identical pin configuration, power domains, reference interface, and multiSPI™ protocol structure. This allows designers to upgrade resolution without PCB redesign, though throughput and power profiles differ. No other TI ADCs outside this family offer direct pin compatibility with the ADS9120IRGER.
ADS9120IRGER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 2.5M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 1.65V ~ 1.95V
- Voltage - Supply, Digital:
- 1.65V ~ 1.95V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 24-VQFN (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS9120IRGER FAQ
1.How can I place an order for ADS9120IRGER through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS9120IRGER 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 ADS9120IRGER reliable?
The price and inventory of ADS9120IRGER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS9120IRGER is usually 5 days.
3.What payment methods are accepted for ADS9120IRGER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS9120IRGER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS9120IRGER?
ADS9120IRGER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS9120IRGER 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 ADS9120IRGER?
For technical support, including ADS9120IRGER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS9120IRGER requirements.
6.How does Aetrix verify that ADS9120IRGER is sourced from the original manufacturer or authorized distributors?
All ADS9120IRGER 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 ADS9120IRGER meets industry standards.
7.What is the process for return or replacement of ADS9120IRGER?
All ADS9120IRGER units undergo pre-shipment inspection (PSI). If there is an issue with ADS9120IRGER, 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 ADS9120IRGER part is unused and in its original packaging.
Return procedure for ADS9120IRGER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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