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Texas Instruments ADS9120IRGET
- Part No.:
- ADS9120IRGET
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ADS9120IRGET.pdf
- Description:
- IC ADC 16BIT SAR 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:453
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Product details
Overview
ADS9120IRGET from Texas Instruments is a 16-bit, 2.5MSPS successive approximation register (SAR) analog-to-digital converter with no-latency output, ±0.25LSB INL, 96dB SNR, and 15.5mW total power dissipation at full throughput. It operates over –40°C to +125°C and supports unipolar differential input ranges up to ±5V using an external 2.5V–5V reference independent of AVDD - enabling high-precision industrial motor control and test equipment signal acquisition.
For engineers reviewing the ADS9120IRGET datasheet, ADS9120IRGET pinout, ADS9120IRGET application, or ADS9120IRGET equivalent, key selection considerations include its enhanced-SPI (multiSPI™) interface requiring only 45MHz SCLK at 2.5MSPS, JESD8-7A-compliant 1.8V digital I/O, internal data parity for host validation, and VQFN-24 package with exposed thermal pad.
Technical Context
The ADS9120IRGET implements a charge-redistribution SAR architecture with fully differential sampling, internal conversion clocking, and automatic reconnection of input capacitors post-conversion. Its converter module accepts AINP/AINM differential inputs referenced to REFP/REFM and delivers 16-bit codes without pipeline delay.
The interface module supports three protocols: standard SPI (200MHz SCLK), enhanced-SPI (45MHz SCLK with parity), and source-synchronous modes (internal or external strobe). All digital I/Os comply with JESD8-7A at DVDD = 1.8V, and RVS provides real-time ADC status indication synchronized to CS or SCLK.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output levels for high-fidelity digitization of precision analog signals. |
| Sample Rate | 2.5MSPS - enables oversampling by ≥4× to improve effective resolution and noise floor in demanding measurement systems. |
| INL / DNL | ±0.25LSB / ±0.6LSB - ensures monotonicity and minimal code-dependent gain/offset error across full temperature range. |
| SNR / THD | 96dB / –118dB at 2kHz - supports >15.7 ENOB for clean spectral analysis in medical imaging and instrumentation. |
| Power Dissipation | 15.5mW total at 2.5MSPS - includes 9mW analog supply (AVDD) and 6.5mW digital/interface supply (DVDD), scalable via NAP/PD modes. |
| Reference Range | 2.5V to 5V on REFP–REFM - allows flexible full-scale input tuning without external scaling circuitry or dependency on AVDD voltage. |
| Operating Temp | –40°C to +125°C - fully specified for extended industrial environments including motor drives and embedded control units. |
Pinout & Package
ADS9120IRGET is housed in a 4mm × 4mm, 24-pin VQFN package (RGE) with exposed thermal pad recommended to be connected to GND for optimal thermal performance (RθJB = 8.9°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP / AINM | Analog input | Differential positive/negative inputs accepting ±VREF unipolar range; high-impedance sample-and-hold with 60pF input capacitance in acquisition mode. |
| REFP / REFM | Analog reference | Reference voltage terminals supporting 2.5V–5V range; independent of AVDD, enabling stable full-scale definition under varying supply conditions. |
| AVDD / DVDD | Power supply | Separate 1.8V analog (AVDD) and digital (DVDD) supplies - decoupling required per layout guidelines to maintain AC performance. |
| 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 interface | Enhanced-SPI-compatible signals: CS enables bus access, SCLK clocks data transfer, SDI accepts commands, SDO-x outputs 16-bit data + parity, RVS indicates conversion status. |
| RST | Digital input | Asynchronous active-low reset - forces all registers to default state and clears internal logic upon low pulse ≥100ns. |
| GND / NC / Thermal Pad | Supply / No-connect | Dual ground pins (AGND/DGND) must be tied together at single point; NC pins (3,6,12) left floating; thermal pad improves power dissipation and reliability. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency output | Delivers fully settled 16-bit conversion result immediately after completion - eliminates pipeline delay for real-time closed-loop control. |
| Enhanced-SPI (multiSPI™) | Reduces required SCLK frequency to 45MHz at 2.5MSPS while adding optional parity bits - simplifies PCB routing and timing closure with FPGAs/DSPs. |
| Internal data parity | Appends parity bit to each 16-bit output word - enables host-side error detection to improve system-level reliability in safety-critical applications. |
| Flexible low-power modes | NAP (500µA) and PD (1.8µW) states allow dynamic power scaling - maintains fast wake-up (<300ns NAP, <250µs PD) without sacrificing throughput agility. |
| JESD8-7A digital I/O | Guarantees 1.8V-compatible signaling with VIH ≥0.65DVDD and VOL ≤0.45V - ensures interoperability with modern low-voltage microcontrollers and ASICs. |
Applications
| Test and Measurement | Motor Control |
|---|---|
Use Scenario: High-speed oscilloscope front-end acquiring transient waveforms with sub-microsecond timing resolution. IC Role / Device Role / Timing Role: Primary SAR ADC capturing 2.5M samples/sec with no latency, feeding FPGA-based real-time FFT and trigger logic. Use Value: 96dB SNR and ±0.25LSB INL preserve signal integrity during multi-cycle averaging; 45MHz enhanced-SPI eases FPGA clock domain crossing. |
Use Scenario: Current sensing in three-phase inverter drives requiring synchronized sampling of multiple phases at switching frequencies up to 20kHz. IC Role / Device Role / Timing Role: Simultaneous dual-channel acquisition (via external multiplexer) with precise CONVST edge alignment for field-oriented control (FOC) algorithms. Use Value: –40°C to +125°C operation ensures stability in enclosed drive cabinets; low 15.5mW dissipation minimizes thermal load near power stages. |
| Medical Imaging | High-Precision Industrial |
Use Scenario: Ultrasound beamformer channel digitizing echo return signals with wide dynamic range and low harmonic distortion. IC Role / Device Role / Timing Role: High-linearity ADC interfacing to LNA and VGA stages, delivering 16-bit data with THD ≤–118dB at 2kHz for artifact-free image reconstruction. Use Value: Differential input rejects common-mode noise from high-voltage transducer pulsers; internal parity prevents corrupted pixel data in DICOM pipelines. |
Use Scenario: Precision weigh scale or strain gauge readout in factory automation where long-term offset drift must remain below 1µV/°C. IC Role / Device Role / Timing Role: Low-drift, high-resolution digitizer with dVOS/dT = 1µV/°C and GE/dT = 0.25ppm/°C - directly converting mV-level bridge outputs. Use Value: 2.5V–5V reference flexibility allows optimization for resolution vs. noise; extended temperature spec validates calibration stability across seasonal ambient shifts. |
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 |
|---|---|---|---|
| ADS9110IRGET | 18-bit, 2MSPS, pin-compatible variant with higher resolution but lower throughput and no enhanced-SPI parity support. | Better suited for static or low-bandwidth precision measurements (e.g., DC voltage standards) where 18-bit resolution outweighs 2.5MSPS requirement. | Select ADS9110IRGET when ENOB > 17.5 is mandatory and throughput ≤2MSPS suffices; retain same PCB layout but verify firmware compatibility with reduced SCLK rate. |
| AD7960BCPZ | 18-bit, 5MSPS, SPI-only interface (no parity), requires 3.3V DVDD and external reference buffer; higher power (34mW). | Targeted at ultra-high-speed data acquisition systems needing maximum speed and resolution, with less emphasis on low-voltage digital compatibility or built-in error checking. | Choose AD7960BCPZ when 5MSPS is essential and host can support 3.3V I/O and external reference conditioning; expect revised power delivery and layout due to higher current and noise sensitivity. |
Compared with ADS9120IRGET, ADS9110IRGET trades throughput and parity for resolution, while AD7960BCPZ delivers higher speed and resolution at the cost of increased power, voltage compatibility constraints, and absence of integrated parity - making ADS9120IRGET optimal for 2.5MSPS industrial systems prioritizing reliability, thermal efficiency, and 1.8V digital integration.
Availability
ADS9120IRGET is available at Aetrix Electronics and suitable for test and measurement instrumentation, motor control inverters, and medical ultrasound systems requiring stable component supply with guaranteed long-term manufacturability.
Supply support for ADS9120IRGET 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 ADC innovation and automotive-grade reliability validation.
The ADS9120IRGET belongs to TI's precision high-speed SAR ADC product line, engineered for industrial and medical applications demanding low latency, excellent DC/AC accuracy, and robust digital interfacing in thermally constrained environments.
FAQ
What is the maximum sample rate supported by the ADS9120IRGET?
The ADS9120IRGET supports a maximum sample rate of 2.5 million samples per second (2.5MSPS) with full 16-bit resolution and guaranteed AC/DC specifications. This throughput is achievable using either standard SPI (requiring 200MHz SCLK) or enhanced-SPI (requiring only 45MHz SCLK), and the device maintains ±0.25LSB INL and 96dB SNR at this rate. The ADS9120IRGET does not support oversampling beyond 2.5MSPS in continuous mode.
Does the ADS9120IRGET require an external reference voltage?
Yes, the ADS9120IRGET requires an external reference voltage applied between REFP and REFM pins. It supports a flexible 2.5V to 5V range, independent of AVDD voltage, allowing direct connection to precision reference ICs like REF5025 or REF5050. The device draws up to 1.3mA average reference current at 5V and 2.5MSPS, and internal reference buffering is not provided - external decoupling is mandatory per layout guidelines.
How does the enhanced-SPI interface of the ADS9120IRGET differ from standard SPI?
The enhanced-SPI (multiSPI™) interface of the ADS9120IRGET reduces required SCLK frequency to 45MHz at 2.5MSPS - versus 200MHz for standard SPI - by optimizing data framing and enabling simultaneous multi-bit transfers. It also supports optional parity bit appending to the 16-bit output word for host-side error detection. Unlike standard SPI, enhanced-SPI uses dedicated SDO-0 through SDO-3 lines and leverages RVS for precise timing synchronization, easing FPGA/DSP integration.
What power-saving modes are available on the ADS9120IRGET?
The ADS9120IRGET offers two low-power modes: NAP (Nap) mode draws 500µA and retains register state with <300ns wake-up time, and Power-Down (PD) mode draws just 1.8µW with <250µs wake-up. Both modes are entered via SPI command and reduce AVDD current significantly - from 6.5mA active to 3.7mA in static ACQ state, then further to µA/µW levels. These modes enable dynamic power scaling in battery-powered or thermally sensitive systems without compromising conversion fidelity upon exit.
Is the ADS9120IRGET compatible with 1.8V digital interfaces?
Yes, the ADS9120IRGET is fully compatible with 1.8V digital interfaces. Its DVDD supply operates at 1.8V (1.65V–1.95V range), and all digital I/Os - including CS, SCLK, SDI, SDO-0..3, and RVS - comply with JESD8-7A specifications: VIH ≥0.65DVDD (≥1.17V) and VOL ≤0.45V. This ensures reliable interoperability with 1.8V FPGAs, microcontrollers, and DSPs without level-shifting circuitry.
ADS9120IRGET 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:
- Internal Oscillator
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 24-VQFN (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS9120IRGET FAQ
1.How can I place an order for ADS9120IRGET through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS9120IRGET 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 ADS9120IRGET reliable?
The price and inventory of ADS9120IRGET are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS9120IRGET is usually 5 days.
3.What payment methods are accepted for ADS9120IRGET?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS9120IRGET transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS9120IRGET?
ADS9120IRGET orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS9120IRGET 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 ADS9120IRGET?
For technical support, including ADS9120IRGET datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS9120IRGET requirements.
6.How does Aetrix verify that ADS9120IRGET is sourced from the original manufacturer or authorized distributors?
All ADS9120IRGET 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 ADS9120IRGET meets industry standards.
7.What is the process for return or replacement of ADS9120IRGET?
All ADS9120IRGET units undergo pre-shipment inspection (PSI). If there is an issue with ADS9120IRGET, 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 ADS9120IRGET part is unused and in its original packaging.
Return procedure for ADS9120IRGET:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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