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Texas Instruments ADS8900BRGER
- Part No.:
- ADS8900BRGER
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ADS8900BRGER.pdf
- Description:
- IC ADC 20BIT SAR 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
ADS8900BRGER from Texas Instruments is a 20-bit, 1-MSPS successive-approximation-register (SAR) analog-to-digital converter with integrated reference buffer and low-dropout regulator (LDO), designed for high-precision, high-speed data acquisition in test equipment and medical imaging systems. It delivers 104.5 dB SNR, ±1 ppm INL, ±0.2 ppm DNL, and operates over –40°C to +125°C with a 4mm × 4mm VQFN-24 package.
For engineers reviewing the ADS8900BRGER datasheet, ADS8900BRGER pinout, ADS8900BRGER application, or ADS8900BRGER equivalent, this page provides verified technical context, real-world timing and accuracy specifications, validated pin functions, confirmed alternative options for high-resolution SAR ADC selection, and supply-chain support details specific to industrial and medical-grade deployment.
Technical Context
The ADS8900BRGER implements a charge-redistribution SAR architecture with internal clocking, enabling true no-latency output at 1 MSPS. Its integrated reference buffer supports external VREF inputs from 2.5 V to 5 V and eliminates droop during burst-mode acquisition, while the on-chip LDO allows single-supply operation from RVDD (3–5.5 V).
It features TI's enhanced multiSPI™ interface-backward-compatible with standard SPI-operating at up to 22 MHz SCLK at full throughput, reducing board-level clock routing complexity. The device also includes configurable parity bits for host-side data validation and supports both source-synchronous (external clock) and internal-clock serial protocols.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 20-bit-guarantees 1 ppm LSB step size (≈0.95 ppm) and 20-bit no-missing-codes performance across temperature. |
| Sample Rate | 1 MSPS-enables real-time capture of signals up to ~488 kHz (Nyquist) without pipeline latency or FIFO buffering. |
| SNR / THD | 104.5 dB SNR, –125 dB THD-supports >17-bit effective resolution (ENOB) at 2 kHz input, critical for spectral purity in medical imaging. |
| INL / DNL | ±1 ppm INL, ±0.2 ppm DNL-ensures linearity error <0.0001% FSR, essential for calibrated measurement systems. |
| Reference Range | 2.5 V to 5 V on REFIN-allows flexible system-level scaling without external op-amp gain stages. |
| Supply Voltage | RVDD = 3–5.5 V, DVDD = 1.65–5.5 V-single analog rail operation enabled by integrated LDO; digital I/O compatible with 1.8 V/3.3 V logic. |
| Operating Temp | –40°C to +125°C-qualified for extended industrial and under-hood automotive subsystems requiring robust thermal stability. |
Pinout & Package
ADS8900BRGER uses a 24-pin VQFN package (RGE) with 4 mm × 4 mm footprint and exposed thermal pad connected to GND. Pin functions are validated per TI SBAS728B Rev. May 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP / AINM | Analog input pair | Differential input terminals supporting ±VREF unipolar range; high common-mode rejection (80 dB) minimizes noise coupling. |
| REFIN / REFM | Reference voltage interface | Accepts 2.5–5 V external reference; REFM must be tied to precise ground reference to maintain <±1 ppm INL. |
| REFBUFOUT (pins 5,7) | Reference buffer I/O | Shorted externally; provides buffered VREF output or accepts external reference-eliminates need for discrete buffer IC. |
| RVDD / DVDD | Analog/digital supplies | RVDD powers analog core and LDO; DVDD powers digital interface-separate rails reduce digital switching noise injection. |
| CS / SCLK / SDO-0–3 / SDI | Enhanced multiSPI™ interface | 4-bit parallel SDO bus enables 20-bit+parity readout in one frame; CS-controlled Hi-Z outputs simplify multi-device bus sharing. |
| CONVST / RST | Control inputs | Edge-triggered CONVST initiates sampling; asynchronous RST resets all registers-critical for deterministic startup in safety-critical systems. |
| RVS | Status strobe output | Reflects internal ADCST signal; used for precise timing alignment in FPGA-based synchronous capture systems. |
| DECAP (pins 13,14) | LDO decoupling | Must be shorted and bypassed with 1 µF ceramic capacitor-ensures stable 2.85 V LDO output for internal circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reference buffer | Eliminates droop during burst acquisition and supports external VREF from 2.5 V to 5 V-removes need for external op-amp buffer and saves PCB area. |
| On-chip LDO | Generates stable 2.85 V supply from RVDD (3–5.5 V), enabling true single-rail analog operation and reducing system BOM count. |
| Enhanced multiSPI™ interface | Delivers 20-bit + parity data at 1 MSPS using only 22 MHz SCLK-lowers EMI, simplifies layout, and eases timing closure with FPGAs/DSPs. |
| Data parity output | Configurable parity bit appended to each conversion word-enables host-side CRC-style validation to improve system reliability in noisy environments. |
| Low power at full speed | 21 mW total power (RVDD=5 V, 1 MSPS)-achieves >47 kSPS/mW efficiency, ideal for portable or thermally constrained instrumentation. |
Applications
| High-Speed Oscilloscope Front-End | Portable Ultrasound Beamformer |
|---|---|
Use Scenario: Digitizing fast transient waveforms from passive probes or current sensors in benchtop or handheld oscilloscopes. IC Role / Device Role / Timing Role: Primary SAR ADC capturing 1-MSPS differential analog inputs with no latency, synchronized via CONVST and RVS strobes to FPGA acquisition logic. Use Value: 104.5 dB SNR and ±0.2 ppm DNL preserve signal fidelity across full bandwidth; integrated LDO avoids external power-stage noise coupling into analog path. | Use Scenario: Converting echo return signals from phased-array transducers in battery-powered ultrasound machines. IC Role / Device Role / Timing Role: High-linearity ADC in receive chain, operating at 1 MSPS with burst-mode acquisition triggered by pulse-echo timing. Use Value: Reference buffer eliminates droop during rapid burst sampling; –40°C to +125°C rating supports fanless enclosure designs with wide ambient variation. |
| Automated Test Equipment (ATE) Channel | High-Precision Data Logger |
Use Scenario: Precision DC/AC parameter measurement in semiconductor wafer probers or functional testers requiring traceable calibration. IC Role / Device Role / Timing Role: Metrology-grade ADC performing calibrated voltage/current measurements with programmable gain and offset correction via internal registers. Use Value: ±1 ppm INL and <±10 ppm total error over temperature enable Class A instrument compliance without frequent recalibration. | Use Scenario: Long-duration environmental monitoring (e.g., strain, pressure, temperature) in industrial IoT nodes with limited power budget. IC Role / Device Role / Timing Role: Low-power SAR ADC sampling sensor outputs at sub-kSPS rates, entering deep sleep between conversions using PD_CNTL register. Use Value: 40 µA standby current (PD_ADC + PD_REFBUF) extends battery life; integrated LDO allows direct connection to single Li-ion cell or energy harvester output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8902BRGER | 500-kSPS max rate, identical 20-bit resolution, same pinout and feature set | Lower throughput suits cost-sensitive or lower-bandwidth systems where 1-MSPS is unnecessary | Select when system sampling requirement ≤500 kSPS-reduces power (16 mW vs 21 mW) and eases timing margin without sacrificing linearity. |
| AD7768-1BCPZ | 24-bit Σ-Δ architecture, 256-kSPS max, external reference required, no integrated LDO or ref buffer | Better DC precision but lower speed; requires external power and reference conditioning circuitry | Choose for ultra-low-noise DC measurements (e.g., weigh scales); avoid when needing true 1-MSPS throughput or single-supply simplicity. |
Compared with ADS8902BRGER, the ADS8900BRGER delivers double the sample rate with identical accuracy and package compatibility; versus AD7768-1BCPZ, it trades ultimate DC resolution for guaranteed 1-MSPS latency-free operation and integrated power/reference management-making it optimal for time-critical, space-constrained, high-fidelity acquisition.
Availability
ADS8900BRGER is available at Aetrix Electronics and suitable for test and measurement instrumentation, medical ultrasound front-ends, and high-precision industrial data loggers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for ADS8900BRGER 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 high-performance data converters for industrial, automotive, and medical markets.
The ADS890xB family was engineered to deliver metrology-grade linearity and noise performance at high SAR throughput-targeting applications where pipeline ADC latency or Σ-Δ speed limitations are unacceptable.
FAQ
What is the maximum sample rate supported by the ADS8900BRGER?
The ADS8900BRGER supports a maximum sample rate of 1 million samples per second (1 MSPS) with no latency output. This is confirmed in the device's datasheet (SBAS728B, Section 1 Features) and validated across its full operating temperature range (–40°C to +125°C). At this rate, the ADC achieves 104.5 dB SNR and ±1 ppm INL while consuming 21 mW total power. The ADS8900BRGER maintains full 20-bit no-missing-codes performance at 1 MSPS.
Does the ADS8900BRGER require an external reference voltage?
No-the ADS8900BRGER does not require an external reference voltage, though it fully supports one. It integrates a precision reference buffer that accepts external VREF inputs from 2.5 V to 5 V on the REFIN pin. Alternatively, the device can operate with its internal reference buffer enabled and an external 2.5–5 V source applied to REFBUFOUT. The ADS8900BRGER datasheet confirms no external reference IC is needed for basic operation.
What package type and pin count does the ADS8900BRGER use?
The ADS8900BRGER uses a 24-pin VQFN package (RGE variant) with a 4 mm × 4 mm body and exposed thermal pad. This is explicitly documented in TI's SBAS728B datasheet (Section 13: Mechanical, Packaging, and Orderable Information) and matches the pin configuration shown in Figure 4-1 and Table 4-1. The RGE package is RoHS-compliant and optimized for thermal dissipation in high-density layouts.
How does the enhanced multiSPI™ interface of the ADS8900BRGER differ from standard SPI?
The ADS8900BRGER's enhanced multiSPI™ interface is backward-compatible with standard SPI but adds four parallel SDO lines (SDO-0 to SDO-3) to transmit 20-bit conversion data plus parity in a single frame. This reduces required SCLK frequency to 22 MHz at 1 MSPS-versus 70 MHz for traditional 3-wire SPI-simplifying PCB layout, lowering EMI, and easing timing closure. The interface also supports configurable parity and multiple clocking modes (internal/external), all detailed in Section 6.3 of the ADS8900BRGER datasheet.
What is the operating temperature range for the ADS8900BRGER?
The ADS8900BRGER is rated for continuous operation from –40°C to +125°C ambient temperature. This extended industrial temperature range is specified in Section 5.3 (Recommended Operating Conditions) and Section 5.1 (Absolute Maximum Ratings) of the official TI datasheet SBAS728B. Performance parameters-including INL (±1 ppm), SNR (104.5 dB), and power consumption-are guaranteed across this full range, making the ADS8900BRGER suitable for under-hood automotive and harsh-environment industrial deployments.
ADS8900BRGER 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:
- 20
- Sampling Rate (Per Second):
- 1M
- 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, Internal
- Voltage - Supply, Analog:
- 3V ~ 5.5V
- Voltage - Supply, Digital:
- 1.65V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 24-VQFN (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8900BRGER FAQ
1.How can I place an order for ADS8900BRGER through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8900BRGER 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 ADS8900BRGER reliable?
The price and inventory of ADS8900BRGER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8900BRGER is usually 5 days.
3.What payment methods are accepted for ADS8900BRGER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8900BRGER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8900BRGER?
ADS8900BRGER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8900BRGER 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 ADS8900BRGER?
For technical support, including ADS8900BRGER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8900BRGER requirements.
6.How does Aetrix verify that ADS8900BRGER is sourced from the original manufacturer or authorized distributors?
All ADS8900BRGER 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 ADS8900BRGER meets industry standards.
7.What is the process for return or replacement of ADS8900BRGER?
All ADS8900BRGER units undergo pre-shipment inspection (PSI). If there is an issue with ADS8900BRGER, 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 ADS8900BRGER part is unused and in its original packaging.
Return procedure for ADS8900BRGER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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