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Texas Instruments ADS7230IRSAR
- Part No.:
- ADS7230IRSAR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ADS7230IRSAR.pdf
- Description:
- IC ADC 12BIT SAR 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,761
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Product details
Overview
ADS7230IRSAR from Texas Instruments is a 12-bit, 1-MSPS successive approximation register (SAR) analog-to-digital converter with dual unipolar input channels (+IN0/+IN1), integrated conversion clock, and SPI/DSP-compatible serial interface. It operates from 2.7V to 5.5V analog supply, delivers ±0.5 LSB max INL/DNL, and supports daisy-chain mode for multi-ADC systems in industrial data acquisition.
For engineers reviewing the ADS7230IRSAR datasheet, ADS7230IRSAR pinout, ADS7230IRSAR application, or ADS7230IRSAR equivalent, key selection criteria include dual-channel auto/manual channel select, programmable TAG bit output, EOC/INT polarity control, and compatibility with low-power 1.65V–5.5V I/O supplies.
Technical Context
The ADS7230IRSAR implements a capacitor-based SAR architecture with built-in sample-and-hold and a 2-to-1 multiplexer enabling sequential sampling of two independent unipolar inputs (0V to VREF). Its internal 21–24.5 MHz conversion clock eliminates external timing components.
It supports three power-down modes (deep, nap, auto-nap), global CONVST independent of CS, and configurable EOC/INT output with programmable polarity and duration-enabling flexible synchronization in real-time control loops and synchronized multi-device acquisition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 part in 4096 quantization granularity for precision sensor digitization |
| Sampling Rate | 1 MSPS at +VA ≥3V - enables real-time capture of signals up to ~400 kHz Nyquist bandwidth |
| INL / DNL | ±0.5 LSB max - ensures monotonicity and <0.012% full-scale linearity error in closed-loop feedback |
| Offset Error | ±0.8 mV max at 3V supply - reduces calibration burden in low-voltage transducer interfaces |
| SNR / SFDR | 73.9 dB / 93.4 dB at 10 kHz - supports high-fidelity measurement of small-signal AC waveforms |
| Supply Range | +VA: 2.7–5.5 V; +VBD: 1.65–5.5 V - allows mixed-supply system integration with 1.8V/3.3V logic domains |
| Power Dissipation | 13.7 mW at 1 MSPS, +VA = 3V, +VBD = 1.8V - suitable for thermally constrained portable instrumentation |
Pinout & Package
ADS7230IRSAR is packaged in a 4 × 4 mm QFN-16 (RSA) with exposed thermal pad internally connected to substrate. Pin 1 is REF+ (REFIN); pin 16 is REF–; pins 13 and 12 are +IN0 and +IN1 respectively; pin 14 is COM (common inverting input); pin 4 is EOC/INT/CDI (bidirectional status/control); pin 5 is FS/CS; pin 9 is SCLK; pins 6 and 7 are SDI and SDO; pin 3 is CONVST; pins 11 and 10 are +VA and +VBD; pins 15 and 8 are AGND and BDGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF+ (REFIN) | Reference voltage input positive | Accepts external reference (0.3–5.5 V) to set full-scale range; high-impedance input (40 kΩ) |
| +IN0 / +IN1 | Dual analog input channels | Unipolar inputs (0V to VREF); selected automatically or manually via control register |
| COM | Common inverting input | Typically tied to AGND; defines differential baseline for both channels |
| CONVST | Conversion start trigger | Edge-sensitive input that freezes sample-and-hold and initiates conversion on next internal clock edge |
| EOC/INT/CDI | Status/output & chain data input | Configurable as end-of-conversion flag, interrupt, or daisy-chain data input in multi-device configurations |
| FS/CS | Frame sync / chip select | Enables SPI slave operation; synchronizes serial transfers and controls device activation |
| SCLK | Serial clock input | Supports up to 50 MHz externally; used for both I/O and internal conversion timing when configured |
| SDI / SDO | Serial data in/out | Full-duplex SPI interface; SDI accepts configuration commands and reset signals |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel MUX with auto/manual select | Reduces external multiplexer count and PCB area in multi-sensor systems; eliminates inter-channel switching delay uncertainty |
| Programmable TAG bit output | Appends channel ID (0/1) to each 16-bit conversion result, enabling unambiguous source attribution in daisy-chain mode |
| Built-in conversion clock (CCLK) | Removes need for external oscillator; simplifies layout and improves jitter performance versus external clock distribution |
| Three-tier power-down modes | Deep power-down (1 µA), nap (0.5 µA), and auto-nap (self-activated between conversions) extend battery life in intermittent-sampling applications |
| SPI/DSP serial interface | Compatible with TMS320 DSP frame sync and standard SPI controllers; supports 16-bit straight-binary output with MSB-first format |
Applications
| Industrial Process Monitoring | Medical Sensor Hub |
|---|---|
Use Scenario: Continuous monitoring of temperature, pressure, and flow sensors across distributed PLC I/O modules. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing two analog sensor outputs per conversion cycle with deterministic 18-CCLK latency. Use Value: Eliminates external MUX and timing controller; maintains ±0.5 LSB linearity over –40°C to +85°C for calibration stability. | Use Scenario: Compact wearable vital sign monitor acquiring ECG lead signals and skin temperature simultaneously. IC Role / Device Role / Timing Role: Low-power 12-bit ADC sampling biopotential and thermistor channels with auto-channel sequencing and deep power-down between readings. Use Value: 13.7 mW active power at 3V supply extends battery runtime; 73.9 dB SNR preserves diagnostic signal fidelity. |
| Magnetometer Data Acquisition | Automated Test Equipment (ATE) |
Use Scenario: High-precision magnetic field mapping using triaxial fluxgate sensors requiring synchronized dual-axis sampling. IC Role / Device Role / Timing Role: Dual-input SAR ADC capturing X/Y magnetometer outputs with 10 ps aperture jitter and 101 dB channel isolation at 50 kHz. Use Value: Minimizes crosstalk-induced vector error; supports daisy-chain configuration for multi-sensor array scalability. | Use Scenario: Modular ATE slot card digitizing multiple DUT analog outputs under tight timing constraints. IC Role / Device Role / Timing Role: 1-MSPS ADC with global CONVST and programmable EOC/INT enabling precise inter-card synchronization in parallel test setups. Use Value: TAG bit identifies channel origin in chained readouts; 93.4 dB SFDR ensures clean spectral analysis of test signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7229IRSAR | Single-channel input; identical core, timing, and power specs; lacks +IN1, COM, and auto-channel logic | Not suitable for dual-sensor simultaneous sampling; requires external MUX for multi-channel use | Select when only one analog input is needed and board space is constrained |
| ADS8328IPWR | 16-bit resolution, 500 kSPS, dual-channel; higher precision but lower speed and higher power (22 mW @ 3V) | Used where sub-LSB accuracy is critical (e.g., precision metrology), not high-speed transient capture | Select when resolution >12-bit is mandatory and throughput ≤500 kSPS suffices |
Compared with ADS7229IRSAR and ADS8328IPWR, ADS7230IRSAR uniquely balances dual-channel 1-MSPS throughput, 12-bit linearity, and ultra-low active power-making it optimal for cost-sensitive, space-constrained industrial and portable instrumentation where two coordinated analog inputs must be sampled without external support circuitry.
Availability
ADS7230IRSAR is available at Aetrix Electronics and suitable for industrial process control, medical sensor hubs, and automated test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant QFN packaging.
Supply support for ADS7230IRSAR 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 ADS7230IRSAR belongs to TI's low-power, high-speed SAR ADC family designed specifically for industrial, medical, and test equipment applications demanding dual-channel sampling, minimal external components, and robust operation across –40°C to +85°C.
FAQ
What is the maximum sampling rate of the ADS7230IRSAR under 3V analog supply conditions?
The ADS7230IRSAR achieves a maximum sampling rate of 1 MSPS when the analog supply (+VA) is 3.0V or higher. At 2.7V ≤ +VA < 3.0V, the maximum rate drops to 900 kSPS due to internal clock limitations. This behavior is explicitly specified in the Electrical Characteristics tables for both 5V and 1.8V timing sections of the SBAS437A datasheet. The ADS7230IRSAR maintains full 12-bit performance across this range.
Does the ADS7230IRSAR require an external reference voltage, or can it operate with an internal reference?
The ADS7230IRSAR requires an external reference voltage applied between REF+ (pin 1) and REF– (pin 16); it does not include an internal reference. The reference input accepts 0.3V to +VA, with recommended values of 2.5V (for 3V supply) or 5V (for 5V supply). Reference input impedance is 40 kΩ, and the device specifies tight gain error (±0.008% FSR typ) to ensure accuracy when paired with stable external references like the REF5025 or REF6025.
How does the programmable TAG bit function in the ADS7230IRSAR, and how is it enabled?
The TAG bit in the ADS7230IRSAR is a user-configurable output appended to each 16-bit conversion result: '0' for +IN0 and '1' for +IN1. It is enabled by setting the TAG bit (bit 7) in the configuration register via SDI during initialization. When active, the SDO output shifts 17 bits per frame (TAG + 16-bit code), allowing unambiguous channel identification in daisy-chain mode without host-side tracking. This feature is unique to the ADS7230IRSAR and not present in the single-channel ADS7229IRSAR.
What are the power-down current specifications for the ADS7230IRSAR, and how are the modes selected?
The ADS7230IRSAR offers three power-down modes: deep power-down (1 µA max), nap (0.5 µA max), and auto-nap (self-activated between conversions, ~0.5 µA avg). Modes are selected via the PD0/PD1 bits (bits 5–4) in the configuration register. Deep power-down disables all circuitry except wake-up logic; nap retains register state and reference buffer; auto-nap automatically enters nap after conversion completion and exits on CONVST or CS activity. All modes retain configuration across wake-up.
Can the ADS7230IRSAR be used in daisy-chain configuration, and what pins are involved?
Yes, the ADS7230IRSAR supports daisy-chain operation using the EOC/INT/CDI pin (pin 4) as chain data input and SDO (pin 7) as chain data output. In this mode, multiple devices share one SCLK and FS/CS line; the EOC/INT/CDI of each downstream device connects to the SDO of the upstream device. The TAG bit remains functional per device, and the host reads back concatenated results. Daisy-chain mode requires proper timing alignment and is validated in Figures 5 and 19 of the SBAS437A datasheet.
ADS7230IRSAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 2
- Input Type:
- Pseudo-Differential, 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:
- External
- Voltage - Supply, Analog:
- 4.5V ~ 5.5V
- Voltage - Supply, Digital:
- 1.65V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-QFN (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7230IRSAR FAQ
1.How can I place an order for ADS7230IRSAR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7230IRSAR 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 ADS7230IRSAR reliable?
The price and inventory of ADS7230IRSAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7230IRSAR is usually 5 days.
3.What payment methods are accepted for ADS7230IRSAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7230IRSAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7230IRSAR?
ADS7230IRSAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7230IRSAR 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 ADS7230IRSAR?
For technical support, including ADS7230IRSAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7230IRSAR requirements.
6.How does Aetrix verify that ADS7230IRSAR is sourced from the original manufacturer or authorized distributors?
All ADS7230IRSAR 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 ADS7230IRSAR meets industry standards.
7.What is the process for return or replacement of ADS7230IRSAR?
All ADS7230IRSAR units undergo pre-shipment inspection (PSI). If there is an issue with ADS7230IRSAR, 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 ADS7230IRSAR part is unused and in its original packaging.
Return procedure for ADS7230IRSAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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