My Inquiry
My Account
Texas Instruments ADS7229IRSATG4
- Part No.:
- ADS7229IRSATG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ADS7229IRSATG4.pdf
- Description:
- IC ADC 12BIT SAR 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,032
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS7229IRSATG4 from Texas Instruments is a low-power, 12-bit, 1-MSPS unipolar-input successive approximation register (SAR) analog-to-digital converter with integrated sample-and-hold, SPI/DSP-compatible serial interface, and built-in conversion clock. It operates from 2.7V to 5.5V analog supply, delivers ±0.5 LSB max INL/DNL, and supports industrial temperature range (–40°C to +85°C). It is used in precision transducer interface and medical instrument signal acquisition.
For engineers reviewing the ADS7229IRSATG4 datasheet, ADS7229IRSATG4 pinout, ADS7229IRSATG4 application, or ADS7229IRSATG4 equivalent, key selection criteria include unipolar input range (0 V to VREF), 18-cycle conversion time, deep power-down mode (1 µA), daisy-chain capability, and QFN-16 package compatibility with TSSOP-16 footprint.
Technical Context
The ADS7229IRSATG4 implements a capacitor-based SAR architecture with inherent sample-and-hold, supporting manual or auto-triggered conversions via CONVST and FS/CS control. Its internal 21–24.5 MHz conversion clock eliminates external timing components while enabling up to 50 MHz SCLK for high-speed serial readout.
It features programmable EOC/INT polarity, global CONVST independent of CS, and configurable status output (EOC, INT, or CDI). The device supports daisy-chain operation across multiple converters using SDO/SDI cascading and includes a TAG bit for channel identification in multi-device systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes for precise analog signal digitization |
| Sampling Rate | 1 MSPS at +VA ≥ 3V - enables real-time capture of fast-changing sensor signals |
| INL / DNL | ±0.5 LSB max - ensures monotonicity and minimal code-width variation across full scale |
| SNR @ 10 kHz | 73.9 dB (5V ref) - supports >12-bit effective resolution in low-noise applications |
| Power Dissipation | 13.7 mW at 3V analog supply - suitable for battery-powered portable instrumentation |
| Operating Temp | –40°C to +85°C - qualified for industrial and medical embedded environments |
| Reference Range | 0.3 V to +VA - allows flexible external reference selection including 2.5 V or 5 V sources |
Pinout & Package
The ADS7229IRSATG4 is housed in a 4 × 4 mm, 16-pin QFN package (RSA) with exposed thermal pad internally connected to substrate; pad may be tied to AGND or left floating but must remain isolated from digital ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, REF+ | External reference input | Accepts precision voltage reference (0.3 V to +VA); determines full-scale range and ADC accuracy |
| 3, CONVST | Conversion start trigger | Edge-sensitive input that freezes S/H and initiates conversion on next internal clock edge |
| 4, EOC/INT/CDI | Status/data I/O | Programmable as end-of-conversion flag, interrupt, or daisy-chain data input in multi-device systems |
| 5, FS/CS | Frame sync / chip select | Enables SPI/DSP serial interface; controls SDO output enable and frame synchronization |
| 7, SDO | Serial data output | Tri-state CMOS output delivering 12-bit straight-binary result MSB-first on SCLK falling edge |
| 9, SCLK | Serial clock input | Accepts up to 50 MHz clock; serves as I/O clock only or dual-purpose I/O + conversion clock |
| 11, +VA | Analog supply | 2.7 V to 5.5 V rail powering core ADC, S/H, and reference buffer; decoupling critical for SNR |
| 13, +IN | Differential analog input (+) | Noninverting input for unipolar differential measurement; accepts 0 V to VREF relative to –IN |
| 14, –IN | Differential analog input (–) | Inverting input, typically grounded; defines common-mode point and input range offset |
| 15, AGND | Analog ground | Reference return for analog circuitry; must be separated from BDGND to minimize noise coupling |
| 16, REF– | Reference return | Connects directly to AGND via dedicated via to minimize reference path impedance and error |
Key Features
| Feature | Design Value |
|---|---|
| Built-in conversion clock (CCLK) | 21–24.5 MHz internal oscillator eliminates need for external timing components and simplifies layout |
| Multi-chip daisy-chain mode | Enables synchronous sampling across multiple ADS7229IRSATG4 devices using single SCLK/FS/CS bus |
| Three power-down modes | Deep power-down (1 µA), Nap (0.5 µA), and Auto Nap reduce idle current without sacrificing wake-up latency |
| Global CONVST independent of CS | Allows simultaneous conversion initiation across multiple devices regardless of individual CS state |
| Programmable EOC/INT polarity | Configurable active-high/low status output supports diverse host controller interrupt logic requirements |
Applications
| Transducer Interface | Medical Instrumentation |
|---|---|
Use Scenario: Digitizing low-level output from strain-gauge load cells or RTD bridges in industrial weighing systems. IC Role / Device Role / Timing Role: Precision unipolar ADC capturing differential sensor outputs with 12-bit linearity and <1 µV/°C offset drift. Use Value: Enables sub-0.05% full-scale measurement accuracy over temperature without calibration. | Use Scenario: Acquiring ECG or EEG biopotential signals in portable patient monitors with battery life constraints. IC Role / Device Role / Timing Role: Low-power SAR ADC providing 1 MSPS sampling with 73.9 dB SNR and integrated S/H for anti-aliasing. Use Value: Delivers diagnostic-grade waveform fidelity while consuming only 13.7 mW at 3 V, extending runtime. |
| Industrial Process Control | Data Acquisition Systems |
Use Scenario: Monitoring pressure, flow, and temperature sensors in PLC analog input modules operating in harsh factory environments. IC Role / Device Role / Timing Role: Industrial-grade ADC with –40°C to +85°C operation, robust ESD protection, and daisy-chain support for modular I/O expansion. Use Value: Reduces system BOM by eliminating external clock and reference buffers while maintaining ±0.5 LSB linearity. | Use Scenario: High-channel-count DAQ systems requiring synchronized sampling across multiple sensor inputs. IC Role / Device Role / Timing Role: SPI-compatible ADC supporting global CONVST and daisy-chain mode for deterministic multi-channel capture. Use Value: Enables precise time-aligned sampling of 8+ channels using single master clock and control lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7229IRSAR | Same die, 3000-unit tape-and-reel packaging vs. 250-unit small reel (RSATG4) | No functional difference; suited for high-volume automated assembly | Select ADS7229IRSAR for production ramp; ADS7229IRSATG4 is ideal for prototyping and low-volume builds. |
| ADS8329IPWR | 16-bit resolution, 500 kSPS, higher SNR (86 dB), but higher power (12 mW @ 3 V) and no built-in CCLK | Better resolution for precision metrology; requires external clock and consumes more board space | Choose ADS8329IPWR when 16-bit accuracy outweighs power and integration trade-offs. |
Compared with ADS7229IRSAR, the ADS7229IRSATG4 offers identical electrical performance in smaller reel packaging for evaluation; versus ADS8329IPWR, it trades resolution for lower power, integrated clock, and faster throughput-making it optimal for cost- and size-constrained 12-bit applications.
Availability
ADS7229IRSATG4 is available at Aetrix Electronics and suitable for transducer interface, medical instrumentation, and industrial process control applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for ADS7229IRSATG4 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 precision data converter expertise.
The ADS7229IRSATG4 belongs to TI's low-power, high-speed SAR ADC family designed for industrial, medical, and test equipment where integration, accuracy, and energy efficiency are critical.
FAQ
What is the maximum sampling rate of the ADS7229IRSATG4 under 3V analog supply?
The ADS7229IRSATG4 achieves 1 MSPS sampling rate when +VA is between 3.0 V and 3.6 V. At 2.7 V ≤ +VA < 3.0 V, the maximum rate drops to 900 kSPS per the datasheet's specified conditions. This behavior is enforced by internal clock scaling and is fully characterized across the industrial temperature range for the ADS7229IRSATG4.
Does the ADS7229IRSATG4 require an external reference voltage?
Yes, the ADS7229IRSATG4 requires an external reference applied between REF+ and REF– pins. It supports reference voltages from 0.3 V to +VA, with typical use cases employing 2.5 V or 5 V references. The device does not include an internal reference, so accuracy and stability depend entirely on the external source connected to the ADS7229IRSATG4.
Can the ADS7229IRSATG4 operate in daisy-chain configuration with other ADCs?
Yes, the ADS7229IRSATG4 supports daisy-chain mode using its EOC/INT/CDI pin as chain data input and SDO as serial output. Multiple ADS7229IRSATG4 devices can share one SCLK and FS/CS bus, enabling synchronized conversions and compact multi-channel designs without additional glue logic.
What power-down modes are available on the ADS7229IRSATG4 and their typical current draw?
The ADS7229IRSATG4 offers three power-down modes: Deep Power-Down (1 µA), Nap (0.5 µA), and Auto Nap (0.5 µA). These modes are software-controllable via SPI commands and allow rapid wake-up (<1 µs) while reducing quiescent current significantly compared to active operation (5.7–7.0 mA at 1 MSPS).
Is the ADS7229IRSATG4 pin-compatible with the ADS7230 series?
No, the ADS7229IRSATG4 is not pin-compatible with the ADS7230. Although both share the same QFN-16 RSA package, the ADS7230 substitutes +IN0/+IN1/COM for +IN/–IN and adds a RESERVED pin, altering the pin mapping. The ADS7229IRSATG4 uses pins 12 (RESERVED) and 14 (–IN), whereas the ADS7230 assigns those to +IN1 and COM respectively.
ADS7229IRSATG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential, Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 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:
- -
ADS7229IRSATG4 FAQ
1.How can I place an order for ADS7229IRSATG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7229IRSATG4 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 ADS7229IRSATG4 reliable?
The price and inventory of ADS7229IRSATG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7229IRSATG4 is usually 5 days.
3.What payment methods are accepted for ADS7229IRSATG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7229IRSATG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7229IRSATG4?
ADS7229IRSATG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7229IRSATG4 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 ADS7229IRSATG4?
For technical support, including ADS7229IRSATG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7229IRSATG4 requirements.
6.How does Aetrix verify that ADS7229IRSATG4 is sourced from the original manufacturer or authorized distributors?
All ADS7229IRSATG4 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 ADS7229IRSATG4 meets industry standards.
7.What is the process for return or replacement of ADS7229IRSATG4?
All ADS7229IRSATG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7229IRSATG4, 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 ADS7229IRSATG4 part is unused and in its original packaging.
Return procedure for ADS7229IRSATG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS7229IRSATG4 Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
