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Texas Instruments ADS7852Y/250G4
- Part No.:
- ADS7852Y/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-TQFP
- Datasheet:
-
ADS7852Y/250G4.pdf
- Description:
- IC ADC 12BIT SAR 32TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,786
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Product details
Overview
ADS7852Y/250G4 from Texas Instruments is a 12-bit, 8-channel SAR analog-to-digital converter with integrated 2.5V reference, 500kHz throughput, ±1LSB DNL, and TQFP-32 package. It operates from a single 5V supply, delivers 70dB SINAD, and supports nap/sleep modes for low-power data acquisition in medical instrumentation and test equipment.
For engineers reviewing the ADS7852Y/250G4 datasheet, ADS7852Y/250G4 pinout, ADS7852Y/250G4 application, or ADS7852Y/250G4 equivalent, key selection criteria include channel count, parallel interface timing, internal reference accuracy (±2 LSB INL), power modes (13mW normal / 2mW sleep), and TQFP-32 thermal performance across –40°C to +85°C.
Technical Context
The ADS7852Y/250G4 uses capacitive redistribution SAR architecture with an on-chip 2.5V bandgap reference and integrated sample-and-hold. Its 8-channel single-ended multiplexer is controlled via A0–A2 address pins, and conversion is clocked externally at 16× sampling rate (e.g., 8MHz CLK for 500kHz throughput).
Digital interface employs CMOS-compatible 12-bit parallel output (DB0–DB11) with active-low CS, WR, and RD controls, plus BUSY status signaling. Power management includes Nap mode (600µA, reference active) and Sleep mode (10µA, full shutdown), both entered via RD/A0/A1 state transitions after conversion completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1.22mV LSB step size with 2.5V reference, enabling precise voltage digitization over 0–5V range. |
| Sampling Rate | 500kHz - supports high-speed transient capture in lab instruments and real-time process monitoring. |
| INL / DNL | ±2 LSB / ±1 LSB - ensures monotonicity and <0.05% full-scale linearity error for calibration-sensitive applications. |
| Power Consumption | 13mW normal / 2mW sleep - enables battery-backed portable measurement systems without sacrificing speed. |
| Reference | Internal 2.5V ±0.02V (±0.8%) - eliminates external reference component count while supporting overdrive up to 2.55V. |
| SINAD | 70dB at 50kHz - provides >11.6 effective bits for clean signal reconstruction in medium-bandwidth acquisition. |
| Operating Temp | –40°C to +85°C - fully specified for industrial and medical environments without derating. |
Pinout & Package
TQFP-32 (PBS) package with 0.8mm lead pitch, exposed thermal pad (not electrically connected), and moisture sensitivity level MSL-3 (260°C peak reflow, 168-hour floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN7 | Analog input channels | Single-ended inputs; selected via A0–A2; each exhibits >1GΩ impedance in hold mode and 15pF capacitance during sampling. |
| A0, A1, A2 | Channel address inputs | Binary-select one of eight analog channels; also control power-down entry (Nap/Sleep) when read with RD. |
| WR | Write strobe input | Falling edge initiates conversion and latches channel address; requires ≥35ns pulse width and valid CS. |
| BUSY | Conversion status output | Active-low open-drain signal; goes low ~20ns after WR fall and rises after 13.5 clock cycles to indicate data validity. |
| RD, CS | Data read controls | Both low enable 12-bit parallel bus (DB0–DB11); RD rising edge with A0/A1 configures power mode post-read. |
| VREF | Reference I/O | 2.5V internal reference output or external reference input (2.0–2.55V); must be bypassed with 0.1µF ceramic + 2.2µF tantalum. |
| DB0–DB11 | Parallel data outputs | Straight binary format (000H = 0V, FFFH = 5V); tri-state controlled by CS/RD; DB11 = MSB, DB0 = LSB. |
| AGND / DGND | Analog/digital ground | Separate pins require star grounding or split-plane layout to minimize digital noise coupling into analog path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2.5V reference | Eliminates external reference IC and trimming components; drift ≤30ppm/°C ensures stable full-scale over temperature. |
| 8-channel single-ended MUX | Reduces board space vs. discrete ADCs per channel; channel-to-channel isolation ≥95dB prevents crosstalk in multi-sensor systems. |
| Nap and Sleep power modes | Nap mode (600µA) retains reference stability for immediate wake-up; Sleep mode (10µA) cuts power but requires reference stabilization time. |
| 12-bit parallel CMOS interface | Enables direct connection to microcontroller GPIO or FPGA I/O without serial protocol overhead or timing-critical SPI setup. |
| No missing codes | Guarantees monotonic transfer function across full 0–4095 code range-critical for closed-loop control and safety-critical feedback. |
Applications
| Medical Instrumentation | Industrial Process Control |
|---|---|
|
Use Scenario: Simultaneous acquisition of ECG, respiration, and temperature sensor signals in portable patient monitors. IC Role / Device Role / Timing Role: 8-channel front-end ADC digitizing analog biosignals at 500kHz aggregate rate with synchronized sampling. Use Value: Integrated reference and low 13mW power allow compact, battery-operated designs meeting IEC 60601 leakage current limits. |
Use Scenario: Real-time monitoring of pressure, flow, and valve position in PLC-based factory automation systems. IC Role / Device Role / Timing Role: High-accuracy analog input module converting 4–20mA loop signals and sensor outputs with ±2 LSB INL. Use Value: TQFP-32 package and industrial temp range support DIN-rail mounted I/O modules operating continuously at 60°C ambient. |
| Test & Measurement Equipment | Data Acquisition Systems |
|
Use Scenario: Channel-scanning oscilloscope front-end capturing transient waveforms across multiple probes. IC Role / Device Role / Timing Role: Parallel-output ADC feeding FPGA buffer memory with deterministic 1.75µs conversion time and BUSY-driven latch timing. Use Value: 70dB SINAD and 76dB SFDR enable 10+ ENOB for sub-100kHz signal analysis without external anti-alias filtering. |
Use Scenario: Modular DAQ card acquiring vibration, strain gauge, and thermocouple data in aerospace ground-test rigs. IC Role / Device Role / Timing Role: Multi-channel ADC with Nap mode reducing average power during idle periods between burst acquisitions. Use Value: Internal reference tolerance (±0.8%) and gain error match (±1 LSB) simplify system-level calibration across 8 channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, multi-channel, parallel-output ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7854Y/250 | 14-bit resolution, same 8-channel TQFP-32 package, 250ksps max sampling rate, higher 25mW power. | Better precision for calibration-grade instruments; lower speed limits dynamic signal capture. | Select ADS7854Y/250 when ENOB >11.5 is required and 250ksps suffices; ADS7852Y/250G4 preferred for 500kHz real-time acquisition. |
| MAX11621ETI+ | 12-bit, 8-channel, SPI interface (not parallel), 250ksps, internal reference, 10-lead TDFN package. | Smaller footprint and lower pin count, but serial interface adds MCU overhead and limits throughput determinism. | Choose MAX11621ETI+ for space-constrained embedded systems where SPI integration simplifies routing; ADS7852Y/250G4 suits high-speed parallel bus architectures. |
Compared with ADS7854Y/250 and MAX11621ETI+, the ADS7852Y/250G4 uniquely balances 500kHz parallel throughput, integrated reference, and industrial temperature operation in a standard TQFP-32-making it optimal for cost-sensitive, speed-critical DAQ subsystems requiring minimal firmware latency.
Availability
ADS7852Y/250G4 is available at Aetrix Electronics and suitable for medical instrumentation, industrial process control, and test & measurement applications requiring stable component supply and long-term lifecycle support.
Supply support for ADS7852Y/250G4 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 expertise in precision data converters and industrial-grade IC design.
The ADS7852Y/250G4 belongs to TI's precision SAR ADC product line, engineered for high-speed, low-power, multi-channel data acquisition in medical, test, and industrial systems where accuracy, reliability, and ease of integration are critical.
FAQ
What is the maximum sampling rate supported by the ADS7852Y/250G4?
The ADS7852Y/250G4 supports a maximum sampling rate of 500kHz, achieved with an 8MHz external clock (fCLK = 16 × fSAMPLE). At this rate, conversion time is 1.75µs and acquisition time is 0.25µs. Lower rates down to 12.5Hz are possible with reduced clock frequencies, maintaining full 12-bit performance across the entire range.
Does the ADS7852Y/250G4 require an external reference voltage?
No, the ADS7852Y/250G4 includes a precision 2.5V internal bandgap reference with ±0.02V initial accuracy and ≤30ppm/°C drift. External reference is optional and only needed when tighter reference stability or custom full-scale ranges (4.0–5.1V) are required; VREF pin accepts 2.0–2.55V inputs.
How does the Nap mode differ from Sleep mode in the ADS7852Y/250G4?
In Nap mode, the ADS7852Y/250G4 powers down all circuitry except the internal reference, drawing ~600µA and enabling immediate valid conversions upon wake-up. In Sleep mode, the entire device shuts down (~10µA), but reference stabilization delays valid output by hundreds of milliseconds-making Nap mode preferable for burst-acquisition systems.
What is the purpose of separate AGND and DGND pins on the ADS7852Y/250G4?
The ADS7852Y/250G4 uses separate AGND and DGND pins to isolate analog return paths from digital switching noise. Proper layout-such as connecting AGND to a quiet analog ground plane and DGND to digital ground near decoupling caps-reduces ground bounce and preserves 70dB SINAD performance, especially at 500kHz sampling.
Can the ADS7852Y/250G4 interface directly with a microcontroller GPIO port?
Yes, the ADS7852Y/250G4 features a 12-bit CMOS-compatible parallel interface (DB0–DB11) with active-low control signals (CS, WR, RD) and BUSY status. It interfaces directly with 5V-tolerant MCU GPIOs without level shifters, provided timing requirements (e.g., 30ns data hold, 25ns CS/RD pulse width) are met in firmware or hardware logic.
ADS7852Y/250G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Selectable Address
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-TQFP (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7852Y/250G4 FAQ
1.How can I place an order for ADS7852Y/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7852Y/250G4 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 ADS7852Y/250G4 reliable?
The price and inventory of ADS7852Y/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7852Y/250G4 is usually 5 days.
3.What payment methods are accepted for ADS7852Y/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7852Y/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7852Y/250G4?
ADS7852Y/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7852Y/250G4 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 ADS7852Y/250G4?
For technical support, including ADS7852Y/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7852Y/250G4 requirements.
6.How does Aetrix verify that ADS7852Y/250G4 is sourced from the original manufacturer or authorized distributors?
All ADS7852Y/250G4 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 ADS7852Y/250G4 meets industry standards.
7.What is the process for return or replacement of ADS7852Y/250G4?
All ADS7852Y/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7852Y/250G4, 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 ADS7852Y/250G4 part is unused and in its original packaging.
Return procedure for ADS7852Y/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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