ADS8342IPFBTG4 - 16-Bit 250kSPS 4-Ch SAR ADC | Texas Instruments
MPN: ADS8342IPFBTG4 ✓ فعالADS8342IPFBTG4 نمای کلی
A SAR ADC is a successive-approximation analog-to-digital converter that uses a comparator, successive-approximation register, and an internal DAC to convert analog signals one bit at a time over N conversion cycles. SAR ADCs offer deterministic latency, no pipeline delay, excellent DC accuracy, and are widely used in industrial automation, instrumentation, data acquisition, and process control where multi-channel sampling and bipolar signal handling are required.
Key features include 4 true bipolar input channels with software-selectable input ranges (±10 V, ±5 V, 0 V to 10 V, 0 V to 5 V per channel), 16-bit no-missing-codes guaranteed performance, low 1 mV max offset error, 250 kSPS throughput, and a low-power 200 mW typical dissipation. The parallel interface provides direct connection to microprocessors, microcontrollers, and DSPs without glue logic.
Internally, the ADS8342 uses a charge-redistribution capacitor DAC for accurate successive approximation, with integrated input signal conditioning and reference buffering. The architecture delivers low aperture jitter and deterministic conversion timing, making the device suitable for multiplexed multi-channel data acquisition where per-channel DC accuracy must be preserved across rapid channel switching.
Typical applications include industrial process control and PLC analog input modules, multi-channel data acquisition systems, medical instrumentation front-ends, test and measurement equipment, and high-accuracy multi-axis sensor monitoring. The true bipolar input capability eliminates the need for external signal conditioning on ±10 V or ±5 V transducer outputs.
When designing with the ADS8342, ensure that the analog (AVDD) and digital (DVDD) supplies are well decoupled, and that the external reference is low-impedance and well bypassed at the REF pin. For multi-channel systems, the input multiplexer settling time should be considered when channel switching at full throughput to preserve channel-to-channel accuracy.
This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes that complement the manufacturer datasheet.
جایگزین‌های drop-in برای ADS8342IPFBTG4 — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای ADS8342IPFBTG4 (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Input Type, No Missing Codes, Package, Output Interface, Power Dissipation.
ADS8342IPFBR
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ADS8342IBPFBR
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ADS8342IPFB
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
ADS8342PFBT
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
ADS8342IPFBG4
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
ADS8365IPAGR
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
ADS8342IPFBTG4 حداکثر مقادیر مجاز و مشخصات الکتریکی
| رزولوشن | 16 bits |
| Number of Channels | 4 |
| نرخ نمونه‌برداری | 250 kSPS |
| ADC Architecture | SAR (Successive Approximation) |
| Input Type | True Bipolar (single-ended, software-selectable ranges per channel) |
| Input Range | ±10 V, ±5 V, 0-10 V, 0-5 V (software-selectable) |
| No Missing Codes | 16-bit ensured |
| Offset Error | 1 mV max |
| Analog Supply Voltage | ±5 V (typical), single +5 V also supported |
| Digital Supply Voltage | +5 V |
| Power Dissipation | 200 mW typical |
| Output Interface | 16-bit parallel, 3-state |
| محدوده دمای کاری | -40C to +85C (industrial grade) |
| بسته‌بندی | 48-pin TQFP (PFB), 7x7 mm |
| نوع نصب | Surface Mount |
| سطح MSL | Data_NEEDED: MSL level] |
| وضعیت RoHS | Compliant |
پیکربندی پین ADS8342IPFBTG4
| پین 1 | CH0 — Analog input channel 0 (bipolar) |
| پین 2 | CH1 — Analog input channel 1 (bipolar) |
| پین 3 | CH2 — Analog input channel 2 (bipolar) |
| پین 4 | CH3 — Analog input channel 3 (bipolar) |
| پین 5 | AGND — Analog ground |
| پین 6 | REFIN — External reference input |
| پین 7 | REFOUT — Internal reference output (2.5 V typical) |
| پین 8 | AGND — Analog ground |
| پین 9 | AVDD — Analog supply (+5 V or +2.5 V) |
| پین 10 | AVSS — Analog negative supply (-5 V typical) |
| پین 11 | CS — Chip select (active low) |
| پین 12 | RD — Read input (active low) |
| پین 13 | WR — Write input (active low) |
| پین 14 | CLK — External clock input |
| پین 15 | BUSY — ADC busy output (active high) |
| پین 16 | D15 — Data output bit 15 (MSB) |
| پین 17 | D14 — Data output bit 14 |
| پین 18 | D13 — Data output bit 13 |
| پین 19 | D12 — Data output bit 12 |
| پین 20 | D11 — Data output bit 11 |
| پین 21 | D10 — Data output bit 10 |
| پین 22 | D9 — Data output bit 9 |
| پین 23 | D8 — Data output bit 8 |
| پین 24 | DGND — Digital ground |
| پین 25 | D7 — Data output bit 7 |
| پین 26 | D6 — Data output bit 6 |
| پین 27 | D5 — Data output bit 5 |
| پین 28 | D4 — Data output bit 4 |
| پین 29 | D3 — Data output bit 3 |
| پین 30 | D2 — Data output bit 2 |
| پین 31 | D1 — Data output bit 1 |
| پین 32 | D0 — Data output bit 0 (LSB) |
| پین 33 | DVDD — Digital supply (+5 V) |
| پین 34 | NC — Not connected (per datasheet) |
| پین 35 | NC — Not connected (per datasheet) |
| پین 36 | NC — Not connected (per datasheet) |
| پین 37 | MODE — Mode select input |
| پین 38 | RANGE — Input range select |
| پین 39 | NC — Not connected (per datasheet) |
| پین 40 | AGND — Analog ground |
| پین 41 | AGND — Analog ground |
| پین 42 | AGND — Analog ground |
| پین 43 | AGND — Analog ground |
| پین 44 | AGND — Analog ground |
| پین 45 | NC — Not connected (per datasheet) |
| پین 46 | NC — Not connected (per datasheet) |
| پین 47 | NC — Not connected (per datasheet) |
| پین 48 | NC — Not connected (per datasheet) |
کاربردهای معمول
ADS8342IPFBTG4 مناسب است برای 7 کاربردs: Industrial Process Control / PLC Analog Input Modules, Multi-Channel Data Acquisition Systems (DAQ), Medical Instrumentation Front-End, Test and Measurement Equipment, Multi-Axis Sensor Monitoring (Strain Gauge / Load Cell), Audio and Vibration Analysis Front-End, Automotive Test and Diagnostic Equipment.
Industrial Process Control / PLC Analog Input Modules
The ADS8342IPFBTG4 is purpose-built for industrial PLC analog input modules that read ±10 V or ±5 V signals from pressure transducers, flow meters, and process instrumentation. The 4 true bipolar input channels with software-selectable per-channel ranges allow direct connection to bipolar sensor outputs without external signal conditioning or level shifting. At 250 kSPS throughput the device digitizes multiple channels per scan cycle with 16-bit no-missing-codes accuracy, while the parallel interface connects directly to microcontrollers used in industrial controllers. The -40C to +85C industrial temperature rating ensures reliable operation inside factory control cabinets.
پیشنهادی
Multi-Channel Data Acquisition Systems (DAQ)
High-speed multi-channel DAQ systems use the ADS8342IPFBTG4 to digitize up to 4 bipolar channels simultaneously at 250 kSPS, with the SAR architecture providing deterministic conversion latency critical for synchronized sampling. The capacitor-based charge-redistribution DAC delivers low aperture jitter, while the 16-bit parallel 3-state output bus enables fast read cycles to the host DSP or FPGA. With 1 mV max offset and 16-bit no-missing-codes performance, the device meets laboratory-grade measurement requirements in compact benchtop and modular DAQ form factors.
پیشنهادی
Medical Instrumentation Front-End
Medical instrumentation such as patient monitors, ECG front-ends, and blood chemistry analyzers benefit from the ADS8342IPFBTG4's 4 true bipolar input channels and 250 kSPS throughput for digitizing low-frequency biopotential and transducer signals. The 16-bit resolution captures the wide dynamic range of medical signals, while the SAR architecture eliminates pipeline delay for accurate sampling of simultaneous events. Low 200 mW power dissipation supports portable and battery-powered medical device designs.
پیشنهادی
Test and Measurement Equipment
Benchtop and modular test equipment uses the ADS8342IPFBTG4 to digitize ±10 V or ±5 V signals from DUTs with 16-bit accuracy. The parallel interface simplifies integration with FPGA-based test controllers, and the 4 channels enable simultaneous measurement of multiple test points (voltage, current, temperature-compensated reference). The wide input range software configurability allows one hardware platform to handle multiple measurement standards without external attenuation or amplification.
پیشنهادی
Multi-Axis Sensor Monitoring (Strain Gauge / Load Cell)
Multi-axis strain gauge and load cell monitoring systems use the ADS8342IPFBTG4 to read 4 differential bipolar channels simultaneously with 16-bit accuracy. The device handles the typical ±5 V or ±10 V wheatstone bridge outputs directly, eliminating external instrumentation amplifiers for many transducer ranges. The 250 kSPS throughput enables synchronous sampling across multiple load cells for force/torque measurement platforms.
پیشنهادی
Audio and Vibration Analysis Front-End
Audio analyzers use the ADS8342IPFBTG4 to digitize up to 4 channels of bipolar audio-band signals with 16-bit accuracy. The SAR architecture provides deterministic conversion timing critical for phase-coherent multi-channel vibration measurements. With the software-selectable ±10 V or ±5 V input ranges, the device interfaces directly to ICP/IEPE sensor signal conditioners and audio preamp outputs in structural-health and acoustic-test systems.
پیشنهادی
Automotive Test and Diagnostic Equipment
Off-board automotive diagnostic and end-of-line test equipment uses the ADS8342IPFBTG4 to digitize bipolar automotive sensor outputs (throttle position, pedal position, suspension sensors) with 16-bit accuracy. The 4-channel input multiplexer supports simultaneous multi-sensor sampling, while the parallel interface simplifies integration with production-line test controllers. Although not AEC-Q100 qualified itself, the device is widely used in non-safety-critical automotive test fixtures.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای ADS8342IPFBTG4 — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | ADS8342IPFBR | ADS8342IBPFBR | ADS8342PFBT | ADS8342IPFBG4 | ADS8365IPAGR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | TQFP-48 (PFB) | TQFP-48 (PFB) - same | TQFP-48 (PFB) - same | TQFP-48 (PFB) - same | TQFP-48 (PFB) - same | TQFP-48 (PFB) - same |
| Resolution | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit |
| Sampling Rate | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 6 |
| Input Type | True Bipolar | True Bipolar | True Bipolar | True Bipolar | True Bipolar | True Bipolar |
| Output Interface | 16-bit Parallel | 16-bit Parallel | 16-bit Parallel | 16-bit Parallel | 16-bit Parallel | Serial |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
تفاوت‌های کلیدی
- True bipolar per-channel software-selectable input ranges (در مقابلADS8365IPAGR)
- Parallel 16-bit output interface for direct microcontroller connection (در مقابلADS8365IPAGR)
- 4-channel family consistency with multiple drop-in variants (در مقابلADS8342IPFBR / ADS8342IBPFBR)
یادداشت‌های طراحی
Estimated: at AVDD=+5V, AVSS=-5V, and DVDD=+5V the ADS8342IPFBTG4 typically draws approximately 20 mA from each rail (40 mA total), corresponding to the 200 mW typical dissipation stated in the manufacturer datasheet. Place a 10 uF tantalum plus 0.1 uF ceramic decoupling capacitor on each supply pin (AVDD, AVSS, DVDD), located within 5 mm of the IC. A ferrite bead between analog and digital supplies is recommended to minimize digital switching noise coupling into the analog front-end.
Use a continuous ground plane under and around the ADS8342IPFBTG4 with the analog ground (AGND) and digital ground (DGND) tied together at a single point near the IC. Route analog input traces (CH0-CH3) and reference traces (REFIN, REFOUT) with short, guarded routing and avoid crossing digital bus traces. The 48-pin TQFP (PFB) package has an exposed thermal pad that must be soldered to the PCB ground plane for thermal and electrical performance. Add 4-6 ground vias in the thermal pad for low-impedance thermal dissipation.
The REFOUT pin (2.5 V internal reference) must be bypassed with a 10 uF tantalum or low-ESR ceramic capacitor placed within 5 mm of the pin. If using an external reference at REFIN, ensure the reference source has low output impedance (<0.1 ohm at DC, <1 ohm at 1 MHz) and is decoupled with 0.1 uF + 10 uF capacitors. When switching input channels at high throughput, allow sufficient multiplexer settling time before initiating the next conversion to preserve channel-to-channel accuracy.
Do not leave unused analog inputs floating - tie them to AGND or a known mid-supply voltage to prevent crosstalk and DC bias errors. The BUSY signal must be monitored to avoid reading stale conversion data; do not poll faster than the BUSY falling edge. Ensure the MODE and RANGE configuration pins are tied to logic levels (do not float) before initiating conversions. The parallel 3-state outputs become high-impedance only when CS is held high; confirm bus contention is avoided in multi-device shared-bus designs.
اطلاعات انطباق
RoHS compliant per TI product page. G4 suffix indicates green/lead-free packaging. Not AEC-Q100 qualified; not intended for on-board automotive safety applications.