ADS8342IPFBTG4 - 16-Bit 250kSPS 4-Ch SAR ADC | Texas Instruments
MPN: ADS8342IPFBTG4 ✓ Hoạt độngADS8342IPFBTG4 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho ADS8342IPFBTG4 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ADS8342IPFBTG4 (cùng hình factor và footprint) — khác nhau ở Input Type, No Missing Codes, Package, Output Interface, Power Dissipation.
ADS8342IPFBR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS8342IBPFBR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS8342IPFB
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ADS8342PFBT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ADS8342IPFBG4
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ADS8365IPAGR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS8342IPFBTG4 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 16 bits |
| Number of Channels | 4 |
| Tỷ lệ lấy mẫu | 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 |
| Khoảng nhiệt độ hoạt động | -40C to +85C (industrial grade) |
| Hộp | 48-pin TQFP (PFB), 7x7 mm |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | Data_NEEDED: MSL level] |
| Trạng thái RoHS | Compliant |
Cấu hình chân ADS8342IPFBTG4
| Chân 1 | CH0 — Analog input channel 0 (bipolar) |
| Chân 2 | CH1 — Analog input channel 1 (bipolar) |
| Chân 3 | CH2 — Analog input channel 2 (bipolar) |
| Chân 4 | CH3 — Analog input channel 3 (bipolar) |
| Chân 5 | AGND — Analog ground |
| Chân 6 | REFIN — External reference input |
| Chân 7 | REFOUT — Internal reference output (2.5 V typical) |
| Chân 8 | AGND — Analog ground |
| Chân 9 | AVDD — Analog supply (+5 V or +2.5 V) |
| Chân 10 | AVSS — Analog negative supply (-5 V typical) |
| Chân 11 | CS — Chip select (active low) |
| Chân 12 | RD — Read input (active low) |
| Chân 13 | WR — Write input (active low) |
| Chân 14 | CLK — External clock input |
| Chân 15 | BUSY — ADC busy output (active high) |
| Chân 16 | D15 — Data output bit 15 (MSB) |
| Chân 17 | D14 — Data output bit 14 |
| Chân 18 | D13 — Data output bit 13 |
| Chân 19 | D12 — Data output bit 12 |
| Chân 20 | D11 — Data output bit 11 |
| Chân 21 | D10 — Data output bit 10 |
| Chân 22 | D9 — Data output bit 9 |
| Chân 23 | D8 — Data output bit 8 |
| Chân 24 | DGND — Digital ground |
| Chân 25 | D7 — Data output bit 7 |
| Chân 26 | D6 — Data output bit 6 |
| Chân 27 | D5 — Data output bit 5 |
| Chân 28 | D4 — Data output bit 4 |
| Chân 29 | D3 — Data output bit 3 |
| Chân 30 | D2 — Data output bit 2 |
| Chân 31 | D1 — Data output bit 1 |
| Chân 32 | D0 — Data output bit 0 (LSB) |
| Chân 33 | DVDD — Digital supply (+5 V) |
| Chân 34 | NC — Not connected (per datasheet) |
| Chân 35 | NC — Not connected (per datasheet) |
| Chân 36 | NC — Not connected (per datasheet) |
| Chân 37 | MODE — Mode select input |
| Chân 38 | RANGE — Input range select |
| Chân 39 | NC — Not connected (per datasheet) |
| Chân 40 | AGND — Analog ground |
| Chân 41 | AGND — Analog ground |
| Chân 42 | AGND — Analog ground |
| Chân 43 | AGND — Analog ground |
| Chân 44 | AGND — Analog ground |
| Chân 45 | NC — Not connected (per datasheet) |
| Chân 46 | NC — Not connected (per datasheet) |
| Chân 47 | NC — Not connected (per datasheet) |
| Chân 48 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
ADS8342IPFBTG4 phù hợp cho 7 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADS8342IPFBTG4 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- True bipolar per-channel software-selectable input ranges (vsADS8365IPAGR)
- Parallel 16-bit output interface for direct microcontroller connection (vsADS8365IPAGR)
- 4-channel family consistency with multiple drop-in variants (vsADS8342IPFBR / ADS8342IBPFBR)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.