ADS8383IBPFBR - 18-Bit 500kHz SAR ADC | Texas Instruments
料号： ADS8383IBPFBR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.62 | $166.20 |
| 100 | $14.75 | $1,475.00 |
| 500 | $12.95 | $6,475.00 |
| 1,000 | $11.2 | $11,200.00 |
ADS8383IBPFBR 概述
An SAR ADC is a successive-approximation-register analog-to-digital converter: a sampled analog input is compared against an internal binary-weighted capacitor DAC one bit per clock cycle, producing N-bit digital output in N conversion cycles with no latency between sample and result. Within the data-converter hierarchy, the ADS8383 belongs to the SAR ADC sub-family of precision ADCs (sibling to delta-sigma and pipeline ADCs) and is used in the data-acquisition signal chain alongside amplifiers, references, and digital isolators.
Key features include a 500 kHz sample rate, 18-bit NMC guarantee, very low power dissipation, an internal or external reference option, and a flexible 8/16/18-bit parallel host interface. The 48-TQFP (PFB) package is footprint-compatible with the broader TI ADS838x family, enabling a single PCB layout to support multiple resolution/speed options.
Typical applications include industrial process control, medical instrumentation, optical networking gain/digitization, and high-speed data-acquisition front ends. The wide input range and high DC accuracy also make it suitable for precision weigh scales, vibration analysis, and laboratory instrumentation.
When designing with this device, the reference voltage (REFP/REFM) bypass network and the analog input RC network must be carefully placed to preserve AC performance. For best linearity, drive the +IN and -IN pins with a low-impedance, bandwidth-limited amplifier such as the THS4631 or OPA227, and use a single-point ground at the ADC analog ground pin.
This page synthesizes distributor pricing, drop-in alternatives (ADS8383IBPFBT, ADS8383IBPFBRG4, ADS8383IBPFBTG4), and practical design notes that complement the manufacturer datasheet.
直接替换替代料： ADS8383IBPFBR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADS8383IBPFBR （相同外形与封装尺寸） ——差异在于 Architecture, Package, Sample Rate, Analog Supply Voltage, Input Type.
快速对比工具——选择替代料号进行并排对比：
ADS8383IBPFBT
✅ 直接替换📋 参考替代料（不在目录中）
ADS8383IBPFBRG4
✅ 直接替换✓ 有现货
$10.4 / 个
查看数据手册 →ADS8383IBPFBTG4
✅ 直接替换📋 参考替代料（不在目录中）
ADS8382IRHPR
✅ 直接替换✓ 有现货
$9.65 / 个
查看数据手册 →ADS8381IBPFBR
✅ 直接替换✓ 有现货
$9.85 / 个
查看数据手册 →ADS8383IBPFBR 最大额定值与电气特性
| 分辨率 | 18 bit |
| Sample Rate | 500 kHz (max) |
| Architecture | SAR (Successive Approximation Register) |
| Number of Input Channels | 1 |
| Input Type | Unipolar, pseudo-differential (+IN / -IN) |
| 接口 | Parallel (8/16/18-bit bus) |
| Latency | Zero (SAR, no pipeline delay) |
| No-Missing-Code (NMC) | 18-bit NMC ensured over temperature |
| Analog Input Range | 0 V to VREF (unipolar) |
| Reference Type | Internal or External (REFP / REFM pins) |
| Power Dissipation | Micropower (typ < 100 mW at 500 kHz) |
| 工作温度范围 | -40 C to +85 C (industrial, I-suffix) |
| 封装 | 48-pin TQFP (PFB), 7x7 mm |
| 安装类型 | Surface Mount |
| MSL 等级 | 2 |
| Lead Free / RoHS | Yes / RoHS compliant |
ADS8383IBPFBR 引脚配置
| 引脚 1 | DGND — Digital ground |
| 引脚 2 | DB0 — Parallel data bus bit 0 (LSB) |
| 引脚 3 | DB1 — Parallel data bus bit 1 |
| 引脚 4 | DB2 — Parallel data bus bit 2 |
| 引脚 5 | DB3 — Parallel data bus bit 3 |
| 引脚 6 | DB4 — Parallel data bus bit 4 |
| 引脚 7 | DB5 — Parallel data bus bit 5 |
| 引脚 8 | DB6 — Parallel data bus bit 6 |
| 引脚 9 | DB7 — Parallel data bus bit 7 |
| 引脚 10 | DB8 — Parallel data bus bit 8 |
| 引脚 11 | DB9 — Parallel data bus bit 9 |
| 引脚 12 | DB10 — Parallel data bus bit 10 |
| 引脚 13 | DB11 — Parallel data bus bit 11 |
| 引脚 14 | DB12 — Parallel data bus bit 12 |
| 引脚 15 | DB13 — Parallel data bus bit 13 |
| 引脚 16 | DB14 — Parallel data bus bit 14 |
| 引脚 17 | DB15 — Parallel data bus bit 15 |
| 引脚 18 | DB16 — Parallel data bus bit 16 |
| 引脚 19 | DB17 — Parallel data bus bit 17 (MSB) |
| 引脚 20 | DVDD — Digital supply voltage |
| 引脚 21 | DGND — Digital ground |
| 引脚 22 | BYTE/BUS18 — Bus width select |
| 引脚 23 | /RD — Read strobe (active low) |
| 引脚 24 | /CS — Chip select (active low) |
| 引脚 25 | /BUSY — Conversion in progress (active low) |
| 引脚 26 | /CONVST — Conversion start (active low) |
| 引脚 27 | NC — Not connected |
| 引脚 28 | NC — Not connected |
| 引脚 29 | REFM — Reference ground (negative reference) |
| 引脚 30 | REFP — Reference positive input |
| 引脚 31 | REFM — Reference ground (negative reference) |
| 引脚 32 | AGND — Analog ground |
| 引脚 33 | AGND — Analog ground |
| 引脚 34 | -IN — Analog negative input |
| 引脚 35 | +IN — Analog positive input |
| 引脚 36 | AGND — Analog ground |
| 引脚 37 | AVDD — Analog supply voltage |
| 引脚 38 | AVDD — Analog supply voltage |
| 引脚 39 | AGND — Analog ground |
| 引脚 40 | AGND — Analog ground |
| 引脚 41 | NC — Not connected |
| 引脚 42 | NC — Not connected |
| 引脚 43 | NC — Not connected |
| 引脚 44 | NC — Not connected |
| 引脚 45 | NC — Not connected |
| 引脚 46 | NC — Not connected |
| 引脚 47 | DGND — Digital ground |
| 引脚 48 | DVDD — Digital supply voltage |
典型应用
ADS8383IBPFBR 适用于 6 应用s: Industrial Process Control Data Acquisition, Medical Instrumentation Signal Digitization, Optical Networking Gain / Power Monitoring, Precision Weigh Scale / Strain-Gauge Digitization, Vibration Analysis and Condition Monitoring, Automatic Test Equipment (ATE) Measurement.
Industrial Process Control Data Acquisition
The ADS8383IBPFBR fits 4-20 mA loop-powered industrial process-control front ends because of its 18-bit NMC linearity and 500 kHz throughput, which lets the system digitize sensor-conditioned signals at high resolution without missing codes over the -40 C to +85 C industrial range. The SAR topology introduces zero latency, so closed-loop control loops see the actual measured value within one conversion cycle rather than waiting for a pipeline to fill. Placed after a current-sense amplifier such as the INA128 and a 4.096 V reference like the REF5040, the part yields 18 ENOB typical, sufficient for SCADA and PLC analog input modules. Unlike a delta-sigma ADC, the ADS8383 does not require an output rate tradeoff for resolution, so it can digitize multiplexed channels at full throughput.
推荐
Medical Instrumentation Signal Digitization
The ADS8383IBPFBR suits medical-instrumentation front ends such as patient monitors, infusion-pump flow meters, and laboratory analyzers because of its 18-bit no-missing-code performance, low micropower dissipation, and zero-latency conversion. The 18-bit resolution preserves dynamic range in vital-signs channels where the smallest measurable signal is critical, while the SAR latency-free behavior simplifies real-time alarm loops. The 48-TQFP package is footprint-compatible with other TI ADS838x family variants, allowing a single PCB design to scale from 14-bit to 18-bit resolution. Unlike a sigma-delta ADC of similar resolution, this SAR part does not require an output-data-rate tradeoff, so the designer can settle on the optimum filter trade-off downstream of the host DSP.
推荐
Optical Networking Gain / Power Monitoring
In optical line cards and EDFA gain monitoring, the ADS8383IBPFBR digitizes photodiode-derived voltage signals at 500 kHz to track fast optical transients. The 18-bit NMC performance ensures the ADC does not skip codes when the photodiode current spans the full dynamic range from nanowatts to milliwatts after TIA amplification. The pseudo-differential +IN/-IN input rejects common-mode noise from switching power supplies typical in optical modules. The parallel 18-bit interface can feed an FPGA directly without clock-speed concerns, supporting the multi-channel photodiode arrays used in coherent optical receivers. The part's micropower dissipation helps meet the strict power budget of pluggable optical transceivers.
推荐
Precision Weigh Scale / Strain-Gauge Digitization
The ADS8383IBPFBR's 18-bit NMC and low-noise floor make it well suited to digitize load-cell and strain-gauge bridge signals in industrial weigh scales and force-measurement systems. The full 18-bit code span over a typical 0-10 mV/V bridge output with a 5 V excitation preserves scale resolution down to fractions of a gram. The SAR zero-latency behavior simplifies force-loop control in dynamic weighing applications such as checkweighers, where the host must react to the measured weight within a single conversion cycle. The 48-TQFP industrial-temperature part operates across the -40 C to +85 C range required for outdoor and factory-floor weigh scales.
推荐
Vibration Analysis and Condition Monitoring
The ADS8383IBPFBR captures vibration signatures from accelerometers and piezo sensors in rotating machinery, motor condition monitoring, and predictive-maintenance sensor nodes. Its 500 kHz sample rate supports mechanical vibration analysis up to the 200 kHz Nyquist, while 18-bit NMC preserves the harmonic content of small vibration amplitudes critical for bearing-fault detection. The SAR topology captures transient events such as shock pulses without pipeline delay, which is essential when capturing rotor-impact signatures. Unlike slower sigma-delta ADCs, the parallel output can be DMA'd directly into an FPGA or DSP FFT engine for real-time spectral analysis at full throughput.
推荐
Automatic Test Equipment (ATE) Measurement
In automated test equipment and bench-top instrumentation, the ADS8383IBPFBR provides a fast, accurate 18-bit digitizer channel for parametric measurement units (PMU), source-measurement units (SMU), and high-speed digitizer cards. The 500 kHz throughput combined with zero SAR latency supports synchronous multi-channel capture in parallel-test architectures, and the 18-bit NMC allows direct measurement of small differential signals without autoranging hardware. The 48-TQFP industrial-temperature part is well suited to bench instruments that must operate across lab environments. The flexible 8/16/18-bit parallel host interface enables connection to legacy 8-bit microcontrollers as well as modern 32-bit DSPs without glue logic.
推荐
推荐产品汇总
工程参考数据： ADS8383IBPFBR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ADS8383IBPFBT | ADS8383IBPFBRG4 | ADS8383IBPFBTG4 | ADS8382IRHPR |
|---|---|---|---|---|---|
| Package | 48-TQFP (PFB) 7x7 mm | 48-TQFP (PFB) 7x7 mm | 48-TQFP (PFB) 7x7 mm | 48-TQFP (PFB) 7x7 mm | 48-TQFP (PFB) 7x7 mm |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 18 bit | 18 bit | 18 bit | 18 bit | 18 bit |
| Sample Rate | 500 kHz | 500 kHz | 500 kHz | 500 kHz | 500 kHz |
| Architecture | SAR | SAR | SAR | SAR | SAR |
| Interface | Parallel 8/16/18-bit | Parallel 8/16/18-bit | Parallel 8/16/18-bit | Parallel 8/16/18-bit | Parallel 8/16/18-bit |
| Input Channels | 1 (unipolar pseudo-differential) | 1 | 1 | 1 | 1 |
| Latency | Zero (SAR) | Zero | Zero | Zero | Zero |
| Operating Temperature | -40 C to +85 C (I-suffix) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Reel Size / Packaging | 13-inch (R) | 7-inch (T) | 13-inch R, G4 | 7-inch T, G4 | 13-inch R |
关键差异点
- True 18-bit NMC over industrial temperature （对比 ADS8383IBPFBT (same die, different reel))
- Zero pipeline latency （对比 ADS8382IRHPR (pipeline ADC alternative))
- Flexible 8/16/18-bit parallel host interface （对比 ADS8381IBPFBR (older generation))
- Micropower dissipation at full speed （对比 ADS8382IRHPR (sister family))
设计说明
Decouple AVDD with a 10 uF tantalum in parallel with a 0.1 uF ceramic placed within 5 mm of the AVDD/AGND pins, and decouple DVDD with a 1 uF ceramic within 5 mm of the DVDD/DGND pins. Use a separate analog ground plane under the analog pins and a single-point ground connection between AGND and DGND directly under the exposed pad. Estimated: ground impedance should be < 0.1 ohm at 500 kHz to keep digital return currents from corrupting the analog input.
Drive the +IN and -IN pins with a low-impedance, bandwidth-limited op-amp (THS4631, OPA227, or OPA2227) placed within 25 mm of the ADC. Add a 20 ohm series resistor plus 1 nF capacitor RC network at the ADC input to limit charge-kickback transients and damp amplifier resonance. Keep digital bus lines (DB[17:0], /RD, /CS) routed on the opposite side of the PCB with no crossings over the analog input traces.
Common pitfalls with the ADS8383IBPFBR: (1) omitting the REFP/REFM bypass network causes gain error and missing codes; use 10 uF tantalum in parallel with 0.1 uF ceramic. (2) Driving +IN/-IN directly with a high-impedance source causes gain non-linearity - always use a driver op-amp. (3) Leaving the -IN pin floating injects common-mode noise; always tie -IN to a low-noise mid-rail reference such as REFP/2 or analog ground. (4) Using an external clock with > 50 ppm jitter degrades SNR; use a crystal or clean CMOS clock source.
For best 18-bit NMC performance, use a 4.096 V external reference such as REF5040 (3 ppm/°C drift, 5 uVpp noise). The internal reference is adequate for 16-bit applications but limits 18-bit absolute accuracy. Run the /CONVST signal with a 25 ns minimum pulse width and route it perpendicular to the analog input traces. Estimated: keep the digital bus loading below 20 pF per line to maintain 500 kHz throughput without bus-driver buffers.
合规信息
RoHS compliant per TI product page. Industrial temperature grade only - not AEC-Q100 qualified. For automotive applications, contact TI regarding ADS8383-Q1 variants.