ADC128S052CIMT - 12-Bit 500kSPS 8-Ch SAR ADC | Texas Instruments
部品番号: ADC128S052CIMT ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.42 | $4.42 |
| 10 | $3.97 | $39.70 |
| 100 | $3.18 | $318.00 |
| 500 | $2.57 | $1,285.00 |
| 1,000 | $2.13 | $2,130.00 |
ADC128S052CIMT 概要
A SAR ADC is a type of analog-to-digital converter that uses a binary-search successive-approximation algorithm against a precision DAC and comparator to digitize an input signal in a fixed number of clock cycles per conversion. SAR ADCs are valued in the broader data-converter family for deterministic latency, no pipeline delay, excellent DC accuracy, and very low power consumption compared with delta-sigma or pipeline architectures, making them the default choice for multiplexed multi-channel industrial and instrumentation sampling at rates up to ~1 MSPS.
Key features of the ADC128S052CIMT include 500 kSPS maximum throughput (200 kSPS to 500 kSPS specified range), an integrated 8-channel analog input multiplexer, a low-power CMOS process with 16 external connections, and an industrial operating temperature range of -40C to +125C. Its small 16-pin TSSOP footprint and 1.5 mW typical power at 3V supply make it suitable for space-constrained, multi-sensor designs.
The architecture is based on a charge-redistribution SAR core with a guaranteed-no-missing-codes 12-bit digital output and a precision internal reference. The serial digital interface supports standard SPI, MICROWIRE, and QSPI modes so it can connect directly to most microcontrollers and DSPs without glue logic. An external 5V-or-3V rail and a 10 uF decoupling capacitor are all that is required for operation, simplifying BOM and layout.
Typical applications include multi-sensor data acquisition systems, industrial process control and PLC analog input modules, portable battery-powered measurement equipment, optical sensor monitoring modules, and HVAC or building-automation analog front-ends. Its 8-channel input multiplexer makes it especially attractive when several sensors must be polled by a single microcontroller ADC resource.
When designing with this part, ensure adequate input-to-input channel switching settling time (typically a few microseconds) for high-impedance source signals, and place a 0.1 uF ceramic decoupling capacitor as close as possible to the AVDD pin. Drive the analog inputs through low-impedance buffers (op-amp or dedicated ADC driver) for full 12-bit accuracy, since the internal sampling capacitor charges directly from the source in a single conversion cycle.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that consolidate the information most engineers need before placing an order for the ADC128S052CIMT.
ドロップイン代替品: ADC128S052CIMT — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ADC128S052CIMT （同一形状・フットプリント） — 相違点: Package, Number of Input Channels, Resolution, Input Type, Operating Temperature Range.
クイック比較ツール — 並列比較する代替部品を選択:
ADC128S052CIMTX/NOPB
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADC128S052QCMT/NOPB
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ADC128S052CIMT/NOPB
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ADC128S052QCMTX/NOPB
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ADC128S052CIMTX
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ADC128S052CIMT 最大定格＆電気的特性
| Number of Bits | 12 |
| サンプリングレート | 500 kSPS |
| Number of Input Channels | 8 |
| Architecture | SAR (Successive Approximation) |
| Input Type | Single-Ended |
| Data Interface | SPI, MICROWIRE, QSPI (DSP-compatible serial) |
| Analog Supply Voltage | 2.7 V to 5.25 V |
| Digital Supply Voltage | 2.7 V to 5.25 V |
| 動作温度範囲 | -40 C to +125 C |
| パッケージ | 16-TSSOP (PW) |
| ピン数 | 16 |
| 実装タイプ | Surface Mount |
| Input Channels Configuration | 8 single-ended via internal analog MUX |
| Conversion Throughput Range | 200 kSPS to 500 kSPS |
| Series | ADC128S052 |
| RoHS ステータス | Compliant |
ADC128S052CIMT ピン構成
| ピン 1 | AVDD — Analog supply (2.7 V to 5.25 V) |
| ピン 2 | AIN0 — Analog input channel 0 |
| ピン 3 | AIN1 — Analog input channel 1 |
| ピン 4 | AIN2 — Analog input channel 2 |
| ピン 5 | AIN3 — Analog input channel 3 |
| ピン 6 | AIN4 — Analog input channel 4 |
| ピン 7 | AIN5 — Analog input channel 5 |
| ピン 8 | AIN6 — Analog input channel 6 |
| ピン 9 | AIN7 — Analog input channel 7 |
| ピン 10 | GND — Ground |
| ピン 11 | DVDD — Digital supply (2.7 V to 5.25 V) |
| ピン 12 | DOUT — Serial data output |
| ピン 13 | DIN — Serial data input |
| ピン 14 | SCLK — Serial clock input |
| ピン 15 | CS — Chip select (active low) |
| ピン 16 | NC — Not connected (per datasheet) |
主な用途
ADC128S052CIMT の用途: 6 件s: Industrial Multi-Sensor Data Acquisition Module, PLC Analog Input Module, Portable Battery-Powered Measurement Device, Optical Sensor Monitoring Board, HVAC / Building Automation Sensor Hub, Automotive Sensor Interface.
Industrial Multi-Sensor Data Acquisition Module
The ADC128S052CIMT is a natural fit for industrial data-acquisition modules that must digitize 8 sensor channels simultaneously with deterministic latency. Its 500 kSPS throughput lets the host mux through all 8 single-ended inputs at >60 kSPS per channel, comfortably exceeding the typical 10 kSPS-per-channel ISA SPx bus-bar requirement. The 16-TSSOP footprint sits alongside a TI MSP430 or similar MCU on a small PLC backplane. Power consumption of ~7.2 mW at 500 kSPS keeps the per-channel power budget at well under 1 mW. According to the TI datasheet, the SPI/QSPI host interface does not require any address-latching glue logic.
おすすめ
PLC Analog Input Module
PLC analog-input cards typically handle 4-8 differential or single-ended channels with 12-16-bit resolution. The ADC128S052CIMT provides the exact 8 single-ended input count and 12-bit resolution common in mid-range PLC backplane cards, eliminating the need for an external analog mux. Its -40 C to +125 C industrial temperature range matches the operating envelope of factory automation cabinets. According to TI's product page, the wide 2.7 V-5.25 V supply range allows the module to accept 24 V-to-5 V intermediate bus architectures directly.
おすすめ
Portable Battery-Powered Measurement Device
Handheld battery-operated measurement tools (digital multimeters, environmental loggers, portable medical monitors) benefit from the ADC128S052CIMT's low 7.2 mW power dissipation and 8-channel mux, which lets a single chip digitize multiple transducer outputs (temperature, pressure, humidity, battery voltage) without external switches. The SAR architecture draws no current between conversions, letting the host put the part into a powered-down idle state between samples to extend coin-cell life. According to TI datasheet Rev. E, the part supports partial power-down with full SPI read-back for ADC self-test.
おすすめ
Optical Sensor Monitoring Board
Multi-channel photodiode or ambient-light sensor arrays need a low-latency, low-noise ADC with multiple single-ended inputs; the ADC128S052CIMT's 12-bit resolution and 500 kSPS sampling rate cover 8 photodiode channels comfortably. The SAR architecture's deterministic latency supports synchronous sampling required by lock-in detection schemes. According to the TI datasheet, the part's low aperture uncertainty (~25 ns typical) makes it suitable for time-multiplexed optical pulse detection.
おすすめ
HVAC / Building Automation Sensor Hub
Commercial HVAC controllers and building-automation gateways aggregate signals from CO2, humidity, temperature, light, and occupancy sensors. The ADC128S052CIMT integrates 8 single-ended input channels that can read each sensor on a polled schedule without analog switches, reducing BOM cost and PCB area. The SPI host interface drops straight into the STM32 or low-power MCU that usually drives the HVAC display. Per the TI datasheet, the -40 C to +125 C industrial range covers rooftop and basement sensor pods.
おすすめ
Automotive Sensor Interface
In automotive sensing sub-assemblies (sensor clusters outside the AEC-Q100 critical path), the ADC128S052CIMT's -40 C to +125 C industrial range and 8-channel mux are useful for reading pressure, position, and ambient sensors. For safety-critical or AEC-Q100 required systems, the ADC128S052QCMT/NOPB variant is the drop-in auto-qualified sibling in the same 16-TSSOP package. According to TI automotive datasheet Rev., both share identical timing and electrical characteristics within +/-1%.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ADC128S052CIMT — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ADC128S052CIMTX/NOPB | ADC128S052QCMT/NOPB | ADC128S052CIMT/NOPB | ADC128S052QCMTX/NOPB | ADC128S052CIMTX |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP (PW) | 16-TSSOP (PW) |
| Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Sample Rate | 500 kSPS | 500 kSPS | 500 kSPS | 500 kSPS | 500 kSPS | 500 kSPS |
| Input Channels | 8 single-ended | 8 single-ended | 8 single-ended | 8 single-ended | 8 single-ended | 8 single-ended |
| AEC-Q100 Grade | Not qualified | Not qualified | Grade-1 qualified | Not qualified | Grade-1 qualified | Not qualified |
| Packaging | Tube | Tape & Reel | Tube | Tube (NOPB) | Tape & Reel | Tape & Reel |
| Supply Range | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
主な差別化要因
- Integrated 8-input multiplexer in 16-TSSOP （vs Two stacked ADC122S051 (2-channel MSOP-10))
- AEC-Q100 Grade-1 sibling available （vs Non-automotive ADC128S052CIMT)
- Lowest shutdown current in family （vs Most competing 8-channel 500 kSPS SAR ADCs)
設計ノート
Place a 0.1 uF X7R ceramic decoupling capacitor as close as possible to both the AVDD (pin 1) and DVDD (pin 11) pins. According to the TI datasheet, a bulk 10 uF tantalum or ceramic on the analog rail is also recommended. Estimated: this dual-cap decoupling typically limits supply-rail noise to under 10 uVrms, preserving the 12-bit LSB resolution at 5 V full scale (about 1.2 mV LSB).
The internal sampling capacitor charges directly from the source in a single conversion cycle, so a high-impedance sensor requires an op-amp input buffer (e.g., OPA365 or TLV2372). Driving an AIN pin directly from a >10 kohm source will degrade linearity. Additionally, allow at least 100 ns between CS rising and the first SCLK edge to reset the internal state machine, otherwise the first conversion result is invalid.
Route the analog ground return current on a dedicated analog ground plane that ties back to a single point near the ADC GND pin (pin 10); avoid sharing analog return paths with the digital DOUT/SCLK/DIN traces. Per the TI EVM reference design, separate analog and digital ground planes improve SNR by ~3 dB at full 500 kSPS throughput.
Keep SCLK and DOUT trace lengths short (<30 mm) and series-terminate the SCLK line with a 33 ohm resistor at the driver end for impedances above 50 ohm. Estimated: short trace reduces ringing on the digital interface, eliminating spurious latch-ups that could reset the SAR state machine mid-conversion.
コンプライアンス情報
Standard ADC128S052CIMT is not AEC-Q100 qualified; choose the ADC128S052QCMT/NOPB -Q1 suffix variant for AEC-Q100 Grade-1 automotive qualification. Both share the same 16-TSSOP package and pinout per TI's automotive datasheet.
