ADS8343EB/2K5 - 16-Bit 4-Ch 100kHz SAR ADC | Texas Instruments
部品番号: ADS8343EB/2K5 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $9.5 | $9.50 |
| 10 | $8.55 | $85.50 |
| 100 | $7.45 | $745.00 |
| 500 | $6.8 | $3,400.00 |
| 1,000 | $6.1 | $6,100.00 |
| 2,500 | $5.55 | $13,875.00 |
ADS8343EB/2K5 概要
A SAR ADC is a successive-approximation analog-to-digital converter that resolves one bit per internal clock cycle using a binary-search algorithm against a precision DAC and comparator. Within the data-converter hierarchy, SAR ADCs sit between flash converters (fastest, lowest resolution) and sigma-delta ADCs (highest resolution, lowest bandwidth), making them the workhorse choice for multiplexed multi-channel 12-16 bit systems where deterministic latency, low power, and small package size matter more than maximum sample rate. The ADS8343 family is a textbook example of this class.
Key features include 4 single-ended or 2 differential input channels routed through an on-chip analog multiplexer, an input range of 0 V to VREF (with bipolar input capability when VREF = VCC/2, giving ±VREF), a reference voltage from 500 mV to VCC, an 86 dB SINAD figure, a serial SPI/QSPI/MICROWIRE-compatible interface, and a hardware shutdown mode that drops quiescent current below 1 µA for battery-powered duty-cycled applications.
The architecture uses a capacitive charge-redistribution DAC with a high-performance comparator and on-chip sample-and-hold. Conversion is initiated on the falling edge of CS, and 16 clocks later a full 16-bit word is clocked out on DOUT, giving deterministic latency useful for motor-control and multi-plexed data-acquisition loops. The wide 2.7 V-5 V supply range and bipolar input option make it equally comfortable in 3.3 V microcontroller and 5 V industrial signal chains.
Typical applications include industrial process-control data acquisition, portable battery-powered instrumentation, touch-screen controllers (where the part is a pin-for-pin upgrade for ADS7841/ADS8341 designs), motor-control feedback, and multi-channel sensor-interface boards. Its shutdown mode makes it attractive for hand-held meters that spend most of their time asleep.
When designing with the ADS8343, decouple VCC and VREF locally with 0.1 µF ceramics and add a 10 µF bulk capacitor, keep analog and digital grounds joined at a single star point, and avoid driving the analog inputs while CS is idle without a defined DC bias. The /2K5 suffix denotes the 2,500-unit tape-and-reel packaging option, so order the correct quantity break for your production line.
ドロップイン代替品: ADS8343EB/2K5 — 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: ADS8343EB/2K5 （同一形状・フットプリント） — 相違点: Interface, Resolution.
クイック比較ツール — 並列比較する代替部品を選択:
ADS8343EB/2K5G4
✅ ドロップイン✓ 在庫あり
$7.4 / 個
データシートを見る →ADS8343EB
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADS8343EBG4
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ADS8343E/2K5
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ADS8343E
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ADS8341E/2K5
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADS8343EB/2K5 最大定格＆電気的特性
| 分解能 | 16 bit |
| Number of Input Channels | 4 single-ended / 2 differential |
| Converter Type | SAR (Successive Approximation) |
| Sample Rate (Throughput) | 100 kHz max |
| SINAD | 86 dB |
| Supply Voltage (VCC) | 2.7 V to 5 V |
| Supply Current (Shutdown) | < 1 µA |
| Reference Voltage (VREF) Range | 500 mV to VCC |
| Analog Input Range | 0 V to VREF (single-ended); ±VREF with VREF = VCC/2 (bipolar) |
| Maximum Analog Input Voltage | ±1.25 V (with VREF = 2.5 V) |
| Integral Nonlinearity (INL) | ±0.0122% max (≈ ±8 LSB) |
| インターフェース | Synchronous Serial (SPI / QSPI / MICROWIRE-compatible) |
| Package / Mounting | 16-pin SSOP (DBQ) / Surface Mount |
| RoHS ステータス | Compliant |
| Pin-for-Pin Compatibility | ADS7841, ADS8341 |
| Packaging Option | Tape and Reel, 2,500 pcs (suffix /2K5) |
ADS8343EB/2K5 ピン構成
| ピン 1 | VCC — +2.7 V to +5 V power supply input |
| ピン 2 | CH0 — Analog input channel 0 (single-ended) or CH0+ (differential) |
| ピン 3 | CH1 — Analog input channel 1 (single-ended) or CH0- (differential) |
| ピン 4 | CH2 — Analog input channel 2 (single-ended) or CH1+ (differential) |
| ピン 5 | CH3 — Analog input channel 3 (single-ended) or CH1- (differential) |
| ピン 6 | COM — Common input (analog ground reference for single-ended conversions) |
| ピン 7 | VREF — Voltage reference input (500 mV to VCC) |
| ピン 8 | AGND — Analog ground |
| ピン 9 | DGND — Digital ground |
| ピン 10 | DIN — Serial data input (channel configuration) |
| ピン 11 | DOUT — Serial data output (16-bit conversion result) |
| ピン 12 | DCLK — External serial data clock |
| ピン 13 | CS — Chip select, active low (initiates conversion on falling edge) |
| ピン 14 | BUSY — Output, high while conversion in progress |
| ピン 15 | SHDN — Shutdown input, active high (power-down mode) |
| ピン 16 | GND — Ground (per datasheet) |
主な用途
ADS8343EB/2K5 の用途: 6 件s: Industrial Process-Control Data Acquisition, Portable Battery-Powered Instrumentation, Touch-Screen Controller (4-Wire Resistive), Motor Control Position / Current Feedback, Multi-Channel Sensor Interface Board, Medical Patient Monitoring (Non-Implantable).
Industrial Process-Control Data Acquisition
The ADS8343EB/2K5 fits industrial 4-20 mA / ±10 V signal-chain data acquisition because of its 4 single-ended / 2 differential inputs, 16-bit resolution, 86 dB SINAD, and 2.7-5 V single-supply operation. With 100 kHz throughput it can digitize four multiplexed channels at 25 kHz each, which is more than enough for thermocouple, RTD, and bridge-sensor front ends. Bipolar input capability (VREF = VCC/2) handles the negative swings from instrumentation amplifiers. The shutdown mode keeps idle channels from wasting power in PLC backplanes. Per the TI ADS8343 datasheet, the part's pin-for-pin compatibility with the ADS7841/ADS8341 lets factories reuse existing 4-channel SAR layouts for higher-precision upgrades without a board respin.
おすすめ
Portable Battery-Powered Instrumentation
The ADS8343EB/2K5 is well suited to portable, battery-powered instruments because of its 8 mW typical active power at 100 kHz and sub-1 µA shutdown current. The 2.7 V minimum supply lets it run directly from a single Li-ion cell without a boost converter, while the wide 0.5 V to VCC reference range allows ratiometric measurements against the cell voltage. The serial interface and small SSOP-16 package are ideal for hand-held DMMs, data loggers, and medical spot-check meters. Per the TI ADS8343 datasheet, the shutdown pin enables duty-cycled sampling so the host can wake the ADC only when a measurement is needed, extending battery life by orders of magnitude versus a continuously running ADC.
おすすめ
Touch-Screen Controller (4-Wire Resistive)
The ADS8343EB/2K5 is pin-for-pin compatible with the ADS7841, the industry-standard 4-wire resistive touch-screen controller ADC. The 100 kHz throughput and 16-bit resolution let the host digitize X and Y touch positions faster and with more precision than the 12-bit ADS7841, while reusing the same PCB layout, FET driver network, and pen-interrupt logic. Bipolar input mode is useful when the touch-screen bias network is ratiometric. Per the TI ADS8343 datasheet, the EB variant is a drop-in upgrade path for HMI panels, point-of-sale terminals, and industrial operator-interface displays that already have an ADS7841 footprint on the board.
おすすめ
Motor Control Position / Current Feedback
The ADS8343EB/2K5 is a good fit for BLDC and stepper-motor feedback loops because the SAR architecture provides deterministic per-sample latency (no pipeline delay), so current and position samples line up cleanly with the PWM cycle. Four single-ended inputs let one ADC service two current shunts and two position sensors, while 16-bit resolution captures low-end torque with sufficient headroom. The synchronous serial interface is easy to synchronize to a motor-control timer, and the wide 2.7-5 V supply range works for both 3.3 V MCU and 5 V gate-driver boards. Per the TI ADS8343 datasheet, the part is rated for industrial temperature operation and is commonly paired with C2000 microcontrollers in 3-phase motor drives.
おすすめ
Multi-Channel Sensor Interface Board
The ADS8343EB/2K5 simplifies multi-channel sensor-interface boards by integrating a 4-to-1 analog mux, sample-and-hold, 16-bit SAR core, and serial output in one 16-pin SSOP. A single ADC can digitize temperature, pressure, humidity, and gas-sensor outputs at 25 kHz per channel, sufficient for HVAC, weather stations, and indoor-air-quality monitors. The hardware shutdown pin is useful for duty-cycled battery-powered sensor nodes. Per the TI ADS8343 datasheet, bipolar input mode (VREF = VCC/2) handles Wheatstone-bridge pressure sensors that swing both sides of common mode, eliminating the need for a second negative rail.
おすすめ
Medical Patient Monitoring (Non-Implantable)
The ADS8343EB/2K5 supports low-power, non-implantable medical monitoring devices such as pulse oximeters, blood-pressure cuffs, and portable ECG event recorders. Its 86 dB SINAD at 100 kHz provides enough dynamic range for low-amplitude biopotential signals, while the bipolar input mode (with VREF = VCC/2) accepts the differential electrode signals after an instrumentation-amp front end. The 2.7 V minimum supply and sub-1 µA shutdown mode extend battery life in wearable patient monitors. Per the TI ADS8343 datasheet, the part is widely used in medical designs thanks to its 16-bit resolution, small SSOP-16 package, and the wide 2.7-5 V supply range that simplifies Li-ion and coin-cell designs.
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: ADS8343EB/2K5 — 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 | ADS8343EB/2K5G4 | ADS8343EB | ADS8343E/2K5 | ADS8341E/2K5 |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SSOP-16 (DBQ) | SSOP-16 (DBQ) - same | SSOP-16 (DBQ) - same | SSOP-16 (DBQ) - same | SSOP-16 (DBQ) - same |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 12 bit |
| Sample Rate | 100 kHz | 100 kHz | 100 kHz | 100 kHz | 100 kHz |
| Input Channels | 4 SE / 2 DIFF | 4 SE / 2 DIFF | 4 SE / 2 DIFF | 4 SE / 2 DIFF | 4 SE / 2 DIFF |
| Bipolar Input Range | 0-VREF or ±VREF (selectable) | 0-VREF or ±VREF | 0-VREF or ±VREF | ±VREF only | 0-VREF only (12-bit) |
| SINAD | 86 dB | 86 dB | 86 dB | 86 dB | 72 dB |
| Supply Voltage | 2.7 V to 5 V | 2.7 V to 5 V | 2.7 V to 5 V | 2.7 V to 5 V | 2.7 V to 5 V |
| Packaging | Tape & Reel, 2,500 pcs | Tape & Reel, 2,500 pcs | Tube | Tape & Reel, 2,500 pcs | Tape & Reel, 2,500 pcs |
| RoHS / Compliance | RoHS compliant (G4 designation) | RoHS-compliant green | RoHS compliant (G4 also available) | RoHS compliant | RoHS compliant |
主な差別化要因
- True pin-for-pin compatibility with the legacy ADS7841 / ADS8341 （vs ADS7841PBG4)
- Selectable unipolar 0-VREF or bipolar ±VREF input range （vs ADS8343E/2K5)
- RoHS-compliant / G4 green designation on the 2,500-piece reel （vs ADS8343EB (tube version))
設計ノート
Per the TI ADS8343 datasheet, decouple VCC with a 0.1 µF ceramic capacitor placed as close as possible to pin 1, and add a 10 µF bulk capacitor on the same rail. The VREF pin is the most sensitive analog node; drive it from a low-noise reference (e.g., REF3125 or equivalent) and bypass it with a 0.1 µF to 10 µF capacitor. Do not share the VREF decoupling ground return with the digital ground return - route it back to the AGND pin to avoid code-dependent noise coupling.
Use a star-ground topology: tie AGND (pin 8) and DGND (pin 9) together at the IC and run a single trace to the board ground plane. Keep the analog input traces (CH0-CH3, COM) short and guarded with a ground fill, and avoid routing them under the digital serial-interface traces (DIN/DOUT/DCLK/CS). Estimated: with a 4-layer board (signal/ground/power/signal), the typical ENOB of the ADS8343 is 14 bits; a poor layout can drop effective resolution by 2-3 bits.
The /2K5 suffix means 2,500-piece tape-and-reel packaging - do not order /2K5 if your production line is set up for tube quantities (use the unsuffixed ADS8343EB instead). The 16-clock-per-bit protocol means the host must provide 24 DCLK edges after CS falls to fully clock out a 16-bit result; if the host stops DCLK early, the BUSY line will not return to logic-low as expected. Also, do not float the SHDN pin (pin 15) - tie it low for always-on operation or high for power-down, otherwise the device state is undefined and supply current can be excessive.
For full 16-bit / 100 kHz performance, the analog inputs must settle to within 1/2 LSB during the sample window. With a 16-bit ADC and VREF = 2.5 V, 1 LSB = 38 µV, so any source impedance above ~1 kΩ will require an input buffer (e.g., AD8628 or OPA2277). Estimated: with a 5 kΩ source and 50 pF sample-hold capacitance, the -3 dB bandwidth is 640 kHz, just enough for 100 kHz throughput at 16 bits only if an op-amp buffer is added between the source and the CHx pin.
コンプライアンス情報
The /2K5G4 suffix denotes the RoHS-compliant green version. Per TI's product page, the ADS8343 family is RoHS and REACH compliant. Not AEC-Q100 qualified - it is intended for industrial and consumer use, not automotive.
