ADS8343EB/2K5 - 16-Bit 4-Ch 100kHz SAR ADC | Texas Instruments
MPN: ADS8343EB/2K5 ✓ Hoạt độngADS8343EB/2K5 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho ADS8343EB/2K5 — 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 ADS8343EB/2K5 (cùng hình factor và footprint) — khác nhau ở Resolution, SINAD, Input Range, Input Type, Interface.
ADS8343EB/2K5G4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS8343EB
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS8343EBG4
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ADS8343E/2K5
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS8343E
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS8341E/2K5
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS8343EB/2K5 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 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) |
| Giao diện | Synchronous Serial (SPI / QSPI / MICROWIRE-compatible) |
| Package / Mounting | 16-pin SSOP (DBQ) / Surface Mount |
| Trạng thái RoHS | Compliant |
| Pin-for-Pin Compatibility | ADS7841, ADS8341 |
| Packaging Option | Tape and Reel, 2,500 pcs (suffix /2K5) |
Cấu hình chân ADS8343EB/2K5
| Chân 1 | VCC — +2.7 V to +5 V power supply input |
| Chân 2 | CH0 — Analog input channel 0 (single-ended) or CH0+ (differential) |
| Chân 3 | CH1 — Analog input channel 1 (single-ended) or CH0- (differential) |
| Chân 4 | CH2 — Analog input channel 2 (single-ended) or CH1+ (differential) |
| Chân 5 | CH3 — Analog input channel 3 (single-ended) or CH1- (differential) |
| Chân 6 | COM — Common input (analog ground reference for single-ended conversions) |
| Chân 7 | VREF — Voltage reference input (500 mV to VCC) |
| Chân 8 | AGND — Analog ground |
| Chân 9 | DGND — Digital ground |
| Chân 10 | DIN — Serial data input (channel configuration) |
| Chân 11 | DOUT — Serial data output (16-bit conversion result) |
| Chân 12 | DCLK — External serial data clock |
| Chân 13 | CS — Chip select, active low (initiates conversion on falling edge) |
| Chân 14 | BUSY — Output, high while conversion in progress |
| Chân 15 | SHDN — Shutdown input, active high (power-down mode) |
| Chân 16 | GND — Ground (per datasheet) |
Ứng dụng tiêu biểu
ADS8343EB/2K5 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADS8343EB/2K5 — 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 | 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 |
Bảo phân biệt quan trọng
- True pin-for-pin compatibility with the legacy ADS7841 / ADS8341 (vsADS7841PBG4)
- Selectable unipolar 0-VREF or bipolar ±VREF input range (vsADS8343E/2K5)
- RoHS-compliant / G4 green designation on the 2,500-piece reel (vsADS8343EB (tube version))
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
