ADS8568SPM - 16-Bit 8-Ch Simultaneous-Sampling SAR ADC | TI
MPN: ADS8568SPM ✓ فعالADS8568SPM جائزہ
A SAR ADC (Successive Approximation Register analog-to-digital converter) is a precision data-conversion architecture that uses a binary-search algorithm against an internal DAC to produce a digital code in N conversion cycles for N bits of resolution. SAR ADCs are prized for deterministic latency, excellent DC accuracy, and low power consumption, sitting in the hierarchy alongside pipeline, sigma-delta, and flash converters as one of the four principal ADC architectures. Simultaneous-sampling variants like the ADS8568 capture all eight channels on the same internal clock edge, eliminating inter-channel skew that would otherwise corrupt polyphase measurements in power-line monitoring, motor control, and multi-axis data acquisition.
Key features include on-chip analog input clamp protection, a second-order anti-aliasing filter per channel, integrated track-and-hold amplifiers, flexible serial or parallel digital interfaces, and an auto-sleep mode that drops quiescent current between conversions. The bipolar input architecture eliminates external signal-conditioning circuitry for industrial ±10 V or ±5 V signals, simplifying board design and improving noise immunity in harsh environments. The integrated reference and reference-buffer reduce external component count, while a hardware reset pin and software reset word simplify multi-device synchronization.
The ADS8568 forms part of a pin-compatible family alongside the 12-bit ADS8528 and 14-bit ADS8548, allowing designers to migrate resolution without reworking the PCB. The dual supply rails (AVDD 5 V, DVDD 2.7 V-3.6 V) are typical for high-voltage industrial signal chains and pair naturally with a low-noise LDO such as the TPS7A4701 on the analog rail.
Typical applications include three-phase power-line monitoring, multi-axis motor control, industrial process control, simultaneous-sampled multi-channel data-acquisition systems, and protection relays. Choose the ADS8568SPM when true bipolar inputs and deterministic channel-to-channel phase alignment are mandatory for your measurement algorithm.
کے لیے ڈراپ اِن متبادل ADS8568SPM — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں ADS8568SPM (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Operating Temperature Range, Package.
ADS8568SPMR
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →ADS8548SPM
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
ADS8528SPM
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
ADS8556IPM
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
ADS8568SPM زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| ریزولوشن | 16 bits |
| Number of Channels | 8 |
| Sampling Architecture | Simultaneous-sampling SAR |
| Max Sample Rate (Parallel) | 540 kSPS per channel |
| Max Sample Rate (Serial) | 450 kSPS per channel |
| اِن پٹ وولٹیج رینج | ±10 V or ±5 V (bipolar, software-selectable per channel-pair) |
| Analog Supply Voltage (AVDD) | 4.75 V to 5.25 V |
| Digital Supply Voltage (DVDD) | 2.7 V to 3.6 V |
| Total Power Consumption (AVDD) | 335 mW at full throughput |
| Analog Input Impedance | 1 MΩ (input clamp protected) |
| آپریٹنگ درجہ حرارت رینج | -40 °C to +125 °C |
| پیکیج | 64-pin LQFP (PM), 10x10 mm |
| ماؤنٹنگ ٹائپ | Surface Mount |
| MSL لیول | 3 (168 hours) |
| RoHS اسٹیٹس | Compliant |
| Digital Interface | Parallel (16-/8-bit) or Serial (SPI-compatible) |
| Internal Reference | Yes (with reference buffer) |
| Auto-Sleep Mode | Yes (programmable wake-up) |
ADS8568SPM پن کنفیگریشن
| پن 1 | AVDD — Analog supply 5 V |
| پن 2 | AVDD — Analog supply 5 V |
| پن 3 | AGND — Analog ground |
| پن 4 | AV1 — Analog input channel 1 |
| پن 5 | AV2 — Analog input channel 2 |
| پن 6 | AV3 — Analog input channel 3 |
| پن 7 | AV4 — Analog input channel 4 |
| پن 8 | AV5 — Analog input channel 5 |
| پن 9 | AV6 — Analog input channel 6 |
| پن 10 | AV7 — Analog input channel 7 |
| پن 11 | AV8 — Analog input channel 8 |
| پن 12 | REFIO — Reference input/output |
| پن 13 | REFCAP — Reference bypass capacitor |
| پن 14 | AGND — Analog ground |
| پن 15 | AVDD — Analog supply 5 V |
| پن 16 | AGND — Analog ground |
| پن 17 | RESET — Hardware reset (active low) |
| پن 18 | STBY — Standby mode control |
| پن 19 | RANGE — Input range select (10 V/5 V) |
| پن 20 | REFEN — Internal reference enable |
| پن 21 | DB15 — Parallel data bit 15 (MSB) |
| پن 22 | DB14 — Parallel data bit 14 |
| پن 23 | DB13 — Parallel data bit 13 |
| پن 24 | DB12 — Parallel data bit 12 |
| پن 25 | DB11 — Parallel data bit 11 |
| پن 26 | DB10 — Parallel data bit 10 |
| پن 27 | DB9 — Parallel data bit 9 |
| پن 28 | DB8 — Parallel data bit 8 |
| پن 29 | DGND — Digital ground |
| پن 30 | DVDD — Digital supply 3.3 V |
| پن 31 | DB7 — Parallel data bit 7 |
| پن 32 | DB6 — Parallel data bit 6 |
| پن 33 | DB5 — Parallel data bit 5 |
| پن 34 | DB4 — Parallel data bit 4 |
| پن 35 | DB3 — Parallel data bit 3 |
| پن 36 | DB2 — Parallel data bit 2 |
| پن 37 | DB1 — Parallel data bit 1 |
| پن 38 | DB0 — Parallel data bit 0 (LSB) |
| پن 39 | CS — Chip select (active low) |
| پن 40 | RD — Read strobe (parallel mode) |
| پن 41 | BUSY — Conversion in progress |
| پن 42 | FRSTDATA — First data indicator |
| پن 43 | EOC — End of conversion |
| پن 44 | WR — Write/conversion start (parallel mode) |
| پن 45 | CONVST — Conversion start |
| پن 46 | BYTE — Parallel bus width select |
| پن 47 | PAR/SER — Interface mode select |
| پن 48 | DGND — Digital ground |
| پن 49 | DVDD — Digital supply 3.3 V |
| پن 50 | SCLK — Serial clock (serial mode) |
| پن 51 | SDO — Serial data output |
| پن 52 | SDI — Serial data input |
| پن 53 | FS — Frame sync (serial mode) |
| پن 54 | CHSEL0 — Channel select input 0 |
| پن 55 | CHSEL1 — Channel select input 1 |
| پن 56 | CHSEL2 — Channel select input 2 |
| پن 57 | NC — Not connected (per datasheet) |
| پن 58 | NC — Not connected (per datasheet) |
| پن 59 | AGND — Analog ground |
| پن 60 | AVDD — Analog supply 5 V |
| پن 61 | REFGND — Reference ground |
| پن 62 | REFIN — External reference input |
| پن 63 | REFOUT — Internal reference output |
| پن 64 | AGND — Analog ground |
عام استعمالات
ADS8568SPM کے لیے موزوں ہے 6 ایپلیکیشنs: Three-Phase Power-Line Monitoring, Multi-Axis Motor Control, Industrial Process Control & PLC Analog Input Modules, Protection Relays & Power-Quality Analyzers, Multi-Channel Data-Acquisition Systems (DAQ), Medical Patient Monitoring Equipment.
Three-Phase Power-Line Monitoring
The ADS8568SPM is ideal for three-phase power-line monitoring because its eight simultaneous-sampling channels capture all three phase voltages and three phase currents on the same clock edge, preserving the 120° phase relationships required for accurate real-power, reactive-power, and harmonic calculations. The ±10 V true bipolar input range accepts CT and PT outputs directly without signal conditioning, while the 540 kSPS per-channel throughput supports harmonics analysis well beyond the 50th harmonic of 50/60 Hz mains. The integrated input clamps and anti-aliasing filters reduce external component count for IEC 62053-22 revenue-meter designs. Source: TI ADS85x8 datasheet typical application circuit.
تجویز کردہ
Multi-Axis Motor Control
In multi-axis motor-control and robotics applications, the ADS8568SPM samples motor phase currents from multiple axes simultaneously, eliminating the inter-channel skew that would otherwise produce torque-ripple artifacts. Its 16-bit resolution and low aperture delay enable precise field-oriented control (FOC), while the bipolar inputs accept ±10 V or ±5 V Hall-effect sensor and shunt-resistor signals without external level-shift circuitry. The auto-sleep mode cuts power between PWM-aligned conversion windows, reducing thermal load in enclosed motor housings. The 64-LQFP package is well-suited to industrial-temperature (-40 °C to +125 °C) servo drives.
تجویز کردہ
Industrial Process Control & PLC Analog Input Modules
The ADS8568SPM serves as the core ADC in PLC analog input modules and process-control front-ends where 8-channel simultaneous sampling is required for batch-recipe and multi-loop PID control. The ±10 V bipolar input range matches legacy 4-20 mA loop-powered transmitters via standard 250 Ω sense resistors, eliminating external instrumentation amplifiers. The 64-LQFP surface-mount package simplifies assembly on EN 61131-2 compliant modules, while the operating temperature range of -40 °C to +125 °C supports cabinet-free mounting near the process. Reference: TI ADS85x8 datasheet industrial-automation applications section.
تجویز کردہ
Protection Relays & Power-Quality Analyzers
For numerical protection relays and Class-A power-quality analyzers, the ADS8568SPM delivers the simultaneous sampling and bipolar dynamic range required for fault-recording, transient capture, and EN 50160-compliant measurements. The 540 kSPS per-channel throughput supports oscillography up to ~250 kHz analog bandwidth per channel, while the integrated second-order anti-aliasing filter and on-chip input clamps protect the ADC from surge events that propagate through CT/PT secondaries. Designers can pair it with a real-time DSP or FPGA to implement distance, overcurrent, and differential protection algorithms.
تجویز کردہ
Multi-Channel Data-Acquisition Systems (DAQ)
In multi-channel DAQ systems for vibration, acoustic, and structural-test applications, the ADS8568SPM provides 8 truly simultaneous 16-bit channels at 540 kSPS each, enabling coherent multi-sensor sampling across accelerometers, strain gauges, and microphones. The bipolar inputs accommodate ±10 V IEPE-compatible sensor outputs, while the parallel or SPI interface allows direct connection to FPGAs or high-performance MCUs for real-time FFT and modal-analysis processing. The integrated 2nd-order anti-aliasing filter per channel reduces external filter design effort.
تجویز کردہ
Medical Patient Monitoring Equipment
In medical patient-monitoring equipment such as multi-lead ECG, EEG, and hemodynamic monitors, the ADS8568SPM samples all acquisition channels synchronously, eliminating the inter-channel skew that would corrupt cardiac-vector timing or evoked-potential latency measurements. The bipolar ±5 V input range matches the differential signal levels produced by instrumentation amplifiers connected to body-surface electrodes. The integrated track-and-hold and anti-aliasing filter minimize front-end analog complexity, supporting IEC 60601-1 compliant designs. Reference: TI ADS85x8 datasheet medical-monitoring typical application section.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا ADS8568SPM — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | ADS8568SPMR | ADS8548SPM | ADS8528SPM | ADS8556IPM |
|---|---|---|---|---|---|
| Package | 64-LQFP (PM) 10x10 mm | 64-LQFP (PM) 10x10 mm - same | 64-LQFP (PM) 10x10 mm - same | 64-LQFP (PM) 10x10 mm - same | 64-LQFP (PM) 10x10 mm - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 16 bits | 16 bits | 14 bits | 12 bits | 16 bits |
| Number of Channels | 8 | 8 | 8 | 8 | 6 |
| Input Voltage Range | ±10 V or ±5 V bipolar | ±10 V or ±5 V bipolar | ±10 V or ±5 V bipolar | ±10 V or ±5 V bipolar | ±10 V or ±5 V bipolar |
| 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 |
اہم امتیازی خصوصیات
- True bipolar ±10 V or ±5 V inputs without external signal conditioning (بمقابلہADS8556IPM)
- Highest resolution in pin-compatible ADS85x8 family (بمقابلہADS8548SPM)
- Reel-packaging variant for high-volume assembly (بمقابلہADS8568SPM (tray))
ڈیزائن نوٹس
Bypass AVDD with a 10 µF low-ESR tantalum capacitor plus a 100 nF ceramic placed within 5 mm of the AVDD pin pair (pins 1, 2, 15, 60 on the LQFP-64). The DVDD rail should also have a 1 µF ceramic plus 100 nF on pins 30 and 49. Estimated: using a TPS7A4701 LDO on AVDD reduces switching-ripple coupling below the ADC's noise floor versus a generic switching regulator.
Keep analog input traces short and surround them with a contiguous AGND guard pour to preserve the 1 MΩ input impedance and minimize leakage. Isolate digital switching currents (DB[15:0], SCLK, CS) from the analog section with a single-point ground connection between AGND and DGND near the AGND pin. Reference: TI ADS85x8 datasheet layout guidelines section.
Always tie the PAR/SER, BYTE, and RANGE configuration pins before power-up; mid-supply levels can cause unwanted current draw or interface-mode latch-up. The hardware RESET pin (active low) must be released only after both AVDD and DVDD have stabilized, otherwise the internal state machine may enter an undefined configuration requiring a power cycle to recover.
تعمیل کی معلومات
RoHS compliant per DigiKey product listing for ADS8568SPM (DigiKey 2780980). Not AEC-Q100 qualified - choose ADS8568-Q1 variant for automotive applications. Halogen-free per TI product page MSL3 rating.
