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Texas Instruments ADS7887SDCKT
- Part No.:
- ADS7887SDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
ADS7887SDCKT.pdf
- Description:
- IC ADC 10BIT SAR SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:214
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Product details
Overview
ADS7887SDCKT from Texas Instruments is a 10-bit, 1.25-MSPS SAR analog-to-digital converter in a 6-pin SC70 package, featuring zero latency, 25-MHz serial interface, ±0.35 LSB INL, and unipolar 0 V to VDD input range. It operates from 2.35 V to 5.25 V and delivers 61 dB SINAD at 100 kHz - ideal for high-speed closed-loop motor current sensing in digital drives.
For engineers reviewing the ADS7887SDCKT datasheet, ADS7887SDCKT pinout, ADS7887SDCKT application, or ADS7887SDCKT equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternatives, and supply-chain support for industrial embedded and battery-powered systems.
Technical Context
The ADS7887SDCKT implements a capacitor-based successive approximation register (SAR) architecture with integrated sample-and-hold, initiating conversion on the falling edge of CS and outputting 14-bit serial frames (4 leading zeros + 10-bit MSB-first data + 2 trailing zeros) synchronized to SCLK. Its zero-latency operation ensures immediate data availability after sampling.
It supports wide-supply operation (2.35 V–5.25 V) with rail-to-rail unipolar input (0 V to VDD), digital inputs tolerant up to 5.25 V regardless of VDD level, and power-down mode drawing only 1 µA. The 15 MHz full-power bandwidth and 530 ns typical conversion time enable accurate capture of fast transients in motor control feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1,024 discrete output codes for precise quantization of analog sensor signals. |
| Max Throughput Rate | 1.25 MSPS - supports real-time sampling of 625 kHz Nyquist-limited signals (e.g., motor phase currents). |
| INL / DNL | ±0.35 LSB / ±0.35 LSB - ensures monotonicity and <0.1% gain error across full scale, critical for closed-loop stability. |
| SINAD / THD | 61 dB / –84 dB at 100 kHz - enables >9.8 ENOB for clean digitization of baseband signals in optical networking receivers. |
| Supply Range | 2.35 V to 5.25 V - allows direct interfacing with 3.3 V or 5 V system rails without level-shifting circuitry. |
| Power-Down Current | 1 µA - extends battery life in portable medical instrumentation during idle intervals. |
| Input Bandwidth | 15 MHz at –3 dB - captures harmonics of fast-switching PWM waveforms without aliasing in digital drive feedback loops. |
Pinout & Package
ADS7887SDCKT is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm body size), optimized for space-constrained PCB layouts in portable and high-density industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply and internal reference | Supplies core logic and ADC reference; output code scales linearly with VDD (0 V to VDD input range). |
| GND | Analog/digital ground reference | Common return for all analog and digital signals; must be low-impedance and decoupled with 1 µF + 10 nF capacitors. |
| VIN | Analog input | Unipolar single-ended input accepting 0 V to VDD; requires ≤200 Ω source impedance for full performance. |
| SCLK | Serial clock input | 25-MHz max clock synchronizes conversion timing and serial data output; falling edge triggers bit transfer. |
| SDO | Serial data output | 3-state CMOS output delivering 14-bit frame (MSB-first); enters high-impedance state after 16th SCLK edge. |
| CS | Chip select (active-low) | Falling edge initiates sampling and conversion; must remain low for ≥25 ns and not deassert before acquisition completes. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency conversion | Delivers first valid data immediately after sampling - eliminates pipeline delay in real-time control loops. |
| Digital input voltage tolerance | Accepts up to 5.25 V logic inputs even when VDD = 2.35 V - simplifies interface with mixed-voltage microcontrollers. |
| Wide supply range | Operates from 2.35 V to 5.25 V - supports direct connection to Li-ion battery (3.0–4.2 V) or regulated 3.3 V/5 V rails. |
| Low power consumption | 3.8 mW at 3 V / 1.25 MSPS - enables continuous high-speed sampling in thermally constrained handheld devices. |
| High input bandwidth | 15 MHz –3 dB bandwidth - preserves signal integrity for fast transient detection in bus voltage monitoring. |
Applications
| Motor Current Sensing | Optical Sensor Interface |
|---|---|
|
Use Scenario: Real-time measurement of phase currents in BLDC motor drives using shunt resistors. IC Role / Device Role / Timing Role: High-speed ADC capturing current waveforms at 1.25 MSPS with zero latency to feed FOC algorithms. Use Value: Enables precise torque control and overcurrent protection with <1 µs aperture delay and 15 MHz bandwidth. |
Use Scenario: Digitizing output from photodiode amplifiers in DWDM optical transceivers. IC Role / Device Role / Timing Role: Unipolar ADC converting low-noise analog photocurrent signals into digital data for DSP processing. Use Value: 61 dB SINAD ensures >9.8 ENOB for accurate optical power monitoring across temperature (–40°C to 125°C). |
| Battery-Powered Instrumentation | Medical Sensor Acquisition |
|
Use Scenario: Portable ECG or pulse oximeter front-end acquiring biopotential signals. IC Role / Device Role / Timing Role: Low-power 10-bit ADC sampling at sub-MSPS rates with 1 µA power-down mode between readings. Use Value: 3.8 mW active power and rail-to-rail input simplify analog front-end design while extending battery runtime. |
Use Scenario: High-fidelity acquisition of pressure or temperature sensor outputs in diagnostic equipment. IC Role / Device Role / Timing Role: Precision ADC providing monotonic 10-bit conversion with ±0.35 LSB INL for calibrated measurements. Use Value: Guaranteed no missing codes and tight linearity ensure traceable accuracy per IEC 60601 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog-to-digital conversion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7886IDCKT | 10-bit, 1.25-MSPS, but wider supply (2.35–5.25 V) and same SC70-6 package; differs in timing (no zero-latency guarantee) and higher 5.5 mW power at 3 V. | Requires external reference; lacks guaranteed zero-latency behavior - less suitable for deterministic control loops. | Select ADS7887SDCKT when zero-latency and tighter INL (±0.35 LSB vs ±0.5 LSB) are required for closed-loop stability. |
| ADS7867IDBVT | 10-bit, 1.25-MSPS, but narrower 1.2–3.6 V supply range and SOT-23-6 package; lower 2.5 mW power at 2.7 V, but only rated to 85°C. | Not qualified for automotive or extended industrial temperature (–40°C to 125°C); limited to 3.6 V max VDD. | Choose ADS7887SDCKT for designs requiring 125°C operation or 5 V system compatibility without level shifters. |
Compared with ADS7886IDCKT and ADS7867IDBVT, ADS7887SDCKT uniquely combines zero-latency operation, ±0.35 LSB INL over –40°C to 125°C, and 5.25 V digital input tolerance - making it optimal for high-reliability motor control and optical networking where timing determinism and mixed-voltage interfacing are critical.
Availability
ADS7887SDCKT is available at Aetrix Electronics and suitable for motor current sensing, optical sensor digitization, battery-powered instrumentation, medical sensor acquisition, and high-speed closed-loop systems requiring stable component supply across industrial temperature ranges.
Supply support for ADS7887SDCKT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade ICs.
The ADS7887SDCKT belongs to TI's ADS788x family of micro-power SAR ADCs, designed specifically for high-speed, low-power, and space-constrained applications in digital drives, optical networking, and portable medical devices.
FAQ
What is the maximum sample rate supported by the ADS7887SDCKT?
The ADS7887SDCKT supports a maximum throughput rate of 1.25 MSPS when driven by a 25-MHz SCLK signal. This enables sampling of signals up to 625 kHz (Nyquist limit) with full 10-bit resolution and guaranteed no missing codes. Conversion time is typically 530 ns, and acquisition time is 260 ns - both critical for maintaining timing integrity in high-speed control systems.
Does the ADS7887SDCKT require an external reference voltage?
No, the ADS7887SDCKT uses its VDD supply as the internal reference, supporting a unipolar input range of 0 V to VDD. This eliminates the need for external reference components and simplifies layout. However, VDD must be well-decoupled (1 µF + 10 nF) and low-noise to maintain specified INL and SINAD performance across temperature.
What is the operating temperature range for the ADS7887SDCKT?
The ADS7887SDCKT is fully specified for operation from –40°C to +125°C ambient temperature. This extended industrial range is validated across all electrical characteristics including INL (±0.35 LSB), SINAD (61 dB), and power consumption - making it suitable for under-hood automotive subsystems and industrial motor drives.
How does the zero-latency feature of the ADS7887SDCKT benefit real-time control systems?
Zero latency means the ADS7887SDCKT outputs valid conversion data immediately after sampling - with no pipeline delay. In real-time control like field-oriented motor control, this enables immediate feedback correction within the same control cycle, improving dynamic response and reducing phase lag versus pipelined ADCs.
Can the ADS7887SDCKT interface directly with a 5-V microcontroller while powered from a 3.3-V supply?
Yes. The ADS7887SDCKT accepts digital input voltages up to 5.25 V regardless of VDD level - so CS and SCLK from a 5-V MCU can drive the device directly when VDD = 3.3 V. Output levels (SDO) remain referenced to VDD, so a level shifter may be needed for 5-V MCU input if VDD < 4.5 V.
ADS7887SDCKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 1.25M
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 2.35V ~ 5.25V
- Voltage - Supply, Digital:
- 2.35V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- SC-70-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7887SDCKT FAQ
1.How can I place an order for ADS7887SDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7887SDCKT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADS7887SDCKT reliable?
The price and inventory of ADS7887SDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7887SDCKT is usually 5 days.
3.What payment methods are accepted for ADS7887SDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7887SDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7887SDCKT?
ADS7887SDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7887SDCKT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADS7887SDCKT?
For technical support, including ADS7887SDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7887SDCKT requirements.
6.How does Aetrix verify that ADS7887SDCKT is sourced from the original manufacturer or authorized distributors?
All ADS7887SDCKT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS7887SDCKT meets industry standards.
7.What is the process for return or replacement of ADS7887SDCKT?
All ADS7887SDCKT units undergo pre-shipment inspection (PSI). If there is an issue with ADS7887SDCKT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADS7887SDCKT part is unused and in its original packaging.
Return procedure for ADS7887SDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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