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Texas Instruments ADS7887SDBVT
- Part No.:
- ADS7887SDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
ADS7887SDBVT.pdf
- Description:
- IC ADC 10BIT SAR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:528
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Product details
Overview
ADS7887SDBVT from Texas Instruments is a 10-bit, 1.25-MSPS SAR analog-to-digital converter in a 6-pin SOT-23 package, featuring zero latency, ±0.35 LSB INL, 61 dB SINAD at 100 kHz, and unipolar 0 V to VDD input range. It operates from 2.35 V to 5.25 V and delivers 3.8 mW typical power dissipation at 3 V - ideal for high-speed battery-powered sensing in motor control and optical networking.
For engineers reviewing the ADS7887SDBVT datasheet, ADS7887SDBVT pinout, ADS7887SDBVT application, or ADS7887SDBVT equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-chain support for industrial embedded and medical instrumentation designs.
Technical Context
The ADS7887SDBVT implements a capacitor-based successive approximation register (SAR) architecture with integrated sample-and-hold, enabling true zero-latency conversion. Its serial interface uses CS-active-low sampling and 25-MHz SCLK for MSB-first 10-bit output with 4 leading + 2 trailing zeros - no external reference or clock buffer required.
It supports wide-supply operation (2.35–5.25 V) and features rail-to-rail digital inputs tolerant up to 5.25 V independent of VDD, easing level-shifting in mixed-voltage systems. Power-down mode draws only 1 µA, and acquisition time is fixed at 260 ns with 5 ns aperture delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes for precision measurement of analog sensor signals. |
| Max Throughput Rate | 1.25 MSPS - supports real-time closed-loop control in digital drives and baseband radio sampling. |
| INL / DNL | ±0.35 LSB / ±0.35 LSB - ensures monotonicity and <0.1% full-scale linearity error across temperature. |
| SINAD / THD | 61 dB / –84 dB at 100 kHz - enables accurate digitization of medium-bandwidth signals like motor current waveforms. |
| Supply Range | 2.35 V to 5.25 V - compatible with single-cell Li-ion (3.0–4.2 V), 3.3-V, and 5-V system rails without LDO. |
| Power-Down Current | 1 µA - extends battery life in portable medical instruments during idle intervals between measurements. |
| Input Bandwidth | 15 MHz (–3 dB) - supports anti-aliasing filter design for signals up to ~4.5 MHz Nyquist frequency. |
Pinout & Package
ADS7887SDBVT is housed in a 6-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for space-constrained PCB layouts in portable and industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VDD | Power supply and internal reference | Supplies core logic and ADC reference; output span = 0 V to VDD - no external reference needed. |
| 2: GND | Analog/digital ground reference | Single ground pin serves both analog input and digital I/O; requires low-impedance connection to system AGND/DGND plane. |
| 3: VIN | Analog input | Unipolar input accepts 0 V to VDD; source impedance ≤200 Ω recommended for full AC performance. |
| 4: SCLK | Serial clock input | 25-MHz max clock; falling edge drives data output and controls conversion timing - synchronous with CS. |
| 5: SDO | Serial data output | 3-state, MSB-first 10-bit word with 4 leading + 2 trailing zeros; tri-states after 16th SCLK falling edge. |
| 6: CS | Chip select (active low) | Falling edge initiates sampling and conversion; must remain low for ≥25 ns; rising edge terminates cycle. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency conversion | Eliminates pipeline delay - sampled value appears on SDO within one SCLK cycle, critical for real-time feedback loops. |
| Rail-to-rail digital input tolerance | Digital inputs accept up to 5.25 V regardless of VDD (e.g., 2.35 V), simplifying interface with 5-V microcontrollers without level shifters. |
| Integrated sample-and-hold | No external SHA required - reduces BOM count and layout area while maintaining 15 MHz input bandwidth. |
| Low-power power-down mode | 1 µA quiescent current with SCLK off enables rapid wake-up (<0.8 µs) for duty-cycled sensing applications. |
| Wide temperature range | Specified from –40°C to +125°C - suitable for under-hood automotive sensors and industrial motor drives. |
Applications
| Motor Current Sensing | Optical Network Monitoring |
|---|---|
|
Use Scenario: Real-time sampling of shunt voltage in servo drive inverters operating at 20 kHz PWM frequency. IC Role / Device Role / Timing Role: ADC front-end capturing current transients with 5 ns aperture delay and 1.25 MSPS throughput to feed FPGA-based current loop controller. Use Value: Enables precise torque ripple suppression and overcurrent protection with <1 µs total conversion-to-decision latency. |
Use Scenario: Digitizing photodiode output in DWDM channel power monitors requiring stable gain and low noise. IC Role / Device Role / Timing Role: High-fidelity analog front-end converting optical detector voltage into 10-bit digital values synchronized to system clock via CS/SCLK. Use Value: Delivers 61 dB SINAD and ±0.35 LSB INL to resolve 0.1% optical power changes across temperature. |
| Battery-Powered Medical Sensors | High-Speed Closed-Loop Systems |
|
Use Scenario: Portable ECG lead-off detection and respiration monitoring in handheld diagnostic devices. IC Role / Device Role / Timing Role: Low-power ADC acquiring biopotential signals at 1 kSPS in active mode and entering 1 µA sleep between samples. Use Value: Extends AA-battery life to >12 months while maintaining clinical-grade linearity and noise floor. |
Use Scenario: Position feedback in piezoelectric actuator control where sub-microsecond timing determinism is mandatory. IC Role / Device Role / Timing Role: Zero-latency SAR converter providing immediate digitized position signal to real-time DSP for nanosecond-critical correction. Use Value: Eliminates pipeline delay-induced phase lag, enabling 10× faster settling time in adaptive optics systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7886IDBVR | 10-bit, 1.25 MSPS, same SOT-23-6 package but wider supply (2.35–5.25 V); identical pinout and timing; ±0.5 LSB INL (vs ±0.35 LSB). | Lower AC performance (59 dB SINAD) and higher DNL (±0.5 LSB) - suitable for cost-sensitive industrial I/O, not precision medical. | Select when budget constraints outweigh need for best-in-class linearity and THD. |
| ADS8860IDRCT | 16-bit, 1 MSPS, 10-pin VSON; SPI-compatible; ±1.5 LSB INL; 2.5–5.5 V supply; 1.5 mW @ 3 V. | Higher resolution and SNR (92 dB) but lower speed and larger footprint - fits precision data loggers, not high-speed control. | Choose when resolution > speed, and board area allows 3× larger package with decoupling overhead. |
Compared with ADS7886IDBVR, ADS7887SDBVT offers tighter INL and superior dynamic performance for demanding signal fidelity; versus ADS8860IDRCT, it trades resolution for speed, size, and zero-latency behavior essential in real-time embedded control.
Availability
ADS7887SDBVT is available at Aetrix Electronics and suitable for motor current sensing, optical network monitoring, battery-powered medical sensors, and high-speed closed-loop systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for ADS7887SDBVT 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 IC design.
The ADS7887SDBVT belongs to TI's ADS788x family of miniature SAR ADCs engineered for ultra-low-power, high-speed acquisition in space- and energy-constrained applications - from portable diagnostics to optical switching subsystems.
FAQ
What is the maximum SCLK frequency supported by ADS7887SDBVT?
The ADS7887SDBVT supports up to 25 MHz SCLK across its full operating voltage range (2.35 V to 5.25 V). At this clock rate, the device achieves its rated 1.25-MSPS throughput with 530–560 ns conversion time. Exceeding 25 MHz violates timing specifications and may cause invalid data or latch-up.
Does ADS7887SDBVT require an external voltage reference?
No, ADS7887SDBVT does not require an external voltage reference. It uses VDD as its internal reference, resulting in a unipolar input range of 0 V to VDD. This eliminates external reference components and simplifies layout, though system-level accuracy depends on VDD stability and noise.
How does the power-down mode work on ADS7887SDBVT?
ADS7887SDBVT enters power-down mode when SCLK remains inactive (high or low) after CS deassertion. Supply current drops to 1 µA. Power-down exits automatically on the next CS falling edge, with 0.8 µs wake-up time and one invalid conversion before valid data resumes.
Can ADS7887SDBVT interface directly with a 5-V microcontroller while powered from 3.3 V?
Yes - ADS7887SDBVT 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 ADS7887SDBVT powered at 3.3 V without level shifters, easing mixed-voltage system integration and relaxing power-up sequencing requirements.
What is the quiet time (tq) requirement after ADS7887SDBVT SDO goes 3-state?
The quiet time (tq) is 40 ns minimum - the interval between SDO entering 3-state and the next CS falling edge. Violating tq risks incomplete acquisition or invalid conversions. This timing is independent of VDD and must be enforced in firmware or hardware timing logic to ensure reliable multi-cycle operation.
ADS7887SDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- SOT-23-6
- 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:
- SOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7887SDBVT FAQ
1.How can I place an order for ADS7887SDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7887SDBVT 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 ADS7887SDBVT reliable?
The price and inventory of ADS7887SDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7887SDBVT is usually 5 days.
3.What payment methods are accepted for ADS7887SDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7887SDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7887SDBVT?
ADS7887SDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7887SDBVT 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 ADS7887SDBVT?
For technical support, including ADS7887SDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7887SDBVT requirements.
6.How does Aetrix verify that ADS7887SDBVT is sourced from the original manufacturer or authorized distributors?
All ADS7887SDBVT 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 ADS7887SDBVT meets industry standards.
7.What is the process for return or replacement of ADS7887SDBVT?
All ADS7887SDBVT units undergo pre-shipment inspection (PSI). If there is an issue with ADS7887SDBVT, 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 ADS7887SDBVT part is unused and in its original packaging.
Return procedure for ADS7887SDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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