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Texas Instruments ADS7882IPFBT
- Part No.:
- ADS7882IPFBT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TQFP
- Datasheet:
-
ADS7882IPFBT.pdf
- Description:
- IC ADC 12BIT SAR 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,445
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Product details
Overview
ADS7882IPFBT from Texas Instruments is a 12-bit, 3-MSPS successive approximation register (SAR) analog-to-digital converter with pseudo-differential unipolar input (0 V to 2.5 V), integrated 2.5-V reference, and high-speed 12-bit parallel interface. It delivers 69.5 dB SNR at 100 kHz input and supports byte-mode operation for 8-bit microprocessor interfacing in optical networking and ultrasound detection systems.
For engineers reviewing the ADS7882IPFBT datasheet, ADS7882IPFBT pinout, ADS7882IPFBT application, or ADS7882IPFBT equivalent, this page provides verified technical context, real-world timing behavior, validated package mapping, confirmed power modes (Nap/Power Down), and cross-referenced alternatives for high-speed data acquisition design.
Technical Context
The ADS7882IPFBT implements a capacitor-based SAR architecture with inherent sample-and-hold, enabling zero-latency conversion and back-to-back operation at up to 3 MSPS. Its pseudo-differential input accepts –IN within ±200 mV to suppress ground mismatch and common-mode noise while maintaining unipolar 0 V–2.5 V full-scale range on +IN.
Timing is controlled via asynchronous CONVST and CS signals, with BUSY indicating active conversion. The device supports three read modes: full 12-bit parallel (BYTE = 0), folded 8-bit byte mode (BYTE = 1), and 3-state bus control via RD/CS, all compliant with CMOS logic levels at +VBD = 3.3 V or 5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR with no missing codes guaranteed at 10-bit level; enables precise amplitude quantization in spectrum analyzers. |
| Sample Rate | 3 MSPS maximum throughput; supports real-time digitization of 50 MHz small-signal bandwidth inputs. |
| SNR | 69.5 dB at 100 kHz input frequency; ensures >11.5 effective bits for high-fidelity signal capture. |
| Power Dissipation | 85 mW at 3 MSPS (5 V supplies); reduces thermal load in dense PCB layouts for telecom modules. |
| Nap Mode Power | 10 mW typical; cuts power by ~88% during low-duty-cycle acquisition without sacrificing wake-up latency. |
| Power Down Current | 10 µW max; enables ultra-low quiescent current for battery-backed instrumentation sleep states. |
| Integral Linearity | ±4 LSB at 12-bit resolution; maintains accuracy across full scale for closed-loop control feedback paths. |
Pinout & Package
ADS7882IPFBT is housed in a 48-pin TQFP package (PFB) with exposed thermal pad, optimized for analog-digital partitioning: AGND/+VA pins dominate the analog side (pins 4–5, 8–15, 43–46), BDGND/+VBD occupy digital corners (pins 24–25, 34–35), and REFM (pins 47–48) anchors reference ground integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST (40) | Asynchronous conversion trigger | Falling edge initiates conversion; rising edge starts acquisition-enables precise timing control in jitter-sensitive systems. |
| CS (42) | Chip select / acquisition enable | Low level enables internal logic; falling edge with CONVST low starts sampling-supports flexible multi-device bus sharing. |
| RD (41) | Read strobe / output enable | Active-low signal releases latched conversion result onto DB[0:11] bus; synchronizes data capture with host processor clock. |
| BYTE (39) | Bus format selector | High configures 8-bit folded output (D3→D11), enabling direct connection to 8-bit microcontrollers without external demultiplexing. |
| PWD/RST (38) | Power-down/reset control | Low pulse ≥7.2 µs enters power-down; ≥45 ns resets logic-provides hardware-controlled state management without firmware overhead. |
| +IN (6), –IN (7) | Pseudo-differential analog inputs | +IN accepts 0–2.5 V; –IN limited to ±0.2 V-rejects ground bounce between sensor and ADC while preserving unipolar range. |
| REFIN (1), REFOUT (2) | Reference input/output | Internal 2.5 V reference enabled by shorting REFOUT to REFIN; external reference supported via REFIN only-flexible precision sourcing. |
| A_PWD (37) | Nap mode enable | Active-low entry into reduced-power Nap state after conversion completes-lowers average power in burst-mode acquisition. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency architecture | Enables immediate back-to-back conversions without BUSY polling-critical for real-time closed-loop control response. |
| Byte-mode parallel interface | Eliminates need for external byte multiplexers when interfacing with 8-bit MCUs-reduces BOM count and layout complexity. |
| Integrated 2.5-V reference with buffer | Removes external reference IC and decoupling network-saves board space and improves PSRR in noisy power environments. |
| ±200-mV –IN common-mode swing | Compensates for ground potential differences between remote sensors and ADC-enhances measurement robustness in distributed systems. |
| Nap mode (10 mW) | Reduces dynamic power by >85% during idle intervals while retaining fast wake-up (<60 ns acquisition extension)-ideal for duty-cycled DAQ. |
Applications
| Optical Networking (DWDM) | Spectrum Analyzers |
|---|---|
Use Scenario: Real-time monitoring of wavelength channel power in dense wavelength division multiplexing transceivers. IC Role / Device Role / Timing Role: High-speed digitization of photodiode current outputs with sub-100-ns aperture jitter to preserve spectral fidelity. Use Value: 3-MSPS sampling captures transient power surges before automatic gain control loops respond, preventing laser damage. |
Use Scenario: Baseband digitization of IF signals in handheld RF spectrum analyzers operating up to 50 MHz bandwidth. IC Role / Device Role / Timing Role: 12-bit SAR ADC with 69.5 dB SNR and 80.5 dB SFDR serving as front-end digitizer for FFT processing. Use Value: Internal reference stability (25 ppm/°C drift) ensures amplitude accuracy across temperature without calibration routines. |
| Ultrasound Detection | High-Speed Closed-Loop Systems |
Use Scenario: Echo signal digitization in portable ultrasound probes requiring low power and compact form factor. IC Role / Device Role / Timing Role: Pseudo-differential input rejects common-mode noise from piezoelectric transducer crosstalk and EMI. Use Value: Byte-mode interface directly connects to ARM Cortex-M0+ MCU GPIOs-eliminates FPGA glue logic and reduces system latency. |
Use Scenario: Position feedback sampling in servo motor drives where loop update rates exceed 1 MSPS. IC Role / Device Role / Timing Role: Zero-latency conversion enables deterministic sampling aligned to PWM edges for current ripple suppression. Use Value: Nap mode activation between PWM cycles cuts average power by 8× versus continuous operation-extends thermal margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7883IPFBT | 10-bit resolution, same 3-MSPS rate, identical pinout and interface; lower SNR (65 dB) and INL (±2 LSB). | Better suited for cost-sensitive industrial I/O where 10-bit accuracy suffices and board space is constrained. | Select when resolution requirement is ≤10 bits and system SNR budget allows 4.5 dB degradation. |
| ADS8320EB | 16-bit resolution, 1-MSPS max, SPI interface only, no internal reference; requires external REF and level-shifting for 3.3-V hosts. | Targets precision measurement (e.g., portable DMMs) where throughput is secondary to DC accuracy and noise floor. | Choose when 16-bit DC linearity and <1 LSB INL outweigh need for parallel interface and on-chip reference. |
Compared with ADS7882IPFBT, ADS7883IPFBT trades resolution for lower cost and power in volume applications, while ADS8320EB sacrifices speed and integration for higher precision and serial simplicity-neither offers pin compatibility or identical feature set.
Availability
ADS7882IPFBT is available at Aetrix Electronics and suitable for optical networking, spectrum analysis, ultrasound detection, and high-speed closed-loop control systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADS7882IPFBT 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 over 50 years of innovation in precision data converters and signal chain solutions.
The ADS7882IPFBT belongs to TI's high-speed SAR ADC product line, designed specifically for applications demanding 3-MSPS throughput, low-latency deterministic sampling, and integrated reference stability in space-constrained, thermally sensitive environments.
FAQ
What is the maximum sample rate of the ADS7882IPFBT?
The ADS7882IPFBT achieves a maximum throughput rate of 3 MSPS under specified conditions (+VA = 5 V, +VBD = 5 V or 3.3 V, Vref = 2.5 V). This is enabled by a 280-ns conversion time and 53-ns acquisition time, allowing back-to-back operation without BUSY polling. The ADS7882IPFBT maintains this rate across its full operating temperature range of –40°C to +85°C.
Does the ADS7882IPFBT require an external reference voltage?
No, the ADS7882IPFBT includes an integrated 2.5-V internal reference with ±25 ppm/°C drift and buffered REFOUT. When using the internal reference, REFOUT must be shorted to REFIN with a 0.1-µF bypass capacitor and a 1-µF storage capacitor to REFM. External references are supported via REFIN only, but the ADS7882IPFBT does not require them for standard operation.
How does the BYTE pin affect data output on the ADS7882IPFBT?
When BYTE = 0, the ADS7882IPFBT outputs full 12-bit data on DB[0:11] (D0–D11). When BYTE = 1, it folds the lower nibble: D3 appears on DB11, D2 on DB10, D1 on DB9, D0 on DB8, and DB[7:0] drive low-enabling direct 8-bit microcontroller interface without external logic. This dual-mode capability is unique to the ADS7882IPFBT within its family.
What power-saving modes does the ADS7882IPFBT support?
The ADS7882IPFBT supports two distinct low-power states: Nap mode (10 mW, entered via A_PWD low) and Power Down mode (10 µW, entered via PWD/RST low ≥7.2 µs). Nap mode retains configuration and enables fast wake-up (<60 ns extended acquisition), while Power Down resets logic and requires four invalid conversions on wake-up. Both are hardware-controlled and require no firmware intervention.
Is the ADS7882IPFBT pin-compatible with other devices in the ADS788x family?
Yes, the ADS7882IPFBT shares the same 48-pin TQFP (PFB) package and pinout with ADS7883IPFBT (10-bit) and ADS7884IPFBT (8-bit), enabling drop-in resolution upgrades on existing PCBs. All three support identical CONVST/CS/RD timing, BYTE-mode operation, and Nap/Power Down controls-making the ADS7882IPFBT a direct performance upgrade path without layout changes.
ADS7882IPFBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 3M
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-TQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7882IPFBT FAQ
1.How can I place an order for ADS7882IPFBT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7882IPFBT 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 ADS7882IPFBT reliable?
The price and inventory of ADS7882IPFBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7882IPFBT is usually 5 days.
3.What payment methods are accepted for ADS7882IPFBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7882IPFBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7882IPFBT?
ADS7882IPFBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7882IPFBT 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 ADS7882IPFBT?
For technical support, including ADS7882IPFBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7882IPFBT requirements.
6.How does Aetrix verify that ADS7882IPFBT is sourced from the original manufacturer or authorized distributors?
All ADS7882IPFBT 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 ADS7882IPFBT meets industry standards.
7.What is the process for return or replacement of ADS7882IPFBT?
All ADS7882IPFBT units undergo pre-shipment inspection (PSI). If there is an issue with ADS7882IPFBT, 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 ADS7882IPFBT part is unused and in its original packaging.
Return procedure for ADS7882IPFBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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