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Texas Instruments ADS8371IPFBRG4
- Part No.:
- ADS8371IPFBRG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TQFP
- Datasheet:
-
ADS8371IPFBRG4.pdf
- Description:
- IC ADC 16BIT SAR 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,367
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Product details
Overview
ADS8371IPFBRG4 from Texas Instruments is a 16-bit, 750-kSPS successive approximation register (SAR) analog-to-digital converter with integrated sample-and-hold, onboard reference buffer, and flexible 8-/16-bit parallel interface. It delivers ±1.5 LSB max INL, 88 dB SNR, 110 dB SFDR, and operates from 2.7 V to 5.25 V buffer supply over −40°C to +85°C - used in high-accuracy medical instrumentation and optical networking data acquisition.
For engineers reviewing the ADS8371IPFBRG4 datasheet, ADS8371IPFBRG4 pinout, ADS8371IPFBRG4 application, or ADS8371IPFBRG4 equivalent, key selection considerations include unipolar 0–4.096 V input range, 1.13 µs conversion time, CMOS-compatible digital interface timing, and TQFP-48 package compatibility with ADS8381/ADS8383.
Technical Context
The ADS8371IPFBRG4 implements a capacitor-based SAR architecture with inherent sampling and hold, eliminating need for external sample-and-hold circuitry. Its internal conversion clock enables fixed 750-kSPS throughput without external timing source.
It supports dual-mode parallel output: full 16-bit bus access or 8-bit byte-read mode via BYTE control, with BUSY-driven status signaling and CS/RD-controlled read synchronization. Input stage accepts differential analog signals with −IN limited to −0.2 V to +0.2 V and +IN spanning −0.2 V to VREF + 0.2 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - provides 65,536 discrete output codes for high-fidelity signal digitization |
| Sample Rate | 750 kSPS - enables real-time capture of bandwidths up to 3 MHz (−3 dB small-signal BW) |
| INL (max) | ±1.5 LSB - ensures monotonicity and <0.0023% full-scale linearity error across temperature |
| SNR | 88 dB - supports >14.3 effective number of bits (ENOB) at DC–100 kHz input |
| Supply Voltage (VBD) | 2.7 V to 5.25 V - allows direct interfacing with 3.3 V or 5 V microcontrollers and FPGAs |
| Reference Input Range | 2.5 V to 4.2 V - accommodates precision references like REF3040 (4.096 V) or REF3020 (2.048 V) |
| Power Dissipation | 130 mW at 750 kSPS - enables thermally constrained industrial and portable instrumentation designs |
Pinout & Package
ADS8371IPFBRG4 is housed in a 48-pin TQFP (PFB) package with exposed thermal pad, rated for −40°C to +85°C industrial operation. Pin assignments follow TI's standard PFB top-view layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN / −IN | Differential analog input | +IN accepts 0–4.096 V unipolar; −IN serves as common-mode reference (−0.2 V to +0.2 V), enabling rejection of shared noise |
| REFIN / REFM | Reference voltage input / return | REFIN accepts 2.5–4.2 V external reference; REFM is dedicated low-noise ground return, requiring separate AGND routing |
| CONVST | Convert start trigger | Falling-edge initiates acquisition-to-hold transition; minimum pulse width 40 ns; jitter ≤10 ps ensures timing stability |
| BUSY | Status output | Active-high open-drain signal indicates conversion in progress; duration = 1.13 µs, usable as interrupt to host controller |
| CS / RD / BYTE | Control interface inputs | CS enables acquisition; RD latches data onto DB[15:0]; BYTE selects 8-bit (folded) or 16-bit bus mode - all CMOS-level compatible |
| DB[15:0] | Parallel data outputs | Three-state CMOS outputs deliver straight binary code; 16-bit format default; BYTE=1 enables 8-bit sequential reads of MSB/LSB bytes |
| +VA / +VBD / AGND / BDGND | Power and ground terminals | +VA (5 V analog) and +VBD (2.7–5.25 V digital buffer) require independent decoupling; AGND/BGDGND separation preserves dynamic performance |
Key Features
| Feature | Design Value |
|---|---|
| Onboard reference buffer | Eliminates need for external op-amp buffer; supports direct connection of low-current references (e.g., REF3040) with only 0.1 µF decoupling |
| Flexible 8-/16-bit interface | Reduces host bus width requirements: 8-bit microcontrollers access full 16-bit result in two cycles using BYTE control and RD strobe |
| Low aperture jitter (15 ps) | Enables high SFDR (110 dB) and SNR (88 dB) at 100 kHz input - critical for magnetometer and transducer signal fidelity |
| No missing codes | Guaranteed monotonic transfer function across full 16-bit range, essential for closed-loop control and calibration systems |
| Direct pin compatibility | Swappable with ADS8381 and ADS8383 in same TQFP-48 footprint - simplifies design reuse and migration paths |
Applications
| Medical Instrumentation | Optical Networking |
|---|---|
Use Scenario: High-resolution ECG and EEG front-end digitization requiring low noise and excellent DC accuracy. IC Role / Device Role / Timing Role: Primary ADC capturing conditioned biopotential signals at ≥1 kSPS with <1 µV offset drift. Use Value: 88 dB SNR and ±1.5 LSB INL ensure detection of microvolt-level cardiac waveforms without post-processing correction. |
Use Scenario: Monitoring laser diode bias current and photodiode feedback in DWDM transceivers. IC Role / Device Role / Timing Role: Precision current-to-digital conversion for real-time power control loop closure. Use Value: 110 dB SFDR suppresses harmonic distortion from switching regulators, preserving signal integrity in dense optical modules. |
| Transducer Interface | High-Accuracy DAQ |
Use Scenario: Digitizing outputs from strain gauges, RTDs, and piezoelectric sensors in industrial test equipment. IC Role / Device Role / Timing Role: Low-drift, high-linearity ADC interfaced to instrumentation amplifiers with matched source impedances. Use Value: Very low offset drift (<0.5 µV/°C) and gain error (±0.15% FS) minimize calibration frequency in field-deployed sensors. |
Use Scenario: Modular data acquisition systems requiring 16-bit resolution, 750 kSPS aggregate throughput, and multi-channel synchronization. IC Role / Device Role / Timing Role: Standalone channel ADC with BUSY-driven interrupt and parallel read for deterministic latency. Use Value: 1.13 µs conversion time and 20 ns data-enable delay enable tight timing budgets in synchronized multi-ADC architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8381IPFB | Same 16-bit SAR architecture, identical pinout and timing; higher max INL (±2.5 LSB) and lower SNR (87 dB) | Suitable where cost sensitivity outweighs need for best-in-class linearity; retains same PCB layout and firmware interface | Select when system-level linearity budget allows ±2.5 LSB INL and 87 dB SNR - no hardware changes required |
| ADS8364IPFBR | 6-channel simultaneous-sampling variant; 16-bit, 500 kSPS per channel; different pinout and control protocol (no BYTE pin) | Required for multi-phase motor control or vibration analysis where phase coherence across channels is mandatory | Choose only when simultaneous sampling across ≥2 analog inputs is required - new layout and driver software needed |
Compared with ADS8381IPFB, ADS8371IPFBRG4 offers tighter linearity and higher SNR at same speed; versus ADS8364IPFBR, it provides single-channel optimization with simpler interface and lower power, but lacks multi-channel sync capability.
Availability
ADS8371IPFBRG4 is available at Aetrix Electronics and suitable for medical instrumentation, optical networking, and high-accuracy data acquisition systems requiring stable component supply, long-term manufacturability, and industrial temperature support.
Supply support for ADS8371IPFBRG4 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The ADS8371IPFBRG4 belongs to TI's precision high-speed SAR ADC product line, engineered for applications demanding 16-bit resolution, sub-2 µs conversion, and robust DC/AC performance without external clocks or sample-and-hold circuits.
FAQ
What is the maximum recommended reference voltage for ADS8371IPFBRG4?
The ADS8371IPFBRG4 supports an external reference voltage range of 2.5 V to 4.2 V at the REFIN pin. The typical operating point is 4.096 V (e.g., using REF3040), which aligns with its 0–4.096 V unipolar input span. Exceeding 4.2 V risks violating absolute maximum ratings and degrading INL performance.
Does ADS8371IPFBRG4 require an external conversion clock?
No, ADS8371IPFBRG4 does not require an external conversion clock. It uses an internally generated clock that sustains a fixed 750-kSPS throughput. The only required digital control signals are CONVST (to initiate conversion), BUSY (to monitor status), and CS/RD/BYTE (for data readout).
How is the 8-bit interface mode enabled on ADS8371IPFBRG4?
The 8-bit interface mode on ADS8371IPFBRG4 is enabled by driving the BYTE pin high. When BYTE = 1, the 16-bit result is delivered in two consecutive 8-bit reads: first RD cycle outputs DB[7:0] (LSB byte), second outputs DB[15:8] (MSB byte), with DB[15:8] appearing on DB[7:0] pins during the second cycle.
What is the purpose of separate AGND and BDGND pins on ADS8371IPFBRG4?
ADS8371IPFBRG4 features separate analog ground (AGND) and digital buffer ground (BDGND) pins to isolate noise-sensitive analog circuitry from digital switching transients. AGND connects to the analog signal chain and reference ground; BDGND returns digital I/O current from the +VBD supply - mixing them degrades SNR and SFDR.
Can ADS8371IPFBRG4 interface directly with a 3.3 V microcontroller?
Yes, ADS8371IPFBRG4 can interface directly with a 3.3 V microcontroller: its +VBD supply accepts 2.7–5.25 V, and all digital I/O (CS, RD, BYTE, DB[15:0], BUSY) are CMOS-compatible with 3.3 V logic levels. Ensure BDGND is tied to the microcontroller's digital ground and +VBD is supplied from the same 3.3 V rail.
ADS8371IPFBRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 48-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 750k
- Number of Inputs:
- 1
- Input Type:
- 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
- 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:
- -
ADS8371IPFBRG4 FAQ
1.How can I place an order for ADS8371IPFBRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8371IPFBRG4 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 ADS8371IPFBRG4 reliable?
The price and inventory of ADS8371IPFBRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8371IPFBRG4 is usually 5 days.
3.What payment methods are accepted for ADS8371IPFBRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8371IPFBRG4 transactions.
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4.How is shipping managed for ADS8371IPFBRG4?
ADS8371IPFBRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8371IPFBRG4 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 ADS8371IPFBRG4?
For technical support, including ADS8371IPFBRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8371IPFBRG4 requirements.
6.How does Aetrix verify that ADS8371IPFBRG4 is sourced from the original manufacturer or authorized distributors?
All ADS8371IPFBRG4 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 ADS8371IPFBRG4 meets industry standards.
7.What is the process for return or replacement of ADS8371IPFBRG4?
All ADS8371IPFBRG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS8371IPFBRG4, 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 ADS8371IPFBRG4 part is unused and in its original packaging.
Return procedure for ADS8371IPFBRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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