My Inquiry
My Account
Texas Instruments ADS1148QPWRQ1
- Part No.:
- ADS1148QPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS1148QPWRQ1.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:839
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS1148QPWRQ1 from Texas Instruments is an automotive-grade, 16-bit delta-sigma analog-to-digital converter with integrated PGA (gain 1–128 V/V), dual matched IDACs (50 µA–1.5 mA), internal 2.048-V reference, and 4.096-MHz oscillator. It supports 8-channel analog multiplexing, open-sensor detection, and system monitoring for precision temperature sensing in harsh environments.
For engineers reviewing the ADS1148QPWRQ1 datasheet, ADS1148QPWRQ1 pinout, ADS1148QPWRQ1 application, or ADS1148QPWRQ1 equivalent, this device delivers single-cycle settling at up to 2 kSPS, 50/60-Hz rejection at ≤20 SPS, and AEC-Q100 Grade 1 (–40°C to +125°C) qualification - critical for BMS, exhaust gas sensing, and RTD/thermocouple front-ends.
Technical Context
The ADS1148QPWRQ1 implements a third-order delta-sigma modulator with a programmable digital filter that settles in one conversion cycle, enabling rapid channel cycling across its fully flexible 8-input multiplexer. Its PGA uses chopper-stabilized amplifiers to achieve <15 nV/°C gain drift at G=128 and <100 nV/°C offset drift at G=1.
Integrated system monitors include internal temperature sensor (118 mV @ 25°C, 405 µV/°C), AVDD/DVDD/REF voltage supervision, and burn-out current sources (0.5/2/10 µA). Dual IDACs provide <0.2% absolute mismatch and <10 ppm/°C matching drift for precise ratiometric RTD excitation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit no-missing-codes - guarantees monotonicity and full-scale linearity for high-accuracy sensor digitization. |
| Data Rate | 5–2000 SPS with single-cycle settling - enables real-time multi-channel scanning without settling delay penalties. |
| PGA Gain Range | 1× to 128× in discrete steps - supports µV-level thermocouple signals and mV-level RTD bridges without external amplification. |
| IDAC Output | 50 µA to 1.5 mA, ±1% absolute error - ensures stable, ratiometric excitation for 2-/3-/4-wire RTDs with minimal self-heating. |
| Internal Reference | 2.048 V ±5 mV, 20–50 ppm/°C drift - provides stable scaling for measurements independent of supply rails. |
| ESD Rating | HBM ±2000 V, CDM ±750 V - meets AEC-Q100 stress requirements for automotive PCB handling and assembly. |
| Operating Temp | –40°C to +125°C ambient - qualified for under-hood and battery-pack environments without derating. |
Pinout & Package
TSSOP-28 package (9.70 mm × 4.40 mm), thermally enhanced for automotive reliability; pin-compatible with ADS1147-Q1 and ADS1248-Q1 in same footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0/IEXC to AIN7/IEXC/GPIO7 | Configurable analog input / IDAC sink / GPIO | Eight bidirectional pins supporting simultaneous analog sensing, excitation current routing, and digital I/O control - eliminates external mux and driver ICs. |
| REFP0/GPIO0, REFN0/GPIO1 | Reference input or GPIO | Dual-purpose pins allow external reference connection or expansion of digital control lines without sacrificing dedicated reference accuracy. |
| IEXC1, IEXC2 | Dual matched excitation current outputs | Independent, programmable current sources enable true 4-wire RTD measurement and differential sensor biasing. |
| VREFOUT, VREFCOM | Internal reference output and common | Provides buffered 2.048-V reference and mid-rail return - simplifies unipolar/bipolar supply configuration and decoupling. |
| SCLK, DIN, DOUT/DRDY, CS | SPI-compatible serial interface | Standard 4-wire SPI with DRDY-integrated DOUT supports daisy-chaining and interrupt-driven readout in noise-sensitive systems. |
Key Features
| Feature | Design Value |
|---|---|
| Single-cycle settling digital filter | Enables full 2-kSPS throughput with zero settling latency between channels - critical for fast thermal profiling in EV battery packs. |
| Programmable burn-out detection | Integrated 0.5/2/10 µA current sources identify open RTD or thermistor leads before conversion - prevents false fault alarms. |
| VBIAS generation | Internal (AVDD+AVSS)/2 bias voltage drives thermocouples and bridge sensors - removes need for external op-amp level-shifting circuitry. |
| System monitor suite | Simultaneous on-chip measurement of AVDD, DVDD, internal temp, and reference voltages - reduces BOM count for safety-critical diagnostics. |
| Self and system calibration | On-demand offset/gain calibration using internal references - maintains accuracy over lifetime without factory recalibration. |
Applications
| Thermocouple-Based Engine Monitoring | RTD-Based Battery Cell Sensing |
|---|---|
Use Scenario: Real-time exhaust gas temperature profiling in diesel aftertreatment systems using Type K thermocouples. IC Role / Device Role / Timing Role: Front-end ADC with VBIAS, PGA (G=32), and 50-Hz rejection filter synchronizes with engine ECU timing cycles. Use Value: Single-cycle settling enables 100+ channel scans per second across multi-probe arrays, meeting ISO 26262 ASIL-B diagnostic coverage requirements. |
Use Scenario: Precision temperature monitoring of individual Li-ion cells in 400-V traction battery modules. IC Role / Device Role / Timing Role: Ratiometric 3-wire RTD digitizer using dual IDACs and internal reference - immune to supply ripple and trace resistance. Use Value: <0.2% IDAC mismatch and <10 ppm/°C matching drift ensure <±0.1°C measurement consistency across 96-cell strings. |
| Exhaust Gas NOx Sensor Interface | Industrial Multichannel Voltage Monitoring |
Use Scenario: Signal conditioning for electrochemical NOx sensors requiring low-noise, high-impedance input and bias voltage. IC Role / Device Role / Timing Role: High-Z PGA (G=128) with burn-out detection interfaces directly to sensor electrodes; internal oscillator eliminates external crystal. Use Value: 0.49 µVPP input-referred noise at 5 SPS/G=128 resolves sub-mV sensor outputs without external filtering or shielding. |
Use Scenario: Supervisory monitoring of 12 isolated DC bus voltages in industrial motor drives with optical isolation. IC Role / Device Role / Timing Role: Multiplexed voltage scaler using internal reference and programmable PGA - replaces discrete resistor dividers and op-amps. Use Value: Integrated AVDD/DVDD monitoring and self-calibration reduce calibration labor by >70% in production test fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1248IPWR | 24-bit resolution, 2 kSPS max, no AEC-Q100 qualification, wider supply range (2.7–5.25 V analog/digital) | Targeted at industrial instrumentation, not automotive safety-critical systems | Select when higher resolution is required and automotive qualification is unnecessary. |
| ADS1147IPWR | 16-bit, 2 kSPS, identical pinout and register map, but lacks GPIOs, internal oscillator, and system monitors | Cost-optimized variant for fixed-function RTD/thermistor systems without diagnostics | Choose for legacy designs where GPIOs and self-test features are unused - lower BOM cost. |
Compared with ADS1248IPWR, ADS1148QPWRQ1 trades resolution for AEC-Q100 compliance and integrated diagnostics; compared with ADS1147IPWR, it adds GPIO flexibility, internal clock, and comprehensive system monitoring - essential for ASIL-B functional safety architectures.
Availability
ADS1148QPWRQ1 is available at Aetrix Electronics and suitable for battery management systems (BMS), exhaust gas sensing (NOx, O₂), and multichannel RTD/thermistor temperature monitoring requiring stable component supply across automotive production lifecycles.
Supply support for ADS1148QPWRQ1 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 deep expertise in precision data acquisition and automotive electronics.
The ADS1148QPWRQ1 belongs to TI's automotive-qualified precision ADC product line, engineered specifically for high-reliability sensor front-ends in electric vehicles, powertrain controls, and emissions systems.
FAQ
What is the maximum data rate with single-cycle settling on ADS1148QPWRQ1?
The ADS1148QPWRQ1 achieves true single-cycle settling at all data rates up to 2 kSPS. This means the digital filter produces a valid, settled conversion result every sample period - enabling deterministic timing for real-time channel switching without dead time or settling overhead. At 2 kSPS, each conversion completes in 500 µs, and the device can cycle through all 8 analog inputs in 4 ms with full accuracy.
Does ADS1148QPWRQ1 require an external crystal oscillator?
No, ADS1148QPWRQ1 includes a fully integrated 4.096-MHz oscillator with ±5% tolerance over temperature, eliminating the need for an external crystal or clock source. The CLK pin may be tied to DGND to activate the internal oscillator - simplifying layout and reducing BOM count. An external clock (1–4.5 MHz) is optional and only required if tighter frequency stability is needed beyond the internal oscillator's specification.
How does the burn-out detection feature work on ADS1148QPWRQ1?
The ADS1148QPWRQ1 integrates two programmable burn-out current sources (0.5 µA, 2 µA, or 10 µA) that can be routed to any AINx pin via the multiplexer. When enabled, these currents force a measurable voltage across an open sensor - triggering a known out-of-range condition detectable in software. This allows automatic identification of broken RTD wires or disconnected thermistors before initiating conversion, improving system robustness in automotive applications.
Can ADS1148QPWRQ1 measure its own supply voltages?
Yes, ADS1148QPWRQ1 includes a built-in system monitor that allows direct measurement of AVDD, DVDD, internal reference (VREFOUT), and internal temperature via the analog multiplexer. These signals are selectable as AINP/AINN inputs using dedicated MUX settings - enabling real-time health monitoring and diagnostics without external components. This capability supports ISO 26262 functional safety requirements for voltage supervision in ASIL-B systems.
What is the purpose of the VBIAS pin on ADS1148QPWRQ1?
The VBIAS terminal on ADS1148QPWRQ1 outputs a stable (AVDD + AVSS)/2 voltage - typically 2.5 V in unipolar mode or 0 V in bipolar mode - used to bias thermocouple cold junctions or bridge sensor midpoints. It eliminates the need for external op-amp circuits to generate mid-supply references, reducing component count and PCB area. VBIAS is internally buffered and has 400-Ω output impedance, supporting direct connection to high-impedance sensor nodes.
ADS1148QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 2k
- Number of Inputs:
- 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- PGA, Temperature Sensor
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 28-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
ADS1148QPWRQ1 FAQ
1.How can I place an order for ADS1148QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1148QPWRQ1 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 ADS1148QPWRQ1 reliable?
The price and inventory of ADS1148QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1148QPWRQ1 is usually 5 days.
3.What payment methods are accepted for ADS1148QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1148QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1148QPWRQ1?
ADS1148QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1148QPWRQ1 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 ADS1148QPWRQ1?
For technical support, including ADS1148QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1148QPWRQ1 requirements.
6.How does Aetrix verify that ADS1148QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS1148QPWRQ1 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 ADS1148QPWRQ1 meets industry standards.
7.What is the process for return or replacement of ADS1148QPWRQ1?
All ADS1148QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1148QPWRQ1, 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 ADS1148QPWRQ1 part is unused and in its original packaging.
Return procedure for ADS1148QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS1148QPWRQ1 Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
