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Texas Instruments ADS7841EIDBQRQ1
- Part No.:
- ADS7841EIDBQRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADS7841EIDBQRQ1.pdf
- Description:
- IC ADC 12BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,646
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Product details
Overview
ADS7841EIDBQRQ1 from Texas Instruments is a 12-bit, 4-channel automotive-grade SAR analog-to-digital converter with integrated multiplexer and serial interface. It supports single-ended or differential input configurations, delivers up to 200-kHz throughput at 5 V, achieves ±2 LSB INL/DNL, and operates from 2.7 V to 5 V supply - ideal for battery-powered vehicle sensor monitoring systems.
For engineers reviewing the ADS7841EIDBQRQ1 datasheet, ADS7841EIDBQRQ1 pinout, ADS7841EIDBQRQ1 application, or ADS7841EIDBQRQ1 equivalent, key selection criteria include its AEC-Q100 qualification, programmable 8/12-bit resolution, on-chip multiplexer channel control via serial command, and low-power shutdown mode (<15 µW).
Technical Context
The ADS7841EIDBQRQ1 implements a capacitive redistribution SAR architecture with built-in sample-and-hold, enabling precise conversion without external hold circuitry. Its analog front-end includes a 4-channel multiplexer configurable for single-ended (CHx-to-COM) or differential (CHx–CHy) inputs, controlled by three address bits (A2–A0) and SGL/DIF in the serial control byte.
Digital operation relies on synchronous serial communication: CS initiates transfer, DCLK clocks 8-bit control bytes and 12-bit results, BUSY indicates conversion status, and MODE pin selects fixed 12-bit or software-controlled 8/12-bit resolution. Power management includes auto power-down (PD1/PD0 = 00b) and hardware shutdown (SHDN low).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | Programmable 8-bit or 12-bit - enables trade-off between speed (up to 200 kHz) and precision (12-bit = 1.22 mV LSB at 5 V VREF) |
| Input Channels | 4 analog inputs (CH0–CH3) with COM reference - supports 4 single-ended or 2 differential measurements per conversion cycle |
| INL / DNL | ±2 LSB max integral linearity, ±0.8 LSB max differential linearity - ensures monotonicity and <0.05% full-scale error over temperature |
| Reference Range | VREF = 0.1 V to VCC - sets input range from 0 V to VREF in single-ended mode; allows flexible scaling for low-voltage sensors |
| Power Consumption | 2 mW typical at 200 kHz / 5 V; <15 µW in shutdown - extends battery life in always-on automotive subsystems |
| Operating Temperature | –40°C to +85°C - qualified per AEC-Q100 Grade 3 for under-hood and cabin electronics |
| SINAD | 71 dB typical at 10 kHz - supports accurate digitization of audio-band and motor control feedback signals |
Pinout & Package
ADS7841EIDBQRQ1 is housed in a 16-pin SSOP package (DBQ), with exposed pad for thermal performance. Pin numbering follows standard top-view orientation (pin 1 at top-left corner, counterclockwise).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (pins 1, 9) | Power supply | Dual-supply pins enable stable biasing; supports 2.7–5.25 V operation with internal regulation |
| CH0–CH3 (pins 2–5) | Analog input channels | Four independent high-impedance inputs; selected via A2–A0 bits for multiplexed sampling |
| COM (pin 6) | Common-mode reference | Sets zero-code voltage in single-ended mode; may be grounded or biased to shift input range |
| SHDN (pin 7) | Hardware shutdown control | Active-low signal reduces supply current to <15 µW; no sequencing required for wake-up |
| VREF (pin 8) | External reference input | Unbuffered, high-impedance node; determines full-scale range and LSB weight (e.g., 0.61 mV at 2.5 V) |
| GND (pin 10) | Analog/digital ground | Single ground plane recommended; separates reference and digital return paths in layout |
| MODE (pin 11) | Resolution select override | When low, forces 12-bit conversion regardless of MODE bit in control byte |
| DOUT (pin 12) | Serial data output | 3-state output synchronized to DCLK falling edge; high-impedance when CS is high |
| BUSY (pin 13) | Conversion status indicator | Active-high open-drain output; asserts during acquisition/conversion, deasserts before data ready |
| DIN (pin 14) | Serial data input | Latches control byte on DCLK rising edge; accepts start bit (S), A2–A0, MODE, SGL/DIF, PD1/PD0 |
| CS (pin 15) | Chip select | Active-low enables serial register and initiates conversion timing; controls DOUT/BUSY output enable |
| DCLK (pin 16) | Serial clock input | Drives internal SAR logic and serial I/O; minimum pulse width 150 ns (5 V), 200 ns (2.7 V) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive applications (Grade 3: –40°C to +85°C), with production test coverage per TI automotive standards |
| Integrated 4-channel multiplexer | Reduces external component count and PCB area; eliminates need for discrete analog switches in multi-sensor systems |
| Programmable resolution (8/12-bit) | Enables 2× faster throughput in 8-bit mode (e.g., 400 kHz at 5 V) while maintaining compatibility with existing 12-bit firmware |
| Low-noise analog core | 71 dB SINAD and 120 dB channel-to-channel isolation support simultaneous measurement of sensitive signals (e.g., thermocouples, strain gauges) |
| Flexible reference interface | VREF accepts 0.1 V–VCC range; permits direct connection to low-dropout references or ratiometric sensor outputs |
| Auto power-down mode | PD1/PD0 = 00b cuts quiescent current between conversions; maintains instant wake-up with no latency or calibration overhead |
Applications
| Automotive Cabin Climate Control | Electric Power Steering (EPS) Feedback Sensing |
|---|---|
Use Scenario: Digitizing temperature, humidity, and pressure sensor outputs across multiple zones in real time. IC Role / Device Role / Timing Role: 4-channel SAR ADC with multiplexer scans NTC thermistors and capacitive humidity sensors at 125 kHz, synchronizing with HVAC microcontroller polling intervals. Use Value: Single-device solution replaces discrete ADC + MUX, reducing BOM cost by $0.32 and board space by 28 mm² while meeting ASIL-B functional safety requirements. |
Use Scenario: Sampling torque sensor bridge outputs and motor phase currents in EPS ECU for closed-loop motor control. IC Role / Device Role / Timing Role: Differential-input ADC measures CH0–CH1 and CH2–CH3 pairs simultaneously, rejecting common-mode noise from high-current motor drivers. Use Value: 120 dB channel isolation prevents cross-talk between torque and current signals, improving steering angle accuracy to ±0.1° over lifetime. |
| Onboard Battery Management System (BMS) | Advanced Driver Assistance Systems (ADAS) Camera Power Monitoring |
Use Scenario: Monitoring cell voltages and pack temperature gradients in 12S Li-ion battery packs for EVs. IC Role / Device Role / Timing Role: Configured in single-ended mode with COM tied to battery ground, digitizes up to 4 cell taps per cycle with 12-bit resolution. Use Value: ±2 LSB INL ensures voltage measurement accuracy within ±5 mV, enabling precise state-of-charge estimation and cell balancing decisions. |
Use Scenario: Measuring rail voltages and current sense signals for image sensor and ISP power domains in surround-view camera modules. IC Role / Device Role / Timing Role: Uses SHDN pin to enter ultra-low-power mode between frame sync pulses, consuming <15 µW during idle periods. Use Value: Reduces average system power by 1.8 mW per camera, extending thermal headroom for sustained 4K video capture in compact enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7841ESQDBQRQ1 | Same architecture and pinout; extended temperature range (–40°C to +125°C) and higher-grade AEC-Q100 qualification | Required for engine bay or powertrain applications where ambient exceeds 85°C | Select ADS7841ESQDBQRQ1 when operating above 85°C ambient; otherwise ADS7841EIDBQRQ1 provides identical performance at lower cost |
| MAX1247EEE+ | Pin-compatible 12-bit SAR ADC; same 4-channel mux, serial interface, and 200-kHz rate but lacks AEC-Q100 qualification and automotive temp range | Restricted to industrial or consumer designs; not suitable for automotive production | Use MAX1247EEE+ only for prototyping or non-automotive applications; ADS7841EIDBQRQ1 is mandatory for automotive OEM programs |
Compared with ADS7841ESQDBQRQ1, the ADS7841EIDBQRQ1 offers identical electrical performance and pinout but is rated for lower maximum ambient temperature (85°C vs 125°C); compared with MAX1247EEE+, it adds AEC-Q100 qualification and automotive-grade reliability testing, making it the sole compliant choice for Tier 1 automotive designs.
Availability
ADS7841EIDBQRQ1 is available at Aetrix Electronics and suitable for automotive cabin electronics, electric power steering systems, and onboard battery monitoring requiring stable component supply across long production lifecycles.
Supply support for ADS7841EIDBQRQ1 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 automotive IC design expertise and ISO/TS 16949-certified manufacturing.
The ADS7841-Q1 product line delivers AEC-Q100-qualified data converters optimized for harsh automotive environments, emphasizing low power, high accuracy, and robust serial interfacing for sensor signal conditioning in safety-critical systems.
FAQ
What is the operating temperature range for the ADS7841EIDBQRQ1?
The ADS7841EIDBQRQ1 is specified for operation from –40°C to +85°C and is qualified per AEC-Q100 Grade 3. This makes it suitable for cabin, infotainment, and body-control applications where ambient temperatures remain below 85°C. For under-hood use above 85°C, the ADS7841ESQDBQRQ1 variant is required.
Does the ADS7841EIDBQRQ1 support both single-ended and differential input modes?
Yes, the ADS7841EIDBQRQ1 supports both configurations via the SGL/DIF bit in the serial control byte. In single-ended mode (SGL/DIF = high), each channel (CH0–CH3) is measured relative to the COM pin. In differential mode (SGL/DIF = low), two channels form a differential pair (e.g., CH0–CH1), providing common-mode noise rejection and improved SNR.
How does the MODE pin affect resolution selection in the ADS7841EIDBQRQ1?
The MODE pin on the ADS7841EIDBQRQ1 acts as a hardware override: when low, it forces all conversions to 12-bit resolution regardless of the MODE bit in the control byte. When high, the MODE bit determines resolution - low for 12-bit, high for 8-bit - enabling dynamic throughput adjustment without changing pin states.
What is the minimum VREF voltage supported by the ADS7841EIDBQRQ1?
The ADS7841EIDBQRQ1 accepts VREF from 0.1 V to VCC. At 0.1 V, the LSB size is 24 μV, which falls below the device's intrinsic noise floor (30 μVrms), resulting in code dithering. For stable 12-bit operation, TI recommends VREF ≥ 0.5 V (LSB ≤ 122 μV) with proper layout and low-noise reference design.
Can the ADS7841EIDBQRQ1 be used without an external clock source?
No, the ADS7841EIDBQRQ1 requires an external DCLK signal for both serial communication and internal SAR conversion timing. The DCLK frequency directly determines throughput: at 3.2 MHz, the device achieves 200 kHz conversion rate (16 cycles per conversion). No internal oscillator or clock generation circuitry is included.
ADS7841EIDBQRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V, 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
ADS7841EIDBQRQ1 FAQ
1.How can I place an order for ADS7841EIDBQRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7841EIDBQRQ1 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 ADS7841EIDBQRQ1 reliable?
The price and inventory of ADS7841EIDBQRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7841EIDBQRQ1 is usually 5 days.
3.What payment methods are accepted for ADS7841EIDBQRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7841EIDBQRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7841EIDBQRQ1?
ADS7841EIDBQRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7841EIDBQRQ1 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 ADS7841EIDBQRQ1?
For technical support, including ADS7841EIDBQRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7841EIDBQRQ1 requirements.
6.How does Aetrix verify that ADS7841EIDBQRQ1 is sourced from the original manufacturer or authorized distributors?
All ADS7841EIDBQRQ1 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 ADS7841EIDBQRQ1 meets industry standards.
7.What is the process for return or replacement of ADS7841EIDBQRQ1?
All ADS7841EIDBQRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7841EIDBQRQ1, 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 ADS7841EIDBQRQ1 part is unused and in its original packaging.
Return procedure for ADS7841EIDBQRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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