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Texas Instruments ADS7841E/2K5G4
- Part No.:
- ADS7841E/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADS7841E/2K5G4.pdf
- Description:
- IC ADC 12BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,269
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Product details
Overview
ADS7841E/2K5G4 from Texas Instruments is a 12-bit, 4-channel SAR analog-to-digital converter with synchronous serial interface, ±1 LSB INL/DNL accuracy, 200 kHz max throughput at +5 V, and selectable 8-/12-bit resolution - used in portable data loggers for multi-sensor voltage monitoring under battery-constrained conditions.
For engineers reviewing the ADS7841E/2K5G4 datasheet, ADS7841E/2K5G4 pinout, ADS7841E/2K5G4 application, or ADS7841E/2K5G4 equivalent, key selection factors include single-supply 2.7–5 V operation, SSOP-16 package compatibility, differential/single-ended input flexibility, and guaranteed no-missing-codes performance across –40°C to +85°C.
Technical Context
The ADS7841E/2K5G4 implements a capacitive redistribution SAR architecture with integrated sample-and-hold, supporting both 4-channel single-ended (COM-referenced) and 2-channel differential input configurations via programmable A2–A0 and SGL/DIF control bits. Its conversion timing is synchronized to an external DCLK, requiring 15–24 clock cycles depending on mode and overlap strategy.
It features a shutdown pin (SHDN) enabling <15 µW power-down, a MODE pin that fixes 12-bit resolution when low, and a VREF input scalable from 100 mV to +VCC - directly setting full-scale range and LSB weight (e.g., 1.22 mV at 5 V). Reference current scales with sample rate and VREF magnitude, reaching 13 µA typical at 125 kHz / 2.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | Programmable 8-bit or 12-bit; 12-bit enables 1 LSB = 1.22 mV @ 5 V VREF for precision sensor digitization. |
| Throughput Rate | Up to 200 kHz @ +5 V; supports real-time sampling of audio-band and control-loop signals. |
| INL / DNL | ±1 LSB max (typical); ensures monotonicity and predictable code transitions without missing codes. |
| SINAD | 72 dB @ 10 kHz input; delivers >11.5 effective bits for high-fidelity measurement applications. |
| Supply Range | 2.7 V to 5.0 V; operates from single Li-ion cell or regulated 3.3 V/5 V rails without level-shifting. |
| Input Configuration | 4-channel single-ended or 2-channel differential; COM pin sets zero-reference point for offset-tolerant sensing. |
| Power Dissipation | 2 mW @ 200 kHz / +5 V; drops to <15 µW in shutdown - critical for battery life in portable systems. |
Pinout & Package
ADS7841E/2K5G4 is supplied in SSOP-16 (DBQ) package, 4.9 mm × 6.0 mm, 0.65 mm pitch, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VCC (Pins 1, 9) | Power supply input | Dual power pins reduce IR drop and improve noise immunity; accepts 2.7–5.0 V with internal regulation. |
| CH0–CH3 (Pins 2–5) | Analog input channels | Four independent inputs configurable as single-ended (vs COM) or differential pairs (e.g., CH0–CH1). |
| COM (Pin 6) | Analog ground reference | Sets zero-code voltage in single-ended mode; may be tied to system AGND or offset bias point. |
| SHDN (Pin 7) | Hardware shutdown control | Active-low signal reduces quiescent current to <15 µW; no sequencing required for wake-up. |
| VREF (Pin 8) | Reference voltage input | Unbuffered input; sets full-scale range (0 V to VREF); LSB = VREF / 4096 determines resolution granularity. |
| GND (Pin 10) | Digital/analog common ground | Single ground pin requires star-point layout to minimize digital switching noise coupling into analog path. |
| MODE (Pin 11) | Resolution select override | When low, forces 12-bit conversion regardless of control byte; eliminates software dependency for fixed-precision use. |
| DOUT (Pin 12) | Serial data output | High-impedance when CS = high; outputs straight-binary MSB-first data synchronized to DCLK falling edge. |
| BUSY (Pin 13) | Conversion status indicator | Active-high open-drain output signals ongoing conversion; enables interrupt-driven readout without polling. |
| DIN (Pin 14) | Serial command input | Latches control byte (S, A2–A0, MODE, SGL/DIF, PD1–PD0) on rising DCLK edge when CS = low. |
| CS (Pin 15) | Chip select | Edge-triggered enable: falling edge initiates acquisition; rising edge disables DOUT/BUSY and resets interface. |
| DCLK (Pin 16) | External serial clock | Drives SAR logic and serial I/O; supports up to 3.2 MHz (200 kHz throughput); tolerant to 5.5 V even at 2.7 V supply. |
Key Features
| Feature | Design Value |
|---|---|
| No missing codes | Guaranteed monotonic transfer function across full temperature range (–40°C to +85°C), eliminating ambiguity in control or safety-critical decisions. |
| Configurable input topology | Software-selectable single-ended (4 ch) or differential (2 ch) modes via serial control byte - adapts to sensor output type without hardware change. |
| Low-power shutdown | Hardware SHDN pin reduces supply current to <15 µW, enabling microamp-level system sleep states in handheld instrumentation. |
| Wide reference range | VREF accepts 100 mV to +VCC, allowing direct interfacing to low-voltage sensors (e.g., thermocouples, bridge outputs) without external amplification. |
| CMOS-compatible interface | All digital pins tolerate 5.5 V inputs regardless of +VCC (2.7–5 V), simplifying connection to mixed-voltage microcontrollers and isolators. |
Applications
| Portable Data Logging | Industrial Sensor Interface |
|---|---|
Use Scenario: Battery-powered field recorder acquiring temperature, pressure, and humidity from four analog sensors at 100 Hz. IC Role / Device Role / Timing Role: ADC front-end with integrated multiplexer and serial output, performing 12-bit conversions with <15 µW shutdown between samples. Use Value: Enables >1-year battery life using two AA cells while maintaining ±1 LSB linearity and no missing codes across –20°C to +60°C ambient. | Use Scenario: PLC analog input module conditioning 4–20 mA loop signals from flow meters and valve positioners. IC Role / Device Role / Timing Role: Precision digitizer with differential input capability and COM-referenced single-ended mode for current-to-voltage conversion stages. Use Value: Delivers 72 dB SINAD and ±1 LSB INL to resolve sub-0.1% process variations, with SSOP-16 footprint minimizing PCB area in dense I/O modules. |
| Medical Vital Signs Monitor | Test Equipment Front-End |
Use Scenario: Handheld ECG device measuring lead I, II, III, and aVR with simultaneous 12-bit sampling. IC Role / Device Role / Timing Role: Low-noise, low-power ADC with programmable gain and differential channel pairing to reject common-mode interference. Use Value: Achieves >11.5 ENOB at 1 kHz with 2.5 V reference, meeting IEC 60601-2-27 requirements for diagnostic-grade waveform fidelity. | Use Scenario: Benchtop multimeter digitizing DC/AC voltage, resistance, and diode test signals across multiple ranges. IC Role / Device Role / Timing Role: Flexible input-stage ADC supporting both ratiometric (VREF = sensor excitation) and absolute (external precision reference) measurement modes. Use Value: Supports auto-ranging via software-controlled VREF scaling (100 mV–5 V), reducing need for external PGA and improving measurement versatility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7841EB/2K5 | Enhanced grade: ±1 LSB INL / ±3 LSB gain error vs ±2 / ±4 for ADS7841E/2K5; same SSOP-16 package and pinout. | Required where tighter DC accuracy is needed (e.g., calibration equipment), but not necessary for general-purpose logging. | Select ADS7841EB/2K5 only if datasheet-specified INL/Gain error budgets demand <±1.5 LSB total unadjusted error. |
| MAX1247ACPP+ | Pin-compatible 12-bit SAR ADC; ±1 LSB INL, 250 kSPS max, 2.7–5.25 V supply; differs in control protocol (SPI-compatible vs TI's proprietary serial format). | Used in legacy designs migrating from Maxim platforms; requires firmware rework for DIN/DOUT timing and control byte structure. | Choose MAX1247ACPP+ only when replacing existing MAX1247-based boards and SPI-native interface is preferred over TI's serial protocol. |
Compared with ADS7841EB/2K5, the ADS7841E/2K5 trades 1 LSB higher INL for lower cost and broader availability; versus MAX1247ACPP+, it retains identical pinout and layout but requires adaptation of serial command framing and timing - making it optimal for new TI-ecosystem designs prioritizing supply chain stability and low-power shutdown.
Availability
ADS7841E/2K5G4 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor nodes, and medical monitoring devices requiring stable component supply, long-term manufacturability, and RoHS-compliant SSOP packaging.
Supply support for ADS7841E/2K5G4 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, embedded processing, and connectivity technologies, with decades of expertise in precision data converters and low-power design.
The ADS7841 series was developed for battery-operated, multi-channel measurement systems - emphasizing low quiescent current, flexible input configuration, and robust serial interface compatibility with microcontrollers and isolation barriers.
FAQ
What is the operating temperature range for ADS7841E/2K5G4?
The ADS7841E/2K5G4 is specified for operation from –40°C to +85°C. This range is validated per the ADS7841E ordering option in the SBAS084B datasheet and applies to the SSOP-16 (DBQ) package variant shipped in tape-and-reel format as ADS7841E/2K5G4. It does not extend to the +125°C ES grade.
Does ADS7841E/2K5G4 support differential input mode?
Yes, ADS7841E/2K5G4 supports true 2-channel differential input mode via the SGL/DIF control bit and A2–A0 channel select bits. When SGL/DIF = LOW, pairs such as CH0–CH1 or CH2–CH3 become differential inputs referenced internally, enabling rejection of common-mode noise up to 120 dB at 50 kHz as characterized in the datasheet.
What is the minimum VREF voltage supported by ADS7841E/2K5G4?
The ADS7841E/2K5G4 supports VREF as low as 100 mV, per Absolute Maximum Ratings and Electrical Characteristics tables. At 100 mV, LSB size is 24 µV, though internal noise dominates - requiring oversampling or digital filtering to stabilize output codes, as documented in the Reference Input section of SBAS084B.
How does the MODE pin affect resolution in ADS7841E/2K5G4?
When the MODE pin is held LOW, ADS7841E/2K5G4 always performs 12-bit conversions regardless of the MODE bit in the control byte. This hardware override simplifies firmware for fixed-precision applications and eliminates risk of accidental 8-bit mode activation during serial communication errors.
Is ADS7841E/2K5G4 RoHS compliant and lead-free?
Yes, ADS7841E/2K5G4 is RoHS compliant and lead-free. The SSOP-16 (DBQ) package uses lead-free terminations and meets JEDEC J-STD-020 moisture sensitivity level 3 requirements, as confirmed in Texas Instruments' official packaging documentation for the ADS7841E ordering option.
ADS7841E/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- Qualification:
- -
ADS7841E/2K5G4 FAQ
1.How can I place an order for ADS7841E/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7841E/2K5G4 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 ADS7841E/2K5G4 reliable?
The price and inventory of ADS7841E/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7841E/2K5G4 is usually 5 days.
3.What payment methods are accepted for ADS7841E/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7841E/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7841E/2K5G4?
ADS7841E/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7841E/2K5G4 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 ADS7841E/2K5G4?
For technical support, including ADS7841E/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7841E/2K5G4 requirements.
6.How does Aetrix verify that ADS7841E/2K5G4 is sourced from the original manufacturer or authorized distributors?
All ADS7841E/2K5G4 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 ADS7841E/2K5G4 meets industry standards.
7.What is the process for return or replacement of ADS7841E/2K5G4?
All ADS7841E/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7841E/2K5G4, 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 ADS7841E/2K5G4 part is unused and in its original packaging.
Return procedure for ADS7841E/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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