My Inquiry
My Account
Texas Instruments ADS7841E/2K5
- Part No.:
- ADS7841E/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADS7841E/2K5.pdf
- Description:
- IC ADC 12BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,826
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS7841E/2K5 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 programmable 8-/12-bit resolution - used in portable data loggers for multi-sensor voltage monitoring under battery-constrained conditions.
For engineers reviewing the ADS7841E/2K5 datasheet, ADS7841E/2K5 pinout, ADS7841E/2K5 application, or ADS7841E/2K5 equivalent, key selection factors include single-supply operation (2.7–5 V), SSOP-16 package with 16-pin serial control interface, differential/single-ended input flexibility, and guaranteed no missing codes across –40°C to +85°C.
Technical Context
The ADS7841E/2K5 implements a capacitive redistribution SAR architecture with integrated sample-and-hold, driven by an external clock (DCLK) and controlled via 8-bit serial command byte. It uses a 4-channel analog multiplexer selectable via A2–A0 and SGL/DIF bits to route inputs either single-ended (vs COM) or differential (CHx vs CHy).
Conversion timing supports three modes: 24-clock (standard), 16-clock (overlapped control), or 15-clock (FPGA-optimized) cycles per conversion. Power management includes auto power-down (PD1/PD0 = 00) and hardware shutdown (SHDN low), reducing quiescent current to ≤3 µA in sleep states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | Programmable 8-bit or 12-bit - enables trade-off between speed (8-bit @ 2× throughput) and precision (12-bit @ 1 LSB = 1.22 mV at 5 V ref). |
| Input Channels | 4 single-ended or 2 differential - supports simultaneous multi-sensor acquisition without external MUX, reducing BOM and layout complexity. |
| Throughput Rate | Up to 200 kHz at +5 V - sufficient for real-time sampling of audio-band and control-loop signals in portable instrumentation. |
| INL / DNL | ±1 LSB max - ensures monotonicity and <0.025% full-scale linearity error, critical for closed-loop feedback and calibration-sensitive measurement. |
| Supply Range | 2.7 V to 5.25 V - compatible with Li-ion, 3.3 V logic, and 5 V legacy systems without level-shifting or LDO overhead. |
| Reference Range | 0.1 V to VCC - allows flexible scaling of input range (e.g., 0–2.5 V or 0–100 mV), enabling high-resolution low-voltage sensing with external precision reference. |
| Power Dissipation | 2 mW typical at 200 kHz / +5 V - extends battery life in PDA and handheld test equipment; drops to <15 µW in shutdown mode. |
Pinout & Package
ADS7841E/2K5 is packaged in SSOP-16 (DBQ), a 16-pin, 0.15 mm pitch, surface-mount plastic small outline package measuring 4.9 mm × 3.9 mm × 1.6 mm - optimized for space-constrained portable PCBs while maintaining thermal performance up to +85°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 9 | +VCC | Primary power supply input (2.7–5.25 V); dual pins reduce IR drop and improve noise immunity in high-speed conversion. |
| 2–5 | CH0–CH3 | Analog input channels; configurable as single-ended (vs COM) or differential pairs (e.g., CH0–CH1) via serial control bits. |
| 6 | COM | Common-mode reference for single-ended inputs; sets zero-code point - must be connected to stable ground or bias point. |
| 7 | SHDN | Hardware shutdown enable; active-low assertion reduces supply current to <15 µW - ideal for duty-cycled sensor nodes. |
| 8 | VREF | Unbuffered reference input; directly drives internal CDAC - requires low-noise source and local 0.1 µF + 1–10 µF bypassing. |
| 10 | GND | Analog/digital common ground; separate from COM - critical for minimizing ground bounce during SAR switching transients. |
| 11 | MODE | Hardware resolution select; LOW forces 12-bit mode regardless of control byte - simplifies firmware for fixed-precision applications. |
| 12 | DOUT | Tri-state serial data output; driven on DCLK falling edge - enables daisy-chaining or isolation via digital optocouplers. |
| 13 | BUSY | Open-drain status flag; HIGH during acquisition/conversion - provides hardware handshaking without polling overhead. |
| 14 | DIN | Serial command input; latched on DCLK rising edge - accepts 8-bit control byte defining channel, mode, and power state. |
| 15 | CS | Chip select; initiates conversion sequence and enables DOUT/BUSY - must remain LOW for full 24-clock cycle. |
| 16 | DCLK | External serial clock input; frequency determines throughput - supports up to 3.2 MHz (200 kHz rate) with 16-cycle timing. |
Key Features
| Feature | Design Value |
|---|---|
| No missing codes | Guaranteed monotonic transfer function across full temperature range - eliminates decision ambiguity in control algorithms and threshold detection. |
| 72 dB SINAD | Validated signal fidelity at 10 kHz input - supports accurate RMS, THD, and spectral analysis in portable test equipment. |
| Channel-to-channel isolation | 120 dB at 50 kHz - prevents crosstalk between simultaneously sampled sensors (e.g., thermocouple + pressure transducer). |
| Auto power-down mode | Reduces average current to ~3 µA between conversions - extends operational time in intermittent-sampling IoT edge nodes. |
| Overvoltage-tolerant digital I/O | VIH up to 5.5 V independent of +VCC - permits direct interfacing with 5 V microcontrollers even when ADC runs at 2.7 V. |
Applications
| Portable Data Loggers | Industrial Sensor Interfaces |
|---|---|
|
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and CO₂ from four analog sensors at 100 Hz. IC Role / Device Role / Timing Role: Central 4-channel ADC performing synchronized sampling, serially streaming 12-bit results to low-power MCU over SPI-compatible interface. Use Value: Single-chip solution eliminates external MUX and reference IC, reducing board area by 35% and extending 2000-mAh battery life to >12 months. |
Use Scenario: DIN-rail mounted PLC module acquiring 4–20 mA current loop signals from flow, level, and pressure transmitters. IC Role / Device Role / Timing Role: Isolated front-end ADC converting conditioned analog inputs into digital values for Modbus RTU transmission. Use Value: Differential input capability rejects common-mode noise on long industrial cables; 200 kHz throughput supports fast response diagnostics. |
| Handheld Test Equipment | Medical Vital Sign Monitors |
|
Use Scenario: Pocket-sized multimeter measuring DC voltage, AC RMS, and continuity with autoranging and backlit LCD. IC Role / Device Role / Timing Role: Precision ADC providing calibrated 12-bit digitization of scaled input ranges, with MODE pin hardwired for consistent resolution. Use Value: ±1 LSB INL ensures traceable accuracy per IEC 61010; low 2 mW dissipation prevents thermal drift during extended bench use. |
Use Scenario: Wearable ECG patch digitizing two lead signals (RA–LA, LA–LL) plus respiration impedance at 250 SPS. IC Role / Device Role / Timing Role: Dual-differential ADC channel pair operating in 12-bit mode with shared VREF and COM, synchronized by external DCLK. Use Value: 72 dB SINAD meets AAMI EC11 noise requirements; shutdown mode cuts idle power to enable 7-day wearable runtime. |
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 |
|---|---|---|---|
| MAX1247ACPP+ | Pin-compatible 12-bit SAR ADC; identical 4-channel MUX, 200 kHz rate, and SPI interface - but requires 5 V only (no 2.7 V support) and lacks MODE pin hardware override. | Best suited for fixed 5 V industrial systems where supply headroom is guaranteed; not viable for Li-ion or wide-input-range designs. | Select MAX1247ACPP+ only when migrating legacy 5 V designs and board layout reuse is mandatory. |
| ADS7841EB/2K5 | Enhanced grade: ±1 LSB INL / ±3 LSB gain error (vs ±2 / ±4 for ADS7841E/2K5); otherwise identical pinout, timing, and functionality. | Required for metrology-grade instruments demanding tighter linearity specs (e.g., Class 0.1 energy meters or calibration standards). | Choose ADS7841EB/2K5 when system-level INL budget is <±1 LSB; otherwise ADS7841E/2K5 delivers full performance at lower cost. |
Compared with MAX1247ACPP+, ADS7841E/2K5 offers wider supply range and hardware resolution lock; compared with ADS7841EB/2K5, it trades 1 LSB linearity for cost efficiency in non-calibration-critical portable systems.
Availability
ADS7841E/2K5 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and handheld test equipment requiring stable component supply with guaranteed tape-and-reel delivery of 2500 units per reel.
Supply support for ADS7841E/2K5 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 over 50 years of precision data converter innovation.
The ADS7841E/2K5 belongs to TI's precision SAR ADC product line, engineered for low-power, multi-channel data acquisition in battery-operated and space-constrained measurement systems.
FAQ
What is the maximum operating temperature range for the ADS7841E/2K5?
The ADS7841E/2K5 is specified for operation from –40°C to +85°C. This rating applies to the 'E' grade variant shipped in SSOP-16 packaging (DBQ). The higher-temperature 'ES' grade (ADS7841ES/2K5) supports –40°C to +125°C but is a distinct orderable part - ADS7841E/2K5 must not be used beyond +85°C in production designs.
Does the ADS7841E/2K5 require an external reference voltage?
Yes, the ADS7841E/2K5 requires an external reference voltage applied to the VREF pin. It accepts any stable voltage from 0.1 V to +VCC, and the full-scale input range is directly proportional to VREF (e.g., 0–VREF in single-ended mode). The device does not include an internal reference; omitting VREF will result in undefined conversion behavior.
Can the ADS7841E/2K5 perform true differential measurements between two arbitrary channels?
Yes, the ADS7841E/2K5 supports true differential input configurations using two of its four analog channels (e.g., CH0–CH1 or CH2–CH3) when SGL/DIF = LOW and appropriate A2–A0 bits are set. In this mode, the voltage difference appears across the internal +IN/–IN nodes, with common-mode rejection up to 120 dB at 50 kHz - confirmed in the Electrical Characteristics table.
What is the purpose of the MODE pin on the ADS7841E/2K5?
The MODE pin on the ADS7841E/2K5 provides hardware-level resolution control: when pulled LOW, it forces all conversions to 12-bit mode regardless of the MODE bit in the serial control byte. This eliminates firmware dependency on correct bit setting and ensures deterministic resolution in safety-critical or simplified software environments.
How does the SHDN pin affect power consumption in the ADS7841E/2K5?
Asserting SHDN LOW places the ADS7841E/2K5 into hardware shutdown mode, reducing total supply current to under 15 µW - verified in the Electrical Characteristics table under "Power-Down Mode". This state disables all internal circuitry including the reference buffer, serial interface, and SAR core, and requires CS and DCLK to be inactive during entry/exit.
ADS7841E/2K5 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:
- -
- Qualification:
- -
ADS7841E/2K5 FAQ
1.How can I place an order for ADS7841E/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7841E/2K5 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/2K5 reliable?
The price and inventory of ADS7841E/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7841E/2K5 is usually 5 days.
3.What payment methods are accepted for ADS7841E/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7841E/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7841E/2K5?
ADS7841E/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7841E/2K5 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/2K5?
For technical support, including ADS7841E/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7841E/2K5 requirements.
6.How does Aetrix verify that ADS7841E/2K5 is sourced from the original manufacturer or authorized distributors?
All ADS7841E/2K5 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/2K5 meets industry standards.
7.What is the process for return or replacement of ADS7841E/2K5?
All ADS7841E/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7841E/2K5, 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/2K5 part is unused and in its original packaging.
Return procedure for ADS7841E/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS7841E/2K5 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…
