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Texas Instruments ADS7816E/2K5
- Part No.:
- ADS7816E/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS7816E/2K5.pdf
- Description:
- IC ADC 12BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,431
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Product details
Overview
ADS7816E/2K5 from Burr-Brown (now Texas Instruments) is a 12-bit, 200kHz sampling SAR analog-to-digital converter with differential input, synchronous serial interface, and programmable reference range (100mV–5V). It delivers 1.9mW power at full rate, 3µA shutdown current, and ±2 LSB integral linearity - optimized for remote, isolated, or battery-powered data acquisition.
For engineers reviewing the ADS7816E/2K5 datasheet, ADS7816E/2K5 pinout, ADS7816E/2K5 application, or ADS7816E/2K5 equivalent, key selection factors include its micro-power operation at variable sample rates (12.5kHz–200kHz), differential input rejection capability, MSOP-8 package footprint, and reference-voltage-dependent resolution (24µV–1.22mV).
Technical Context
The ADS7816E/2K5 implements a capacitive redistribution successive approximation register (SAR) architecture on 0.6µm CMOS, integrating sample-and-hold functionality. Conversion is initiated by CS/SHDN falling edge, with 12-bit straight-binary output clocked serially on DOUT synchronized to DCLOCK falling edges.
It requires external reference (100mV–5V) and clock (10kHz–3.2MHz); analog input operates differentially between +In and –In, where –In is limited to ±200mV and serves as remote ground sense. Power-down is active when CS = VCC or after conversion completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - supports 4096 discrete digital codes across full-scale input span. |
| Sampling Rate | 200kHz maximum - enables real-time acquisition of signals up to 100kHz (Nyquist-limited). |
| Reference Range | 100mV to 5V - sets LSB size from 24µV to 1.22mV, directly scaling measurement granularity. |
| Power Consumption | 1.9mW at 200kHz - enables continuous high-speed operation in energy-constrained systems. |
| Shutdown Current | 3µA max - reduces system standby power when idle, critical for battery longevity. |
| Differential Input | +In/–In inputs - allows rejection of common-mode noise up to ±200mV on –In, supporting remote ground sensing. |
| Serial Interface | 3-wire synchronous (CS/SHDN, DCLOCK, DOUT) - simplifies microcontroller integration with minimal GPIO usage. |
Pinout & Package
ADS7816E/2K5 is housed in an 8-lead MSOP package (Package Drawing 337), measuring 3.0mm × 3.0mm × 1.0mm, suitable for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VREF | Reference voltage input | Defines full-scale analog input range; accepts 100mV–5V; draws 2.4–100µA depending on sample rate and code. |
| 2 +In | Non-inverting analog input | Accepts signal up to VCC + 0.2V; sampled differentially against –In; input capacitance = 25pF. |
| 3 –In | Inverting analog input | Limited to GND ±200mV; used for remote ground sensing or common-mode rejection, not full differential swing. |
| 4 GND | Analog ground reference | Must connect to clean analog ground plane; isolation from digital ground prevents noise coupling into conversion. |
| 5 CS/SHDN | Chip select / shutdown control | Active-low conversion trigger; HIGH forces full power-down (3µA), disabling both analog and digital sections. |
| 6 DOUT | Serial data output | Outputs 12-bit straight-binary MSB-first after null bit; tri-states when CS goes HIGH mid-transfer. |
| 7 DCLOCK | Data clock input | Synchronizes serial output and controls conversion speed; min pulse width 150ns; frequency 10kHz–3.2MHz. |
| 8 +VCC | Positive supply | Operates from 4.5V–5.25V; supplies analog and digital circuitry; bypass with 0.1µF ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Micro-power operation | 150µW at 12.5kHz sample rate - extends battery life in portable instrumentation without sacrificing resolution. |
| Programmable reference sensitivity | LSB = VREF/4096 - enables precise low-voltage measurement (e.g., 100mV ref → 24µV LSB) for thermocouple or strain gauge interfaces. |
| Short-cycling capability | Early termination via CS HIGH - allows partial conversions (e.g., 4–8 bits) to reduce power and latency in threshold-detection applications. |
| Differential input with remote ground sense | –In pin supports connection to remote signal ground - mitigates ground loop errors in isolated or long-cable sensor systems. |
| CMOS-compatible digital interface | VIH ≥ 3V, VOL ≤ 0.4V at 250µA - ensures robust interfacing with standard 5V microcontrollers and FPGAs. |
Applications
| Thermocouple Signal Conditioning | Isolated Industrial Sensor Node |
|---|---|
Use Scenario: Measuring temperature from K-type thermocouples with 100mV full-scale range using resistor-divider scaling. IC Role / Device Role / Timing Role: ADC front-end digitizing µV-level differential thermocouple outputs with remote ground referenced at sensor location. Use Value: Achieves <1°C accuracy at room temperature using 100mV reference (24µV LSB), while rejecting common-mode noise from long sensor leads. |
Use Scenario: Remote analog monitoring in hazardous zones, powered via 4–20mA loop or energy harvesting. IC Role / Device Role / Timing Role: Low-power SAR ADC acquiring multiple sensor channels with automatic shutdown between samples. Use Value: 3µA shutdown current and 150µW active power enable >1-year battery life in wireless sensor nodes sampling at 12.5Hz. |
| Battery-Powered Portable DMM | Medical Patient Monitor Front-End |
Use Scenario: Handheld digital multimeter requiring 12-bit resolution across multiple voltage ranges (100mV–5V). IC Role / Device Role / Timing Role: Core sampling ADC with software-selectable reference to maintain LSB consistency across ranges. Use Value: Reference flexibility eliminates need for precision gain-switching op-amps; differential input rejects EMI during field measurements. |
Use Scenario: Low-noise acquisition of biopotential signals (ECG, EEG) with isolated patient interface. IC Role / Device Role / Timing Role: Isolated-side ADC converting amplified sensor outputs before galvanic isolation barrier. Use Value: 86dB SFDR and 72dB SINAD at 1kHz support clinical-grade signal fidelity; MSOP-8 footprint fits compact isolation modules. |
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 |
|---|---|---|---|
| ADS7816U/2K5 | Same architecture and specs, but in SOIC-8 package (larger footprint, higher thermal mass). | Preferred for prototyping or manual assembly; less suitable for ultra-compact PCBs. | Select when board space permits and thermal stability under sustained 200kHz operation is prioritized. |
| ADS7822U | 12-bit, 200kHz SAR ADC with internal reference (2.5V), no VREF pin; consumes 2.5mW at full rate. | Eliminates external reference design complexity but fixes full-scale range; lacks differential input. | Choose when fixed-range single-ended measurement suffices and BOM simplification outweighs flexibility loss. |
Compared with ADS7816U/2K5, the ADS7816E/2K5 offers identical electrical performance in a 3×3mm MSOP package - reducing PCB area by ~60%. Versus ADS7822U, it retains programmable reference and differential input at lower quiescent power, making it superior for multi-range or noise-sensitive isolated acquisition.
Availability
ADS7816E/2K5 is available at Aetrix Electronics and suitable for battery-powered instrumentation, isolated sensor nodes, portable test equipment, and medical front-end designs requiring stable component supply across extended production lifecycles.
Supply support for ADS7816E/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
Burr-Brown Corporation, acquired by Texas Instruments in 2000, specialized in precision analog ICs including data converters, amplifiers, and references for industrial and instrumentation markets.
The ADS7816E/2K5 belongs to Burr-Brown's micro-power SAR ADC product line, designed specifically for portable, remote, and isolated data acquisition systems where resolution, power efficiency, and small size are co-prioritized.
FAQ
What is the minimum reference voltage supported by the ADS7816E/2K5?
The ADS7816E/2K5 supports a reference voltage as low as 100mV, which sets the full-scale input span and yields a 24µV LSB. Operation below this voltage is not guaranteed per datasheet specifications, and effective number of bits degrades significantly below 100mV due to increased relative noise impact.
Does the ADS7816E/2K5 require an external clock source?
Yes, the ADS7816E/2K5 requires an external DCLOCK signal ranging from 10kHz to 3.2MHz. The clock duty cycle is flexible as long as high/low times exceed 150ns. Clock frequency directly determines throughput - e.g., 3.2MHz clock enables 200kHz sampling - and affects reference current draw.
Can the ADS7816E/2K5 perform true differential measurements across its full input range?
No. While the ADS7816E/2K5 has differential inputs (+In and –In), the –In pin is restricted to ±200mV around ground. It is intended for remote ground sensing or small common-mode rejection, not full-rail differential signaling. Full-scale differential operation (e.g., ±2.5V) is not supported.
How does power consumption scale with sample rate in the ADS7816E/2K5?
ADS7816E/2K5 power scales nearly linearly with sample rate: 1.9mW at 200kHz, 150µW at 12.5kHz. This is achieved via automatic power-down between conversions and clock-gated analog circuitry. Holding CS HIGH between samples further reduces current to 3µA, enabling ultra-low average power in burst-mode applications.
What layout practices are critical for achieving specified performance with the ADS7816E/2K5?
For ADS7816E/2K5, place a 0.1µF ceramic bypass capacitor directly at the +VCC pin, use separate analog/digital ground planes tied at a single point, route +In/–In as matched-length differential pair, and isolate VREF with its own 0.1µF capacitor. Avoid routing digital traces near analog inputs or VREF to prevent coupling-induced INL/DNL degradation.
ADS7816E/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- 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:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7816E/2K5 FAQ
1.How can I place an order for ADS7816E/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7816E/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 ADS7816E/2K5 reliable?
The price and inventory of ADS7816E/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7816E/2K5 is usually 5 days.
3.What payment methods are accepted for ADS7816E/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7816E/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7816E/2K5?
ADS7816E/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7816E/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 ADS7816E/2K5?
For technical support, including ADS7816E/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7816E/2K5 requirements.
6.How does Aetrix verify that ADS7816E/2K5 is sourced from the original manufacturer or authorized distributors?
All ADS7816E/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 ADS7816E/2K5 meets industry standards.
7.What is the process for return or replacement of ADS7816E/2K5?
All ADS7816E/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7816E/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 ADS7816E/2K5 part is unused and in its original packaging.
Return procedure for ADS7816E/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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