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Texas Instruments ADS7816EB/2K5
- Part No.:
- ADS7816EB/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS7816EB/2K5.pdf
- Description:
- IC ADC 12BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,853
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Product details
Overview
ADS7816EB/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 - ideal for low-power remote data acquisition in battery-powered or isolated systems.
For engineers reviewing the ADS7816EB/2K5 datasheet, ADS7816EB/2K5 pinout, ADS7816EB/2K5 application, or ADS7816EB/2K5 equivalent, key selection considerations include its MSOP-8 package, micro-power operation at variable sample rates (12.5kHz–200kHz), differential input rejection capability, reference-voltage-dependent LSB resolution (24µV–1.22mV), and CMOS-compatible serial timing with CS/SHDN-controlled power-down.
Technical Context
The ADS7816EB/2K5 implements a capacitive redistribution successive approximation register (SAR) architecture on 0.6µm CMOS, integrating sample-and-hold functionality. It requires an external clock (10kHz–3.2MHz), single +5V supply, and external reference - with conversion time fixed at 12 clock cycles and acquisition time of 1.5 clock cycles.
Its differential analog input (+In/–In) captures voltage difference directly onto internal capacitor array during hold mode; –In is limited to ±200mV and intended for remote ground sensing rather than common-mode rejection. Serial output is straight-binary, MSB-first, enabled by falling-edge-triggered DCLOCK and CS-initiated frame start.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - supports 4096 discrete digital codes over full-scale input span. |
| Sampling Rate | 200kHz maximum - enables real-time monitoring of signals up to ~99kHz (Nyquist-limited). |
| Reference Range | 100mV to 5V - sets full-scale input span and LSB size (24µV at 100mV, 1.22mV at 5V). |
| Power Consumption | 1.9mW at 200kHz; 150µW at 12.5kHz - scales linearly with throughput for optimized battery life. |
| Shutdown Current | 3µA max - achieved when CS/SHDN = VCC, disabling analog and digital sections. |
| INL / DNL | ±2 LSB / ±1 LSB - specified for ADS7816EB grade, ensuring monotonicity and <0.05% full-scale error. |
| Supply Voltage | +4.5V to +5.25V - operates within standard 5V logic rail with 5% tolerance margin. |
Pinout & Package
ADS7816EB/2K5 is housed in an 8-lead MSOP package (Package Drawing 337), measuring 3.0mm × 3.0mm × 1.0mm, with exposed thermal pad (not electrically connected). Pin spacing is 0.65mm; recommended reflow profile complies with JEDEC J-STD-020C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VREF | Reference voltage input | External precision reference (100mV–5V); supplies scaling for full-scale analog input range and determines LSB weight. |
| 2 +In | Non-inverting analog input | Differential input node; accepts voltage from GND–0.2V to VCC+0.2V; sampled onto internal capacitor array. |
| 3 –In | Inverting analog input | Remote ground sense point; limited to ±200mV deviation from local GND - not for high-common-mode rejection. |
| 4 GND | Analog ground reference | Low-impedance return path for analog circuitry; must be separated from digital ground to minimize noise coupling. |
| 5 CS/SHDN | Chip select / shutdown control | Active-low conversion trigger; HIGH forces full power-down (3µA), LOW initiates sampling and enables DOUT. |
| 6 DOUT | Serial data output | CMOS-level output; transmits 12-bit straight-binary result MSB-first on falling DCLOCK edge after null bit. |
| 7 DCLOCK | Data clock input | Synchronizes serial transfer and controls conversion speed; min pulse width 150ns; duty cycle non-critical. |
| 8 +VCC | Positive supply | +4.5V to +5.25V analog/digital supply; requires local 0.1µF ceramic bypass placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Differential input architecture | Enables remote ground sensing via –In pin, reducing measurement error in distributed sensor systems with ground potential differences. |
| Programmable reference range | 100mV–5V adjustment allows optimization of dynamic range for low-level sensors (e.g., thermocouples) without external gain stages. |
| Micro-power serial interface | Consumes only 150µW at 12.5kHz sample rate - extends battery life in portable DAQ nodes beyond 10 years (typical). |
| CS-controlled power-down | 3µA shutdown current with no external circuitry required; eliminates need for discrete enable logic or LDO sequencing. |
| No pipeline delay | Serial output reflects conversion currently in progress - enables deterministic latency-critical control loops (e.g., closed-loop motor feedback). |
Applications
| Thermocouple-Based Temperature Monitoring | Isolated Industrial Sensor Interface |
|---|---|
Use Scenario: Measuring K-type thermocouple outputs (≈41µV/°C) across –200°C to +1372°C range using programmable 100mV reference to maximize resolution. IC Role / Device Role / Timing Role: ADC front-end with differential input rejecting ground loop noise; serial interface synchronized to host µC's SPI peripheral. Use Value: Achieves <1°C temperature resolution without signal conditioning amplifiers, reducing BOM cost and board area in multi-channel modules. |
Use Scenario: Digitizing 4–20mA current loop sensor outputs in hazardous-area field transmitters with galvanic isolation between analog and digital domains. IC Role / Device Role / Timing Role: Low-power, isolated-side ADC converting conditioned voltage into serial stream transmitted across opto-coupler or digital isolator. Use Value: Enables >10-year battery operation in wireless HART-enabled transmitters due to 3µA shutdown and 150µW active power at 12.5kHz sampling. |
| Battery-Powered Portable Data Logger | Remote Environmental Sensor Node |
Use Scenario: Logging soil moisture, ambient light, and air pressure in solar-charged IoT nodes deployed in agricultural fields for seasonal monitoring. IC Role / Device Role / Timing Role: Primary ADC acquiring multiple sensor channels via external multiplexer; powered only during scheduled 1-minute sampling bursts. Use Value: Reduces average system current to <10µA per measurement cycle - extends 2000mAh Li-ion battery life to >5 years with daily logging. |
Use Scenario: Deploying ultra-low-power sensor clusters along pipelines or utility corridors to detect vibration, temperature drift, or acoustic anomalies. IC Role / Device Role / Timing Role: Standalone ADC interfaced to MEMS accelerometer and RTD; wakes on interrupt, samples at 200Hz, then returns to 3µA shutdown. Use Value: Eliminates need for always-on µC supervision - direct CS/SHDN control allows hardware-triggered acquisition with zero firmware overhead. |
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 | SOIC-8 package; same electrical specs but larger footprint (4.9mm × 6.0mm) and higher thermal resistance (θJA = 160°C/W vs. 140°C/W for MSOP). | Better suited for prototyping or space-tolerant industrial PCBs where manual soldering or thermal mass is preferred. | Select ADS7816U/2K5 if board layout allows SOIC and thermal management prioritizes simplicity over miniaturization. |
| ADS7822U | 12-bit, 200kHz SAR ADC with internal reference (2.5V), SPI-compatible interface, and SOIC-8 package; no external VREF required but fixed full-scale range. | Ideal for cost-sensitive designs where reference stability is less critical and board space permits SOIC. | Choose ADS7822U when eliminating external reference circuitry outweighs loss of programmable input range flexibility. |
Compared with ADS7816U/2K5, ADS7816EB/2K5 offers 35% smaller PCB area and lower thermal impedance for dense layouts; versus ADS7822U, it trades internal reference convenience for full 100mV–5V range adaptability - critical for multi-sensor systems requiring dynamic full-scale adjustment.
Availability
ADS7816EB/2K5 is available at Aetrix Electronics and suitable for battery-operated instrumentation, isolated sensor interfaces, and remote environmental monitoring requiring stable component supply across extended product lifecycles.
Supply support for ADS7816EB/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, op amps, and voltage references.
The ADS7816EB/2K5 belongs to Burr-Brown's micro-power SAR ADC family designed specifically for portable and isolated data acquisition - emphasizing low quiescent current, flexible reference scaling, and minimal external component count.
FAQ
What is the minimum reference voltage supported by the ADS7816EB/2K5?
The ADS7816EB/2K5 supports a minimum reference voltage of 100mV, enabling high-resolution digitization of low-level sensor outputs such as thermocouples. At this setting, LSB size is 24µV, and effective number of bits (ENOB) drops to ~10.25 bits due to increased relative noise contribution - verified in Figure 5 of the datasheet.
Does the ADS7816EB/2K5 require an external clock source?
Yes, the ADS7816EB/2K5 requires an external DCLOCK signal ranging from 10kHz to 3.2MHz. The clock frequency directly determines throughput: fCLK = 16 × fSAMPLE yields 200kHz sampling; lower rates (e.g., 200kHz fCLK) support 12.5kHz throughput. Minimum high/low times are 150ns each.
How does the CS/SHDN pin function in the ADS7816EB/2K5?
In the ADS7816EB/2K5, CS/SHDN serves dual roles: pulled LOW to initiate conversion and serial data output, and driven HIGH to enter full power-down mode drawing ≤3µA. Unlike many ADCs, it does not require separate shutdown control - simplifying interface design while ensuring lowest possible standby current.
Can the ADS7816EB/2K5 perform partial conversions to save power?
Yes, the ADS7816EB/2K5 supports short-cycling: pulling CS/SHDN HIGH after n clock edges terminates conversion and places DOUT in tri-state. This allows early termination (e.g., after 8 bits) when full 12-bit resolution is unnecessary - reducing average power in event-driven sensing applications.
What is the absolute maximum rating for analog input voltage on the ADS7816EB/2K5?
The ADS7816EB/2K5 specifies absolute maximum analog input voltage as –0.3V to (+VCC + 0.3V) on both +In and –In pins. Exceeding these limits risks permanent damage. For reliable operation within specifications, +In must stay within GND–0.2V to VCC+0.2V, and –In must remain within ±200mV of GND - per Absolute Maximum Ratings and Analog Input sections.
ADS7816EB/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:
- -
ADS7816EB/2K5 FAQ
1.How can I place an order for ADS7816EB/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7816EB/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 ADS7816EB/2K5 reliable?
The price and inventory of ADS7816EB/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7816EB/2K5 is usually 5 days.
3.What payment methods are accepted for ADS7816EB/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7816EB/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7816EB/2K5?
ADS7816EB/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7816EB/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 ADS7816EB/2K5?
For technical support, including ADS7816EB/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7816EB/2K5 requirements.
6.How does Aetrix verify that ADS7816EB/2K5 is sourced from the original manufacturer or authorized distributors?
All ADS7816EB/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 ADS7816EB/2K5 meets industry standards.
7.What is the process for return or replacement of ADS7816EB/2K5?
All ADS7816EB/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7816EB/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 ADS7816EB/2K5 part is unused and in its original packaging.
Return procedure for ADS7816EB/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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