ADS7866IDBVRG4 Equivalent & Substitute Parts

Part Overview

The ADS7866IDBVRG4 is a 12-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, featuring a single-ended input with SAR (Successive Approximation Register) architecture and SPI data interface. This microPOWER™ series device operates from 1.2V to 3.6V supply voltage and samples at 200 kSPS, packaged in SOT-23-6 surface mount configuration.

The ADS7866IDBVRG4 is discontinued at DiGi Electronics. Equivalent and substitute parts are available from Analog Devices Inc. and Linear Technology, offering improved performance specifications while maintaining electrical and mechanical compatibility within the defined parameter ranges.

Key Parameters

Parameter	ADS7866IDBVRG4
Resolution (Bits)	12
Sampling Rate	200 kSPS
Number of Inputs	1
Input Type	Single Ended
Data Interface	SPI
Architecture	SAR
Reference Type	External
Supply Voltage (Analog)	1.2V – 3.6V
Supply Voltage (Digital)	1.2V – 3.6V
Operating Temperature	–40°C to +85°C
Package	SOT-23-6
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following core parameters:

Resolution: 12 bits (fixed requirement)
Number of Inputs: 1 (fixed requirement)
Input Type: Single Ended (fixed requirement)
Data Interface: SPI (fixed requirement)
Architecture: SAR (fixed requirement)
Reference Type: External (fixed requirement)
Package: SOT-23-6 or TSOT-23-6 (mechanically compatible)
Mounting Type: Surface Mount (fixed requirement)
Supply Voltage Range: Must encompass or overlap with 1.2V – 3.6V
RoHS Compliance: ROHS3 Compliant (required)

All substitute parts listed meet these core electrical and mechanical requirements. Variations in sampling rate, operating temperature range, and inventory status do not preclude substitution but should be evaluated against application requirements.

Parameter Comparison

Part Number	Manufacturer	Sampling Rate	Supply Voltage (Analog)	Supply Voltage (Digital)	Operating Temperature	Package	Product Status	Inventory (Pcs)
ADS7866IDBVRG4	Texas Instruments	200 kSPS	1.2V – 3.6V	1.2V – 3.6V	–40°C to +85°C	SOT-23-6	Discontinued	15,600
LTC2362HS6#TRMPBF	Analog Devices Inc.	500 kSPS	2.35V – 3.6V	2.35V – 3.6V	–40°C to +125°C	TSOT-23-6	Active	743
LTC2362IS6#TRMPBF	Analog Devices Inc.	500 kSPS	2.35V – 3.6V	2.35V – 3.6V	–40°C to +85°C	TSOT-23-6	Active	1,117
LTC2365CS6#TRMPBF	Linear Technology	1 MSPS	2.35V – 3.6V	2.35V – 3.6V	0°C to +70°C	TSOT-23-6	Active	1,027
LTC2365HS6#TRMPBF	Analog Devices Inc.	1 MSPS	2.35V – 3.6V	2.35V – 3.6V	–40°C to +125°C	TSOT-23-6	Active	2,100
LTC2365IS6#TRMPBF	Analog Devices Inc.	1 MSPS	2.35V – 3.6V	2.35V – 3.6V	–40°C to +85°C	TSOT-23-6	Active	2,200
LTC2366CS6#TRMPBF	Analog Devices Inc.	3 MSPS	2.35V – 3.6V	2.35V – 3.6V	0°C to +70°C	TSOT-23-6	Active	50,400
LTC2366HS6#TRMPBF	Analog Devices Inc.	3 MSPS	2.35V – 3.6V	2.35V – 3.6V	–40°C to +125°C	TSOT-23-6	Active	3,789
LTC2366IS6#TRMPBF	Analog Devices Inc.	3 MSPS	2.35V – 3.6V	2.35V – 3.6V	–40°C to +85°C	TSOT-23-6	Active	1,581

Engineering Selection Recommendations

All listed substitute parts are ROHS3 compliant and carry Active product status, ensuring long-term availability and supply chain stability. The ADS7866IDBVRG4 is discontinued, making substitution necessary for new designs and ongoing production.

Selection among substitute parts should be based on application-specific requirements:

For minimum supply voltage compatibility: The ADS7866IDBVRG4 operates from 1.2V, while all substitute parts require minimum 2.35V. Applications requiring operation below 2.35V cannot use these substitutes.

For extended temperature range: LTC2362HS6#TRMPBF, LTC2365HS6#TRMPBF, and LTC2366HS6#TRMPBF support –40°C to +125°C, exceeding the original part's –40°C to +85°C range.

For industrial temperature range (0°C to +70°C): LTC2365CS6#TRMPBF and LTC2366CS6#TRMPBF are suitable.

For sampling rate requirements: LTC2362 series provides 500 kSPS, LTC2365 series provides 1 MSPS, and LTC2366 series provides 3 MSPS. Select based on application bandwidth requirements.

For supply availability: LTC2366CS6#TRMPBF offers the highest inventory (50,400 pcs), followed by LTC2366HS6#TRMPBF (3,789 pcs).

Frequently Asked Questions (FAQ)

Q: Can I directly replace ADS7866IDBVRG4 with any of these substitute parts?

A: Direct replacement is possible only if your application operates within the substitute part's supply voltage range (minimum 2.35V) and temperature range. All substitutes maintain identical pin configuration (SOT-23-6/TSOT-23-6), resolution (12-bit), input configuration (single-ended), and data interface (SPI).

Q: What is the difference between SOT-23-6 and TSOT-23-6 packaging?

A: TSOT-23-6 is a thin variant of SOT-23-6 with reduced height. Both are mechanically and electrically compatible for surface mount applications. Verify PCB footprint compatibility before selection.

Q: Why do substitute parts require higher minimum supply voltage (2.35V vs. 1.2V)?

A: The substitute parts from Analog Devices Inc. and Linear Technology are optimized for higher performance specifications (faster sampling rates, extended temperature ranges) and operate at higher minimum supply voltages. Applications requiring 1.2V operation must retain the original ADS7866IDBVRG4 or identify alternative architectures.

Q: Which substitute part offers the best performance upgrade?

A: LTC2366HS6#TRMPBF provides the highest sampling rate (3 MSPS), widest operating temperature range (–40°C to +125°C), and active product status with good inventory availability (3,789 pcs).

Q: Are all substitute parts RoHS compliant?

A: Yes, all listed substitute parts are ROHS3 compliant, meeting environmental and regulatory requirements equivalent to the original ADS7866IDBVRG4.

Q: Can I use a substitute part with higher sampling rate in a lower-speed application?

A: Yes. Higher sampling rate capability does not preclude use in lower-speed applications. Configure the device to operate at the required sampling rate through SPI control. Verify power consumption and thermal characteristics remain acceptable for your application.

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