ADS7844NG4 Equivalent & Substitute Parts

Part Overview

The ADS7844NG4 is a 12-bit Analog-to-Digital Converter (ADC) manufactured by Texas Instruments, featuring a Successive Approximation Register (SAR) architecture with 4/8 configurable input channels and SPI data interface. The device supports both differential and single-ended input configurations with external voltage reference capability. The ADS7844NG4 is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

ADS7844NG4

Texas InstrumentsIn Stock: 1450ADS7844NG4 Datasheet

Current PartRFQ

ADS7844N

Texas InstrumentsIn Stock: 10564ADS7844N Datasheet

MFR RecommendedRFQ

MAX147ACAP+

Analog Devices Inc./Maxim IntegratedIn Stock: 2163MAX147ACAP+ Datasheet

MFR RecommendedRFQ

MAX147AEAP+

Analog Devices Inc./Maxim IntegratedIn Stock: 3454MAX147AEAP+ Datasheet

MFR RecommendedRFQ

MAX147BCAP+

Analog Devices Inc./Maxim IntegratedIn Stock: 2249MAX147BCAP+ Datasheet

MFR RecommendedRFQ

MAX147BEAP+

Analog Devices Inc./Maxim IntegratedIn Stock: 2135MAX147BEAP+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ADS7844NG4 is determined by the following critical parameters: 12-bit resolution, SPI digital interface, 4/8 configurable input channels supporting both differential and single-ended modes, SAR architecture, external reference capability, 20-SSOP package form factor, and surface mount mounting type.

The ADS7844N qualifies as a direct substitute, maintaining identical electrical specifications and packaging while offering active product status. The MAX147 series (MAX147ACAP+, MAX147AEAP+, MAX147BCAP+, MAX147BEAP+) provides functional equivalence with the following considerations: these devices support both external and internal voltage reference options, operate across an extended supply voltage range (2.7V ~ 5.25V), and maintain identical resolution, input configuration, data interface, and package specifications. The MAX147 series sampling rate is specified at 133 kSPS, which is lower than the ADS7844NG4's 200 kSPS specification.

Parameter Comparison

Engineering Selection Recommendations

ADS7844N is the primary recommended substitute. This part maintains identical electrical specifications, sampling rate, and supply voltage ranges as the ADS7844NG4 while offering active product status and equivalent packaging. Both devices are manufactured by Texas Instruments and carry ROHS3 compliance. The ADS7844N is suitable for direct replacement in applications requiring the full 200 kSPS sampling rate specification.

MAX147 Series (MAX147ACAP+, MAX147AEAP+, MAX147BCAP+, MAX147BEAP+) provides functional equivalence with design considerations. All MAX147 variants maintain 12-bit resolution, 4/8 input channel configuration, SPI interface, and 20-SSOP packaging. The MAX147 series operates across an extended supply voltage range (2.7V ~ 5.25V) and includes internal reference capability, offering design flexibility. The sampling rate specification of 133 kSPS is lower than the ADS7844NG4. Selection between MAX147 variants depends on operating temperature requirements: MAX147AEAP+ and MAX147BEAP+ support -40°C ~ 85°C operation, matching the ADS7844NG4 temperature range, while MAX147ACAP+ and MAX147BCAP+ are rated for 0°C ~ 70°C. All MAX147 variants carry ROHS3 compliance and superior moisture sensitivity ratings (MSL 1, Unlimited).

Frequently Asked Questions (FAQ)

Q: Can the ADS7844N directly replace the ADS7844NG4?

A: Yes. The ADS7844N is a direct substitute with identical 12-bit resolution, 200 kSPS sampling rate, 4/8 input channel configuration, SPI interface, and 20-SSOP package. Both devices support 2.7V ~ 3.6V and 5V supply operation and -40°C ~ 85°C temperature range. The primary difference is product status: ADS7844N is active while ADS7844NG4 is discontinued.

Q: What is the key difference between the ADS7844NG4 and MAX147 series?

A: The MAX147 series operates at 133 kSPS sampling rate compared to the ADS7844NG4's 200 kSPS. The MAX147 series also supports internal voltage reference in addition to external reference, and operates across a wider supply voltage range (2.7V ~ 5.25V). All other functional parameters—resolution, input configuration, data interface, and package—are equivalent.

Q: Which MAX147 variant should I select?

A: Selection depends on operating temperature requirements. MAX147AEAP+ and MAX147BEAP+ support -40°C ~ 85°C operation, matching the ADS7844NG4 temperature specification. MAX147ACAP+ and MAX147BCAP+ are rated for 0°C ~ 70°C. All variants are ROHS3 compliant with superior moisture sensitivity ratings.

Q: Are all substitute parts available in the same 20-SSOP package?

A: Yes. The ADS7844N and all MAX147 variants (MAX147ACAP+, MAX147AEAP+, MAX147BCAP+, MAX147BEAP+) are packaged in 20-SSOP form factor with surface mount mounting type, ensuring mechanical compatibility with existing PCB designs.

Q: Do the substitute parts maintain RoHS compliance?

A: Yes. The ADS7844N and all MAX147 variants are ROHS3 compliant. The MAX147 series additionally offers superior moisture sensitivity ratings (MSL 1, Unlimited) compared to the ADS7844NG4 (MSL 2, 1 Year).