ADC08832IM Equivalent & Substitute Parts

Part Overview

The ADC08832IM is an 8-bit successive approximation register (SAR) analog-to-digital converter manufactured by Texas Instruments, designed for data acquisition applications requiring dual-channel input processing. This device operates with supply voltages between 4.5V and 6V and achieves a sampling rate of 250 kSPS. The ADC08832IM is classified as obsolete, making equivalent and substitute parts necessary for new designs, production continuity, and system upgrades where active component support is required.

Key Parameters

Parameter	Value
Resolution	8 Bit
Sampling Rate	250 kSPS
Number of Inputs	2
Input Type	Differential, Pseudo-Differential, Single Ended
Data Interface	SPI, DSP
Architecture	SAR
Voltage Supply (Analog)	4.5V ~ 6V
Voltage Supply (Digital)	4.5V ~ 6V
Operating Temperature	-40°C ~ 85°C
Package	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the ADC08832IM is determined by the following critical parameters: 8-bit resolution, 8-SOIC package compatibility, SPI/DSP data interface support, and operating temperature range. The substitute parts are grouped into two categories based on functional compatibility:

Category 1: Direct Functional Equivalent ADC08832IM/NOPB (Texas Instruments) maintains identical electrical specifications and packaging. This part differs only in product status (Active vs. Obsolete) and RoHS compliance level, making it a direct replacement.

Category 2: Functional Substitutes with Parameter Variations LTC1098 series (Analog Devices Inc.) and LTC1198 series (Analog Devices Inc.) provide 8-bit SAR ADC functionality in 8-SOIC packaging with SPI interface support. These parts accept substitution based on the following allowed variations:

Sampling rate: LTC1098 series operates at 33 kSPS; LTC1198 series operates at 750 kSPS
Supply voltage range: LTC1098 series supports 3V ~ 6V; LTC1198 series supports 2.7V ~ 6V
Reference type: LTC1098/LTC1198 series use external reference vs. supply reference
Operating temperature: LTC1098/LTC1198 (commercial grade) operate 0°C ~ 70°C; LTC1098IS8 operates -40°C ~ 85°C
Number of inputs: LTC1098/LTC1198 support 1 or 2 inputs
Input type: LTC1098/LTC1198 support Differential and Single Ended (no Pseudo-Differential)

Parameter Comparison

Part Number	Manufacturer	Resolution (Bit)	Sampling Rate (kSPS)	Number of Inputs	Data Interface	Supply Voltage (V)	Operating Temp (°C)	Package	Product Status	RoHS Status
ADC08832IM	Texas Instruments	8	250	2	SPI, DSP	4.5 ~ 6	-40 ~ 85	8-SOIC	Obsolete	RoHS non-compliant
ADC08832IM/NOPB	Texas Instruments	8	250	2	SPI, DSP	4.5 ~ 6	-40 ~ 85	8-SOIC	Active	ROHS3 Compliant
LTC1098ACS8#PBF	Analog Devices Inc.	8	33	1, 2	SPI	3 ~ 6	0 ~ 70	8-SOIC	Active	ROHS3 Compliant
LTC1098ACS8#TRPBF	Analog Devices Inc.	8	33	1, 2	SPI	3 ~ 6	0 ~ 70	8-SOIC	Active	ROHS3 Compliant
LTC1098CS8#PBF	Analog Devices Inc.	8	33	1, 2	SPI	3 ~ 6	0 ~ 70	8-SOIC	Active	ROHS3 Compliant
LTC1098CS8#TRPBF	Analog Devices Inc.	8	33	1, 2	SPI	3 ~ 6	0 ~ 70	8-SOIC	Active	ROHS3 Compliant
LTC1098IS8#PBF	Linear Technology	8	33	1, 2	Parallel, SPI	3 ~ 6	-40 ~ 85	8-SOIC	Obsolete	RoHS non-compliant
LTC1098IS8#TRPBF	Analog Devices Inc.	8	33	1, 2	SPI	3 ~ 6	-40 ~ 85	8-SOIC	Active	ROHS3 Compliant
LTC1198-1ACS8#PBF	Analog Devices Inc.	8	750	1, 2	SPI	2.7 ~ 6	0 ~ 70	8-SOIC	Active	ROHS3 Compliant
LTC1198-1ACS8#TRPBF	Analog Devices Inc.	8	750	1, 2	SPI	2.7 ~ 6	0 ~ 70	8-SOIC	Active	ROHS3 Compliant
LTC1198-1BCS8#PBF	Linear Technology	8	750	1, 2	SPI	2.7 ~ 6	0 ~ 70	8-SOIC	Active	Not specified

Engineering Selection Recommendations

For Direct Replacement (No Design Changes Required) ADC08832IM/NOPB is the primary equivalent. This part maintains 100% electrical and mechanical compatibility with the original ADC08832IM while offering Active product status and ROHS3 compliance. Selection of this part eliminates design verification requirements.

For Extended Temperature Range Applications (-40°C to 85°C) When operating temperature range of -40°C to 85°C is required, ADC08832IM/NOPB or LTC1098IS8#TRPBF are the only qualified substitutes. LTC1098IS8#TRPBF provides Active status and ROHS3 compliance but operates at 33 kSPS sampling rate and requires external reference configuration.

For Commercial Temperature Range Applications (0°C to 70°C) LTC1098 series (LTC1098ACS8#PBF, LTC1098ACS8#TRPBF, LTC1098CS8#PBF, LTC1098CS8#TRPBF) and LTC1198 series (LTC1198-1ACS8#PBF, LTC1198-1ACS8#TRPBF, LTC1198-1BCS8#PBF) are qualified substitutes. All parts in this group carry Active product status and ROHS3 compliance. LTC1198 series provides higher sampling rate (750 kSPS) and lower minimum supply voltage (2.7V).

For RoHS Compliance Requirements All substitute parts except LTC1098IS8#PBF carry ROHS3 compliance certification. ADC08832IM/NOPB is the only direct equivalent with RoHS compliance.

Frequently Asked Questions (FAQ)

Q: Can LTC1098 series parts directly replace ADC08832IM in existing designs? A: LTC1098 series parts are functionally compatible but require design verification. Key differences include lower sampling rate (33 kSPS vs. 250 kSPS), external reference requirement, and narrower operating temperature range (0°C to 70°C vs. -40°C to 85°C). Firmware or software modifications may be necessary to accommodate the reduced sampling rate and different reference configuration.

Q: What is the difference between tube and tape & reel packaging options? A: Tube packaging (suffix #PBF) is suitable for manual assembly and lower-volume applications. Tape & Reel packaging (suffix #TRPBF) is designed for automated pick-and-place assembly and higher-volume production. Electrical specifications are identical; selection depends on assembly process requirements.

Q: Are LTC1198 series parts suitable for applications requiring 250 kSPS sampling rate? A: LTC1198 series parts operate at 750 kSPS, which exceeds the 250 kSPS requirement of ADC08832IM. This higher sampling rate does not prevent substitution but may require firmware adjustment to configure the device for the required effective sampling rate. The higher capability provides design flexibility for future performance enhancements.

Q: What is the impact of external reference requirement in LTC1098/LTC1198 series? A: ADC08832IM uses supply voltage as reference, while LTC1098/LTC1198 series require external reference configuration. This requires additional circuit design for reference voltage generation and filtering. The external reference approach provides improved accuracy and noise performance in applications where reference stability is critical.

Q: Can LTC1098IS8#PBF be used in new designs? A: LTC1098IS8#PBF is classified as Obsolete and carries RoHS non-compliant status. This part is not recommended for new designs. LTC1098IS8#TRPBF (Active, ROHS3 Compliant) is the preferred alternative if extended temperature range (-40°C to 85°C) and 33 kSPS sampling rate are required.

Q: What supply voltage range must be maintained for successful substitution? A: ADC08832IM operates at 4.5V to 6V. LTC1098 series supports 3V to 6V, and LTC1198 series supports 2.7V to 6V. All substitute parts accept the 4.5V to 6V supply range of the original device. If supply voltage is below 4.5V, only LTC1098 or LTC1198 series parts are suitable.

Q: Are pseudo-differential inputs supported by substitute parts? A: ADC08832IM supports Differential, Pseudo-Differential, and Single Ended input types. LTC1098 and LTC1198 series support only Differential and Single Ended inputs. Applications requiring pseudo-differential input configuration must use ADC08832IM or ADC08832IM/NOPB.

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