Request Quote
(Ships tomorrow)
ADS8509IBDBR Equivalent & Substitute Parts
Part Overview
The ADS8509IBDBR is a 16-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for single-ended input applications with a 250 kSPS sampling rate and SPI data interface. This component is classified as discontinued at DiGi Electronics, making identification of functionally equivalent alternatives essential for ongoing design support and procurement planning. The part operates on 5V supply for both analog and digital domains and employs a successive approximation register (SAR) architecture with integrated sample-and-hold functionality.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resolution (Bits) | 16 |
| Sampling Rate (kSPS) | 250 |
| Number of Inputs | 1 |
| Input Type | Single Ended |
| Data Interface | SPI |
| Architecture | SAR |
| Reference Type | External, Internal |
| Voltage - Supply, Analog | 5V |
| Voltage - Supply, Digital | 5V |
| Package / Case | 28-SSOP (0.209", 5.30mm Width) |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
Substitution eligibility for the ADS8509IBDBR is determined by strict alignment of the following critical parameters:
- Resolution: 16-bit ADC architecture
- Input Configuration: Single-ended input, 1 channel
- Data Interface: SPI protocol compatibility
- Package: 28-SSOP form factor with identical pin pitch (0.209", 5.30mm width)
- Supply Voltage: 5V analog and digital supply rails
- Architecture: SAR-based conversion with integrated S/H-ADC configuration (1:1 ratio)
- Reference Options: External and internal reference support
The LTC1609CG#PBF from Analog Devices Inc. meets all mandatory substitution criteria. While the sampling rate differs (200 kSPS versus 250 kSPS), this represents a functional reduction rather than incompatibility, as the substitute operates within the same architectural framework and maintains full pin and protocol compatibility.
Parameter Comparison
| Parameter | ADS8509IBDBR (TI) | LTC1609CG#PBF (ADI) | Compatibility |
|---|---|---|---|
| Resolution (Bits) | 16 | 16 | Match |
| Sampling Rate (kSPS) | 250 | 200 | Substitute Lower |
| Number of Inputs | 1 | 1 | Match |
| Input Type | Single Ended | Single Ended | Match |
| Data Interface | SPI | SPI | Match |
| Architecture | SAR | SAR | Match |
| Reference Type | External, Internal | External, Internal | Match |
| Voltage - Supply, Analog | 5V | 5V | Match |
| Voltage - Supply, Digital | 5V | 5V | Match |
| Package / Case | 28-SSOP (0.209", 5.30mm Width) | 28-SSOP (0.209", 5.30mm Width) | Match |
| Operating Temperature | -40°C ~ 85°C | 0°C ~ 70°C | Substitute Narrower |
| Mounting Type | Surface Mount | Surface Mount | Match |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Match |
| REACH Status | REACH Unaffected | REACH Unaffected | Match |
Engineering Selection Recommendations
The LTC1609CG#PBF is the manufacturer-recommended substitute for the discontinued ADS8509IBDBR. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and legacy system support.
Selection between these parts depends on application-specific requirements:
-
ADS8509IBDBR: Use for applications requiring extended temperature operation (-40°C to 85°C) and maximum sampling throughput (250 kSPS). This part is discontinued and available only through existing inventory channels.
-
LTC1609CG#PBF: Use for applications operating within the 0°C to 70°C temperature range where 200 kSPS sampling rate is sufficient. This part is active and available through standard distribution channels with established supply continuity.
Both parts are pin-compatible and require identical PCB footprints. No circuit redesign is necessary for substitution within the specified operating parameters.
Frequently Asked Questions (FAQ)
Q: Can the LTC1609CG#PBF directly replace the ADS8509IBDBR on existing PCBs?
A: Yes. Both components use the 28-SSOP package with identical pin pitch and pinout. No PCB modifications are required for mechanical or electrical substitution.
Q: What is the impact of the 50 kSPS sampling rate reduction?
A: The LTC1609CG#PBF operates at 200 kSPS versus the ADS8509IBDBR's 250 kSPS. This represents a 20% reduction in maximum conversion rate. Applications requiring higher throughput must retain the original part or select alternative architectures.
Q: Are there temperature range limitations with the substitute?
A: Yes. The LTC1609CG#PBF operates from 0°C to 70°C, compared to the ADS8509IBDBR's -40°C to 85°C range. Applications requiring extended temperature operation must use the original part or select temperature-rated alternatives.
Q: Do both parts support the same reference configurations?
A: Yes. Both the ADS8509IBDBR and LTC1609CG#PBF support external and internal reference options, maintaining identical reference flexibility.
Q: What is the moisture sensitivity difference?
A: The ADS8509IBDBR has MSL 2 (1 Year), while the LTC1609CG#PBF has MSL 1 (Unlimited). The substitute offers superior moisture tolerance for storage and handling.
Q: Are regulatory certifications equivalent?
A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting identical regulatory requirements for commercial and industrial applications.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts