Request Quote
(Ships tomorrow)
ADS7804PB Equivalent & Substitute Parts
Part Overview
The ADS7804PB is a 12-bit Analog to Digital Converter manufactured by Texas Instruments, designed for single-ended input data acquisition applications. This device features a Successive Approximation Register (SAR) architecture with a 100 kSPS sampling rate and operates from a 5V supply in a 28-pin DIP package for through-hole mounting.
The ADS7804PB is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this ADC.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resolution (Bits) | 12 |
| Sampling Rate | 100 kSPS |
| Number of Inputs | 1 |
| Input Type | Single Ended |
| Data Interface | Parallel |
| Architecture | SAR |
| Reference Type | External, Internal |
| Analog Supply Voltage | 5V |
| Digital Supply Voltage | 5V |
| Operating Temperature Range | -40°C to 85°C |
| Package Type | 28-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole |
Substitute Part Grouping Explanation
Substitution of the ADS7804PB is determined by the following core electrical and mechanical parameters:
- Resolution: 12-bit ADC capability
- Input Configuration: Single-ended input, 1 channel
- Data Interface: Parallel output
- Architecture: SAR-based conversion
- Reference Support: External and internal reference capability
- Supply Voltages: 5V analog and digital supplies
- Operating Temperature: -40°C to 85°C range
- Functional Equivalence: S/H-ADC configuration with 1:1 ratio
The ADS8504IBDW meets all core electrical requirements for substitution. While this part operates at a higher sampling rate (250 kSPS versus 100 kSPS), this represents an enhancement rather than a limitation. The primary difference is the package format: the substitute uses 28-SOIC surface-mount packaging instead of the original 28-DIP through-hole format, requiring PCB redesign considerations.
Parameter Comparison
| Parameter | ADS7804PB (Original) | ADS8504IBDW (Substitute) |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Resolution (Bits) | 12 | 12 |
| Sampling Rate (kSPS) | 100 | 250 |
| Number of Inputs | 1 | 1 |
| Input Type | Single Ended | Single Ended |
| Data Interface | Parallel | Parallel |
| Architecture | SAR | SAR |
| Reference Type | External, Internal | External, Internal |
| Analog Supply Voltage | 5V | 5V |
| Digital Supply Voltage | 5V | 5V |
| Operating Temperature Range | -40°C to 85°C | -40°C to 85°C |
| Package Type | 28-DIP (0.300", 7.62mm) | 28-SOIC (0.295", 7.50mm) |
| Mounting Type | Through Hole | Surface Mount |
| Product Status | Obsolete | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
The ADS8504IBDW is the manufacturer-recommended substitute for the ADS7804PB. Both devices maintain identical electrical specifications for 12-bit resolution, single-ended input configuration, parallel data interface, and 5V supply operation across the -40°C to 85°C temperature range.
The ADS8504IBDW offers the advantage of active product status, ensuring ongoing availability and support from Texas Instruments. Both parts maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements.
The primary design consideration is the transition from through-hole DIP packaging to surface-mount SOIC packaging. This substitution requires PCB layout modification and updated assembly processes. The enhanced sampling rate of 250 kSPS in the substitute part provides performance headroom for applications originally designed around the 100 kSPS specification.
Frequently Asked Questions (FAQ)
Q: Can the ADS8504IBDW directly replace the ADS7804PB without circuit modifications?
A: Electrical substitution is direct; however, the package format differs. The ADS7804PB uses 28-DIP through-hole mounting, while the ADS8504IBDW uses 28-SOIC surface-mount. PCB redesign is required to accommodate the different package footprint and mounting method.
Q: What is the impact of the higher sampling rate in the ADS8504IBDW?
A: The ADS8504IBDW operates at 250 kSPS compared to the ADS7804PB's 100 kSPS. This represents enhanced performance and does not create compatibility issues. Applications designed for 100 kSPS operation will function correctly with the faster sampling rate.
Q: Are the pin configurations identical between these parts?
A: Both devices use 28-pin packages with identical pin assignments for signal and power connections. The difference is the physical package format: DIP versus SOIC.
Q: Why is the ADS7804PB classified as obsolete?
A: The ADS7804PB has reached end-of-life status from Texas Instruments. The ADS8504IBDW represents the active product line continuation with equivalent electrical functionality and improved availability.
Q: Do both parts support the same reference voltage options?
A: Yes. Both the ADS7804PB and ADS8504IBDW support external and internal reference configurations, maintaining identical reference flexibility.
Q: What are the compliance differences between these parts?
A: Both parts are ROHS3 compliant and REACH unaffected. Compliance status is equivalent between the original and substitute part.
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