Part A
ADS7953SBDBTR
Texas Instruments
- Lifecycle
- Active
- Stock
- 6896 PCS
- Package
- TSSOP-38
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS7953SBDBTR and ADS7953SBDBTG4 are functionally equivalent 12-bit, 16-channel SAR ADCs in the same TSSOP-38 package, differing only in the manufacturer's packaging designation (tape-and-reel versus tube/tray). Both share identical electrical, timing, and interface characteristics, making them interchangeable for design and qualification purposes; the choice between them is driven solely by assembly and inventory packaging requirements rather than by any functional or parametric difference.
Resolution and Channel Count
High match
Package Type
High match
Supply Voltage Range
High match
Interface Type
High match
Parts at a glance
Part B
ADS7953SBDBTG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 4855 PCS
- Package
- TFSOP-38
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS7953SBDBTR | ADS7953SBDBTG4 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Determines the quantization step and achievable measurement accuracy; identical resolution means equivalent measurement granularity. |
| Number of Channels | 16 | 16 | Defines how many analog inputs can be multiplexed into the ADC; matching channel count ensures the same system-level input capacity. |
| Sampling Rate | 1 MSPS | 1 MSPS | Sets the maximum conversion throughput; identical rate preserves timing and signal bandwidth capability in the application. |
| Input Type | Single-ended | Single-ended | Determines whether inputs are measured relative to ground or differentially; matching type ensures the same sensor/signal interface works. |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Defines the operating power range; identical supply range allows drop-in use in the same power architecture. |
| Interface | SPI | SPI | Determines the digital communication protocol with the host; matching interface ensures firmware and bus compatibility. |
| Package / Case | TSSOP-38 | TSSOP-38 | Affects PCB footprint and assembly; identical package enables direct board-level substitution. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Defines environmental limits for reliable operation; matching range ensures the same application environments are supported. |
| Mounting Type | Surface Mount | Surface Mount | Determines assembly method; matching mounting type ensures compatibility with the same manufacturing process. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7953SBDBTR | ADS7953SBDBTG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Series | microPOWER™ | microPOWER™ |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 1M | 1M |
| Number of Inputs | 16 | 16 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-S/H-ADC | MUX-S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 1.7V ~ 5.25V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
Frequently asked questions
What is the difference between the ADS7953SBDBTR and the ADS7953SBDBTG4?
The two part numbers refer to the same Texas Instruments ADS7953 device, a 12-bit, 16-channel, 1-MSPS successive-approximation ADC with an SPI-compatible serial interface. The difference is the ordering suffix: the ADS7953SBDBTR is supplied in tape-and-reel packaging, while the ADS7953SBDBTG4 is supplied in tube (rail) packaging. Both use the same TSSOP-38 (DBT) package and are functionally identical.
Are the ADS7953SBDBTR and ADS7953SBDBTG4 electrically and functionally interchangeable?
Yes. Both part numbers share the same die, package (38-pin TSSOP, DBT), pinout, and specified performance. The only difference is the shipping/packaging format (tape-and-reel vs. tube), so they are interchangeable in a design provided the board assembly process accommodates the respective packaging.
What are the key specifications of the ADS7953?
The ADS7953 is a 12-bit SAR ADC with 16 single-ended input channels (or 8 differential pairs), a maximum throughput of 1 MSPS, an SPI-compatible serial interface, and an internal reference. It operates from an analog supply of 2.7 V to 5.25 V and a digital supply of 1.7 V to 5.25 V, and is specified over the -40 °C to +125 °C temperature range. It is housed in a 38-pin TSSOP (DBT) package.
Which package do both parts use, and is it the same?
Both the ADS7953SBDBTR and ADS7953SBDBTG4 use the Texas Instruments DBT package, a 38-pin TSSOP. The package code "DBT" appears in both part numbers, confirming identical package type, pin count, and PCB land pattern.
Does the "G4" suffix indicate a different silicon revision or lead finish?
The "G4" suffix is a Texas Instruments ordering-code convention indicating Green (RoHS-compliant, lead-free) material content. It does not denote a different silicon revision or functional change. Both the ADS7953SBDBTR and ADS7953SBDBTG4 are RoHS-compliant green devices; the suffix difference reflects packaging/ordering conventions rather than device performance.
Which part should be selected for high-volume automated assembly?
For high-volume automated pick-and-place assembly, the ADS7953SBDBTR (tape-and-reel) is generally preferred because tape-and-reel packaging is designed for automated SMT feeders. The ADS7953SBDBTG4 (tube) is typically used for low-volume, prototyping, or manual handling. Selection should be based on the assembly line's feeder and packaging requirements.
Can the ADS7953SBDBTR and ADS7953SBDBTG4 be used in the same PCB design without layout changes?
Yes. Because both parts use the identical 38-pin TSSOP (DBT) package with the same pinout and footprint, no PCB layout changes are required when switching between the two ordering variants. Only the assembly/packaging handling differs.