Part A
ADS7959QDBTRQ1
德州儀器
- Lifecycle
- Active
- Stock
- 6120 件
- Package
- TSSOP-30
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS7959QDBTRQ1 and ADS7952SBDBTG4 are both 12-bit, multi-channel SAR ADCs from the ADS79xx family in TSSOP-38 packages, sharing the same SPI interface and reference architecture, so they can serve as functional replacement candidates. However, they differ in channel count and sample rate, and the ADS7959QDBTRQ1 carries automotive Q1 qualification while the ADS7952SBDBTG4 does not, so the substitution must be validated against the system's channel count, throughput, and qualification requirements before adoption.
Resolution
High match
Channel Count
Validation required
Sample Rate
Validation required
Qualification Grade
Validation required
Parts at a glance
Part B
ADS7952SBDBTG4
德州儀器
- Lifecycle
- Active
- Stock
- 3680 件
- Package
- TFSOP-38
- Series
- 資料獲取-模數轉換器（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 | ADS7959QDBTRQ1 | ADS7952SBDBTG4 | Why it matters |
|---|---|---|---|
| Resolution | 8 bit | 12 bit | Resolution determines the smallest analog voltage change the ADC can distinguish; a 12-bit device offers 16x finer quantization than an 8-bit device, directly affecting measurement accuracy. |
| Number of Input Channels | 8 single-ended | 12 single-ended | Channel count defines how many analog signals can be multiplexed into the ADC; a system needing more than 8 inputs cannot use the 8-channel part without external multiplexing. |
| Sampling Rate | 1 MSPS | 1 MSPS | Maximum sample rate sets the bandwidth of signals that can be digitized; both parts share the same throughput, so timing budgets are compatible. |
| Supply Voltage (Analog) | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Analog supply range must match the system rail; identical ranges mean the same power supply design can be reused. |
| Interface Type | SPI (serial) | SPI (serial) | The digital interface must be compatible with the host controller; both use SPI, so firmware and pin connections are largely interchangeable. |
| Package | TSSOP-30 (DBT) | TSSOP-30 (DBT) | Package footprint and pinout determine PCB layout compatibility; identical packages allow drop-in replacement without board redesign. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Temperature range must cover the application environment; matching ranges ensure equivalent reliability in automotive and industrial conditions. |
| Input Type | Single-ended | Single-ended | Single-ended versus differential input affects signal conditioning and noise immunity; both being single-ended means the same front-end circuitry applies. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7959QDBTRQ1 | ADS7952SBDBTG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Series | Automotive, AEC-Q100 | microPOWER™ |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 8 | 12 |
| Sampling Rate(Per Second) | 1M | 1M |
| Number of Inputs | 8 | 12 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-PGA-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 | 1.7V ~ 5.25V | 1.7V ~ 5.25V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Features | PGA | - |
Frequently asked questions
What are the key differences between the ADS7959QDBTRQ1 and the ADS7952SBDBTG4?
The ADS7959QDBTRQ1 is an automotive-qualified (AEC-Q100 Grade 1) 8-channel, 12-bit SAR ADC with a 1 MSPS maximum throughput, specified over the -40°C to +125°C temperature range. The ADS7952SBDBTG4 is a 12-channel, 12-bit SAR ADC with a 1 MSPS maximum throughput, specified over the -40°C to +125°C temperature range but without automotive qualification. The primary differences are channel count (8 vs 12) and qualification grade (automotive Q1 vs industrial G4).
Are the ADS7959QDBTRQ1 and ADS7952SBDBTG4 pin-compatible?
No. Both devices are offered in a 38-pin TSSOP (DBT) package, but the ADS7959QDBTRQ1 provides 8 analog input channels while the ADS7952SBDBTG4 provides 12 analog input channels, so the pin assignments for the analog inputs and associated control pins differ. A direct drop-in replacement is not possible without verifying the pinout against the respective datasheets.
Do both ADCs support the same serial interface?
Yes. Both the ADS7959QDBTRQ1 and ADS7952SBDBTG4 use a SPI-compatible serial interface for communication with a host controller, supporting standard SPI modes for configuration and conversion data readback.
What is the maximum sampling rate of each device?
Both the ADS7959QDBTRQ1 and the ADS7952SBDBTG4 are specified for a maximum throughput of 1 MSPS (1 megasample per second) at 12-bit resolution.
Is the ADS7959QDBTRQ1 suitable for automotive applications while the ADS7952SBDBTG4 is not?
The ADS7959QDBTRQ1 carries the Q1 designation, indicating AEC-Q100 qualification for automotive use. The ADS7952SBDBTG4 does not carry an automotive qualification suffix and is intended for industrial/general-purpose applications. Designers should confirm the specific qualification grade required by their end application against the manufacturer datasheet.
What is the analog input configuration of each device?
The ADS7959QDBTRQ1 provides 8 analog input channels, while the ADS7952SBDBTG4 provides 12 analog input channels. Both are 12-bit successive-approximation-register (SAR) ADCs. Designers should refer to the respective datasheets for the exact input multiplexer configuration and single-ended/differential options.
Can the ADS7952SBDBTG4 be used as a substitute for the ADS7959QDBTRQ1 in an existing design?
Not as a direct drop-in substitute. Although both are 12-bit, 1 MSPS SAR ADCs in a 38-pin TSSOP package, they differ in channel count (12 vs 8) and qualification grade (G4 vs Q1). Substitution requires verifying pinout, channel mapping, and qualification requirements against the target design and manufacturer documentation.