Part A
ADS7828EIPWRQ1
德州儀器
- Lifecycle
- Active
- Stock
- 5341 件
- Package
- TSSOP-16
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Compatible functional replacement candidate
The ADS7828EIPWRQ1 and ADS7828E/250G4 are functionally equivalent 12-bit, 8-channel SAR ADCs sharing the same resolution, channel count, I2C interface, and TSSOP-16 footprint, making them viable substitutes in most designs. The primary distinction is qualification grade: the Q1 variant is AEC-Q100 automotive-qualified, while the /250G4 is an industrial-grade device. Designers should confirm the target application's qualification requirements and verify the exact orderable part suffix before substitution.
Resolution and Channel Count
High match
Interface Type
High match
Package and Pinout
High match
Qualification Grade
Validation required
Parts at a glance
Part B
ADS7828E/250G4
德州儀器
- Lifecycle
- Active
- Stock
- 6166 件
- Package
- TSSOP-16
- 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 | ADS7828EIPWRQ1 | ADS7828E/250G4 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Both converters provide the same measurement resolution, so accuracy class is equivalent. |
| Number of Input Channels | 8 (single-ended) / 4 (pseudo-differential) | 8 (single-ended) / 4 (pseudo-differential) | Channel count determines how many signals can be multiplexed into the ADC without external switching. |
| Sampling Rate | 50 kSPS | 50 kSPS | Throughput must meet the system's signal bandwidth and update-rate requirements. |
| Interface Type | I2C (2-wire) | I2C (2-wire) | The digital interface must match the host bus to allow direct communication. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Supply range must be compatible with the system rail to avoid level shifting or damage. |
| Reference Type | Internal (2.5 V) or external | Internal (2.5 V) or external | Reference configuration affects full-scale input range and measurement stability. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment for reliable operation. |
| Package / Pin Count | TSSOP-16 | TSSOP-16 | Package and pinout must match the PCB footprint for drop-in substitution. |
| Qualification / Grade | Automotive AEC-Q100 qualified | Industrial grade | Automotive qualification affects reliability screening and suitability for automotive applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7828EIPWRQ1 | ADS7828E/250G4 |
|---|---|---|
| Supplier | - | Texas Instruments,Rochester Electronics, LLC |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 50k | 50k |
| Number of Inputs | 8 | 8 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | I²C | I²C |
| 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, Internal | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 3.6V, 5V | 2.7V ~ 3.6V, 5V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V, 5V | 2.7V ~ 3.6V, 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Series | Automotive, AEC-Q100 | - |
Frequently asked questions
What are the key differences between the ADS7828EIPWRQ1 and the ADS7828E/250G4?
The ADS7828EIPWRQ1 is an automotive-qualified device (AEC-Q100 Grade 1, -40°C to +125°C) supplied in a TSSOP-16 package and marked with the Q1 automotive suffix, while the ADS7828E/250G4 is the industrial-grade version supplied in a TSSOP-16 package with a -40°C to +85°C operating range. Both are 12-bit, 8-channel, I2C-compatible SAR ADCs with an internal reference and on-chip sample-and-hold, but the Q1 variant is qualified for automotive use.
Are the ADS7828EIPWRQ1 and ADS7828E/250G4 functionally interchangeable?
Both devices share the same core ADC architecture: 12-bit resolution, 8 single-ended or 4 differential input channels, I2C interface, internal 2.5 V reference, and 50 kSPS sampling rate. However, the Q1 variant is automotive-qualified and specified over a wider temperature range, so substitution should be validated against the target application's qualification and temperature requirements rather than assumed solely on functional similarity.
What is the resolution and sampling rate of these ADCs?
Both the ADS7828EIPWRQ1 and ADS7828E/250G4 are 12-bit successive-approximation register (SAR) analog-to-digital converters with a maximum sampling rate of 50 kSPS. They provide 8 single-ended inputs or 4 differential input pairs, selectable via the I2C command byte.
What supply voltage and reference configuration do these devices use?
Both devices operate from a single 2.7 V to 5.5 V supply and include an internal 2.5 V reference, with the option to use an external reference. The analog input range is 0 V to VREF, and the I2C interface supports standard, fast, and high-speed modes up to 3.4 MHz.
What package and pinout do the ADS7828EIPWRQ1 and ADS7828E/250G4 use?
Both parts are offered in a 16-pin TSSOP package (PW suffix) with identical pin functions, including SDA, SCL, A0-A2 address pins, VDD, GND, VREF, and the analog input channels. The identical pinout and package footprint allow PCB-level compatibility, subject to qualification and temperature-grade differences.
What are the operating temperature ranges for each variant?
The ADS7828EIPWRQ1 is qualified to AEC-Q100 Grade 1 with an operating temperature range of -40°C to +125°C, suitable for automotive environments. The ADS7828E/250G4 is specified for -40°C to +85°C, typical of industrial applications. Designs requiring operation above +85°C should use the Q1 variant.
How is the I2C address configured on these devices?
Both devices use three address pins (A0, A1, A2) to set the 7-bit I2C slave address, allowing up to eight devices to share a single bus. The address pins are strapped to VDD or GND to select one of eight possible addresses, and the same addressing scheme applies to both the ADS7828EIPWRQ1 and ADS7828E/250G4.
Which variant should be selected for automotive versus industrial designs?
For automotive applications requiring AEC-Q100 qualification and operation up to +125°C, the ADS7828EIPWRQ1 is the appropriate choice. For industrial or general-purpose designs operating within -40°C to +85°C, the ADS7828E/250G4 is suitable. Selection should be based on the end application's qualification, temperature, and reliability requirements.