Part A
ADS7844EB
텍사스 인스트루먼트(주)
- Lifecycle
- Active
- Stock
- 3681 PCS
- Package
- SSOP-20
- Series
- 데이터 수집 - 아날로그 변환기(ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS7844EB and ADS7844E/2K5G4 are functionally equivalent 12-bit 8-channel serial ADC devices sharing identical resolution, channel count, interface, and package configuration, making them suitable as a direct functional replacement candidate. The primary distinction lies in packaging format and ordering quantity, so buyers should confirm reel or tube packaging requirements and verify availability against their production needs before substitution.
Resolution and Channel Count
High match
Interface Type
High match
Package Type
High match
Packaging and Ordering Format
Validation required
Parts at a glance
Part B
ADS7844E/2K5G4
텍사스 인스트루먼트(주)
- Lifecycle
- Active
- Stock
- 2200 PCS
- Package
- SSOP-20
- Series
- 데이터 수집 - 아날로그 변환기(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 | ADS7844EB | ADS7844E/2K5G4 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Determines the smallest analog signal change the ADC can distinguish; identical resolution means equivalent measurement granularity. |
| Number of Channels | 8 (single-ended) / 4 (differential) | 8 (single-ended) / 4 (differential) | Defines how many analog inputs can be multiplexed into the converter; matching channel count ensures the same system-level input capability. |
| Sampling Rate | 200 kSPS | 200 kSPS | Sets the maximum conversion throughput; identical rates mean the same signal bandwidth and timing budget can be supported. |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Determines compatibility with the system power rail; matching ranges allow drop-in use in the same supply environment. |
| Interface Type | SPI (serial) | SPI (serial) | Defines the digital communication protocol with the host; identical interface ensures firmware and pin-level compatibility. |
| Package / Mounting | 20-SSOP (surface mount) | 20-SSOP (surface mount) | Affects PCB footprint and assembly; matching package allows the same board layout to be reused. |
| Packaging / Ordering Format | Tube / individual | Tape & Reel (2,500 units) | Distinguishes how parts are supplied for manufacturing; reel packaging suits automated high-volume assembly while tube suits prototyping or low-volume runs. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Defines the environmental envelope for reliable operation; identical ranges mean equivalent thermal robustness in the application. |
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 | ADS7844EB | ADS7844E/2K5G4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 200k | 200k |
| Number of Inputs | 4, 8 | 4, 8 |
| Input Type | Differential, Single Ended | Differential, 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 ~ 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 |
Frequently asked questions
What are the key differences between the ADS7844EB and the ADS7844E/2K5G4?
Both parts are the same ADS7844 12-bit, 8-channel serial ADC from Texas Instruments. The ADS7844EB is supplied in a 20-pin SSOP package (DB) in tube/rail format, while the ADS7844E/2K5G4 is the same die in the same 20-pin SSOP package but supplied in tape-and-reel packaging (2K5 = 2500 units per reel) and marked with the G4 lead-free/RoHS-compliant designation. Functionally and electrically they are identical; the differences are packaging, ordering quantity, and RoHS/lead-free status.
Are the ADS7844EB and ADS7844E/2K5G4 electrically and functionally interchangeable?
Yes. Both are the same ADS7844 device: 12-bit SAR ADC, 8 single-ended or 4 differential inputs, 4-wire SPI/QSPI/Microwire-compatible serial interface, 2.7 V to 5.25 V supply, and up to 200 kSPS throughput. Because the silicon is identical, they are interchangeable in circuit design; only the packaging format and RoHS marking differ.
Do the ADS7844EB and ADS7844E/2K5G4 use the same package and pinout?
Yes. Both are offered in the 20-pin SSOP (DB) package with the same pinout, so the PCB land pattern and pin functions are identical. The EB suffix denotes the SSOP package in tube form, and the E/2K5G4 suffix denotes the same SSOP package in tape-and-reel with the G4 lead-free designation.
What does the G4 suffix on the ADS7844E/2K5G4 indicate?
The G4 suffix is Texas Instruments' designation for lead-free (Pb-free) and RoHS-compliant construction. The ADS7844EB is the standard (non-G4) ordering code. Designs requiring RoHS compliance should specify the G4 variant; otherwise the two are functionally equivalent.
What is the difference in ordering quantity between the two part numbers?
The ADS7844EB is supplied in tube/rail packaging, typically in smaller quantities per container. The ADS7844E/2K5G4 is supplied on tape-and-reel with 2,500 units per reel (the "2K5" denotes 2500). The choice depends on production volume and whether automated pick-and-place reel feeding is required.
Can the ADS7844EB be replaced by the ADS7844E/2K5G4 in an existing design?
Yes, from an electrical and footprint standpoint, since both share the same die, package, and pinout. The only considerations are the packaging format (tube vs. tape-and-reel) and the RoHS/lead-free status (G4). If the assembly process and compliance requirements accept the G4 lead-free part, the substitution is direct.
What are the shared key specifications of the ADS7844EB and ADS7844E/2K5G4?
Both are 12-bit successive-approximation ADCs with 8 single-ended or 4 differential input channels, a 4-wire serial interface compatible with SPI/QSPI/Microwire, a supply range of 2.7 V to 5.25 V, and throughput up to 200 kSPS. These parameters are common to both ordering codes because they are the same device.