Part A
ADS7841E
Texas Instruments
- Lifecycle
- Active
- Stock
- 5990 PCS
- Package
- SSOP-16
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS7841E and ADS7841ESG4 are functionally equivalent 12-bit, 4-channel serial ADC devices sharing identical resolution, interface, and supply requirements; the only distinction is the package finish (lead-free/RoHS versus leaded), so the ESG4 variant is a viable functional replacement where RoHS compliance is required, subject to confirming the specific package and finish against the target design.
Resolution and Architecture
High match
Channel Count and Input Type
High match
Digital Interface
High match
Package and Finish
Validation required
Parts at a glance
Part B
ADS7841ESG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 5879 PCS
- Package
- SSOP-16
- Series
- Data Acquisition - Analog to Digital Converters (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 | ADS7841E | ADS7841ESG4 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Determines the smallest analog voltage change the ADC can distinguish; identical resolution means equivalent measurement precision. |
| Number of Channels | 4 (single-ended) / 2 (differential) | 4 (single-ended) / 2 (differential) | Defines how many analog inputs can be measured; matching channel count ensures the same input multiplexing capability. |
| Sampling Rate | 200 kSPS | 200 kSPS | Sets the maximum conversion throughput; identical rate means the same signal bandwidth can be captured. |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | Determines compatibility with the system power rail; matching range allows drop-in use in the same supply environment. |
| Interface Type | SPI (serial) | SPI (serial) | Defines the digital communication protocol; identical interface ensures the same host controller connection works. |
| Input Type | Single-ended / Pseudo-differential | Single-ended / Pseudo-differential | Affects how input signals are referenced and measured; matching input configuration preserves measurement topology. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Defines the environmental limits for reliable operation; identical range means equivalent thermal robustness. |
| Package / Mounting | 16-SSOP (Surface Mount) | 16-SSOP (Surface Mount) | Determines PCB footprint and assembly compatibility; matching package allows the same board layout to be used. |
| Packaging / Ordering Suffix | Tube / Rail | Tape & Reel (G4 green/RoHS variant) | Affects manufacturing handling and RoHS compliance; the G4 suffix denotes a green/RoHS-compliant version, which matters for regulatory and assembly requirements. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7841E | ADS7841ESG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | - | 12 |
| Sampling Rate(Per Second) | - | 200k |
| Number of Inputs | - | 4 |
| Input Type | - | Single Ended |
| Data Interface | - | SPI |
| Configuration | - | MUX-S/H-ADC |
| Ratio - S / H: ADC | - | 1:1 |
| Number of A/D Converters | - | 1 |
| Architecture | - | SAR |
| Reference Type | - | External |
| Voltage - Supply, Analog | - | 2.7V ~ 3.6V, 5V |
| Voltage - Supply, Digital | - | 2.7V ~ 3.6V, 5V |
| Operating Temperature | - | -40°C ~ 125°C |
Frequently asked questions
What is the difference between the ADS7841E and the ADS7841ESG4?
Both devices are 4-channel, 12-bit successive-approximation analog-to-digital converters from Texas Instruments with the same core electrical specifications. The primary difference is the ordering suffix and packaging designation: the ADS7841E is supplied in a 16-pin SSOP (DBQ) package, while the ADS7841ESG4 is supplied in a 16-pin QSOP (DBQ) package and is marked with the "G4" lead-free/RoHS-compliant process designation. Functionally and pin-out wise they are equivalent; the suffix identifies package and environmental compliance variations.
Are the ADS7841E and ADS7841ESG4 pin-compatible?
Yes. Both parts use the same 16-pin SSOP/QSOP footprint with identical pin functions (VREF, +VCC, GND, CH0–CH3, COM, SHDN, CS, DCLK, DIN, DOUT, BUSY, and NC). The pin assignments are the same across both orderable variants, so they can share the same PCB land pattern.
What are the key electrical specifications shared by both devices?
Both are 12-bit SAR ADCs with a 4-channel single-ended or 2-channel differential input multiplexer, a serial SPI/QSPI/Microwire-compatible interface, a sampling rate of up to 200 kSPS, and operation from a single +2.7 V to +5.25 V supply. They feature a 2.5 V to 5.25 V reference input range and are specified for the −40 °C to +85 °C industrial temperature range.
Does the "G4" suffix affect electrical performance?
No. The G4 suffix denotes Texas Instruments' lead-free (Pb-free) and RoHS-compliant package finish and does not change the datasheet electrical characteristics. Both variants meet the same ADC performance specifications; only the package finish and environmental compliance marking differ.
Can the ADS7841ESG4 be used as a drop-in replacement for the ADS7841E?
Yes, provided the design accepts the QSOP package and the lead-free/RoHS process. Because the pin-out, supply range, reference requirements, and serial interface are identical, the ESG4 variant can replace the E variant on the same footprint. Verify the assembly process is compatible with the Pb-free finish before substitution.
What interface do both parts use to communicate with a microcontroller?
Both devices use a 4-wire serial interface compatible with SPI, QSPI, and Microwire protocols, consisting of CS, DCLK, DIN, and DOUT, plus a BUSY output. This allows direct connection to most microcontrollers and DSPs without external glue logic.
What is the maximum sampling rate and resolution of these converters?
Both the ADS7841E and ADS7841ESG4 provide 12-bit resolution with a maximum throughput of 200 kSPS when operated within the specified supply and reference conditions. Resolution and throughput are identical between the two orderable variants.
Which package options distinguish the two orderable part numbers?
The ADS7841E is offered in a 16-pin SSOP (DBQ) package, and the ADS7841ESG4 is offered in a 16-pin QSOP (DBQ) package with the G4 lead-free designation. Both are surface-mount packages with the same pin count and pin functions, differing only in package body style and environmental marking.