Part A
ADS8344E
Texas Instruments
- Lifecycle
- Active
- Stock
- 2647 PCS
- Package
- SSOP-20
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The ADS8344E and ADS830EG4 are not functionally interchangeable: the ADS8344E is a 4-channel, 16-bit successive-approximation ADC with a serial SPI/QSPI interface, while the ADS830EG4 is a single-channel, 8-bit pipelined ADC with a parallel output interface. They differ in resolution, channel count, output interface, and package, so the ADS830EG4 cannot directly replace the ADS8344E in existing designs.
Different resolution
Different channel count
Different output interface
Different package
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS8344E | ADS830EG4 | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 8 bit | Resolution determines the smallest signal change the ADC can distinguish; a 16-bit part offers far finer quantization than an 8-bit part, so they are not functionally interchangeable in precision applications. |
| Sampling Rate | 100 kSPS | 60 MSPS | Maximum sample rate defines the bandwidth of signals the converter can digitize; the ADS830 is orders of magnitude faster, targeting high-speed acquisition while the ADS8344 targets slower precision measurement. |
| Number of Input Channels | 4 single-ended / 2 differential | 1 single-ended | Channel count determines how many signals can be multiplexed into one converter; the multi-channel ADS8344 suits multi-sensor systems, whereas the single-channel ADS830 suits one high-speed signal path. |
| Input Type | Single-ended or differential (multiplexed) | Single-ended | Differential inputs improve noise immunity and common-mode rejection; the ADS8344 supports both configurations while the ADS830 is fixed single-ended, affecting signal-chain design. |
| Interface | SPI / serial | Parallel | The digital interface must match the host controller; a serial SPI device and a parallel-output device require different pin counts and firmware, preventing drop-in substitution. |
| Supply Voltage | 2.7 V to 5.25 V | 5 V (single supply) | Supply range affects compatibility with low-voltage logic and portable designs; the wide-range ADS8344 can run from 3.3 V rails while the ADS830 requires a 5 V supply. |
| Package | 20-pin SSOP | 20-pin SSOP | Package and pinout determine board footprint and layout compatibility; matching packages ease layout reuse but pin functions still differ between these parts. |
| Typical Application Focus | Precision multi-channel data acquisition | High-speed signal digitization | The intended application domain reflects the underlying architecture; precision SAR converters and high-speed pipeline converters serve fundamentally different roles and are rarely substitutable. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS8344E | ADS830EG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 8 |
| Sampling Rate(Per Second) | 100k | 60M |
| Number of Inputs | 4, 8 | 1 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | SPI | Parallel |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | Pipelined |
| Reference Type | External | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 3.6V, 5V | 5V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V, 5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the primary functional differences between the ADS8344E and ADS830EG4?
The ADS8344E is a 16-bit, 8-channel successive-approximation register (SAR) analog-to-digital converter (ADC) with a serial SPI/QSPI interface, operating from a single 2.7 V to 5 V supply. The ADS830EG4 is an 8-bit, 60 MSPS pipelined ADC with a parallel output interface, designed for high-speed signal conversion and typically operating from a 5 V supply. They differ fundamentally in resolution, architecture, channel count, and interface type.
Can the ADS8344E and ADS830EG4 be used interchangeably in a design?
No. The ADS8344E is a 16-bit multi-channel SAR ADC with a serial interface, while the ADS830EG4 is an 8-bit high-speed pipelined ADC with a parallel interface. Their package pinouts, supply requirements, resolution, and digital interfaces are incompatible, so they cannot be directly substituted without a complete redesign.
What are the maximum sampling rates of the ADS8344E and ADS830EG4?
The ADS8344E supports a maximum sampling rate of 100 kSPS. The ADS830EG4 supports a maximum sampling rate of 60 MSPS. The ADS830EG4 is therefore intended for high-speed applications, while the ADS8344E targets precision multi-channel data acquisition.
What input channel configurations do the ADS8344E and ADS830EG4 support?
The ADS8344E provides 8 single-ended inputs or 4 differential input pairs, selectable via its input multiplexer. The ADS830EG4 provides a single differential analog input. This makes the ADS8344E suitable for multi-channel multiplexed systems, whereas the ADS830EG4 is suited to a single high-speed signal path.
What digital interfaces do the ADS8344E and ADS830EG4 use?
The ADS8344E uses a serial SPI/QSPI-compatible interface for configuration and data readout. The ADS830EG4 provides a parallel digital output bus for high-speed data transfer. System designers must account for these different interface requirements when selecting or replacing either device.
What are the supply voltage requirements for the ADS8344E and ADS830EG4?
The ADS8344E operates from a single supply ranging from 2.7 V to 5 V. The ADS830EG4 operates from a 5 V analog supply with a separate digital supply for its output interface. Designs must ensure the supply rails and decoupling meet each device's datasheet requirements.
What package types are the ADS8344E and ADS830EG4 available in?
The ADS8344E is offered in a 20-pin SSOP package. The ADS830EG4 is offered in a 20-pin TSSOP package. Although both are 20-pin packages, their pin functions and footprints differ, so PCB layouts are not interchangeable.
Which applications are best suited to the ADS8344E versus the ADS830EG4?
The ADS8344E is suited to precision multi-channel data acquisition such as industrial process control, instrumentation, and portable measurement systems. The ADS830EG4 is suited to high-speed signal processing applications such as video digitization, ultrasound, and communications receivers where 8-bit resolution at 60 MSPS is adequate.