Part A
ADS8344NB
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 5654 PCS
- Package
- SSOP-20
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The ADS8344NB and ADS830EG4 are not functionally interchangeable: the ADS8344NB is a 16-bit, 4-channel successive-approximation ADC with a serial SPI/QSPI interface in a 20-pin SSOP package, while the ADS830EG4 is an 8-bit, single-channel pipelined ADC with a parallel interface in a 20-pin SOIC package. Their resolution, channel count, digital interface, and package footprint all differ, so substituting one for the other requires a full board and firmware redesign rather than a direct swap.
Different resolution
Different channel count
Different digital interface
Different package footprint
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADS8344NB | 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 sampling 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 | 8 (single-ended) / 4 (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 / Differential (multiplexed) | Single-ended | Differential inputs improve noise immunity and common-mode rejection; the ADS8344 supports both configurations while the ADS830 is limited to single-ended input. |
| Interface | SPI / Serial | Parallel | The digital interface must match the host system; a serial SPI device and a parallel-output device require different board routing and controller support, preventing direct drop-in substitution. |
| Supply Voltage | 2.7 V to 5.25 V | 5 V (single supply) | Supply range affects compatibility with system rails and logic levels; the wider-range ADS8344 can operate at lower voltages, while the ADS830 requires a 5 V supply. |
| Architecture | SAR (Successive Approximation) | Pipeline | Converter architecture influences latency, speed, and accuracy trade-offs; SAR suits precision low-speed sampling while pipeline enables high throughput with pipeline delay. |
| Package | SSOP-20 | TSSOP-20 | Package footprint and pinout must match for board-level interchangeability; differing package types require layout changes even if electrical specs were compatible. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range confirms both parts suit the same environmental conditions, so thermal constraints do not differentiate them for substitution. |
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 | ADS8344NB | 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 ADS8344NB and the ADS830EG4?
The ADS8344NB 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 ADS8344NB and ADS830EG4 be used interchangeably in the same circuit?
No. The two devices are not pin-compatible or functionally interchangeable. The ADS8344NB is a 24-pin SSOP (DB) package with a serial interface and multi-channel input multiplexer, while the ADS830EG4 is a 20-pin SSOP (DB) package with a parallel 8-bit output bus. Their supply requirements, input configurations, and digital interfaces differ, so a direct substitution is not possible without a complete redesign.
What are the maximum sampling rates of the ADS8344NB and ADS830EG4?
The ADS8344NB has a maximum sampling rate of 100 kSPS (kilo-samples per second) as specified in the Texas Instruments datasheet. The ADS830EG4 has a maximum sampling rate of 60 MSPS (mega-samples per second). The ADS830EG4 is therefore intended for high-speed applications, while the ADS8344NB targets precision, multi-channel, lower-speed acquisition.
What input voltage ranges do the ADS8344NB and ADS830EG4 support?
The ADS8344NB supports single-ended or differential inputs with a 0 V to VREF range (unipolar) or ±VREF (bipolar) configuration, where VREF can be set externally. The ADS830EG4 has an internal reference and accepts a 1.5 V to 3.5 V analog input range (with internal reference) or an externally set range, typically configured for a 2 V peak-to-peak differential or single-ended input. Designers must match the input drive and reference configuration to each device's datasheet specifications.
How do the digital interfaces of the ADS8344NB and ADS830EG4 differ?
The ADS8344NB uses a serial interface compatible with SPI, QSPI, and Microwire, requiring fewer I/O pins and suited to isolated or space-constrained designs. The ADS830EG4 provides a parallel 8-bit CMOS-compatible output bus plus a clock input and output enable, which supports high-speed data capture but requires more PCB traces and a compatible high-speed digital receiver.
What are the typical power supply requirements for the ADS8344NB and ADS830EG4?
The ADS8344NB operates from a single supply of 2.7 V to 5 V and typically consumes low power (on the order of hundreds of microwatts to a few milliwatts depending on supply and throughput), making it suitable for portable and battery-powered systems. The ADS830EG4 operates from a 5 V analog supply and a 5 V digital supply (with separate AGND and DGND), and its power consumption is significantly higher due to the 60 MSPS pipelined architecture. Exact current and power figures should be taken from the respective manufacturer datasheets.
In which application areas is each device typically used?
The ADS8344NB is commonly used in multi-channel data acquisition, industrial process control, portable instrumentation, and battery-powered measurement systems where 16-bit resolution and serial interface simplicity are valued. The ADS830EG4 is used in high-speed signal processing, video digitization, ultrasound, and communications receivers where 8-bit resolution at 60 MSPS is required. Selection should be based on the required resolution, speed, channel count, and interface constraints of the target design.