My Inquiry
My Account
Texas Instruments ADS7958SRGER
- Part No.:
- ADS7958SRGER
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ADS7958SRGER.pdf
- Description:
- IC ADC 8BIT SAR 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,429
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS7958SRGER from Texas Instruments is a 8-bit, 4-channel, single-ended SAR analog-to-digital converter with 1-MSPS sample rate, serial SPI interface, and integrated programmable alarm thresholds per channel. It operates from 2.7–5.25 V analog supply and supports dual input ranges (0 to VREF and 0 to 2×VREF), targeting multi-channel signal monitoring in PLCs and digital power supplies.
For engineers reviewing the ADS7958SRGER datasheet, ADS7958SRGER pinout, ADS7958SRGER application, or ADS7958SRGER equivalent, key selection considerations include its 4-channel count, 8-bit resolution, 1-MSPS throughput, GPIO0 alarm output functionality, and VQFN-24 package compatibility with space-constrained industrial data acquisition systems.
Technical Context
The ADS7958SRGER implements a capacitor-based SAR architecture with inherent sample-and-hold, sampling on the falling edge of CS and using SCLK for conversion timing and serial data transfer. Its auto-sequencing mode cycles through preselected channels without host intervention, while manual mode allows per-cycle channel selection via SDI.
It features two software-selectable unipolar input ranges (0 to VREF and 0 to 2×VREF), individually configurable GPIO0 (alarm output), and two programmable per-channel alarm thresholds. The device uses separate analog (+VA) and digital I/O (+VBD) supplies, enabling glueless interfacing with mixed-voltage microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes for moderate-precision monitoring applications |
| Sample Rate | 1 MSPS - supports real-time capture of fast transients in closed-loop control and power supply feedback |
| Channel Count | 4-channel - enables simultaneous monitoring of multiple analog signals without external multiplexing |
| Analog Supply Range | 2.7 V to 5.25 V - compatible with standard industrial rails including 3.3 V and 5 V systems |
| I/O Supply Range | 1.7 V to 5.25 V - allows direct interface to low-voltage MCUs (e.g., 1.8 V or 3.3 V logic) without level shifters |
| Input Ranges | 0 to VREF and 0 to 2×VREF - selectable per system gain requirements; supports REF5025 (2.5 V) reference |
| Power Dissipation | 14.5 mW at 1 MSPS (+VA = 5 V, +VBD = 3 V) - suitable for thermally constrained embedded modules |
| Power-Down Current | 1 μA - enables rapid sleep/wake cycling to reduce average system power in battery-backed monitoring |
Pinout & Package
VQFN-24 package (4.00 mm × 4.00 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad; pin-compatible with ADS7950/54/59 family members in same footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Ch0–Ch3 | Analog input | Four single-ended analog input channels routed to internal multiplexer; no shared ground pin required |
| AINP / AINM | Differential analog input pair | Optional pseudo-differential mode using AINP as signal and AINM as reference; supports high-impedance PGA front-end |
| MXO | Analog output | Multiplexer output node - connects selected channel to ADC core; used for external buffering or diagnostics |
| REFP / REFM | Analog reference inputs | Accept external reference (e.g., REF5025); REFP = reference voltage, REFM = reference ground |
| CS / SCLK / SDI / SDO | Digital serial interface | SPI-compatible 4-wire interface; CS active-low enables frame synchronization; SCLK up to 20 MHz |
| GPIO0 | Digital I/O | Configurable as alarm output - asserts high when channel value exceeds programmed high/low threshold |
| +VA / AGND | Analog power | Separate analog supply and ground pins minimize noise coupling into conversion path |
| +VBD / BDGND | Digital I/O power | Independent digital rail decouples logic switching noise from analog section |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency conversion | Output data available immediately after conversion completes - eliminates pipeline delay in real-time control loops |
| Per-channel programmable alarms | Two independent thresholds per channel (high/low) enable autonomous over-limit detection without host polling |
| Auto-sequencing mode | Hardware-managed channel scan reduces MCU overhead and ensures deterministic timing between samples |
| Input bandwidth (3 dB) | 47 MHz - preserves signal integrity for wideband sensor outputs and fast transient events |
| GPIO0 alarm output | Dedicated interrupt-capable pin simplifies system-level fault response; eliminates need for status register reads |
| Power-down mode | 1 μA quiescent current - extends battery life in portable instrumentation and enables rapid wake-up (<1 μs) |
Applications
| PLC Analog Input Module | Digital Power Supply Monitoring |
|---|---|
|
Use Scenario: Monitoring four voltage/current feedback signals from DC-DC converters in a telecom rectifier shelf. IC Role / Device Role / Timing Role: 4-channel ADC digitizes output rails, temperature sensors, and current shunts at 1 MSPS with zero latency for real-time loop correction. Use Value: Eliminates external multiplexer and reduces BOM count; GPIO0 alarm triggers immediate shutdown on overvoltage condition. |
Use Scenario: Real-time telemetry of input voltage, output voltage, output current, and heatsink temperature in an isolated AC/DC module. IC Role / Device Role / Timing Role: Simultaneous sampling of four analog points synchronously with PWM period for accurate power calculation. Use Value: Dual input ranges allow full-scale use of 2.5 V reference across both 12 V input and 3.3 V output rails without attenuation. |
| Optical Line Card Health Monitoring | Industrial Sensor Hub |
|
Use Scenario: Monitoring bias currents, TEC voltages, photodiode outputs, and case temperature in a DWDM transponder card. IC Role / Device Role / Timing Role: SAR ADC with 47 MHz input bandwidth captures fast laser diode turn-on transients and thermal drift trends. Use Value: Low 14.5 mW power dissipation prevents localized heating near sensitive optics; VQFN-24 fits dense line card layouts. |
Use Scenario: Aggregating analog outputs from pressure, humidity, vibration, and ambient light sensors in a factory-floor edge node. IC Role / Device Role / Timing Role: Auto-sequencing mode scans all four sensors every 1 ms, feeding data to an ARM Cortex-M4 for local analytics. Use Value: Independent +VA/+VBD supplies isolate noisy digital logic from precision analog measurements, improving ENOB stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-channel, 8-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7954SRGER | 10-bit resolution, identical 4-channel VQFN-24 pinout and interface | Higher precision required for sensor calibration or higher dynamic range | Select ADS7954SRGER when ≥10-bit ENOB is needed; shares same layout and firmware structure |
| ADS7950SRGER | 12-bit resolution, same 4-channel VQFN-24 package and timing | Demands highest accuracy in metrology-grade monitoring or closed-loop servo feedback | Choose ADS7950SRGER for applications requiring <1 LSB INL or sub-0.5% total unadjusted error |
Compared with ADS7954SRGER and ADS7950SRGER, the ADS7958SRGER trades resolution for lower cost and reduced digital processing overhead-ideal where 8-bit quantization suffices for threshold-based monitoring and trend analysis.
Availability
ADS7958SRGER is available at Aetrix Electronics and suitable for PLC analog input modules, digital power supply telemetry, optical line card health monitoring, and industrial sensor hubs requiring stable component supply and long-term production continuity.
Supply support for ADS7958SRGER includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.
The ADS79xx product line was designed specifically for high-speed, multi-channel data acquisition in programmable logic controllers, optical networking equipment, and digital power systems-emphasizing pin compatibility, low power, and integrated alarm functionality.
FAQ
What is the maximum serial clock frequency supported by the ADS7958SRGER?
The ADS7958SRGER supports a maximum SCLK frequency of 20 MHz, enabling full 8-bit conversion and data readout within 1 µs. This timing aligns with its 1-MSPS sample rate specification and ensures reliable communication with high-speed microcontrollers and DSPs without requiring wait states or clock stretching in the ADS7958SRGER interface protocol.
Does the ADS7958SRGER require an external reference voltage?
Yes, the ADS7958SRGER requires an external reference applied to REFP and REFM pins. It does not include an internal reference. A precision 2.5 V source such as the REF5025 is recommended to achieve specified performance, supporting both 0 to VREF and 0 to 2×VREF input ranges as defined in the ADS7958SRGER datasheet.
How many GPIOs are available on the ADS7958SRGER in VQFN-24 package?
The ADS7958SRGER in VQFN-24 package provides one GPIO: GPIO0. Unlike TSSOP variants which offer four GPIOs, the VQFN-24 implementation dedicates this pin to alarm output functionality. Its behavior is programmable via internal registers to assert high on high- or low-threshold violation, as documented for the ADS7958SRGER device.
Can the ADS7958SRGER operate with different analog and digital supply voltages?
Yes, the ADS7958SRGER supports independent analog (+VA) and digital I/O (+VBD) supplies. +VA ranges from 2.7 V to 5.25 V for the ADC core and reference circuitry, while +VBD operates from 1.7 V to 5.25 V for the SPI interface and GPIO logic. This separation allows the ADS7958SRGER to interface directly with 1.8 V FPGAs or 3.3 V microcontrollers without level-shifting components.
What is the purpose of the MXO pin on the ADS7958SRGER?
The MXO (Multiplexer Output) pin on the ADS7958SRGER provides buffered access to the internal analog multiplexer output before the ADC core. It enables external signal conditioning-such as connection to a high-impedance PGA like THS4031-or diagnostic probing of the selected channel's analog signal, preserving signal integrity without loading the ADS7958SRGER's internal path.
ADS7958SRGER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 1M
- 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 ~ 5.25V
- Voltage - Supply, Digital:
- 1.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 24-VQFN (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7958SRGER FAQ
1.How can I place an order for ADS7958SRGER through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7958SRGER on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADS7958SRGER reliable?
The price and inventory of ADS7958SRGER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7958SRGER is usually 5 days.
3.What payment methods are accepted for ADS7958SRGER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7958SRGER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7958SRGER?
ADS7958SRGER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7958SRGER order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADS7958SRGER?
For technical support, including ADS7958SRGER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7958SRGER requirements.
6.How does Aetrix verify that ADS7958SRGER is sourced from the original manufacturer or authorized distributors?
All ADS7958SRGER products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS7958SRGER meets industry standards.
7.What is the process for return or replacement of ADS7958SRGER?
All ADS7958SRGER units undergo pre-shipment inspection (PSI). If there is an issue with ADS7958SRGER, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADS7958SRGER part is unused and in its original packaging.
Return procedure for ADS7958SRGER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS7958SRGER Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
