My Inquiry
My Account
Texas Instruments ADS8345N/1K
- Part No.:
- ADS8345N/1K
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADS8345N/1K.pdf
- Description:
- IC ADC 16BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,671
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS8345N/1K from Texas Instruments is a 16-bit, 8-channel SAR analog-to-digital converter with synchronous serial interface, bipolar input range (±VREF), and up to 100kHz throughput. It operates from a single 2.7V–5V supply, supports both single-ended and differential input configurations, and features an onboard 8-channel multiplexer-ideal for portable data loggers and battery-powered test equipment.
For engineers reviewing the ADS8345N/1K datasheet, ADS8345N/1K pinout, ADS8345N/1K application, or ADS8345N/1K equivalent, key selection considerations include its 85dB SINAD at 10kHz, ±8 LSB integral linearity error over –40°C to +85°C, QSOP-20/SSOP-20 package compatibility, and shutdown mode reducing power to <15µW.
Technical Context
The ADS8345N/1K implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling precise 16-bit conversion without external hold circuitry. Its 8-channel analog multiplexer supports flexible input routing-either 8 single-ended channels referenced to COM or 4 fully differential pairs (CH0–CH7)-configured via a 24-bit serial control word.
It uses a synchronous 4-wire SPI-compatible interface (DIN/DOUT/DCLK/CS) with BUSY signaling and supports two clock modes: external clock (up to 2.4MHz) or internal clock (2.4MHz typical). The reference input (VREF = 0.5V to VCC/2) directly defines full-scale span (±VREF), and COM serves as common-mode reference for single-ended operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit SAR - delivers 65,536 discrete output codes with monotonic transfer function and no missing codes guaranteed. |
| Throughput Rate | 100kHz maximum - enables real-time sampling of signals up to ~40kHz (Nyquist-limited) in continuous acquisition. |
| SINAD | 85dB at 10kHz (VREF = 2.5V) - ensures high-fidelity digitization for precision measurement applications. |
| Integral Linearity Error | ±8 LSB (ADS8345N grade) - corresponds to ±0.05% FSR error, critical for accurate multi-channel calibration. |
| Supply Range | 2.7V to 5.25V - supports direct integration into 3.3V and 5V systems without level-shifting or regulation overhead. |
| Power Dissipation | 3.2–5mW at 2.7V / 100kHz - enables >100-hour operation on coin-cell batteries in low-duty-cycle data logging. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and portable environmental conditions without derating. |
Pinout & Package
ADS8345N/1K is packaged in SSOP-20 (DB package), a 0.65mm pitch, 7.2mm × 5.3mm surface-mount package with gull-wing leads. Pinout is identical to ADS8344 and ADS7844 per TI SBAS177C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog input channels | Eight configurable inputs; selected via A2–A0 bits and SGL/DIF control-supports either single-ended (vs COM) or differential (pairwise) acquisition. |
| COM | Common-mode reference | Typically tied to VREF or VCC/2; establishes DC bias point for all single-ended channels and common-mode voltage for differential pairs. |
| VREF | Reference voltage input | Unbuffered input accepting 0.5V–VCC/2; sets full-scale range (±VREF); LSB = VREF/65536 determines effective resolution floor. |
| +VCC (Pins 12, 20) | Power supply | Dual power pins reduce IR drop and improve PSRR; supports 2.7V–5.25V operation with 1.2–2.0mA quiescent current. |
| GND (Pins 13, 14) | Analog/digital ground | Separate ground pins minimize coupling between analog sampling and digital switching noise. |
| SHDN | Shutdown control | Active-low input; pulls device into <15µW standby, retaining configuration state-enables rapid wake-up for burst-mode acquisition. |
| CS | Chip select | Active-low enable for serial interface; places DOUT and BUSY in high-impedance when deasserted-allows multi-device bus sharing. |
| DIN/DOUT/DCLK/BUSY | Serial interface signals | 4-wire SPI-compatible I/O; BUSY indicates conversion progress; DOUT is edge-aligned to DCLK falling edge for deterministic timing. |
Key Features
| Feature | Design Value |
|---|---|
| Onboard 8-channel analog multiplexer | Reduces external signal conditioning components; eliminates need for external MUX ICs or relays in multi-sensor systems. |
| Bipolar input range (±VREF) | Enables direct digitization of AC-coupled or centered sensor outputs (e.g., strain gauges, accelerometers) without level-shifting circuitry. |
| Pin-for-pin compatibility with ADS7844/ADS8344 | Allows drop-in upgrade path from 12-bit to 16-bit resolution while reusing existing PCB layout and firmware interface logic. |
| Internal clock mode (PD1=1, PD0=0) | Decouples conversion timing from host processor clock-simplifies firmware, improves noise immunity, and enables variable readout intervals. |
| Low-power shutdown (<15µW) | Extends battery life in intermittent-sampling applications (e.g., environmental monitors) without requiring power sequencing or reset recovery. |
Applications
| Portable Data Acquisition | Industrial Sensor Monitoring |
|---|---|
|
Use Scenario: Multi-channel voltage logging in handheld field meters measuring thermocouples, RTDs, and bridge sensors. IC Role / Device Role / Timing Role: Central 16-bit ADC managing 8 analog inputs via internal MUX; synchronized by internal clock to decouple from host MCU timing jitter. Use Value: Delivers 85dB SINAD and ±8 LSB INL across –40°C to +85°C, enabling sub-0.1% accuracy without per-channel calibration. |
Use Scenario: Distributed I/O modules acquiring vibration, pressure, and temperature signals in factory automation cabinets. IC Role / Device Role / Timing Role: High-resolution analog front-end with bipolar input support for ±10V industrial transducers and isolated current loops. Use Value: Single-supply 2.7V–5V operation simplifies power design; channel-to-channel isolation >105dB prevents crosstalk in dense multi-signal environments. |
| Battery-Powered Test Equipment | Medical Instrumentation |
|
Use Scenario: Portable oscilloscope probes and handheld LCR meters requiring low-noise, high-linearity sampling. IC Role / Device Role / Timing Role: Precision SAR ADC with 100kHz throughput and 85dB SINAD-used with external op-amp driver and low-noise reference. Use Value: 5mW power at 2.7V enables >20 hours runtime on AA batteries; shutdown mode reduces idle current to <15µW. |
Use Scenario: Patient-worn vital sign monitors digitizing ECG, EMG, and bioimpedance waveforms. IC Role / Device Role / Timing Role: Low-power, high-SFDR ADC capturing biopotential signals with 98dB spurious-free dynamic range. Use Value: Differential input mode rejects common-mode interference from 50/60Hz mains; COM pin allows adaptive biasing for electrode offset compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8344N | 12-bit resolution, same SSOP-20 package and pinout; lower INL (±2 LSB), higher throughput (200kHz). | Targeted at cost-sensitive, lower-accuracy systems where 12-bit resolution suffices (e.g., basic panel meters). | Select ADS8344N only if resolution requirement is ≤12 bits and higher speed justifies reduced dynamic performance. |
| ADS8325IPW | 16-bit, single-channel, 100kSPS, TSSOP-16; lacks internal MUX, requires external signal routing. | Suitable for dedicated single-signal paths (e.g., precision voltage reference monitoring) with minimal board space. | Choose ADS8325IPW when channel count is ≤1 and layout area is constrained-avoid when multi-channel consolidation is needed. |
Compared with ADS8344N and ADS8325IPW, the ADS8345N/1K uniquely combines 16-bit resolution, 8-channel MUX, and pin compatibility with legacy 12-bit designs-making it optimal for upgrading existing data loggers without PCB revision while maintaining system-level accuracy and channel density.
Availability
ADS8345N/1K is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and battery-powered test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS8345N/1K 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 high-performance silicon solutions for industrial, automotive, and communications markets.
The ADS8345N/1K belongs to TI's precision data acquisition portfolio, designed specifically for low-power, high-resolution multichannel sampling in portable and distributed measurement systems.
FAQ
What is the maximum conversion rate supported by the ADS8345N/1K?
The ADS8345N/1K supports a maximum throughput rate of 100kHz, achieved with a 2.4MHz external clock (fDCLK = 24 × fSAMPLE). At this rate, each conversion completes in 24 clock cycles, and the device draws 3.2–5mW depending on supply voltage. Performance remains specified across the full –40°C to +85°C range.
Does the ADS8345N/1K require an external reference voltage?
Yes, the ADS8345N/1K requires an external reference voltage applied to the VREF pin. It accepts 0.5V to VCC/2 (e.g., 1.25V at 2.7V supply, 2.5V at 5V supply), and this reference directly defines the full-scale input range (±VREF). The reference input is unbuffered and draws up to 40µA, so a low-output-impedance source is recommended.
How does the ADS8345N/1K handle single-ended versus differential input configurations?
The ADS8345N/1K configures input mode via the SGL/DIF bit in the 24-bit control word. In single-ended mode (SGL/DIF = HIGH), each CHx input is referenced to the COM pin. In differential mode (SGL/DIF = LOW), pairs like CH0/CH4 form true differential inputs. Both modes support the same ±VREF full-scale span but differ in common-mode rejection and noise immunity.
Is the ADS8345N/1K pin-compatible with other TI ADCs?
Yes, the ADS8345N/1K is explicitly pin-for-pin compatible with the ADS7844 (12-bit) and ADS8344 (12-bit), sharing identical SSOP-20 pinout, signal naming, and control protocol. This allows hardware reuse and firmware migration paths when upgrading resolution from 12-bit to 16-bit without PCB redesign.
What power-saving features does the ADS8345N/1K offer for battery-operated systems?
The ADS8345N/1K provides two low-power mechanisms: (1) SHDN pin asserts hardware shutdown drawing <15µW, and (2) auto power-down mode (PD1=PD0=0) disables internal circuitry between conversions. Quiescent current drops to 3µA in power-down mode, extending battery life in intermittent-sampling applications.
ADS8345N/1K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 4, 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- 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
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8345N/1K FAQ
1.How can I place an order for ADS8345N/1K through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8345N/1K 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 ADS8345N/1K reliable?
The price and inventory of ADS8345N/1K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8345N/1K is usually 5 days.
3.What payment methods are accepted for ADS8345N/1K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8345N/1K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8345N/1K?
ADS8345N/1K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8345N/1K 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 ADS8345N/1K?
For technical support, including ADS8345N/1K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8345N/1K requirements.
6.How does Aetrix verify that ADS8345N/1K is sourced from the original manufacturer or authorized distributors?
All ADS8345N/1K 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 ADS8345N/1K meets industry standards.
7.What is the process for return or replacement of ADS8345N/1K?
All ADS8345N/1K units undergo pre-shipment inspection (PSI). If there is an issue with ADS8345N/1K, 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 ADS8345N/1K part is unused and in its original packaging.
Return procedure for ADS8345N/1K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS8345N/1K 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…
