My Inquiry
My Account
Analog Devices Inc. LTC1391CS#PBF
- Part No.:
- LTC1391CS#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1391CS#PBF.pdf
- Description:
- IC MUX 8:1 75OHM 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,020
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1391CS#PBF from Analog Devices (formerly Linear Technology) is a high-performance 8-channel CMOS analog multiplexer with cascable serial interface, designed for precision signal routing in data acquisition and communication systems. It features 45Ω typical on-resistance, ±5nA max leakage, guaranteed break-before-make switching, and operates from single 2.7V or dual ±5V supplies. Its serial interface enables daisy-chaining for scalable channel expansion in compact embedded designs.
For engineers reviewing the LTC1391CS#PBF datasheet, LTC1391CS#PBF pinout, LTC1391CS#PBF application, or LTC1391CS#PBF equivalent, key selection criteria include its 16-pin SO package, TTL/CMOS-compatible digital interface, rail-to-rail analog input capability, and verified performance across 0°C to 70°C industrial temperature range.
Technical Context
The LTC1391CS#PBF implements a 4-bit serial shift register controlled by CLK, DIN, and CS to select one of eight analog inputs (S0–S7) to the common output D. Its control logic enforces strict break-before-make timing (35–155ns) to prevent signal shorting during channel transitions.
It supports both multiplexing and demultiplexing modes, with bidirectional analog signal paths capable of extending to supply rails. The device maintains low charge injection (±10pC max) and low off-capacitance (5pF input / 10pF output), preserving signal integrity in high-impedance sensor and ADC front-end applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance | 45Ω typical at ±5V supply - ensures minimal signal attenuation and gain error in precision measurement paths |
| Analog Input Range | ±5V with dual supply or 0–2.7V with single supply - supports rail-to-rail input signals without clamping |
| Switch Leakage | ±5nA max at 25°C - critical for low-current sensor interfaces and high-impedance sampling networks |
| Charge Injection | ±10pC max - minimizes voltage glitch on sampled-hold capacitors in ADC driver stages |
| Break-Before-Make Interval | 35–155ns - guarantees no overlap between channel conduction, preventing cross-talk or bus contention |
| Clock Frequency | 5MHz max - enables fast channel reconfiguration (<1µs per selection) for real-time signal scanning |
| Supply Voltage Range | Single 2.7V or dual ±5V - simplifies power architecture in mixed-signal systems with 3.3V or ±5V rails |
Pinout & Package
Package: 16-lead plastic small outline (SO), narrow 0.150-inch body width, RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S0–S7 (Pins 1–8) | Analog Multiplexer Inputs | Eight independent analog signal sources selectable to common output D; rail-to-rail compatible |
| GND (Pin 9) | Digital Ground Reference | Return path for digital control logic; must be tied to system ground plane for noise immunity |
| CLK (Pin 10) | Serial Clock Input | TTL/CMOS-compatible clock synchronizing DIN data latching and internal shift register operation |
| CS (Pin 11) | Channel Select Enable | Active-high control enabling serial data capture and analog channel activation; three-states DOUT when low |
| DIN (Pin 12) | Serial Data Input | 4-bit command stream (EN + B2:B0) defining channel enable and selection; synchronous to CLK rising edge |
| DOUT (Pin 13) | Serial Data Output | Shifted-out data from internal register; enables daisy-chaining multiple LTC1391CS#PBF devices |
| V– (Pin 14) | Negative Supply Rail | Supports dual-supply operation; |V–| must not exceed |V+| by more than 20% for valid channel decoding |
| D (Pin 15) | Analog Multiplexer Output | Common output node for selected S0–S7 channel; bidirectional signal path with low RON and leakage |
| V+ (Pin 16) | Positive Supply Rail | Primary power for analog switch array and digital interface; accepts 2.7V single or +5V dual supply |
Key Features
| Feature | Design Value |
|---|---|
| Cascadable Serial Interface | Enables daisy-chaining of multiple LTC1391CS#PBF units using single CLK/DIN/CS lines - reduces MCU GPIO count and PCB routing complexity |
| Rail-to-Rail Analog Inputs | Accepts input voltages from V– to V+ - eliminates need for level-shifting circuitry in ±5V or 0–2.7V systems |
| Guaranteed Break-Before-Make | Prevents momentary shorting between channels during switching - essential for safe operation in multi-source sensor arrays |
| Low Charge Injection (±10pC) | Minimizes transient voltage spikes on sampling capacitors - improves accuracy in successive-approximation ADC front-ends |
| TTL/CMOS Digital Compatibility | Operates reliably with 3.3V or 5V logic families across full temperature range - simplifies interface to microcontrollers and FPGAs |
Applications
| Data Acquisition Systems | Communication Signal Routing |
|---|---|
Use Scenario: Scanning 8 thermocouple or RTD sensor outputs into a single 12-bit ADC channel. IC Role / Device Role / Timing Role: Analog multiplexer providing low-leakage, low-RON signal selection synchronized to ADC conversion trigger. Use Value: ±5nA leakage and 45Ω RON preserve microvolt-level sensor resolution; break-before-make prevents sensor source loading conflicts. | Use Scenario: Routing RF front-end test signals between multiple filters, amplifiers, and spectrum analyzers in lab equipment. IC Role / Device Role / Timing Role: High-isolation (70dB off-isolation) analog switch enabling clean signal path reconfiguration under microcontroller control. Use Value: 70dB off-isolation suppresses crosstalk between adjacent RF paths; 5MHz clock support allows rapid test sequence execution. |
| Industrial Process Monitoring | Medical Instrumentation |
Use Scenario: Multiplexing 8 pressure, flow, and temperature transducer outputs in PLC I/O modules. IC Role / Device Role / Timing Role: Robust analog switch operating over 0°C to 70°C with fault-tolerant digital inputs (100mA surge rating). Use Value: Guaranteed operation across industrial temperature range; digital inputs withstand ESD and transient surges without external protection. | Use Scenario: Selecting ECG electrode inputs in portable patient monitors with battery-powered 3.3V supply. IC Role / Device Role / Timing Role: Low-power analog MUX enabling rail-to-rail biopotential signal routing with minimal offset drift. Use Value: 2µA supply current (typical at 2.7V) extends battery life; low charge injection avoids baseline wander in high-gain amplifier stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG708BRUZ | 8-channel CMOS MUX with SPI interface; 4.5Ω RON at 3V; no daisy-chain capability; 16-TSSOP package | Higher speed and lower RON but lacks cascading serial interface - requires separate CS per device in multi-MUX systems | Preferred when lowest on-resistance and fastest switching are critical, and board space permits discrete CS routing |
| LTC1390CS#PBF | Pin-compatible 8:1 MUX with bidirectional serial interface (DIN/DOUT shared); 40Ω RON; same SO-16 package | Supports half-duplex serial communication only - limits daisy-chain depth and timing flexibility vs. dedicated DIN/DOUT | Selected when system requires minimal interconnect (single data line) and cascading is limited to 2–3 devices |
Compared with ADG708BRUZ, LTC1391CS#PBF trades lower RON for scalable serial control; versus LTC1390CS#PBF, it provides dedicated DIN/DOUT lines enabling deterministic multi-device programming without bus turnaround delays.
Availability
LTC1391CS#PBF is available at Aetrix Electronics and suitable for data acquisition systems, industrial process monitoring, medical instrumentation, and communication signal routing requiring stable component supply and long-term design continuity.
Supply support for LTC1391CS#PBF 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
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1391CS#PBF belongs to Linear Technology's precision analog multiplexer product line, engineered for low-distortion, low-leakage signal routing in high-fidelity data acquisition and sensor interface applications.
FAQ
What supply configurations does the LTC1391CS#PBF support?
The LTC1391CS#PBF supports both single-supply (2.7V to 5V) and dual-supply (±5V) operation. In single-supply mode, V– is connected to GND and V+ ranges from 2.7V to 5V; in dual-supply mode, V+ and V– establish symmetric rails up to ±5V. Total supply voltage (V+ to V–) must not exceed 15V. This flexibility allows integration into diverse power architectures without redesigning the supply network for the LTC1391CS#PBF.
How does the serial interface of the LTC1391CS#PBF enable daisy-chaining?
The LTC1391CS#PBF uses dedicated DIN and DOUT pins to form a unidirectional serial shift chain. When multiple LTC1391CS#PBF devices are connected - DOUT of one to DIN of the next - a single 4-bit command stream can configure all devices sequentially. The CS signal coordinates latching: high to load data into each device's shift register, then low to activate the selected channel. This eliminates additional GPIOs and simplifies firmware for systems scaling beyond 8 channels.
Is the LTC1391CS#PBF suitable for use with 12-bit ADCs like the LTC1400?
Yes, the LTC1391CS#PBF is explicitly validated for use with 12-bit ADCs including the LTC1400. Its 45Ω on-resistance, ±10pC charge injection, and ±5nA leakage ensure minimal gain/offset error and sampling capacitor disturbance. Application diagrams in the LTC1391CS#PBF datasheet show direct interfacing with the LTC1400, confirming compatibility in terms of timing, voltage levels, and signal integrity for 12-bit accuracy.
What is the guaranteed break-before-make interval for the LTC1391CS#PBF?
The LTC1391CS#PBF guarantees a break-before-make interval of 35ns minimum to 155ns maximum across temperature and supply conditions. This parameter is tested and specified in the Electrical Characteristics table under "tOPEN". It ensures that the previously selected channel fully disconnects before the newly selected channel closes - preventing momentary short circuits between analog sources, which is critical in multi-sensor or multi-transducer systems using the LTC1391CS#PBF.
Does the LTC1391CS#PBF support rail-to-rail analog input operation?
Yes, the LTC1391CS#PBF supports rail-to-rail analog input operation: analog inputs S0–S7 and output D can swing from V– to V+ under all specified supply conditions. This is confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections, where "Analog Signal Range" is listed as –5V to +5V (dual supply) or 0V to 2.7V (single supply). No external level-shifting circuitry is required when interfacing with rail-to-rail op-amps or sensors driving the LTC1391CS#PBF.
LTC1391CS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 8:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 75Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- 2.7V
- Voltage - Supply, Dual (V±):
- ±5V
- Switch Time (Ton, Toff) (Max):
- 400ns, 200ns
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 5pF, 10pF
- Current - Leakage (IS(off)) (Max):
- 5nA
- Crosstalk:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LTC1391CS#PBF FAQ
1.How can I place an order for LTC1391CS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1391CS#PBF 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 LTC1391CS#PBF reliable?
The price and inventory of LTC1391CS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1391CS#PBF is usually 5 days.
3.What payment methods are accepted for LTC1391CS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1391CS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1391CS#PBF?
LTC1391CS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1391CS#PBF 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 LTC1391CS#PBF?
For technical support, including LTC1391CS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1391CS#PBF requirements.
6.How does Aetrix verify that LTC1391CS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1391CS#PBF 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 LTC1391CS#PBF meets industry standards.
7.What is the process for return or replacement of LTC1391CS#PBF?
All LTC1391CS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1391CS#PBF, 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 LTC1391CS#PBF part is unused and in its original packaging.
Return procedure for LTC1391CS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1391CS#PBF Tags
-
SN74LVC1G3157DBVR
Texas Instruments
-
SN74LVC1G66DBVR
Texas Instruments
-
SN74LVC1G66DCKR
Texas Instruments
-
SN74LVC1G3157DSFR
Texas Instruments
-
1P1G3157QDCKRQ1
Texas Instruments
-
SN74LVC2G66DCUR
Texas Instruments
-
SN74LV4052APWR
Texas Instruments
-
74HC4051D,653
Nexperia USA Inc.
-
SN74LV4051APWR
Texas Instruments
-
CD74HC4052PWR
Texas Instruments
-
CD74HC4051PWR
Texas Instruments
-
TS5A3166DBVR
Texas Instruments
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…
