My Inquiry
My Account
Analog Devices Inc. LTC1279IG#TRPBF
- Part No.:
- LTC1279IG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1279IG#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,987
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1279IG#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 600ksps successive-approximation ADC with internal reference, synchronized clock, and power shutdown. It operates from single 5V or ±5V supplies, delivers 70dB S/(N+D) at 100kHz, consumes 60mW typical, and supports unipolar (0V–5V) or bipolar (±2.5V) input ranges - ideal for high-speed data acquisition in industrial instrumentation.
For engineers reviewing the LTC1279IG#TRPBF datasheet, LTC1279IG#TRPBF pinout, LTC1279IG#TRPBF application, or LTC1279IG#TRPBF equivalent, key selection criteria include guaranteed ±1LSB INL/DNL, 1.4µs conversion time, instant wake-up from shutdown (<350ns), flexible parallel interface timing modes, and SO-24 wide package compatibility with DSP/microprocessor buses.
Technical Context
The LTC1279IG#TRPBF implements a 12-bit capacitive DAC-based successive approximation architecture with integrated sample-and-hold (160ns acquisition), factory-trimmed internal 2.42V bandgap reference, and self-synchronizing internal clock - eliminating external clock source requirements. Its control logic supports Mode 1/2 read protocols via CS, CONVST, RD, and BUSY signals.
It features separate analog (AGND, AVDD, VSS) and digital (DGND, DVDD) supply domains, high-impedance analog input (±1µA leakage), and three-state parallel output drivers (D11–D0). Bipolar operation requires –5V on VSS; unipolar mode ties VSS to AGND. Reference output (pin 2) sources up to 800µA with ±10ppm/°C tempco.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees monotonic transfer and full-scale code coverage (0–4095). |
| Sampling Rate | 600ksps maximum - enables real-time capture of signals up to 300kHz Nyquist bandwidth. |
| S/(N + D) | 70dB at 100kHz input - ensures ≥11.3 effective bits for precision measurement applications. |
| INL / DNL | ±1LSB max - supports accurate DC measurements and linearity-critical closed-loop control. |
| Power Dissipation | 60mW typ at 600ksps; drops to 8.5mW in shutdown - reduces thermal load in dense PCB layouts. |
| Conversion Time | 1.4µs typ - defines minimum throughput interval and synchronizes BUSY assertion timing. |
| Analog Input Range | 0V to 5V (unipolar, 5V supply) or ±2.5V (bipolar, ±5V supplies) - matches standard sensor and signal chain levels. |
Pinout & Package
Package: 24-lead plastic SO wide (SW), RoHS-compliant, JEDEC MS-013AC, body width 7.5mm, lead pitch 1.27mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN (1) | Analog Input | High-impedance node accepting 0V–5V (unipolar) or ±2.5V (bipolar); 25pF capacitance in sample mode. |
| VREF (2) | Reference Output | 2.42V ±20mV buffered output; drives external loads ≤800µA; requires 10µF + 0.1µF bypassing. |
| AGND (3) | Analog Ground | Single-point return for analog circuitry; must be isolated from DGND except at star ground point. |
| D11–D4 (4–11) | Data Outputs (MSB) | Three-state parallel bus outputs; D11 = MSB; active-low CS and RD required to enable. |
| DGND (12) | Digital Ground | Return for digital I/O; connected to system logic ground but kept separate from AGND routing. |
| D3–D0 (13–16) | Data Outputs (LSB) | Completes 12-bit parallel word; D0 = LSB; same timing and drive specs as D11–D4. |
| DVDD (17) | Digital Supply | +5V supply for digital core and output drivers; tied to AVDD in most designs. |
| SHDN (18) | Shutdown Control | Active-low input; pulls IDD to 1.7mA and cuts power to analog section while preserving state. |
| CONVST (19) | Conversion Start | Falling-edge triggered; initiates SAR cycle only when CS = low; wake-up delay <350ns from SHDN↑. |
| RD (20) | Read Strobe | Active-low; enables output drivers during Mode 1/2 read cycles; controls data access timing (t8 = 35ns min). |
| CS (21) | Chip Select | Active-low enable for CONVST and RD recognition; must be stable before CONVST edge (t2 ≥ 20ns setup). |
| BUSY (22) | Status Indicator | Active-low open-drain output; asserts low during conversion; used for polling or interrupt generation. |
| VSS (23) | Negative Supply | –5V for bipolar mode; tied to AGND for unipolar; bypassed with 0.1µF ceramic to AGND. |
| AVDD (24) | Analog Supply | +5V analog supply; bypassed with 10µF tantalum + 0.1µF ceramic to AGND; shared with DVDD. |
Key Features
| Feature | Design Value |
|---|---|
| Internal synchronized clock | Eliminates external clock source and associated jitter/noise coupling; clock auto-resynchronizes per CONVST. |
| Instant wake-up from shutdown | 350ns max delay from SHDN↑ to valid CONVST response - enables power gating between samples without latency penalty. |
| Flexible parallel interface | Supports Mode 1 (RD-controlled) and Mode 2 (BUSY-controlled) timing - simplifies integration with FIFOs, DSPs, and µPs. |
| Overdrivable internal reference | VREF pin accepts external 2.45V–4.8V reference - enables input span adjustment and improved drift performance (e.g., with LT1019A-2.5). |
| High-impedance analog input | ±1µA leakage and 25pF input capacitance - minimizes loading on front-end op amps (e.g., LT1360, LT1220). |
| Guaranteed AC performance | 70dB S/(N+D) and –78dB THD at 100kHz over temperature - validated across industrial range (–40°C to +85°C). |
Applications
| Industrial Data Acquisition | DSP-Based Signal Processing |
|---|---|
|
Use Scenario: High-channel-count PLC modules acquiring sensor outputs (RTDs, strain gauges) at sub-millisecond intervals. IC Role / Device Role / Timing Role: Primary sampling engine with deterministic 1.4µs conversion and BUSY-driven handshaking to FPGA controller. Use Value: ±1LSB linearity and 70dB SNDR ensure calibrated accuracy across 40+ channels without per-channel trimming. |
Use Scenario: Real-time spectral analysis in telecom baseband processors using FFT on sampled RF IF signals. IC Role / Device Role / Timing Role: Front-end ADC feeding parallel bus directly into TI C6000 DSP EMIF with Mode 2 timing. Use Value: Full-power bandwidth >5MHz and low spurious noise preserve signal integrity for 12-bit dynamic range analysis. |
| Multiplexed Sensor Systems | Audio Bandwidth Test Equipment |
|
Use Scenario: 16-channel vibration monitor switching between accelerometers using analog multiplexer before ADC input. IC Role / Device Role / Timing Role: Central ADC with fast wake-up (350ns) enabling power-down between channel conversions to reduce system power. Use Value: 60mW active / 8.5mW shutdown power enables thermally constrained enclosures with 24/7 operation. |
Use Scenario: Audio analyzer capturing 24-bit PCM streams via oversampling, requiring clean 12-bit snapshots at 600ksps. IC Role / Device Role / Timing Role: Precision sampling stage preceding digital decimation filter; referenced to external LT1019A-2.5 for <5ppm/°C drift. Use Value: 74dB THD at Nyquist (300kHz) exceeds CD-quality audio test requirements and supports harmonic distortion mapping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, 600ksps ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7892BRZ-1 | Same 12-bit SAR architecture, 600ksps, but requires external reference and clock; no internal shutdown. | Needs additional reference IC (e.g., ADR431) and clock generator; higher BOM count and layout complexity. | Select when external reference control or clock synchronization to system master clock is required. |
| MAX1166BCAP+ | 12-bit, 500ksps (slower), internal reference (2.048V), SPI interface instead of parallel; 20-pin TSSOP. | Serial interface reduces pin count but increases µP overhead; lower sampling rate limits Nyquist bandwidth to 250kHz. | Select for space-constrained designs where serial interface and smaller footprint outweigh speed loss. |
Compared with AD7892BRZ-1 and MAX1166BCAP+, the LTC1279IG#TRPBF provides integrated clock and reference with parallel interface - reducing component count and timing design effort while maintaining full 600ksps throughput and industrial temperature support.
Availability
LTC1279IG#TRPBF is available at Aetrix Electronics and suitable for industrial data acquisition, DSP interfacing, and multiplexed sensor systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LTC1279IG#TRPBF 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 LTC1279IG#TRPBF belongs to ADI's legacy Linear Technology precision data converter family, designed specifically for high-speed, low-power, easy-to-use 12-bit sampling in demanding industrial and instrumentation environments.
FAQ
What supply configurations does the LTC1279IG#TRPBF support?
The LTC1279IG#TRPBF supports two supply configurations: unipolar operation with single +5V on AVDD/DVDD and VSS tied to AGND (0V–5V input), or bipolar operation with +5V on AVDD/DVDD and –5V on VSS (±2.5V input). Absolute maximum ratings allow VSS down to –6V and total supply voltage up to 12V, but specified performance is guaranteed only within the ±5V bipolar or +5V unipolar ranges. The LTC1279IG#TRPBF draws 12mA from AVDD and 0.12mA from VSS at 600ksps.
How does the internal reference of the LTC1279IG#TRPBF function, and can it be overdriven?
The LTC1279IG#TRPBF integrates a factory-trimmed 2.42V bandgap reference accessible at pin 2 (VREF), with ±10ppm/°C tempco and load regulation of 2LSB/mA. It can source up to 800µA and must be bypassed with 10µF tantalum + 0.1µF ceramic. The VREF pin may be overdriven by an external reference (≥2.45V, ≤4.8V) to adjust input span - for example, using an LT1019A-2.5 to achieve ±2.58V range and <5ppm/°C drift. The LTC1279IG#TRPBF reference remains active unless externally overridden.
What are the timing requirements for reading data from the LTC1279IG#TRPBF?
The LTC1279IG#TRPBF supports two read modes. In Mode 1, RD↓ must occur after BUSY↑ with t7 ≥ –20ns setup; data is valid t8 = 35ns after RD↓ (CL = 20pF). In Mode 2, RD↓ occurs while BUSY is high, and data remains valid until BUSY↓. Minimum RD low time equals t8. All timing is referenced to 20pF/100pF loads, and commercial-grade parts specify t8 ≤ 110ns. The LTC1279IG#TRPBF BUSY signal provides precise conversion completion indication for reliable handshaking.
Does the LTC1279IG#TRPBF require an external clock, and how is conversion synchronized?
No, the LTC1279IG#TRPBF does not require an external clock. It contains an internally trimmed oscillator that automatically synchronizes to each falling edge of CONVST, eliminating asynchronous clock feedthrough issues common in competing ADCs. This internal clock delivers consistent 1.4µs conversion time and eliminates clock routing, jitter management, and external component requirements. The LTC1279IG#TRPBF achieves this while maintaining full 600ksps throughput and guaranteed AC performance across temperature.
What is the guaranteed linearity performance of the LTC1279IG#TRPBF over temperature?
The LTC1279IG#TRPBF guarantees ±1LSB integral nonlinearity (INL) and ±1LSB differential nonlinearity (DNL) over its full industrial temperature range (–40°C to +85°C), as specified for the "I" grade suffix. These values are tested and ensured across process, voltage, and temperature corners - not just at 25°C. The LTC1279IG#TRPBF also maintains ±6LSB bipolar offset error and ±15LSB gain error across temperature, supporting high-accuracy DC measurement applications without calibration.
LTC1279IG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 600k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V, -2.45V ~ 5.25
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1279IG#TRPBF FAQ
1.How can I place an order for LTC1279IG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1279IG#TRPBF 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 LTC1279IG#TRPBF reliable?
The price and inventory of LTC1279IG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1279IG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1279IG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1279IG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1279IG#TRPBF?
LTC1279IG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1279IG#TRPBF 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 LTC1279IG#TRPBF?
For technical support, including LTC1279IG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1279IG#TRPBF requirements.
6.How does Aetrix verify that LTC1279IG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1279IG#TRPBF 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 LTC1279IG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1279IG#TRPBF?
All LTC1279IG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1279IG#TRPBF, 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 LTC1279IG#TRPBF part is unused and in its original packaging.
Return procedure for LTC1279IG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1279IG#TRPBF 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…
