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Analog Devices Inc. LTC1409IG#PBF
- Part No.:
- LTC1409IG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1409IG#PBF.pdf
- Description:
- IC ADC 12BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,938
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Product details
Overview
LTC1409IG#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 800ksps successive-approximation ADC with differential sampling, ±2.5V bipolar input range, 72.5dB S/(N+D) at 400kHz, ±1LSB INL/DNL over temperature, and internal 2.5V reference. It serves as a high-speed data acquisition front-end in telecom and DSP systems requiring precise analog-to-digital conversion without pipeline delay.
For engineers reviewing the LTC1409IG#PBF datasheet, LTC1409IG#PBF pinout, LTC1409IG#PBF application, or LTC1409IG#PBF equivalent, key selection factors include its 20MHz full-power bandwidth, dual shutdown modes (4mW Nap / 10µW Sleep), ±60dB common-mode rejection, and µP-compatible 12-bit parallel output with BUSY/CONVST control timing.
Technical Context
The LTC1409IG#PBF implements a capacitor-based successive approximation register (SAR) architecture with integrated differential sample-and-hold, enabling true differential acquisition up to 20MHz. Its internal 2.5V bandgap reference features ±15ppm/°C tempco and drives a precision reference amplifier with REFCOMP compensation pin.
Conversion is initiated by falling edge of CONVST under active CS; BUSY signals completion with no pipeline latency. Digital outputs D11–D0 are three-state, with separate OVDD supply supporting direct interfacing to 3V or 5V logic, while analog and digital grounds (AGND/DGND/OGND) are segregated for noise isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees monotonic transfer function for accurate signal reconstruction. |
| Sampling Rate | 800ksps maximum - supports Nyquist-limited input frequencies up to 400kHz with full DC accuracy. |
| S/(N + D) | 72.5dB at 400kHz - enables >11.7 effective bits for high-fidelity spectral analysis applications. |
| INL / DNL | ±1LSB over temperature - ensures <0.025% gain/offset linearity error across industrial range (–40°C to +85°C). |
| Input Range | ±2.5V differential - allows direct connection to op-amp outputs without level-shifting circuitry. |
| Power Dissipation | 80mW typical at ±5V - balances speed and thermal budget in compact embedded DAQ designs. |
| Common-Mode Rejection | 60dB - suppresses ground-loop noise and enables clean measurement from noisy environments. |
Pinout & Package
Package: 28-pin SOIC wide-body (SW), RoHS-compliant, JEDEC MS-013AC, θJA = 130°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +AIN (1) | Differential analog input positive | Accepts signal up to AVDD; paired with –AIN for common-mode noise rejection. |
| –AIN (2) | Differential analog input negative | Completes differential pair; common-mode voltage may range from VSS to AVDD. |
| VREF (3) | 2.5V reference output | Internal bandgap reference buffered via 4kΩ series resistor; can be overdriven externally. |
| REFCOMP (4) | Reference amplifier compensation | Requires ≥1µF bypass to AGND; stabilizes reference amplifier for low-noise operation. |
| AGND (5) | Analog ground reference | Must be tied to DGND and OGND at single point to minimize ground bounce coupling. |
| D11–D4 (6–13) | 12-bit parallel data outputs (MSB first) | Three-state; driven only when CS low and RD low; compatible with 3V/5V logic via OVDD. |
| DGND (14) | Digital logic ground | Separate from AGND but tied together at system star point to isolate switching noise. |
| OVDD (27) | Output driver supply | Set to 3V or 5V to match host logic; decoupled with 10µF + 0.1µF ceramic to AGND. |
| SHDN (21) | Shutdown enable input | Active-low; mode selected by NAP/SLP pin state (Nap = fast wake-up, Sleep = ultra-low power). |
| BUSY (25) | Conversion status indicator | Active-low; data valid on rising edge - eliminates need for external timing delays in µP interface. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Immediate data availability after BUSY rise - simplifies real-time control loop timing and FIFO buffering. |
| Dual shutdown modes | Nap (4mW) enables sub-µs wake-up; Sleep (10µW) extends battery life in portable instrumentation. |
| True differential input stage | 20MHz full-power bandwidth with 60dB CMRR - rejects EMI and ground noise without external instrumentation amps. |
| Internal 2.5V reference | ±15ppm/°C tempco and ±0.02V initial accuracy - eliminates external reference component count and layout complexity. |
| Separate OVDD supply | Direct interface to mixed-voltage systems (e.g., 5V ADC core + 3V FPGA) without level translators. |
Applications
| Telecommunications Baseband Processing | Digital Signal Processing Front-End |
|---|---|
Use Scenario: Digitizing IF signals in cellular base station receivers prior to FFT-based channelization. IC Role / Device Role / Timing Role: High-speed SAR ADC capturing 400kHz-bandwidth signals with minimal harmonic distortion for clean spectral analysis. Use Value: 72.5dB S/(N+D) and –86dB THD preserve adjacent-channel interference margin in multi-carrier LTE systems. | Use Scenario: Real-time sensor data acquisition in industrial motor control DSPs requiring synchronized current/voltage sampling. IC Role / Device Role / Timing Role: Precision analog front-end converting isolated shunt measurements with deterministic 900ns conversion time. Use Value: ±1LSB INL ensures <0.025% torque estimation error; BUSY-driven timing eliminates software polling overhead. |
| Multiplexed Data Acquisition Systems | Imaging System Digitization |
Use Scenario: Channelized voltage monitoring across 16 thermocouple inputs using analog multiplexer and shared ADC. IC Role / Device Role / Timing Role: High-throughput converter accepting rapid input switches with 150ns acquisition time and 5pF input capacitance. Use Value: Low 17pF off-capacitance minimizes crosstalk between channels; Nap mode reduces average power during idle intervals. | Use Scenario: Converting CCD/CMOS sensor analog outputs in medical ultrasound beamformers. IC Role / Device Role / Timing Role: Low-jitter (5psRMS aperture jitter) ADC preserving time-of-flight resolution in echo digitization. Use Value: 20MHz full-power bandwidth captures transient pulse edges; differential input rejects common-mode noise from high-voltage pulsers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7892BRZ-1 | 12-bit, 600ksps, ±10V input range, no internal reference, requires external REF. | Better suited for industrial ±10V sensor interfaces; lacks differential input and CMRR. | Select when wider unipolar/bipolar input range is required and external reference is acceptable. |
| MAX1167BCAP+ | 12-bit, 250ksps, internal reference, SPI interface, no parallel bus, smaller 20-pin TQFN package. | Lower power (12mW), space-constrained portable designs; incompatible pinout and interface protocol. | Select for battery-powered handheld test equipment where serial interface and footprint are prioritized over speed. |
Compared with AD7892BRZ-1 and MAX1167BCAP+, the LTC1409IG#PBF uniquely combines 800ksps throughput, differential input with 60dB CMRR, internal reference, and parallel µP interface-making it optimal for fixed-platform, high-fidelity DAQ where timing determinism and noise immunity are critical.
Availability
LTC1409IG#PBF is available at Aetrix Electronics and suitable for telecommunications infrastructure, digital signal processing hardware, and multiplexed data acquisition systems requiring stable component supply across extended temperature ranges.
Supply support for LTC1409IG#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 LTC1409IG#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, engineered for high-speed, low-distortion analog-to-digital conversion in demanding instrumentation and baseband signal chain applications.
FAQ
What is the operating temperature range for the LTC1409IG#PBF?
The LTC1409IG#PBF is rated for industrial operation from –40°C to +85°C (I-grade). This is confirmed in the Absolute Maximum Ratings table and applies to all DC and AC specifications including ±1LSB INL/DNL, 72.5dB S/(N+D), and 800ksps sampling rate performance.
Does the LTC1409IG#PBF require an external reference?
No, the LTC1409IG#PBF operates with its internal 2.5V bandgap reference (±15ppm/°C tempco, ±0.02V initial accuracy). However, the VREF pin can be overdriven with an external reference such as LT1019A-2.5 if higher initial accuracy or different voltage scaling is needed for the LTC1409IG#PBF application.
How does the NAP/SLP pin affect shutdown behavior of the LTC1409IG#PBF?
The NAP/SLP pin selects between two shutdown modes: logic-high enables Nap mode (4mW, ~200ns wake-up); logic-low enables Sleep mode (10µW, longer wake-up). SHDN must be pulled low to activate either mode. This dual-mode control allows dynamic power optimization in the LTC1409IG#PBF based on system activity requirements.
What is the significance of the BUSY signal timing in the LTC1409IG#PBF interface?
The BUSY signal on the LTC1409IG#PBF goes low at conversion start and rises when data is valid on D11–D0. Data is guaranteed stable on the rising edge of BUSY, eliminating pipeline delay and enabling synchronous latch capture without additional timing margins - a key advantage for deterministic µP or FPGA interfacing with the LTC1409IG#PBF.
Can the LTC1409IG#PBF accept single-ended inputs?
Yes, the LTC1409IG#PBF supports single-ended operation by grounding –AIN and applying the signal to +AIN. The datasheet confirms linearity specs apply under this configuration (Note 6), though common-mode rejection and noise immunity are reduced compared to true differential use - a trade-off explicitly documented for the LTC1409IG#PBF.
LTC1409IG#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 800k
- Number of Inputs:
- 1
- Input Type:
- Differential, 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
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1409IG#PBF FAQ
1.How can I place an order for LTC1409IG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1409IG#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 LTC1409IG#PBF reliable?
The price and inventory of LTC1409IG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1409IG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1409IG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1409IG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1409IG#PBF?
LTC1409IG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1409IG#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 LTC1409IG#PBF?
For technical support, including LTC1409IG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1409IG#PBF requirements.
6.How does Aetrix verify that LTC1409IG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1409IG#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 LTC1409IG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1409IG#PBF?
All LTC1409IG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1409IG#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 LTC1409IG#PBF part is unused and in its original packaging.
Return procedure for LTC1409IG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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