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Texas Instruments ADS6245IRGZT
- Part No.:
- ADS6245IRGZT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ADS6245IRGZT.pdf
- Description:
- IC ADC 14BIT PIPELINED 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:129
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Product details
Overview
ADS6245IRGZT from Texas Instruments is a dual-channel, 14-bit, 125 MSPS analog-to-digital converter with serialized LVDS outputs, simultaneous sample-and-hold architecture, and internal 3.5 dB coarse gain. It operates from 3.3-V analog/digital supplies, features programmable fine gain up to +6 dB, and targets high-density IF sampling in base-station receivers.
For engineers reviewing the ADS6245IRGZT datasheet, ADS6245IRGZT pinout, ADS6245IRGZT application, or ADS6245IRGZT equivalent, key selection criteria include its 125 MSPS maximum sampling rate, 73.4 dBFS SINAD at 10 MHz input, 79 dBc SFDR at 170 MHz with 3.5 dB gain, 48-pin QFN package, and support for both 1-wire and 2-wire LVDS serialization modes.
Technical Context
The ADS6245IRGZT implements a dual independent ADC core with simultaneous sampling, each feeding a digital encoder and serializer. An internal PLL multiplies the input clock to generate the bit clock required for 14× (or 16×) serialization, enabling LVDS output rates below 1 Gbps in 2-wire DDR mode.
It supports flexible configuration via parallel pins (CFG1–CFG4, PDNA/PDNB, SEN) or serial interface (SEN/SCLK/SDATA), with priority arbitration between them. Output data format (MSB/LSB first, 2's complement/offset binary), interface mode (1-wire/2-wire, SDR/DDR), and coarse/fine gain are all programmable without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes - guarantees monotonicity and full code coverage across temperature. |
| Max Sampling Rate | 125 MSPS - enables digitization of wideband IF signals up to ~62.5 MHz Nyquist bandwidth. |
| SINAD @ 10 MHz | 73.4 dBFS (0 dB gain) - defines effective dynamic range for medium-frequency signal capture. |
| SFDR @ 170 MHz | 79 dBc (3.5 dB coarse gain) - determines spurious-free resolution in high-frequency receiver front-ends. |
| Power per Channel | 500 mW at 125 MSPS - sets thermal and supply design requirements for dual-channel operation. |
| Package | 48-pin QFN (7 mm × 7 mm) with exposed thermal pad - enables high-density PCB layout and efficient heat dissipation. |
| Supply Voltages | 3.3 V AVDD and LVDD - simplifies power delivery with single-rail LDO or DC/DC solution. |
Pinout & Package
ADS6245IRGZT is housed in a 48-pin QFN package (RGZ) with 0.5-mm pitch and exposed thermal pad. Pin functions are defined per TI SLAS542B Rev. December 2013.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA_P / INA_M | Differential analog input channel A | Accepts 2-Vpp differential signal; common-mode voltage fixed at 1.5 V in internal reference mode. |
| INB_P / INB_M | Differential analog input channel B | Independent second channel with identical AC performance and timing as channel A. |
| CLKP / CLKM | Differential clock input | Supports sine, LVCMOS, LVPECL, or LVDS clocks; minimum amplitude 400 mVpp. |
| DCLKP / DCLKM | LVDs bit clock output | DDR clock derived from PLL; frequency = Fs × serialization factor ÷ 2. |
| FCLKP / FCLKM | LVDs frame clock output | Indicates start of new 14-bit word per channel; synchronous with serialized data. |
| DA0_P / DA0_M / DA1_P / DA1_M | LVDS data outputs channel A | 2-wire DDR interface: DA0 carries even bits, DA1 carries odd bits of 14-bit word. |
| DB0_P / DB0_M / DB1_P / DB1_M | LVDS data outputs channel B | Same 2-wire DDR structure as channel A; fully independent timing and framing. |
| PDNA / PDNB | Channel A/B power-down control | Hardware pin enables individual channel shutdown without serial register access. |
| CFG1–CFG4 | Parallel configuration inputs | Resistor-divider programmable pins set interface mode, data format, and serialization ratio at power-up. |
| SEN / SCLK / SDATA | Serial interface control | 3-wire SPI-compatible interface for runtime reconfiguration of gain, timing, and test patterns. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous Sample-and-Hold | Ensures precise phase alignment between dual channels for I/Q demodulation and beamforming. |
| Programmable Coarse + Fine Gain | 3.5 dB coarse gain improves SFDR at high frequencies; +1 dB step fine gain (up to +6 dB) enables SNR/SFDR trade-off tuning. |
| 2-Wire DDR LVDS Interface | Halves serial data rate vs. 1-wire mode - eases FPGA receiver design and reduces inter-pair skew sensitivity. |
| Internal Reference with External Option | Eliminates need for external reference IC; external reference mode supports precision system-level calibration. |
| No External Decoupling for References | Integrated reference buffer stability removes requirement for dedicated reference bypass capacitors, saving board space. |
Applications
| Base-Station IF Receivers | Diversity Receivers |
|---|---|
Use Scenario: Digitizing 70–180 MHz IF signals from RF front-end mixers in LTE/FDD/TDD macro base stations. IC Role / Device Role / Timing Role: Dual-channel ADC performing synchronized I/Q sampling with 125 MSPS rate and <250 fs aperture jitter. Use Value: 79 dBc SFDR at 170 MHz enables clean adjacent-channel rejection; 2-wire LVDS reduces FPGA pin count by 50% vs. parallel interface. | Use Scenario: Capturing spatially separated antenna signals in MIMO systems requiring phase-coherent dual-path digitization. IC Role / Device Role / Timing Role: Simultaneous sampling ADC delivering time-aligned 14-bit streams for real-time correlation and beam steering. Use Value: Channel-to-channel aperture delay variation ≤ ±80 ps ensures sub-degree phase accuracy; internal reference eliminates inter-channel offset drift. |
| Medical Ultrasound Imaging | High-Speed Test Equipment |
Use Scenario: Receiving echo signals from phased-array transducers with center frequencies up to 15 MHz and bandwidth >5 MHz. IC Role / Device Role / Timing Role: High-SNR digitizer capturing low-amplitude return pulses with minimal harmonic distortion. Use Value: 73.4 dBFS SINAD at 10 MHz and –15 LSB INL support accurate tissue characterization; programmable gain adapts to variable echo depth. | Use Scenario: Front-end acquisition in automated test equipment measuring RF component linearity and spectral purity. IC Role / Device Role / Timing Role: Precision ADC generating golden reference waveforms for DAC testing and spectrum analyzer calibration. Use Value: No missing codes and ±3 LSB INL ensure traceable metrology-grade measurements; LVDS serialization enables deterministic data capture at 125 MSPS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS62P45IRGZT | Pin-compatible upgrade with improved SFDR (+3 dB at 170 MHz) and lower power (450 mW/channel). | Same 48-QFN footprint and interface; requires updated firmware for register map changes. | Select when higher spurious-free dynamic range and reduced thermal load are critical. |
| AD9233BCPZ-125 | 12-bit, 125 MSPS dual ADC with JESD204B output; no internal reference; higher SNR (70.2 dBFS) but lower resolution. | Requires FPGA with JESD204B PHY; lacks coarse/fine gain control and simultaneous sampling guarantee. | Select for JESD204B ecosystem compatibility and where 12-bit resolution suffices. |
Compared with ADS62P45IRGZT, the ADS6245IRGZT offers proven production maturity and identical pinout but trades 3 dB SFDR for broader legacy software support; versus AD9233BCPZ-125, it delivers 2 extra bits of resolution and integrated analog features at the cost of non-standard LVDS serialization.
Availability
ADS6245IRGZT is available at Aetrix Electronics and suitable for base-station IF receivers, medical ultrasound systems, and high-speed test equipment requiring stable component supply across extended product lifecycles.
Supply support for ADS6245IRGZT 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 data converters for industrial, communications, and medical markets.
The ADS62xx family was designed specifically for high-density, low-power IF sampling in wireless infrastructure and instrumentation, emphasizing simultaneous dual-channel accuracy, LVDS interface scalability, and flexible gain control.
FAQ
What is the maximum sampling rate supported by the ADS6245IRGZT?
The ADS6245IRGZT supports a maximum sampling rate of 125 MSPS, as specified in the absolute maximum ratings and confirmed across all electrical characteristics tables in the TI SLAS542B datasheet. This rate applies to both channels simultaneously under recommended operating conditions (AVDD = LVDD = 3.3 V, –40°C to 85°C). Operation above this rate is not guaranteed and may result in degraded AC performance or functional failure.
Does the ADS6245IRGZT require external decoupling capacitors for its internal reference?
No, the ADS6245IRGZT does not require external decoupling capacitors for its internal reference. The device integrates a stabilized reference buffer that maintains performance without external bypass components, as explicitly stated in the "Features" section and verified in the "Reference Voltages" subsection of the Electrical Characteristics table in the TI SLAS542B datasheet.
How many LVDS data pairs does the ADS6245IRGZT use in 2-wire DDR mode?
In 2-wire DDR mode, the ADS6245IRGZT uses four LVDS data pairs: two for channel A (DA0_P/M and DA1_P/M) and two for channel B (DB0_P/M and DB1_P/M). Each pair carries alternating bits of the 14-bit word, effectively halving the serial data rate compared to 1-wire mode while maintaining full throughput - a configuration confirmed in Figure 1 and the "Output Interface" description of the SLAS542B datasheet.
Can the ADS6245IRGZT operate with an external reference voltage?
Yes, the ADS6245IRGZT supports external reference operation. When the SEN pin is biased to (3/8)LVDD or 0 V, the device accepts an external differential reference applied across REFP and REFM pins, with common-mode voltage specified at 1.45–1.55 V. This mode is fully characterized and documented in Table 6 ("SEN Control Pin") and the "Reference Voltages" section of the Electrical Characteristics table.
What is the aperture jitter specification for the ADS6245IRGZT?
The ADS6245IRGZT has an aperture jitter specification of 250 fs rms, as listed in the "Timing Specifications" table (parameter tJ) of the TI SLAS542B datasheet. This value is constant across the full ADS624X family and applies under typical conditions (25°C, AVDD = LVDD = 3.3 V, maximum sampling rate). It directly impacts SNR degradation at high input frequencies and is measured using industry-standard methods per IEEE Std 1241.
ADS6245IRGZT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 125M
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 3V ~ 3.6V
- Voltage - Supply, Digital:
- 3V ~ 3.6V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-VQFN (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS6245IRGZT FAQ
1.How can I place an order for ADS6245IRGZT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS6245IRGZT 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 ADS6245IRGZT reliable?
The price and inventory of ADS6245IRGZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS6245IRGZT is usually 5 days.
3.What payment methods are accepted for ADS6245IRGZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS6245IRGZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS6245IRGZT?
ADS6245IRGZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS6245IRGZT 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 ADS6245IRGZT?
For technical support, including ADS6245IRGZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS6245IRGZT requirements.
6.How does Aetrix verify that ADS6245IRGZT is sourced from the original manufacturer or authorized distributors?
All ADS6245IRGZT 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 ADS6245IRGZT meets industry standards.
7.What is the process for return or replacement of ADS6245IRGZT?
All ADS6245IRGZT units undergo pre-shipment inspection (PSI). If there is an issue with ADS6245IRGZT, 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 ADS6245IRGZT part is unused and in its original packaging.
Return procedure for ADS6245IRGZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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