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Analog Devices Inc. AD9740WARUZRL7
- Part No.:
- AD9740WARUZRL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital to Analog Converters (DAC)
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD9740WARUZRL7.pdf
- Description:
- IC DAC 10BIT A-OUT 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,173
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Product details
Overview
AD9740WARUZRL7 from Analog Devices is a 10-bit, 210 MSPS current-output digital-to-analog converter optimized for wideband transmit signal paths in communication systems. It delivers 65 dB SNR at 5 MHz output with 125 MSPS clocking, supports differential current outputs from 2 mA to 20 mA, features an integrated 1.2 V temperature-compensated band gap reference, and operates on a single 3.3 V supply with 135 mW power dissipation - enabling direct IF synthesis in base station transceivers.
For engineers reviewing the AD9740WARUZRL7 datasheet, AD9740WARUZRL7 pinout, AD9740WARUZRL7 application, or AD9740WARUZRL7 equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-qualified performance specs (−40°C to +105°C), real-world dynamic metrics (SFDR up to 90 dBc in 2 MHz span), and precise alternative part guidance for TxDAC-family system design.
Technical Context
The AD9740WARUZRL7 implements a segmented PMOS current source array with 31 equal MSB sources, 15 scaled middle-bit sources, and binary-weighted LSB switches - eliminating R-2R ladder limitations for multitone linearity. Its edge-triggered CMOS latches accept data at up to 210 MSPS with 2.0 ns setup and 1.5 ns hold time, synchronized to a single-ended clock input.
It uses a proprietary differential switching architecture derived from the AD9764 family to minimize glitch impulse (5 pV·s) and timing skew, while separate AVDD/DVDD supplies (2.7–3.6 V) isolate analog and digital domains. The on-chip reference control amplifier regulates full-scale current via external RSET, enabling 10:1 IOUTFS adjustment (2–20 mA) with ratiometric gain stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - supports 1024 discrete output levels for high-fidelity waveform reconstruction in DDS and IF synthesis. |
| Max Update Rate | 210 MSPS - enables Nyquist-rate sampling of signals up to 105 MHz, suitable for direct RF modulation in wireless infrastructure. |
| INL / DNL | ±0.15 LSB / ±0.12 LSB typical - ensures monotonicity and low harmonic distortion in precision signal generation. |
| SFDR (65 MSPS) | 90 dBc in 2.5 MHz span - suppresses spurs sufficiently for multi-carrier LTE/WiMAX base station transmit chains. |
| Output Compliance | −1 V to +1.25 V - defines safe voltage swing range across IOUTA/IOUTB when driving 50 Ω transformer-coupled loads. |
| Power Dissipation | 135 mW at 3.3 V - enables integration into thermally constrained portable or dense RF module designs without active cooling. |
| Operating Temp | −40°C to +105°C - qualified per AEC-Q100 for under-hood automotive radar and V2X transmitter applications. |
Pinout & Package
AD9740WARUZRL7 is housed in a 28-lead TSSOP package (JEDEC MO-153, 4.4 mm × 9.7 mm), with exposed pad for thermal enhancement. Pin 1 is located at top-left corner adjacent to dot marking; pins are numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DB9–DB0 | Parallel digital data inputs (MSB to LSB) | Accept 10-bit twos-complement or straight-binary words; require 2.0 ns setup/1.5 ns hold relative to CLOCK rising edge. |
| CLOCK | Single-ended CMOS clock input | Edge-triggered latch control; supports up to 210 MSPS with 50% duty cycle; referenced to DCOM. |
| IOUTA / IOUTB | Differential current outputs | IOUTA = (CODE/1023)×IOUTFS; IOUTB = (1023−CODE)/1024×IOUTFS - enable transformer-coupled or op-amp-based differential voltage conversion. |
| REFIO / REFLO | Reference input/output and ground | REFIO delivers 1.2 V internal reference (decoupled with 0.1 µF to ACOM); REFLO connects to ACOM for both internal/external reference modes. |
| SLEEP | Power-down control | Active-high signal reducing standby power to 15 mW; includes internal pull-down - may float if unused. |
| MODE | Data format select | Connect to DVDD for twos-complement; to DCOM for straight binary - configures digital interface behavior at power-up. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible TxDAC family member | Shares identical 28-lead TSSOP footprint and pinout with AD9708 (8-bit), AD9742 (12-bit), and AD9744 (14-bit) - enables resolution scalability without PCB redesign. |
| Segmented current source architecture | 31 MSB + 15 middle-bit + binary LSB current sources eliminate R-2R mismatch errors, preserving SFDR >80 dBc at high output frequencies. |
| Integrated 1.2 V band gap reference | Temperature-compensated (±50 ppm/°C drift), eliminates need for external reference IC and reduces BOM count in compact RF modules. |
| Adjustable full-scale current (2–20 mA) | Set via external RSET resistor; enables trade-off between dynamic performance (higher IOUTFS → better SNR) and power (lower IOUTFS → 60 mW operation). |
| Automotive qualification | AEC-Q100 Grade 2 certified (−40°C to +105°C), with guaranteed parametric performance across temperature - suitable for radar front-end DACs and V2X transmitters. |
Applications
| Direct IF Transmitter | Wireless Base Station |
|---|---|
|
Use Scenario: Generating 70–250 MHz IF signals for upconversion in macrocell BTS radios using zero-IF or low-IF architectures. IC Role / Device Role / Timing Role: Primary wideband DAC in transmit chain; converts baseband IQ samples to analog IF current outputs synchronized to FPGA-generated clock. Use Value: 90 dBc SFDR in 2.5 MHz span suppresses adjacent-channel interference in multi-carrier WCDMA/LTE deployments. |
Use Scenario: Transmit path in 4G/5G small cell units requiring compact, low-power DACs with high spectral purity. IC Role / Device Role / Timing Role: Current-output DAC feeding transformer-coupled PA driver stage; operates at 125–210 MSPS update rates. Use Value: 210 MSPS max rate supports 100 MHz instantaneous bandwidth for massive MIMO precoding waveforms. |
| Digital Radio Link | Automotive Radar Transmitter |
|
Use Scenario: High-reliability point-to-point microwave backhaul operating in licensed 11 GHz or 18 GHz bands. IC Role / Device Role / Timing Role: DAC generating chirped FMCW waveforms; driven by deterministic timing engine with jitter <1 ps RMS. Use Value: 65 dB SNR at 5 MHz output ensures clean local oscillator injection for low-phase-noise upconversion. |
Use Scenario: 77 GHz ADAS radar ECU transmitting linear FM chirps with sub-millimeter range resolution. IC Role / Device Role / Timing Role: Automotive-qualified DAC in radar signal generator ASIC subsystem; interfaces to TI C674x DSP via parallel bus. Use Value: −40°C to +105°C operation and AEC-Q100 compliance guarantee stable chirp linearity across vehicle thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9742ARUZ | 12-bit resolution, same 28-lead TSSOP package and pinout; higher SFDR (92 dBc) but 165 MSPS max clock rate. | Better spurious performance for wideband instrumentation; lower max update rate limits use in 210 MSPS LTE-A carrier aggregation. | Select AD9742ARUZ when SNR/SFDR >70 dB is critical and clock rate ≤165 MSPS suffices. |
| AD9708ARUZ | 8-bit resolution, identical footprint and interface; lower power (105 mW), reduced INL (±0.25 LSB), and 125 MSPS max rate. | Cost-optimized for non-critical IF synthesis where 50 dB SFDR meets system requirements. | Choose AD9708ARUZ for legacy wireless links or test equipment where resolution and speed margins are relaxed. |
Compared with AD9742ARUZ and AD9708ARUZ, the AD9740WARUZRL7 uniquely balances 10-bit resolution, 210 MSPS speed, and automotive qualification - making it the only TxDAC variant qualified for AEC-Q100 while supporting the highest update rate in the family.
Availability
AD9740WARUZRL7 is available at Aetrix Electronics and suitable for wireless infrastructure, automotive radar, and digital radio link applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for AD9740WARUZRL7 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving communications, industrial, automotive, and healthcare markets since 1965.
The AD9740WARUZRL7 belongs to the TxDAC® family - a series of pin-compatible, high-speed, low-power DACs specifically engineered for transmit signal paths in wireless base stations, radar, and broadband communications equipment.
FAQ
What is the maximum clock frequency supported by the AD9740WARUZRL7?
The AD9740WARUZRL7 supports a maximum update rate of 210 MSPS, as confirmed in Table 2 of the datasheet under "Maximum Output Update Rate (fCLOCK)." This rating applies across the full operating temperature range (−40°C to +105°C) with AVDD/DVDD = 3.3 V and IOUTFS = 20 mA. Operation above this rate risks timing violations and degraded SFDR performance.
Does the AD9740WARUZRL7 include an internal voltage reference?
Yes, the AD9740WARUZRL7 integrates a 1.2 V temperature-compensated band gap reference with ±50 ppm/°C drift, accessible at the REFIO pin. When used internally, REFIO must be decoupled to ACOM with a 0.1 µF capacitor, and REFLO tied to ACOM. The reference cannot be disabled but may be overridden by an external source applied to REFIO.
Can the AD9740WARUZRL7 operate with different data formats?
Yes, the AD9740WARUZRL7 supports both twos-complement and straight binary input coding. The MODE pin selects format: connect MODE to DVDD for twos-complement, or to DCOM for straight binary. This selection determines how the 10-bit DB9–DB0 word maps to output current magnitude and polarity.
What is the purpose of the SLEEP pin on the AD9740WARUZRL7?
The SLEEP pin is an active-high power-down control that reduces AD9740WARUZRL7 standby power dissipation to approximately 15 mW. It contains an internal pull-down circuit, so the pin may be left unconnected if power-down functionality is not required. During sleep mode, the DAC output is disabled and digital inputs are ignored.
How is full-scale output current adjusted on the AD9740WARUZRL7?
Full-scale current (IOUTFS) is set from 2 mA to 20 mA using an external resistor (RSET) connected between FS ADJ and ACOM. Per Equation 4 in the datasheet, IREF = VREFIO/RSET, and IOUTFS = 32 × IREF. A 2 kΩ RSET yields ~20 mA IOUTFS; increasing RSET proportionally reduces IOUTFS and total power consumption.
AD9740WARUZRL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Number of Bits:
- 10
- Number of D/A Converters:
- 1
- Settling Time:
- 11µs (Typ)
- Output Type:
- Current - Unbuffered
- Differential Output:
- Yes
- Data Interface:
- Parallel
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- INL/DNL (LSB):
- ±0.15, ±0.12
- Architecture:
- Current Source
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- -
AD9740WARUZRL7 FAQ
1.How can I place an order for AD9740WARUZRL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9740WARUZRL7 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 AD9740WARUZRL7 reliable?
The price and inventory of AD9740WARUZRL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9740WARUZRL7 is usually 5 days.
3.What payment methods are accepted for AD9740WARUZRL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9740WARUZRL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9740WARUZRL7?
AD9740WARUZRL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9740WARUZRL7 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 AD9740WARUZRL7?
For technical support, including AD9740WARUZRL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9740WARUZRL7 requirements.
6.How does Aetrix verify that AD9740WARUZRL7 is sourced from the original manufacturer or authorized distributors?
All AD9740WARUZRL7 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 AD9740WARUZRL7 meets industry standards.
7.What is the process for return or replacement of AD9740WARUZRL7?
All AD9740WARUZRL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD9740WARUZRL7, 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 AD9740WARUZRL7 part is unused and in its original packaging.
Return procedure for AD9740WARUZRL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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