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Analog Devices Inc. AD7524SR-EP-RL7
- Part No.:
- AD7524SR-EP-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital to Analog Converters (DAC)
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7524SR-EP-RL7.pdf
- Description:
- IC DAC 8BIT A-OUT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,362
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Product details
Overview
AD7524SR-EP-RL7 from Analog Devices is an 8-bit CMOS multiplying DAC with on-chip data latches, designed for direct microprocessor interface (8085, 6800, Z80) and 2-/4-quadrant analog signal control. It delivers ±1/2 LSB relative accuracy at +25°C, 250 ns output settling time (VDD = +15 V), and operates from +5 V to +15 V supply. Used in precision AGC circuits and microprocessor-controlled attenuators where endpoint linearity and monotonicity across –55°C to +125°C are required.
For engineers reviewing the AD7524SR-EP-RL7 datasheet, AD7524SR-EP-RL7 pinout, AD7524SR-EP-RL7 application, or AD7524SR-EP-RL7 equivalent, key selection criteria include guaranteed monotonicity over full temperature range, TTL/CMOS-compatible digital inputs, low 10 mW typical power dissipation, and compatibility with unipolar/bipolar reference configurations without external Schottky clamps.
Technical Context
The AD7524SR-EP-RL7 implements an inverted thin-film R-2R ladder architecture with eight N-channel current switches, enabling precise 2-quadrant (unipolar) or 4-quadrant (bipolar) multiplication. Its write cycle mimics RAM "write" timing, with CS and WR controlling HOLD/WRITE modes via asynchronous latch-free operation.
It features dual analog outputs (OUT1, OUT2), reference input (VREF) with 5 kΩ min/20 kΩ max impedance, and internal feedback resistor–based gain error adjustment. Output leakage is ±400 nA max at OUT1/OUT2 under specified conditions, and AC feedthrough is limited to 0.5% FSR at 100 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8 bits - defines smallest output step as 1/256 of full-scale range in unipolar mode. |
| Relative Accuracy | ±1/2 LSB max - ensures transfer function deviation from end-point line is bounded for precision gain setting. |
| Output Settling Time | 250 ns max (VDD = +15 V) - enables high-speed microprocessor bus interfacing without wait states. |
| Supply Range | +5 V to +15 V - allows direct connection to legacy 5 V or industrial 12–15 V logic and analog rails. |
| Operating Temperature | –55°C to +125°C - qualified for extended-range military and aerospace applications per MIL-STD-883B. |
| Power Dissipation | 2 mA max IDD (all digital inputs at VIH/VIL) - supports low-power embedded systems with minimal thermal load. |
| Input Compatibility | TTL/CMOS - eliminates level-shifting circuitry when interfacing with 5 V microprocessors. |
Pinout & Package
AD7524SR-EP-RL7 is housed in a 20-terminal ceramic leadless chip carrier (E-20A) package with hermetic sealing and gold-plated terminations for high-reliability environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive Power Supply | Accepts +5 V to +15 V; powers internal logic and R-2R ladder; requires local decoupling. |
| GND | Ground Reference | Analog and digital common return; must be low-impedance to minimize noise coupling into OUT1/OUT2. |
| VREF | Reference Voltage Input | Bipolar/unipolar scaling input; ±25 V absolute max; sets full-scale output range via R-2R ladder current. |
| OUT1 / OUT2 | Dual Complementary Current Outputs | Switched R-2R ladder currents; OUT1 sources current when DBn = 0, OUT2 when DBn = 1; used with external op amp. |
| DB0–DB7 | Parallel Digital Data Inputs | 8-bit latched inputs; TTL/CMOS compatible; no external Schottky clamps needed due to improved input structure. |
| CS | Chip Select | Active-low enable; places device in WRITE mode only when low with WR low; otherwise holds last value. |
| WR | Write Strobe | Active-low latch control; samples DB0–DB7 on falling edge when CS is low; defines write cycle timing window. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip data latches | Eliminates need for external latch ICs; simplifies 8085/6800 bus interface with single-cycle write access. |
| Endpoint linearity | ±1/2 LSB max nonlinearity ensures accurate amplitude scaling in closed-loop gain control systems. |
| Monotonicity guaranteed | Over full –55°C to +125°C range - prevents signal distortion in temperature-varying instrumentation. |
| Low power consumption | Typical 10 mW at +15 V - reduces thermal stress in dense PCB layouts and sealed enclosures. |
| 2-/4-quadrant multiplication | Supports both unipolar (0 to –VREF) and bipolar (–VREF to +VREF) output modes using same hardware. |
Applications
| Microprocessor-Controlled Attenuator | Precision AGC Circuit |
|---|---|
Use Scenario: Variable RF or audio signal attenuation controlled by embedded MCU based on RSSI or level detection. IC Role / Device Role / Timing Role: Multiplying DAC providing programmable gain coefficient to voltage-controlled amplifier (VCA) or analog multiplier. Use Value: Enables 256-step attenuation resolution with monotonic response across military temperature range, eliminating step errors in feedback loops. |
Use Scenario: Maintaining constant output amplitude in receiver front-ends despite varying input signal strength. IC Role / Device Role / Timing Role: Sets analog gain of IF amplifier stage via feedback-derived digital word from ADC and controller. Use Value: ±1/2 LSB accuracy ensures stable loop convergence; fast 250 ns settling supports real-time correction in burst-mode receivers. |
| Bus-Structured Instrumentation | Microprocessor-Controlled Function Generator |
Use Scenario: Modular test equipment with shared backplane bus where multiple DACs set calibration offsets or sensor excitation levels. IC Role / Device Role / Timing Role: Bus-interface DAC receiving commands from central controller via parallel address/data lines. Use Value: TTL/CMOS compatibility and latch-free design allow direct connection to 8085-style bus without glue logic or timing adjustments. |
Use Scenario: Generating arbitrary waveforms (sine, triangle, sawtooth) via lookup table stored in MCU memory. IC Role / Device Role / Timing Role: Converts digital waveform samples to analog current outputs synchronized to system clock. Use Value: Dual OUT1/OUT2 outputs simplify differential current-to-voltage conversion; R-2R ladder stability ensures waveform fidelity over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiplying DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7533KRZ-REEL | 10-bit resolution, ±1/2 LSB integral nonlinearity, SOIC-20 package, +15 V only supply. | Higher resolution but no –55°C to +125°C grade; lacks EP screening and MIL-STD-883B option. | Select when 10-bit precision is required and extended temperature is not mandatory. |
| MAX538BCPE+ | 8-bit, ±1 LSB accuracy, +5 V only supply, built-in output buffer, PDIP-16 package. | Integrated op-amp eliminates external amplifier but limits reference flexibility and bandwidth vs. AD7524SR-EP-RL7's current-output architecture. | Select for simplified unbuffered voltage-output designs where rail-to-rail swing and low board space are priorities. |
Compared with AD7524SR-EP-RL7, AD7533KRZ-REEL offers higher resolution but sacrifices extended temperature qualification and EP reliability; MAX538BCPE+ integrates buffering at the cost of reference versatility and settling speed - making AD7524SR-EP-RL7 optimal for high-stability, wide-temp, current-output gain control.
Availability
AD7524SR-EP-RL7 is available at Aetrix Electronics and suitable for precision AGC circuits, microprocessor-controlled attenuators, and bus-structured instrumentation requiring stable component supply across extended temperature and long lifecycle programs.
Supply support for AD7524SR-EP-RL7 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The AD7524 product line was engineered for microprocessor-integrated analog signal conditioning - delivering latch-compatible, low-power, wide-supply-range DACs optimized for gain, attenuation, and function generation in harsh environments.
FAQ
What is the operating temperature range of the AD7524SR-EP-RL7?
The AD7524SR-EP-RL7 is rated for –55°C to +125°C operation and is processed to MIL-STD-883B Class B specifications. This extended range is confirmed in the Ordering Guide and Absolute Maximum Ratings tables, supporting deployment in aerospace, defense, and downhole industrial systems where ambient extremes are routine. The AD7524SR-EP-RL7 maintains monotonicity and ±1/2 LSB relative accuracy across this full span.
Does the AD7524SR-EP-RL7 require external Schottky diodes on digital inputs?
No, the AD7524SR-EP-RL7 does not require external Schottky clamps. The datasheet explicitly states that a "newly improved design eliminates the protection Schottky previously required" and guarantees TTL compatibility with +5 V supply. This is verified in the General Description and Features sections, reducing BOM count and layout complexity compared to earlier DAC generations.
How does the AD7524SR-EP-RL7 achieve 2-quadrant versus 4-quadrant operation?
The AD7524SR-EP-RL7 supports both modes via reference polarity and digital code format: 2-quadrant uses unipolar binary coding with VREF applied positive or negative to generate 0 to –VREF or 0 to +VREF outputs; 4-quadrant uses offset binary coding with bipolar VREF (±VREF) to produce symmetric –VREF to +VREF output. This is detailed in Tables I and II and Figures 4–5 of the datasheet, and applies directly to the AD7524SR-EP-RL7 as an S-grade variant.
What is the maximum allowable reference voltage for the AD7524SR-EP-RL7?
The AD7524SR-EP-RL7 accepts VREF up to ±25 V, as specified in the Absolute Maximum Ratings table. This wide range enables direct interfacing with high-voltage references or transformer-coupled signals without attenuation. However, full-scale output compliance depends on VDD and external op-amp rail limits - the AD7524SR-EP-RL7 itself does not regulate or limit VREF beyond the ±25 V absolute maximum.
Is the AD7524SR-EP-RL7 pin-compatible with other AD7524 variants like AD7524LN or AD7524UQ?
No, the AD7524SR-EP-RL7 is not pin-compatible with AD7524LN (N-16 DIP) or AD7524UQ (Q-16 Cerdip), as it uses the E-20A ceramic leadless chip carrier package with 20 terminals. Pin count, pitch, and physical layout differ fundamentally across N-, P-, Q-, R-, and E-package options. The AD7524SR-EP-RL7 shares pinout only with other E-20A variants such as AD7524SE and AD7524TE, per the Outline Dimensions and Pin Configurations section.
AD7524SR-EP-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Number of Bits:
- 8
- Number of D/A Converters:
- 1
- Settling Time:
- 500ns
- Output Type:
- Current - Unbuffered
- Differential Output:
- Yes
- Data Interface:
- Parallel
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V ~ 15V
- Voltage - Supply, Digital:
- 5V ~ 15V
- INL/DNL (LSB):
- ±0.5 (Max), -
- Architecture:
- R-2R
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- 16-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7524SR-EP-RL7 FAQ
1.How can I place an order for AD7524SR-EP-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7524SR-EP-RL7 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 AD7524SR-EP-RL7 reliable?
The price and inventory of AD7524SR-EP-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7524SR-EP-RL7 is usually 5 days.
3.What payment methods are accepted for AD7524SR-EP-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7524SR-EP-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7524SR-EP-RL7?
AD7524SR-EP-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7524SR-EP-RL7 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 AD7524SR-EP-RL7?
For technical support, including AD7524SR-EP-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7524SR-EP-RL7 requirements.
6.How does Aetrix verify that AD7524SR-EP-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7524SR-EP-RL7 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 AD7524SR-EP-RL7 meets industry standards.
7.What is the process for return or replacement of AD7524SR-EP-RL7?
All AD7524SR-EP-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7524SR-EP-RL7, 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 AD7524SR-EP-RL7 part is unused and in its original packaging.
Return procedure for AD7524SR-EP-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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