DAC715UB - 16-Bit Parallel DAC, +10V Ref, 28-SOIC | Texas Instruments
부품 번호: DAC715UB ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $56.42 | $56.42 |
| 10 | $50.66 | $506.60 |
| 100 | $41.05 | $4,105.00 |
| 500 | $35.76 | $17,880.00 |
| 1,000 | $30.92 | $30,920.00 |
DAC715UB 개요
What is a 16-bit DAC with voltage output? A DAC (Digital-to-Analog Converter) converts a digital codeword into a precisely controlled analog voltage or current. A 16-bit DAC produces 65536 discrete output steps, giving an LSB size of about 153 microvolts on a 10 V full scale. Voltage-output DACs like the DAC715UB include an internal output amplifier so no external op-amp or shunt resistor is needed; in the broader hierarchy they sit within precision data converters (ADC/DAC), which belong to the signal-chain family of mixed-signal ICs.
Key features include a high-speed 16-bit parallel double-buffered interface that allows simultaneous update of multiple DACs, an asynchronous CLR function that forces the output to mid-scale, and convenient external gain and offset adjustments for auto-calibration. Power dissipation is 600 mW maximum. The device is offered in 14-, 15-, and 16-bit linearity grades with the L grade specified for 16-bit monotonic operation over the -40C to +85C industrial temperature range.
Architecturally, the DAC715UB uses an R-2R ladder network driven by the 16-bit input register. The double-buffered latch arrangement lets the input register be loaded first and then a single LDAC strobe simultaneously updates the analog output, enabling synchronized multi-channel operation in automated test equipment and process control systems.
Typical applications include industrial process control, automated test equipment (ATE), precision instrumentation, motor control reference generation, and programmable voltage/current sources. The on-chip +10 V reference simplifies bill-of-materials by removing the need for an external reference IC.
Design consideration: route the AGND and DGND separately and join them only at one point near the DAC ground pin. Place the 0.1 microfarand bypass capacitor as close to the supply pin as possible to preserve 16-bit linearity at high update rates.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
드롭인 대체품: DAC715UB — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
DAC715UK
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
DAC715UBG4
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
DAC714UB
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
DAC715UB 최대 정격 & 전기적 특성
| 분해능 | 16 bit |
| Number of DAC Channels | 1 |
| Architecture | R-2R Ladder |
| 출력 유형 | Buffered Voltage |
| 출력 전압 범위 | 0 V to +10 V |
| Settling Time | 10 microseconds (typ, to 1 LSB) |
| 인터페이스 유형 | Parallel (16-bit, double-buffered) |
| Internal Reference Voltage | +10 V (temperature compensated) |
| Asynchronous Clear (CLR) | Yes - forces output to mid-scale |
| Power Dissipation | 600 mW maximum |
| Operating Temperature Range (UB suffix) | -40C to +85C |
| 패키지 | 28-pin SOIC (wide-body, tube) |
| Gain/Offset Adjust | External pins provided for auto-calibration |
| Linearity Grades | 14-, 15-, and 16-bit (L grade monotonic over -40C to +85C) |
| 실장 유형 | Surface Mount |
DAC715UB 핀 구성
| 핀 1 | DB15 — Data Bit 15 (MSB, parallel input) |
| 핀 2 | DB14 — Data Bit 14 |
| 핀 3 | DB13 — Data Bit 13 |
| 핀 4 | DB12 — Data Bit 12 |
| 핀 5 | DB11 — Data Bit 11 |
| 핀 6 | DB10 — Data Bit 10 |
| 핀 7 | DB9 — Data Bit 9 |
| 핀 8 | DB8 — Data Bit 8 |
| 핀 9 | DB7 — Data Bit 7 |
| 핀 10 | DB6 — Data Bit 6 |
| 핀 11 | DB5 — Data Bit 5 |
| 핀 12 | DB4 — Data Bit 4 |
| 핀 13 | DB3 — Data Bit 3 |
| 핀 14 | DB2 — Data Bit 2 |
| 핀 15 | DB1 — Data Bit 1 |
| 핀 16 | DB0 — Data Bit 0 (LSB) |
| 핀 17 | DGND — Digital Ground |
| 핀 18 | VDD — +15 V (or specified) Analog Supply |
| 핀 19 | AGND — Analog Ground |
| 핀 20 | IOUT — DAC Current Output |
| 핀 21 | SENSE — Output Amplifier Sense (feedback) |
| 핀 22 | VOUT — Buffered Voltage Output (0 V to +10 V) |
| 핀 23 | REF — +10 V Reference (internal / external override) |
| 핀 24 | GAIN — Gain Adjustment (for auto-calibration) |
| 핀 25 | OFFSET — Offset Adjustment (for auto-calibration) |
| 핀 26 | CLR — Asynchronous Clear (active low, sets output to mid-scale) |
| 핀 27 | LDAC — Load DAC - simultaneous update strobe |
| 핀 28 | WR — Write Strobe (latches input register on rising edge) |
일반적인 애플리케이션
DAC715UB 적합 용도: 7 애플리케이션s: Automated Test Equipment (ATE) Calibration, Industrial Process Control Set-Point Generation, Precision Programmable Voltage Source, Motor Drive Reference Generation, Medical Imaging and Diagnostic Equipment, Audio Test and Measurement Instrumentation, Data Acquisition Analog Output Modules.
Automated Test Equipment (ATE) Calibration
In automated test equipment, the DAC715UB serves as the precision analog reference source that drives instrument calibrators, multi-meter stimulus paths, and switch-matrix load resistors. Its 16-bit resolution gives an LSB of about 153 microvolts on a 10 V full scale, fine enough to calibrate 6.5-digit DMMs and RF power-meter references. Settling time of 10 microseconds is fast enough for sub-millisecond ATE channel cycles. The double-buffered parallel interface lets the ATE controller load channel codes in advance, then pulse LDAC to update all sources within nanoseconds of one another, eliminating channel-to-channel skew. Placed on the analog motherboard close to the output multiplexer with separate AGND and DGND planes to maintain 16-bit linearity.
추천
Industrial Process Control Set-Point Generation
PLC and DCS modules use the DAC715UB to generate 4-20 mA current-loop set-points by driving an external voltage-to-current converter, or to drive valve actuators and heater controllers directly. The -40C to +85C industrial temperature range matches the harsh thermal environment of factory-floor cabinets. The integrated +10 V temperature-compensated reference eliminates the need for an external reference IC, reducing BOM cost and PCB area. With 16 bits the device delivers 65536 set-point steps, well above the resolution needed to match modern 16-bit ADC feedback loops. Operate the DAC from a clean +5 V analog supply and use isolated grounds when crossing safety barriers to IEC 61508 / SIL-rated zones.
추천
Precision Programmable Voltage Source
Bench-top calibrators and laboratory voltage references use the DAC715UB as the digitally programmable analog element. Its 0 V to +10 V unipolar span covers most laboratory stimulus needs, and its 16-bit resolution gives sub-millivolt set-point accuracy when paired with a low-drift external reference. The asynchronous CLR input is wired to a front-panel emergency-zero button to force the output to mid-scale within microseconds on fault detection. With a 10 microsecond settling time the device supports waveform generation up to about 50 kHz full-scale, sufficient for low-frequency audio and vibration test profiles. Mount the device on a four-layer board with a dedicated analog ground plane beneath.
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Motor Drive Reference Generation
Servo drives and vector-control inverters need precise analog set-points for torque, speed, and current loops. The DAC715UB provides a 16-bit set-point accuracy that matches typical 16-bit current-sense ADCs, eliminating quantisation mismatch in the control loop. Its double-buffered input lets the controller stage new torque profiles into all axis DACs and update them on a single LDAC edge, crucial for synchronized multi-axis motion. The industrial temperature rating and 600 mW power budget suit servo-drive chassis that already carry ample cooling. Insert RC filtering at the output for loop-stability if the bandwidth exceeds the 10 microsecond settling-time limit of the DAC amplifier.
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Medical Imaging and Diagnostic Equipment
Ultrasound beamformers, MRI gradient controllers, and patient-monitoring signal generators rely on the DAC715UB for low-noise analog set-points in their analog front ends. The internal +10 V reference and on-chip output amplifier deliver a clean voltage rail with no external active components, simplifying IEC 60601-1 patient-leakage analysis. Sixteen-bit resolution matches the dynamic range of modern 16-bit medical ADCs, supporting imaging-detail preservation. Operate from medical-grade isolated supplies and provide adequate creepage/clearance between DAC outputs and patient-connected circuitry.
추천
Audio Test and Measurement Instrumentation
Audio analyzers and distortion-meter stimulus sources use the DAC715UB to generate calibrated sine and noise waveforms with 16-bit amplitude resolution. Although the 10 microsecond settling time limits full-scale audio bandwidth to roughly 50 kHz, the device is well suited for measurement of THD+N, intermodulation distortion, and frequency response in production test of consumer-audio amplifiers. The asynchronous CLR input is convenient for resetting the stimulus to a defined zero between measurement sweeps, improving measurement repeatability. Place the DAC on a low-impedance analog ground plane to preserve linearity at the small LSB sizes typical of low-amplitude test tones.
추천
Data Acquisition Analog Output Modules
PCI, PXI, and LXI data-acquisition cards integrate the DAC715UB to provide analog-output channels alongside ADC inputs, producing complete stimulus-response systems for laboratory and production test. The parallel interface maps directly to FPGA or microcontroller parallel-bus controllers without requiring an SPI or I2C engine, simplifying firmware. The asynchronous CLR pin lets the host system assert a known safe voltage on all channels during power-up or host-hang recovery, critical in safety-aware test fixtures. Use the on-chip 10 V reference unless multi-card ratiometric calibration demands an external shared reference applied to all DAC REF pins.
추천
추천 제품 요약
엔지니어링 참조 데이터: DAC715UB — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | DAC715UK | DAC715UBG4 | DAC715PB | DAC714UB |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-SOIC (wide-body) | 28-SOIC (wide-body) - same | 28-SOIC (wide-body) - same | 28-PDIP - different footprint | 28-SOIC (wide-body) - same |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Output Range | 0 V to +10 V | 0 V to +10 V | 0 V to +10 V | 0 V to +10 V | 0 V to +10 V |
| Settling Time | 10 us | 10 us | 10 us | 10 us | 10 us |
| Internal Reference | +10 V | +10 V | +10 V | +10 V | +10 V |
| Operating Temperature | -40C to +85C | 0C to +70C | -40C to +85C | -40C to +85C | -40C to +85C |
| Interface | Parallel, double-buffered | Parallel, double-buffered | Parallel, double-buffered | Parallel, double-buffered | Parallel, double-buffered |
| Linearity Grade | 15-bit (UB, U grade) | 16-bit L grade | 15-bit UB grade | 15-bit PB grade | 14-bit (lower linearity) |
주요 차별점
- Integrated +10 V temperature-compensated reference (vs Discrete DAC with external reference)
- Double-buffered 16-bit parallel interface for simultaneous multi-channel update (vs Single-buffered or serial-interface competitor DACs)
- Asynchronous CLR forces output to mid-scale in a single cycle (vs DACs without safety clear input)
- Wide-body SOIC package with same die as PDIP (vs DAC714UB (lower linearity in same package))
설계 노트
Place the 0.1 microfarad supply bypass capacitor within 5 mm of pin 18 (VDD) and the 10 microfarad tantalum bulk capacitor within 25 mm of the same pin. Separate AGND (pin 19) and DGND (pin 17) traces back to a single star ground under the device to avoid ground-loop noise coupling into the analog output. According to the TI DAC715 datasheet, mixed-signal grounding is the single most important PCB-layout factor for preserving 16-bit linearity.
Do not load the DAC output below 2 kOhms - the internal output amplifier is rated for a 2 kOhm minimum load to remain within 1 LSB linearity. Driving long cables or low-impedance loads requires an external op-amp buffer such as the OPA2277 to preserve settling time. Also, when using asynchronous CLR (pin 26), debounce the input to avoid spurious mid-scale resets in electrically noisy industrial environments.
Estimated: at maximum power dissipation of 600 mW in still air on a 4-layer JEDEC EIA/JESD51 test board (theta_JA approximately 75 C/W for SOIC-28 wide-body), the junction temperature rise above 25C ambient is approximately 45 C, leaving about 60 C of headroom in the 125 C absolute-maximum rating. For enclosed industrial cabinets at 70C ambient, derate by 0.45 and confirm with a thermocouple measurement on the package top.
Route digital data lines DB0-DB15 away from the analog output (pin 22) and REF pin (pin 23) traces; ideally, place a GND guard trace between the two regions. Use series-termination resistors of 33 ohms on long digital lines to suppress ringing. Place the GAIN (pin 24) and OFFSET (pin 25) calibration trimpots close to the device with short, direct traces to avoid stray pickup that adds gain and offset drift.
규정 준수 정보
The DAC715UBG4 suffix denotes Pb-free terminal finish. RoHS and REACH compliance per TI product page. AEC-Q100 not applicable - this part is not automotive-qualified; consult TI automotive-grade catalog for AEC-Q100 alternatives.
