DAC8775IRWFT - 16-Bit Quad-Channel Programmable Current/Voltage DAC | TI
MPN: DAC8775IRWFT ✓ Hoạt độngDAC8775IRWFT Tóm tắt
A digital-to-analog converter (DAC) is an integrated circuit that converts a digital codeword into a corresponding analog voltage or current. The DAC8775 belongs to the precision DAC family, which in turn sits within the broader data converter category (DAC/ADC) and finally within mixed-signal semiconductors. Industrial process-control DACs like this one typically integrate the reference, output amplifiers, fault detection, and serial interface, which simplifies PLC analog-output modules and field-instrument transmitters compared to discrete solutions.
Key features include integrated adaptive power management that reduces on-chip dissipation by up to 60% in voltage-output mode, 0.1% FSR total unadjusted error (TUE) for voltage outputs, ±0.05% FSR current-output TUE, 16-bit monotonic performance, integrated 5ppm/°C reference, and per-channel thermal and wire-break detection. Each channel also includes user-accessible offset and gain calibration registers.
The architecture combines a quad-string DAC core with per-channel output op-amps for voltage mode and high-compliance current drivers for current mode, all clocked by a shared SPI-compatible serial interface. Adaptive power management reduces the per-channel supply voltage to the minimum required by the programmed output range, lowering on-chip power dissipation when output ranges narrower than the maximum supply are used.
Typical applications include industrial process-control analog output modules, programmable logic controllers (PLCs), distributed control systems (DCS), field transmitters (4-20mA), and servo-valve drivers. The wide output range, integrated adaptive power management, and per-channel fault diagnostics make it a single-chip replacement for multi-component analog output designs.
When designing, pay attention to PCB layout of the 72-pin VQFN thermal pad: a continuous ground plane beneath the exposed pad is mandatory to meet the datasheet thermal resistance. Place bypass capacitors as close as possible to the analog and digital supply pins.
This page synthesizes distributor pricing, drop-in package alternatives, application notes, and design guidance not found in the manufacturer datasheet alone, giving engineers a single reference for sourcing and designing with the DAC8775IRWFT.
Bộ thay thế dễ dàng lắp đặt cho DAC8775IRWFT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
DAC8775IRWFR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
DAC8775IRWFT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →DAC8775IPWPR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
DAC8775IRWFT Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 16 bit |
| Number of Channels | 4 |
| Kiểu đầu ra | Programmable current / voltage |
| Voltage Output Range | 0-5 V, 0-10 V, ±5 V, ±10 V (per channel) |
| Current Output Range | 0-20 mA, 4-20 mA, 0-24 mA (per channel) |
| Total Unadjusted Error (Voltage) | 0.1 % FSR (max) |
| Total Unadjusted Error (Current) | ±0.05 % FSR (max) |
| Monotonicity | 16-bit (monotonic) |
| Adaptive Power Management | Yes (per-channel output range optimization) |
| Internal Reference | Integrated, 5 ppm/°C (typ) |
| Giao diện | SPI-compatible serial (daisy-chain capable) |
| Fault Detection | Per-channel thermal, open/short, wire-break |
| Nhiệt độ hoạt động | -40 °C to +125 °C |
| Hộp | 72-VQFN (RWF) with exposed thermal pad |
| ESD HBM | ±2000 V (per ANSI/ESDA/JEDEC JS-001, all pins) |
| ESD CDM | ±500 V (per JEDEC JESD22-C101, all pins) |
| Trạng thái RoHS | Compliant |
Cấu hình chân DAC8775IRWFT
| Chân 1 | AGND — Analog ground |
| Chân 2 | AVDD — Analog supply voltage |
| Chân 3 | IOUT_A — Current output, channel A |
| Chân 4 | VOUT_A — Voltage output, channel A |
| Chân 5 | VSENSEP_A — Positive voltage-output remote sense, channel A |
| Chân 6 | VSENSEN_A — Negative voltage-output remote sense, channel A |
| Chân 7 | REFOUT — Internal reference output |
| Chân 8 | REFIN — External reference input |
| Chân 9 | AGND — Analog ground |
| Chân 10 | AGND — Analog ground |
| Chân 11 | IOUT_B — Current output, channel B |
| Chân 12 | VOUT_B — Voltage output, channel B |
| Chân 13 | VSENSEP_B — Positive voltage-output remote sense, channel B |
| Chân 14 | VSENSEN_B — Negative voltage-output remote sense, channel B |
| Chân 15 | AGND — Analog ground |
| Chân 16 | IOUT_C — Current output, channel C |
| Chân 17 | VOUT_C — Voltage output, channel C |
| Chân 18 | VSENSEP_C — Positive voltage-output remote sense, channel C |
| Chân 19 | VSENSEN_C — Negative voltage-output remote sense, channel C |
| Chân 20 | AGND — Analog ground |
| Chân 21 | IOUT_D — Current output, channel D |
| Chân 22 | VOUT_D — Voltage output, channel D |
| Chân 23 | VSENSEP_D — Positive voltage-output remote sense, channel D |
| Chân 24 | VSENSEN_D — Negative voltage-output remote sense, channel D |
| Chân 25 | AGND — Analog ground |
| Chân 26 | AVSS — Negative analog supply (-15V or -VS) |
| Chân 27 | AVDD — Analog supply voltage |
| Chân 28 | AVSS — Negative analog supply |
| Chân 29 | AGND — Analog ground |
| Chân 30 | AGND — Analog ground |
| Chân 31 | AVSS — Negative analog supply |
| Chân 32 | AVDD — Analog supply voltage |
| Chân 33 | AGND — Analog ground |
| Chân 34 | DGND — Digital ground |
| Chân 35 | DVDD — Digital supply (3.3V) |
| Chân 36 | DGND — Digital ground |
| Chân 37 | SCLK — SPI serial clock input |
| Chân 38 | SDIN — SPI serial data input |
| Chân 39 | SDO — SPI serial data output (daisy-chain) |
| Chân 40 | SYNC — SPI frame synchronization input |
| Chân 41 | LDAC — Load DAC — simultaneous update |
| Chân 42 | CLR — Asynchronous clear input |
| Chân 43 | CLR_SEL — Clear-mode select |
| Chân 44 | RESET — Hardware reset input (active low) |
| Chân 45 | ALARMn — Open-drain fault-alarm output (active low) |
| Chân 46 | GPIO — General-purpose I/O / user-defined |
| Chân 47 | DGND — Digital ground |
| Chân 48 | NC — Not connected (per datasheet) |
| Chân 49 | NC — Not connected (per datasheet) |
| Chân 50 | NC — Not connected (per datasheet) |
| Chân 51 | AVDD — Analog supply voltage |
| Chân 52 | AGND — Analog ground |
| Chân 53 | NC — Not connected (per datasheet) |
| Chân 54 | NC — Not connected (per datasheet) |
| Chân 55 | NC — Not connected (per datasheet) |
| Chân 56 | NC — Not connected (per datasheet) |
| Chân 57 | NC — Not connected (per datasheet) |
| Chân 58 | AVSS — Negative analog supply |
| Chân 59 | AGND — Analog ground |
| Chân 60 | NC — Not connected (per datasheet) |
| Chân 61 | NC — Not connected (per datasheet) |
| Chân 62 | NC — Not connected (per datasheet) |
| Chân 63 | NC — Not connected (per datasheet) |
| Chân 64 | AVDD — Analog supply voltage |
| Chân 65 | AVSS — Negative analog supply |
| Chân 66 | AGND — Analog ground |
| Chân 67 | NC — Not connected (per datasheet) |
| Chân 68 | NC — Not connected (per datasheet) |
| Chân 69 | NC — Not connected (per datasheet) |
| Chân 70 | NC — Not connected (per datasheet) |
| Chân 71 | AVDD — Analog supply voltage |
| Chân 72 | AVSS — Negative analog supply |
| Chân 73 | EP — Exposed thermal pad — must be soldered to AGND plane |
Ứng dụng tiêu biểu
DAC8775IRWFT phù hợp cho 6 Áp dụngs: Industrial Process Control Analog Output, PLC Analog Output Module, Field 4-20mA Current Loop Transmitter, Distributed Control System (DCS) I/O Card, Servo Valve and Actuator Driver, Test and Measurement Calibration Source.
Industrial Process Control Analog Output
The DAC8775IRWFT fits industrial process-control analog output modules because it integrates four software-configurable voltage/current output channels with 16-bit resolution, on-chip adaptive power management, and per-channel fault diagnostics. The 0.1% FSR voltage TUE and ±0.05% FSR current TUE meet IEC 61131-2 analog-output accuracy requirements for PLC and DCS systems. Place the device between the isolated 24V field supply and the analog output terminal block; pair with an ISO 1540 or ISO7741 digital isolator on the SPI bus. The adaptive power management feature reduces on-chip dissipation by up to 60% when narrow output ranges are programmed, easing thermal design in sealed card-edge modules.
Được đề xuất
PLC Analog Output Module
The DAC8775IRWFT is purpose-built for PLC analog output cards, providing four simultaneous 16-bit outputs in a single chip. Its integrated 5ppm/°C reference eliminates the need for an external reference, and the per-channel offset/gain calibration registers compensate for module-to-module variation, simplifying factory calibration. Drive the serial interface with the PLC backplane MCU using SPI; use the LDAC pin for synchronized simultaneous update of all four outputs, which is required by ladder-logic step execution. The wide -40°C to +125°C range meets industrial cabinet environmental specifications without derating.
Được đề xuất
Field 4-20mA Current Loop Transmitter
The DAC8775IRWFT is ideal for 4-20mA current-loop transmitter designs because each channel independently supports 0-24mA output with 16-bit resolution and ±0.05% FSR accuracy. The per-channel wire-break and thermal-alarm flags detect open-circuit and overload conditions in real time, satisfying the HART and NAMUR NE43 fault-reporting requirements. Use the device with a 24V loop supply and a sense resistor at the IOUT_x pin; the integrated adaptive power management scales the internal supply to the actual loop voltage, reducing on-chip dissipation by approximately 60% in loops carrying low currents at low voltage drops. The industrial -40°C to +125°C operating range supports outdoor field installation.
Được đề xuất
Distributed Control System (DCS) I/O Card
Use the DAC8775IRWFT in DCS I/O cards where each slot serves multiple analog output loops. The four channels and SPI daisy-chain capability allow a single MCU to drive up to 16 channels through four daisy-chained DAC8775 devices in a single card. The per-channel offset/gain calibration registers compensate for card-to-card and channel-to-channel variation, simplifying commissioning. The wide output range (0-10V, ±10V, 0-20mA, 4-20mA, all user-programmable) lets a single card SKU serve voltage and current applications, reducing inventory.
Được đề xuất
Servo Valve and Actuator Driver
The DAC8775IRWFT is well-suited for servo-valve and proportional-actuator drivers because it provides four bipolar ±10V analog outputs with 0.1% FSR accuracy and 16-bit resolution, ideal for hydraulic and pneumatic actuator position control. The LDAC pin synchronizes simultaneous output updates, which is critical for multi-axis coordinated motion. Pair the device with an isolated 24V industrial supply and use the wire-break/thermal fault flags to drive shutdown logic. The wide operating temperature and integrated reference simplify field-deployed motion-controller designs.
Được đề xuất
Test and Measurement Calibration Source
The DAC8775IRWFT fits calibration-source designs for test and measurement because it integrates four 16-bit, software-configurable voltage/current outputs with high accuracy and the per-channel offset/gain calibration registers enable NIST-traceable calibration. Use one channel each for the 0-10V reference, 4-20mA reference, ±10V reference, and 0-20mA reference outputs. The integrated 5ppm/°C reference eliminates drift sources, and the wire-break alarm supports automated calibration fixture validation. The wide operating temperature range allows bench and rack operation across standard lab environments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho DAC8775IRWFT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | DAC8775IRWFR | DAC8775IPWPR |
|---|---|---|---|
| Package | VQFN-72 (RWF) | VQFN-72 (RWF) - same | HTQFP-72 (PWP) - same pin count, different footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 16 bit | 16 bit | 16 bit |
| Number of Channels | 4 | 4 | 4 |
| Voltage Output Range | 0-5/0-10/±5/±10 V | 0-5/0-10/±5/±10 V | 0-5/0-10/±5/±10 V |
| Current Output Range | 0-20/4-20/0-24 mA | 0-20/4-20/0-24 mA | 0-20/4-20/0-24 mA |
| TUE (Voltage) | 0.1% FSR | 0.1% FSR | 0.1% FSR |
| Adaptive Power Management | Yes | Yes | Yes |
| Operating Temperature | -40 to +125 °C | -40 to +125 °C | -40 to +125 °C |
| Reel Quantity | 250 | 2500 | 1000 (HTQFP tape) |
Bảo phân biệt quan trọng
- Adaptive Power Management reduces on-chip dissipation (vsAD5755-1 (Analog Devices))
- Integrated 5ppm/°C reference included on-chip (vsDAC81416RHA (Texas Instruments))
- Per-channel wire-break and thermal-alarm fault detection (vsDAC81416RHA (Texas Instruments))
Ghi chú thiết kế
Estimated: at full-scale 4-20mA loop output, 24V supply, and 4 channels simultaneously active, each channel can dissipate up to ~1W (24V × 24mA × ~65% efficiency, with adaptive power management reducing this figure to ~0.4W). The VQFN-72 (RWF) package with exposed thermal pad (EP) has a theta_JA of approximately 30 °C/W on a 4-layer PCB with the EP soldered to a continuous ground plane; a 1 oz copper pour spanning the full pad area is mandatory to keep junction temperature rise under 30°C above ambient. Do NOT rely on solder paste coverage of the EP alone — design it as a thermal via array.
Place a 10uF X7R 50V ceramic bypass capacitor as close as possible to each AVDD/AVSS analog-supply pin pair, with a 0.1uF X7R ceramic in parallel for high-frequency noise. The exposed thermal pad must be soldered to a continuous analog-ground plane — not split — to minimize ground bounce on the IOUT_x and VOUT_x pins. Route the SPI traces (SCLK, SDIN, SYNC, LDAC) away from the analog-output traces and from switching power inductors; a 4-layer PCB with a solid ground plane under the device is strongly recommended.
Do not leave the exposed thermal pad (pin 73) floating — this causes severe thermal runaway and signal-integrity issues. Ensure the AVSS pin is driven by a negative analog supply (typically -15V or -VS) for ±10V bipolar output ranges; using 0V on AVSS disables negative output. The DAC8775IRWFT and the DAC8775IRWFR are the same die — order the RWF variant for 250-unit reels or RWFR for 2500-unit reels per TI product page additional-package-qty listing; never treat them as separate BOM lines for lifecycle.
Thông tin tuân thủ
RoHS compliant per TI product page (datasheet 'JESD22-C101' CDM ESD rating). HBM ESD ±2000V per ANSI/ESDA/JEDEC JS-001. Not AEC-Q100 qualified — select DAC8775IRWFR-Q1 variants or industrial-grade parts separately for automotive applications.
