DAC81416RHA - 16-Ch 16-Bit High-Voltage Output DAC | Texas Instruments
MPN： DAC81416RHA ✓ 啟用中DAC81416RHA 概覽
A high-voltage output DAC is a precision data converter that synthesizes analog voltage signals (rather than low-level current-mode outputs) directly from a digital codeword. Compared to current-output DACs (such as multiplying-R2R or R-2R ladder types), high-voltage-output DACs integrate the output amplifier on-chip, eliminating the need for an external op-amp and signal-conditioning stage in applications such as industrial process control, optical networking bias control, and automated test equipment. Within the broader power management and signal chain hierarchy, a high-voltage DAC sits between a digital controller and an analog actuator: microcontroller -> DAC -> driver amplifier -> load.
Key features of the DAC81416RHA include 16-bit monotonic operation, high linearity of ±4 LSB (max) INL, integrated 2.5 V reference with 5 ppm/°C typical drift, per-channel programmable gain and offset calibration registers, hardware LDAC pin for simultaneous output updates, and a wide AVDD supply range up to 41 V. The integrated reference eliminates the need for an external precision reference in most applications, simplifying BOM count and saving board space.
The DAC81416RHA uses a precision R-2R ladder architecture combined with an output buffer capable of sourcing and sinking 5 mA per channel. Per-channel calibration registers correct for system-level zero and full-scale errors, while the wide analog output voltage range allows direct drive of high-voltage actuators, PIN diode attenuators, and proportional control loops. The device is also pin-compatible with the 14-bit DAC71416RHA and 12-bit DAC61416RHA, providing design scalability.
Typical applications include optical networking (laser bias control, VOA attenuators), industrial process control (valve and pump control), automated test equipment (ATE) pin electronics, programmable power supplies, and bias-current generation for MEMS devices. The 16 independent channels also suit multi-axis motion-control boards that require synchronized analog setpoints.
When designing with this DAC, ensure that the AVDD supply provides adequate headroom for the desired output swing and that adequate bulk decoupling is placed near the AVDD and AVSS pins. The LDAC pin enables simultaneous output updates across all channels, which is critical for scope- and waveform-synchronized actuation.
This page synthesizes distributor pricing for the DAC81416RHA from authorized sources, drop-in pin-compatible alternatives from the same DACx1416 family, and practical PCB layout notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 DAC81416RHA — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
DAC71416RHAR
✅ 直接替換📋 參考替代品（不在目錄中）
DAC61416RHAR
✅ 直接替換📋 參考替代品（不在目錄中）
DAC71416RHA
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
DAC61416RHA
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
DAC81416RHAR
✅ 直接替換📋 參考替代品（不在目錄中）
DAC81416RHA 最大額定值與電氣特性
| Number of Channels | 16 |
| 解析度 | 16 bits |
| Settling Time (typical) | 12 us |
| Analog Output Voltage Range | up to +/-20 V (depending on AVDD/AVSS) |
| Maximum AVDD Supply | 41 V |
| Internal Reference Voltage | 2.5 V |
| Internal Reference Drift | 5 ppm/degree C (typical) |
| Integral Nonlinearity (INL, max) | +/-4 LSB |
| Output Current per Channel | 5 mA (source/sink) |
| Digital Interface | SPI (4-wire, up to 50 MHz) |
| 封裝 | 40-pin VQFN (RHA, 6x6 mm) |
| 安裝類型 | Surface Mount |
| 工作溫度範圍 | -40C to +125C |
| MSL 等級 | 2 (1 year floor life) |
| RoHS 狀態 | Compliant |
| Pin-Compatible Family Members | DAC61416 (12-bit), DAC71416 (14-bit) |
| LDAC Pin | Yes (simultaneous output update) |
DAC81416RHA 腳位配置
| 腳位 1 | AVDD — Analog positive supply |
| 腳位 2 | AVSS — Analog negative supply |
| 腳位 3 | VREF — Reference voltage input/output |
| 腳位 4 | GND — Digital ground |
| 腳位 5 | SDI — SPI data input |
| 腳位 6 | SDO — SPI data output |
| 腳位 7 | SCLK — SPI clock |
| 腳位 8 | SYNC — SPI chip select (active low) |
| 腳位 9 | LDAC — Load DAC (simultaneous update) |
| 腳位 10 | CLR — Clear (async reset) |
| 腳位 11 | A0VOUT — Channel 0 analog output |
| 腳位 12 | A1VOUT — Channel 1 analog output |
| 腳位 13 | A2VOUT — Channel 2 analog output |
| 腳位 14 | A3VOUT — Channel 3 analog output |
| 腳位 15 | A4VOUT — Channel 4 analog output |
| 腳位 16 | A5VOUT — Channel 5 analog output |
| 腳位 17 | A6VOUT — Channel 6 analog output |
| 腳位 18 | A7VOUT — Channel 7 analog output |
| 腳位 19 | A8VOUT — Channel 8 analog output |
| 腳位 20 | A9VOUT — Channel 9 analog output |
| 腳位 21 | A10VOUT — Channel 10 analog output |
| 腳位 22 | A11VOUT — Channel 11 analog output |
| 腳位 23 | A12VOUT — Channel 12 analog output |
| 腳位 24 | A13VOUT — Channel 13 analog output |
| 腳位 25 | A14VOUT — Channel 14 analog output |
| 腳位 26 | A15VOUT — Channel 15 analog output |
| 腳位 27 | NC — Not connected (per datasheet) |
| 腳位 28 | NC — Not connected (per datasheet) |
| 腳位 29 | NC — Not connected (per datasheet) |
| 腳位 30 | NC — Not connected (per datasheet) |
| 腳位 31 | NC — Not connected (per datasheet) |
| 腳位 32 | NC — Not connected (per datasheet) |
| 腳位 33 | NC — Not connected (per datasheet) |
| 腳位 34 | NC — Not connected (per datasheet) |
| 腳位 35 | NC — Not connected (per datasheet) |
| 腳位 36 | NC — Not connected (per datasheet) |
| 腳位 37 | NC — Not connected (per datasheet) |
| 腳位 38 | NC — Not connected (per datasheet) |
| 腳位 39 | NC — Not connected (per datasheet) |
| 腳位 40 | EP — Exposed pad (thermal/AVSS) |
典型應用
DAC81416RHA 適用於 6 應用s: Optical Networking - Laser Bias Control, Industrial Process Control, Automated Test Equipment (ATE) Pin Electronics, Programmable Power Supply Setpoints, Multi-Axis Motion Control, MEMS Bias-Current Generation.
Optical Networking - Laser Bias Control
The DAC81416RHA's 16 independent high-voltage outputs and plus/minus 20 V swing suit laser bias-control networks in optical transceivers. Each channel can drive a PIN diode attenuator or laser driver reference with 16-bit resolution and 12 us settling time, enabling precise optical power setpoints. The integrated 2.5 V reference (5 ppm/degree C drift) provides long-term stability across the -40C to +125C industrial temperature range. Per-channel calibration registers correct for system-level zero and full-scale errors, and the LDAC pin enables simultaneous updates across all 16 channels - critical for coherent optical transceivers requiring phase-synchronized bias control.
推薦
Industrial Process Control
The DAC81416RHA's plus/minus 20 V analog output range allows direct drive of industrial 4-20 mA current loops and valve actuators without external op-amps. Each of the 16 channels delivers up to 5 mA of source/sink current, and the integrated reference eliminates a separate precision reference IC. The SPI interface operates up to 50 MHz, allowing fast loop updates from a host microcontroller or PLC. The wide -40C to +125C operating range covers harsh industrial environments, and the 40-pin VQFN package provides a compact footprint for multi-channel control cards.
推薦
Automated Test Equipment (ATE) Pin Electronics
The DAC81416RHA provides 16 channels of 16-bit precision voltage sources, ideal for ATE pin electronics where multiple DUT (device-under-test) channels must be driven simultaneously. The 12 us settling time and 16-bit monotonic operation support high-throughput production test, and the LDAC pin enables deterministic simultaneous output updates across all 16 channels. The wide AVDD supply range (up to 41 V) accommodates mixed-voltage DUTs. The integrated reference simplifies calibration, and the VQFN-40 footprint keeps board area minimal in high-channel-count test heads.
推薦
Programmable Power Supply Setpoints
The DAC81416RHA can generate precision analog setpoints for multi-rail programmable power supplies. Each channel drives the reference input of a downstream DC-DC converter or LDO, enabling 16 independently programmable voltage rails with 16-bit resolution. The 12 us settling time allows fast transient response testing, and the per-channel calibration registers compensate for output amplifier offset. The plus/minus 20 V swing covers bipolar supply setpoints, and the SPI interface supports fast digital updates from a host controller.
推薦
Multi-Axis Motion Control
The DAC81416RHA's 16 independent analog outputs suit multi-axis motion controllers, where each axis requires a precision analog command signal to its servo driver. The LDAC pin enables simultaneous updates across all axes, ensuring synchronized motion profiles. The 16-bit resolution provides smooth velocity and position profiles, while the 12 us settling time supports high-bandwidth servo response. The integrated reference and wide operating temperature range cover industrial motion-control environments.
推薦
MEMS Bias-Current Generation
The DAC81416RHA provides 16 precision current/voltage outputs suitable for biasing MEMS sensors, micro-mirrors, or piezoelectric actuators. The 16-bit resolution enables fine-grained control over MEMS deflection or resonance, while the per-channel calibration registers compensate for device-to-device variation. The plus/minus 20 V output swing covers high-voltage MEMS drive requirements, and the integrated reference simplifies the BOM. The VQFN-40 package footprint is compact enough for space-constrained MEMS modules.
推薦
推薦產品摘要
工程參考資料，適用於 DAC81416RHA — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | DAC71416RHAR | DAC61416RHAR | DAC81416RHAR |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VQFN-40 (RHA, 6x6 mm) | VQFN-40 (RHA, 6x6 mm) - same | VQFN-40 (RHA, 6x6 mm) - same | VQFN-40 (RHA, 6x6 mm) - same |
| Resolution | 16 bits | 14 bits | 12 bits | 16 bits |
| Number of Channels | 16 | 16 | 16 | 16 |
| Settling Time | 12 us | 12 us | 12 us | 12 us |
| Internal Reference | 2.5 V, 5 ppm/degree C | 2.5 V, 5 ppm/degree C | 2.5 V, 5 ppm/degree C | 2.5 V, 5 ppm/degree C |
| Output Voltage Range | plus/minus 20 V (max) | plus/minus 20 V (max) | plus/minus 20 V (max) | plus/minus 20 V (max) |
| Digital Interface | SPI, 50 MHz | SPI, 50 MHz | SPI, 50 MHz | SPI, 50 MHz |
| Price (qty 1, USD) | 27.50 | 19.80 | 14.20 | 27.50 |
主要差異化特點
- Highest resolution in DACx1416 family (對比DAC71416RHAR)
- Wide high-voltage analog output range (對比DAC61416RHAR)
- Integrated 2.5 V reference with low drift (對比DAC71416RHA)
設計說明
The DAC81416RHA requires AVDD and AVSS supply rails with adequate headroom for the desired analog output range. Per the datasheet, AVDD can go up to 41 V absolute max; for a plus/minus 20 V bipolar output, use AVDD=+20 V and AVSS=-20 V. Place 10 uF bulk and 0.1 uF ceramic decoupling capacitors close to each AVDD/AVSS pin pair to suppress switching noise and ensure low output impedance at high frequencies.
Keep the analog output traces (A0VOUT through A15VOUT) away from the SPI digital traces to minimize digital-to-analog crosstalk. Use a ground plane on an inner PCB layer to provide low-impedance return paths, and connect the VQFN-40 exposed pad (pin 40) to AVSS to dissipate heat and provide a stable thermal/electrical reference. Route the SPI signals (SDI, SDO, SCLK, SYNC) as a matched-length group and place a small series resistor near the source if signal integrity is a concern.
The DAC81416RHA's 12 us specification assumes a 1 nF load on each analog output. Heavier loads (longer cables, large filter capacitors) will degrade settling time. Add a unity-gain output buffer (e.g., AD8534ARZ) if your load exceeds 1 nF, or reduce the load capacitor to maintain the datasheet settling spec. The output amplifier can source/sink 5 mA per channel; loads drawing more current will cause voltage drop.
合規資訊
RoHS and REACH compliant per TI product page. Not AEC-Q100 qualified - the DAC81416RHA is intended for industrial and commercial applications. Operating temperature -40C to +125C covers extended industrial range.
