Model: PCI‑6723

Part Number: 778701‑01

Brand: National Instruments (NI)

Type: 13-bit, 32-channel high-density analog voltage output card (static + waveform)

Bus: Standard PCI (5 V, half-length card)

Connector: 2 × 68-pin SCSI (female)

Driver: NI‑DAQmx

Status: Out of Production (EOL), recommended replacement: PCIe‑6738 (16-bit, 32 channels, 1 MS/s)

Core Overview

PCI‑6723 is a high-density, multi-channel analog output card, featuring 32 channels of 13-bit, up to 800 kS/s voltage output, supporting static DC output + hardware-timed waveform generation. It is suitable for multi-channel process control, signal simulation, ATE testing, actuator driving, closed-loop control, etc., which require a high number of channels, medium speed, and synchronous updates. The board includes 8 channels of DIO + 2 channels of 24-bit counters, supporting external clock/trigger, RTSI synchronization, and can replace multiple independent DACs, low-speed arbitrary waveform generators, and PID controllers.

1. Analog Output (AO)

Channels: 32 single-ended voltage outputs (AO0–AO31)

Resolution: 13 bits (8192 levels)

Output range: ±10 V (fixed)

Update rate (hardware timing):

Single channel: Up to 800 kS/s

32-channel synchronization: 45 kS/s/channel (total 204 kS/s)

Synchronous update: All channels refreshed simultaneously (hardware clock)

Output impedance: 0.1 Ω (low-res driving)

Accuracy (25 °C):

Offset error: ±4 mV

Gain error: ±0.1% of full scale

Temperature coefficient: 10 ppm/°C (gain)

Stability time: ≤ 8 μs (to ±0.01%)

Load: ≥ 1 kΩ, maximum ±10 mA

Drive mode: Hardware timing (waveform) / Software timing (static)

2. Digital I/O (DIO)

Channels: 8 bidirectional, 5 V TTL/CMOS

Input: Low ≤ 0.8 V; High ≥ 2.0 V

Output: Low ≤ 0.55 V @ 16 mA; High ≥ 2.4 V @ 16 mA

Power-on: Input high impedance

3. Counter / Timer

Quantity: 2 24-bit, 20 MHz NI

Function: Event counting, pulse generation, frequency / period measurement, trigger synchronization

Time base: 20 MHz / 100 kHz, accuracy ±0.01%

4. Clock and Trigger

Internal clock: 100 MHz base

External clock: Supported (TTL level)

Trigger: Digital edge trigger (rising/falling), supports external trigger synchronization

Synchronous bus: RTSI (synchronize with other NI cards)

5. Power and Environment

Power supply: +5 V @ 1.8 A; ±12 V @ 100 mA

Operating temperature: 0 - 55 °C

Size: Half-length PCI card (approximately 17 cm × 10 cm)

6. Typical Applications

Multi-channel process control (temperature, pressure, flow loops)

Sensor signal simulation (thermocouple, pressure, flow signals)

ATE automated testing (multi-channel DAC simulation, load simulation)

Actuator / valve drive (±10 V control signal)

Low-speed waveform generation (sine / square / triangular wave, custom waveform)

Key Features (in one sentence)

32 channels of 13-bit, up to 800 kS/s synchronous output, high density, medium speed, suitable for multi-channel control and simulation

Dual 68-pin connectors, clear wiring, channel grouping management

8 channels of DIO + 2 channels of counter, high integration, simplifies system

±10 V fixed range, low output impedance, strong driving capability

Out of production, new design recommended PCIe-6738 (16-bit, 32 channels, 1 MS/s)