Analog Input Stepper Driver : 
JT322AN is analog input stepper motor driver, which can be driven by an external potentiometer or driver. Using the latest 32 DSP technology, providing precision 0.05A current setting unit , and taking advanced digital filtering techniques, anti-resonance technology and precision current control technology to make it implement precise smooth operation, extra low noise . It’s widely used in semiconductor, electronic processing equipment, medical and precision equipment.
Capable of driving Nema11, Nema14, Nema17 and Nema23 series of two-phase hybrid stepper motors.
User Manual of JT322AN
Control Mode: switch control
Max Input Frequency: 200KHz
Input Voltage Range: 12-30VDC
Suggested Power Supply Voltage Range: 12-24 VDC
Output Current: 0.50 - 2.00 A
Software Configuration. Resolution Range: 200 - 102,400 
DIP Switch Resolution Setings: 200，400, 800, 1600, 3200, 6400, 12800, 25600
Software Cofig Current Range: 0.50 - 2.20A 
DIP Switch Current Configurations: 0.5A, 0.7A, 1.0A, 1.3A, 1.6A, 1.9A, 2.2A
Logic Current Range: 7-16mA      (10mA typical)
Logic Voltage Range: 4-5 VDC for pulse active high (default) , or 0-0.5V for pulse active low
Pulse enabled at: Rising edge
Idle Current Percentage: 50 %
Software Config. Idle Current Percentage: 0-100%
Step Width: 2,500 ns
Minimal Direction Setup Time: 5,000 ns
Protection: Over-current, over-voltage, and stall, phase-error
Isolation Resistance: 500M Ohm
Environment: Avoid dust, oil fog and corrosive gases
Ambient Temperature: 0-50°C
Humidity: 40–95% RH
Operating Temperature: 0-70°C
Vibration: 5.9 m/s2 Max
Storage Temperature: -20-65°C
Control signal connection diagram
(If the controller sends the control signal is +12 ~ +24 V, the PUL-, DIR-, ENA- signal line to increase the 1 / 4W 1K ~ 2K resistor current limit)