Measurement Computing PCI-2515, User Manual

PCI-2515 User's Guide 

Specifications 

28  

Analog outputs 

Analog output channels can be updated synchronously relative to scanned inputs, and clocked from either an 
internal onboard clock, or an external clock source. Analog outputs can also be updated asynchronously, 
independent of any other scanning system.  

 Table 3. Analog output specifications 

Channels 2 
Resolution 16-bits 
Data buffer 

PC-based memory 

Output voltage range 

±10 V 

Output current 

±10 mA 

Offset error 

±0.0045 V maximum 

Digital feed-through 

<10 mV when updated 

DAC analog glitch 

<12 mV typical at major carry 

Gain error 

±0.01% 

Coupling DC 
Update rate 

1 MHz maximum, resolution 20.83 ns 

Settling time  

2 µs to rated accuracy 

Pacer sources 

Four programmable sources: 

ƒ

Onboard D/A clock, independent of scanning input clock 

ƒ

Onboard scanning input clock 

ƒ

External D/A input clock, independent of external scanning input clock-(XDPCR) 

ƒ

External scanning input clock-(XAPCR) 

Trigger sources 

Start of input scan 

Digital input/output 

Table 4. Digital input/output specifications 

Number of I/O 

24 

Ports 

Three banks of 8.  
Each port is programmable as input or output 

Input scanning mode 

Asynchronous, under program control at any time relative to input scanning 

Configuration 10 

k

Ω

 pull-up to +5 V, 20 pf to analog common 

Input protection 

±15 kV ESD clamp diodes 

Input high 

+2.0 V to +5.0 V 

Input low 

0 to 0.8 V 

Output high  

>2.0 V 

Output low  

<0.8 V 

Output current 

Output 12 mA per pin, 200 mA total continuous 

Digital input pacing 

Onboard clock, external clock (XAPCR) 

Digital output pacing 

Four programmable sources: 

ƒ

Onboard D/A clock, independent of scanning input clock 

ƒ

Onboard scanning input clock 

ƒ

External D/A input clock, independent of external scanning input clock-(XDPCR) 

ƒ

External scanning input clock-(XAPCR) 

Digital input trigger sources 
and modes 

See 

Table 7

Digital output trigger sources  Start of input scan 
Data transfer 

DMA 

Sampling/update rate 

12 MHz maximum 

Pattern generation output 

Two of the 8-bit ports can be configured for 16-bit pattern generation. The pattern can also 
be updated synchronously with an acquisition at up to 12 MHz.