ADC-24 PICO TECHNOLOGY, ADC-24 Datasheet - Page 15

DATALOGGER, HI-RES

ADC-24

Manufacturer Part Number
ADC-24
Description
DATALOGGER, HI-RES
Manufacturer
PICO TECHNOLOGY
Datasheet

Specifications of ADC-24

Connector Type
D25 Female
Interface
USB 1.1 (USB 2.0 Compatible)
No. Of Channels
16
Power Supply
From USB
Resolution
24 Bits
Interface Type
USB 1.1 (USB 2.0 Compatible)
Rohs Compliant
NA
Lead Free Status / RoHS Status
na
ADC-20/ADC-24 User's Guide
4.3
4.4
Copyright © 2005-2010 Pico Technology Ltd. All rights reserved.
Analog inputs are connected to the ADC-20 and ADC-24 through the female DB25
connector. The connections are as follows:
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
The table below shows the number of noise-free bits of resolution for the full range of
conversion times.
Analog connector
Noise-free resolution and conversion time
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
Conversion
channel
660 ms
340 ms
180 ms
100 ms
60 ms
time
per
Function
Channel 2 (Channel 1-)
Channel 4 (Channel 3-)
Channel 6 (Channel 5-)
Channel 8 (Channel 7-)
Channel 10 (Channel 9-)
Channel 12 (Channel 11-)
Channel 14 (Channel 13-)
Channel 16 (Channel 15-)
Analog Ground
+5 volts
-5 volts
+2.5 volts
Digital I/O 4
Channel numbers in brackets apply when the input is set to differential
mode.
Channels 9 to 16 exist only on the ADC-24.
Digital I/Os 1 to 4 exist only on the ADC-24.
Pins 10 and 11 are low-current outputs for powering small sensors. Do
not exceed the current limits given in the
The analog and digital grounds are not connected together inside the
unit. You should not connect them together externally, as this would
degrade the accuracy of the unit.
For easy connection to the DB25 connector, we recommend that you
use the
39 mV
17
17
16
16
15
ADC-20/ADC-24 terminal
78 mV
18
18
17
17
16
ADC-24 only
& Noise-free resolution (bits)
156 mV
19
19
18
18
17
Voltage range
313 mV
Pin
14
15
16
17
18
19
20
21
22
23
24
25
20
19
19
18
18
board.
Function
Channel 1
Channel 3
Channel 5
Channel 7
Channel 9
Channel 11
Channel 13
Channel 15
Digital Ground
Digital I/O 1
Digital I/O 2
Digital I/O 3
625 mV ±1250 mV 2500 mV
Specifications
20
19
19
18
18
ADC-20 and ADC-24
20
20
19
19
18
table.
20
20
19
19
18
adc20.en
12

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