CN0229 Datasheet, PDF (4/6 Pages) Analog Devices – Industrial Current

CN-0229
Circuit Note
Table 1. Test Results for All Output Ranges
Range
Current Sense Resistor
0 V to +5 V
Don't care
0 V to +10 V
Don't care
−5 V to +5 V
Don't care
−10 V to +10 V
Don't care
0 V to +6 V
Don't care
0 V to +12 V
Don't care
−6 V to +6 V
Don't care
−12 V to +12 V
Don't care
−2.5 V to +2.5 V
Don't care
+4 mA to +20 mA
Internal
0 mA to +20 mA
Internal
0 mA to +24 mA
Internal
−20 mA to +20 mA
Internal
−24 mA to +24 mA
Internal
+4 mA to +20mA
External
0 mA to +20mA
External
0 mA to +24mA
External
−20 mA to +20 mA
External
−24 mA to +24 mA
External
+3.92 mA to +20.4 mA
Internal
0 mA to +20.4 mA
Internal
0 mA to +24.5 mA
Internal
INL (LSB)
1.3
1.1
1.4
1.2
1.9
1.4
1.3
1.7
1.3
5.3
4.2
2.9
5.4
3.9
2.0
1.7
1.6
3.7
4.4
1.7
2.9
2.5
Linearity (%FSR)
0.002
0.002
0.002
0.002
0.003
0.002
0.002
0.003
0.002
0.008
0.006
0.004
0.008
0.006
0.003
0.003
0.002
0.006
0.007
0.014
0.006
0.005
Output Error (%FSR)
0.01
0.02
0.02
0.02
0.02
0.05
0.03
0.05
0.03
0.07
0.06
0.05
0.02
0.02
0.04
0.04
0.04
0.03
0.03
0.11
1.86
0.30
The test results shown in Table 1 were made at 25°C for the first
channel of the EVAL-CN0229-SDPZ board powered by an
Agilent E3631A dc supply and measured with the Agilent 34401A
digital multimeter.
Note that the output ranges 3.92 mA to 20.4 mA, 0 mA to 20.4 mA,
and 0 mA to 24.5 mA are all designed to be trimmed by the
customer to precisely match the 4 mA to 20 mA, 0 mA to 20 mA,
and 0 mA to 24 mA ranges. The 1.86% FSR output error
measurement in the 0 mA to 20.4 mA range includes the gain
error, which is easily removed by customer calibration.
There is a lower dead band about 10 mV referenced to GND. All
the linearity test results were calculated using a reduced code
range of 256 to 65,535. For 3.92 mA to 20.4 mA, 0 mA to 20.4 mA,
and 0 mA to 24.5 mA, the lower dead band is larger than other
standard ranges, and the measured code range is from 1000 to
65,535.
COMMON VARIATIONS
The AD5685R (14 bits) and the AD5684R (12 bits) are pin-
compatible with the AD5686R for applications not requiring
16-bit resolution.
For applications that require channel-to-channel isolation, single
DACs, such as the AD5660 (16 bits), the AD5640 (14 bits), and
the AD5620 (12 bits), are good choices.
For single-channel applications, see the CN-0202, CN-0203, and
CN-0204 circuit notes for more details.
For multichannel applications, the AD5623R (12-bits), AD5643R
(14-bits), and AD5663R (16-bits) are dual nanoDACs, and the
AD5624R (12-bits), AD5644R (14-bits), and AD5664R (16-bits)
are quad nanoDACs. The AD5628/ AD5648/AD5668 are octal
12-/14-/16-bit SPI voltage output denseDACs with 5 ppm/°C
on-chip references.
The AD5750 and AD5750-1 drivers are pin-compatible with the
AD5750-2. The AD5750 can accept 0 V to 4.096 V input with a
4.096 V reference. The AD5750-1 can accept a 0 V to 2.5 V input
with a 1.25 V reference. The AD5751 is a unipolar analog output
driver and can supply a 40 V output using a 50 V AVDD supply.
CIRCUIT EVALUATION AND TEST
Equipment Needed (Equivalents Can Be Substituted)
• System Demonstration Platform (EVAL-SDP-CB1Z)
• CN-0229 Circuit Evaluation Board (EVAL-CN0229-SDPZ)
• CN-0229 Evaluation Software
• Agilent 34401A 6.5 Digital Multimeter
• Agilent E3631A 0 V to ~6 V/5 A ±25 V/1 A Triple Output
DC Power Supply
• PC (Windows® 2000 or Windows XP) with USB interface
• National Instruments GPIB to USB-B interface and cable
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