AD7846JP Analog Devices Inc, AD7846JP Datasheet - Page 10

IC DAC 16BIT LC2MOS VOUT 28PLCC

AD7846JP

Manufacturer Part Number
AD7846JP
Description
IC DAC 16BIT LC2MOS VOUT 28PLCC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD7846JP

Data Interface
Parallel
Rohs Status
RoHS non-compliant
Settling Time
7µs
Number Of Bits
16
Number Of Converters
1
Voltage Supply Source
Dual ±
Power Dissipation (max)
100mW
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
28-LCC (J-Lead)
Resolution (bits)
16bit
Sampling Rate
143kSPS
Input Channel Type
Parallel
Supply Voltage Range - Digital
4.75V To 5.25V
Supply Current
5mA
Digital Ic Case Style
LCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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AD7846
TERMINOLOGY
Least Significant Bit
This is the analog weighting of 1 bit of the digital word in a
DAC. For the AD7846, 1 LSB = (V
Relative Accuracy
Relative accuracy or endpoint nonlinearity is a measure of the
maximum deviation from a straight line passing through the
endpoints of the DAC transfer function. It is measured after
adjusting for both endpoints (that is, offset and gain errors are
adjusted out) and is normally expressed in least significant bits
or as a percentage of full-scale range.
Differential Nonlinearity
Differential nonlinearity is the difference between the measured
change and the ideal change between any two adjacent codes. A
specified differential nonlinearity of ±1 LSB over the operating
temperature range ensures monotonicity.
Gain Error
Gain error is a measure of the output error between an ideal
DAC and the actual device output with all 1s loaded after offset
error has been adjusted out. Gain error is adjustable to zero
with an external potentiometer.
REF+
− V
REF−
)/2
16
.
Rev. G | Page 10 of 24
Offset Error
This is the error present at the device output with all 0s loaded
in the DAC. It is due to op amp input offset voltage and bias
current and the DAC leakage current.
Bipolar Zero Error
When the AD7846 is connected for bipolar output and 10…000
is loaded to the DAC, the deviation of the analog output from
the ideal midscale of 0 V is called the bipolar zero error.
Digital-to-Analog Glitch Impulse
This is the amount of charge injected from the digital inputs to
the analog output when the inputs change state. This is normally
specified as the area of the glitch in either pA-sec or nV-sec
depending upon whether the glitch is measured as a current or
a voltage.
Multiplying Feedthrough Error
This is an ac error due to capacitive feedthrough from either of
the V
Digital Feedthrough
When the DAC is not selected (that is, CS is held high), high
frequency logic activity on the digital inputs is capacitively
coupled through the device to show up as noise on the V
This noise is digital feedthrough.
REF
terminals to V
OUT
when the DAC is loaded with all 0s.
OUT
pin.

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