IC POT DIG QUAD 100K 8B 24TSSOP

AD8403ARU100-REEL

Manufacturer Part NumberAD8403ARU100-REEL
DescriptionIC POT DIG QUAD 100K 8B 24TSSOP
ManufacturerAnalog Devices Inc
AD8403ARU100-REEL datasheet
 


Specifications of AD8403ARU100-REEL

Rohs StatusRoHS non-compliantTaps256
Resistance (ohms)100KNumber Of Circuits4
Temperature Coefficient500 ppm/°C TypicalMemory TypeVolatile
InterfaceSPI, 3-Wire SerialVoltage - Supply2.7 V ~ 5.5 V
Operating Temperature-40°C ~ 125°CMounting TypeSurface Mount
Package / Case24-TSSOPResistance In Ohms100K
Number Of Elements4# Of Taps256
Resistance (max)100KOhmPower Supply RequirementSingle
Interface TypeSerial (3-Wire/SPI)Single Supply Voltage (typ)3/5V
Dual Supply Voltage (typ)Not RequiredVSingle Supply Voltage (min)2.7V
Single Supply Voltage (max)5.5VDual Supply Voltage (min)Not RequiredV
Dual Supply Voltage (max)Not RequiredVOperating Temp Range-40C to 125C
Operating Temperature ClassificationAutomotiveMountingSurface Mount
Pin Count24Package TypeTSSOP
For Use WithAD8403EVAL - BOARD EVAL FOR AD8403  
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1kΩ
DIGITAL
PINS
Figure 51. Equivalent ESD Protection Circuits
20 Ω
A, B, W
Figure 52. Equivalent ESD Protection Circuit (Analog Pins)
RDAC
10kΩ
A
C
C
A
C
W
120pF
W
C
= 90.4pF (DW/256) + 30pF
C
= 90.4pF [1 – (DW/256)] + 30pF
A
B
Figure 53. RDAC Circuit Simulation Model for RDAC = 10 kΩ
The AC characteristics of the RDAC are dominated by the
internal parasitic capacitances and the external capacitive loads.
The −3 dB bandwidth of the AD8403AN10 (10 kΩ resistor)
measures 600 kHz at half scale as a potentiometer divider.
Figure 30 provides the large signal Bode plot characteristics
of the three available resistor versions 10 kΩ, 50 kΩ, and 100 kΩ.
The gain flatness vs. frequency graph of the 1 kΩ version predicts
filter applications performance (see Figure 33). A parasitic
simulation model has been developed and is shown in Figure 53.
Listing I provides a macro model net list for the 10 kΩ RDAC.
Listing I. Macro Model Net List for RDAC
LOGIC
.PARAM DW=255, RDAC=10E3
*
.SUBCKT DPOT (A,W,)
*
CA A 0 {DW/256*90.4E-12+30E-12}
RAW A W {(1-DW/256)*RDAC+50}
CW W 0 120E-12
RBW W B {DW/256*RDAC+50}
CB B 0 {(1-DW/256)*90.4E-12+30E-12}
*
.ENDS DPOT
B
The total harmonic distortion plus noise (THD + N), shown in
Figure 41, is measured at 0.003% in an inverting op amp circuit
B
using an offset ground and a rail-to-rail OP279 amplifier.
Thermal noise is primarily Johnson noise, typically 9 nV/√Hz
for the 10 kΩ version at f = 1 kHz. For the 100 kΩ device,
thermal noise becomes 29 nV/√Hz. Channel-to-channel
crosstalk measures less than −65 dB at f = 100 kHz. To achieve
this isolation, the extra ground pins provided on the package to
segregate the individual RDACs must be connected to circuit
ground. AGND and DGND pins should be at the same voltage
potential. Any unused potentiometers in a package should be
connected to ground. Power supply rejection is typically −35 dB
at 10 kHz. Care is needed to minimize power supply ripple in
high accuracy applications.
Rev. E | Page 23 of 32
AD8400/AD8402/AD8403