AD5235BRU25-RL7 Analog Devices Inc, AD5235BRU25-RL7 Datasheet - Page 27

• Manufacturer Part Number: AD5235BRU25-RL7
• Description: IC DGTL POT DUAL 1024POS 16TSSOP
• Manufacturer: Analog Devices Inc

Specifications of AD5235BRU25-RL7

• Rohs Status: RoHS non-compliant
• Taps: 1024
• Resistance (ohms): 25K
• Number Of Circuits: 2
• Temperature Coefficient: 35 ppm/°C Typical
• Memory Type: Non-Volatile
• Interface: 4-Wire SPI Serial
• Voltage - Supply: 3 V ~ 5.5 V, ±2.25 V ~ 2.75 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP (0.173", 4.40mm Width)
• Number Of Elements: 2
• # Of Taps: 1024
• Resistance (max): 25KOhm
• Power Supply Requirement: Single/Dual
• Interface Type: Serial (4-Wire/SPI)
• Single Supply Voltage (typ): 3.3/5V
• Dual Supply Voltage (typ): ±2.5V
• Single Supply Voltage (min): 3V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): ±2.25V
• Dual Supply Voltage (max): ±2.75V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 16
• Lead Free Status / RoHS Status: Not Compliant
• Other names: AD5235BRU25-RL7; AD5235BRU25-RL7TR

RDAC CIRCUIT SIMULATION MODEL
The internal parasitic capacitances and the external capacitive
loads dominate the ac characteristics of the RDACs. Configured
as a potentiometer divider, the −3 dB bandwidth of the AD5235
(25 kΩ resistor) measures 125 kHz at half scale. Figure 15 provides
the large signal bode plot characteristics of the two available
resistor versions, 25 kΩ and 250 kΩ. A parasitic simulation model
is shown in Figure 62.
Figure 62. RDAC Circuit Simulation Model (RDAC = 25 kΩ)
A
11pF
C
A
RDAC
25kΩ
W
80pF
C
11pF
B
B
Rev. C | Page 27 of 28
The following code provides a macro model net list for the
25 kΩ RDAC:
.PARAM D = 1024, RDAC = 25E3
*
.SUBCKT DPOT (A, W, B)
*
CA
RWA
CW
RWB
CB
*
.ENDS DPOT
A
A
W
W
B
0
W
0
B
0
11E-12
{(1-D/1024)* RDAC + 50}
80E-12
{D/1024 * RDAC + 50}
11E-12
AD5235