ADN2850BCP250 Analog Devices Inc, ADN2850BCP250 Datasheet - Page 20

• Manufacturer Part Number: ADN2850BCP250
• Description: IC DGTL RHEO DL 1024POS 16LFCSP
• Manufacturer: Analog Devices Inc

Specifications of ADN2850BCP250

• Taps: 1024
• Resistance (ohms): 250K
• 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-LFCSP
• Resistance In Ohms: 250K
• Number Of Elements: 2
• # Of Taps: 1024
• Resistance (max): 250KOhm
• Power Supply Requirement: Single/Dual
• Interface Type: Serial (4-Wire/SPI)
• Single Supply Voltage (typ): 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: Contains lead / RoHS non-compliant
• For Use With: EVAL-ADN2850-25EBZ - BOARD EVALUATION FOR ADN2850-25
• Lead Free Status / RoHS Status: Not Compliant, Contains lead / RoHS non-compliant

ADN2850
Table 17. Using Left-Shift by One to Increment 6 dB Steps
SDI
0xC0XXXX
0xC1XXXX
Table 18. Storing Additional User Data in EEMEM
SDI
0x32AAAA
0x335555
SDO
0xXXXXXX
0x32AAAA
SDO
0xXXXXXX
0xC0XXXX
Action
Stores Data 0xAAAA in the extra
EEMEM location USER1. (Allowable to
address in 13 locations with a
maximum of 16 bits of data.)
Stores Data 0x5555 in the extra
EEMEM location USER2. (Allowable to
address in 13 locations with a
maximum of 16 bits of data.)
Action
Moves Wiper 1 to double the
present data contained in the
RDAC1 register.
Moves Wiper 2 to double the
present data contained in the
RDAC2 register.
Rev. C | Page 20 of 28
Table 19. Reading Back Data from Memory Locations
SDI
0x92XXXX
0x00XXXX
Table 20. Reading Back Wiper Settings
SDI
0xB00200
0xC0XXXX
0xA0XXXX
0xXXXXXX
EVAL-ADN2850SDZ EVALUATION KIT
Analog Devices, Inc., offers a user-friendly EVAL-
ADN2850SDZ evaluation kit that can be controlled by a PC in
conjunction with the DSP platform. The driving program is
self-contained; no programming languages or skills are needed.
SDO
0xXXXXXX
0x92AAAA
SDO
0xXXXXXX
0xB00200
0xC0XXXX
0xA003FF
Action
Writes RDAC1 to midscale.
Doubles RDAC1 from midscale to full
scale.
Prepares reading wiper setting from
RDAC1 register.
Reads back full-scale value from SDO.
Action
Prepares data read from USER1
EEMEM location.
NOP Instruction 0 sends a 24-bit word
out of SDO, where the last 16 bits
contain the contents in USER1 EEMEM
location.