isl22444 Intersil Corporation, isl22444 Datasheet
isl22444
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isl22444 Summary of contents
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... DCP’s IVRi to the corresponding WRi. The ISL22444 also has 11 General Purpose non-volatile registers that can be used as storage of lookup table for multiple wiper position or any other valuable information. The ISL22444 features a dual supply that is beneficial for applications requiring a bipolar range for DCP terminals between V- and V . ...
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... VCC 15 SDI RH1 12 RL1 11 RW1 RH3 RW3 WR3 RL3 RH2 WR2 RW2 RL2 RH1 WR1 RW1 RL1 RH0 RW0 WR0 RL0 ISL22444 (20 LEAD QFN) TOP VIEW RW3 VCC SDI 3 13 SCK SDO 5 11 RH1 ...
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... RW0 EPAD* * Note: PCB thermal land for QFN EPAD should be connected to V- plane or left floating. For more information refer to http://www.intersil.com/data/tb/TB389.pdf 3 ISL22444 “High” terminal of DCP3 “Low” terminal of DCP3 “Wiper” terminal of DCP3 No connection SPI interface clock input Data Output of the SPI serial interface Device ground pin “ ...
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... V DCP to DCP matching MATCH (Note 10) TC Ratiometric temperature coefficient V (Note 11, 20) 4 ISL22444 Thermal Information Thermal Resistance (Typical, Note 3) 20 Lead TSSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 +0 Lead QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Maximum Junction Temperature (Plastic Package +150°C Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp ...
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... V- Supply Current (non-volatile V-2 write/read) V- Supply Current (non-volatile write/read Current (standby ISL22444 TEST CONDITIONS Wiper at midpoint (80hex) W option (10k) Wiper at midpoint (80hex) U option (50k) Wiper at midpoint (80hex) T option (100k) W option U, T option W option U, T option W option U, T option Wipers at the same tap position with the ...
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... Hysteresis SCK, SDI, and CS input buffer hysteresis V SDO output buffer LOW voltage OL R SDO pull-up resistor off-chip pu (Note 19) 6 ISL22444 TEST CONDITIONS V- = -5.5V +5.5V @ +85°C, SPI interface CC in standby state V- = -5.5V +5.5V @ +125°C, SPI interface CC in standby state V- = -2.25V +2.25V @ +85°C, SPI ...
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... Write sequence of SPI serial interface, to the end of the self-timed internal non-volatile write cycle specified for the highest data rate transfer for the device. Higher value pull-up can be used at lower data rates. pu 20. This parameter is not 100% tested. 7 ISL22444 TEST CONDITIONS R = 2k, Cbus = 30pF 2k, Cbus = 30pF ...
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... LEAD SCK t SU MSB SDI HIGH IMPEDANCE SDO Output Timing CS SCK t SO MSB SDO ADDR SDI XDCP Timing (for All Load Instructions) CS SCK MSB SDI V W HIGH IMPEDANCE SDO 8 ISL22444 10pF t CYC ... ... ... ... LAG ...
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... TAP POSITION (DECIMAL) FIGURE 3. DNL vs TAP POSITION IN VOLTAGE DIVIDER MODE FOR 10kΩ (W) 2.0 1.6 1.2 0.8 50k V = 2.25V CC 0 TEMPERATURE (ºC) FIGURE 5. ZS ERROR vs TEMPERATURE 9 ISL22444 2 +125ºC 1.5 1 +25ºC 0.5 -0 -40ºC -1.0 -1.5 -2.0 200 250 FIGURE 2. STANDBY I 0. +25ºC 0.25 -0.25 -0.50 200 250 FIGURE 4. INL vs TAP POSITION IN VOLTAGE DIVIDER ...
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... FIGURE 9. END TO END R % CHANGE vs TOTAL TEMPERATURE 500 10k 400 300 200 100 116 TAP POSITION (DECIMAL) FIGURE 11. TC FOR RHEOSTAT MODE IN ppm 10 ISL22444 (Continued) 2 +25ºC 1.5 1.0 0.5 -0.5 200 250 FIGURE 8. INL vs TAP POSITION IN RHEOSTAT MODE FOR 200 10k 160 120 80 40 ...
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... CS LOW enables the ISL22444, placing it in the active power mode. A HIGH to LOW transition required prior to the start of any operation after power up. When CS is HIGH, the ISL22444 is deselected and the SDO pin is at high impedance, and (unless an internal write cycle is underway) the device will be in the standby state. ...
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... RWi and RLi increases monotonically, while the resistance between RHi and RWi decreases monotonically. While the ISL22444 is being powered up, the WRi is reset to 80h (128 decimal), which locates RWi roughly at the center between RLi and RHi. After the power supply voltage ...
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... SDO 13 ISL22444 Write Operation A Write operation to the ISL22444 is a two or more bytes operation. First, It requires, the CS transition from HIGH to LOW. Then host must send a valid Instruction Byte followed by one or more Data Bytes to SDI pin. The host terminates the write operation by pulling the CS pin from LOW to HIGH. ...
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... WRi as the IVRi. Reading from the IVRi will not change the WRi, if its contents are different. Daisy Chain Configuration When application needs more then one ISL22444, it can communicate with all of them without additional CS lines by daisy chaining the DCPs as shown on Figure 18. In Daisy ...
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... FIGURE 18. DAISY CHAIN CONFIGURATION CS SCK 16 CLKLS SDI SDO 0 SDO 1 SDO 2 FIGURE 19. DAISY CHAIN WRITE SEQUENCE DCP SCK SDI INSTRUCTION SDO 15 ISL22444 N DCP IN A CHAIN DCP1 DCP2 CS CS SCK SCK SDI SDO SDI 16 CLKS ...
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... SDI RD DCP2 RD DCP1 SDO FIGURE 21. DAISY CHAIN READ SEQUENCE DCP Application Example Figure 22 shows an example of using ISL22444 for gain setting and offset correction in a high side current measurement application. DCP0 applies a programmable offset voltage of 25mV to the FB+ pin of the Instrumentation ± ...
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... ISL28272 OUT 3 FB FB- V- 150k RH1 RW1 R 5 309, 1% 50k RL1 DCP1 (1/4 ISL22444U) PROGRAMMABLE GAIN 90 TO 110 R 6 1.37k, 1% ISL22444UFV20Z 16 18 Vcc RH0 19 DCP0 RL0 5 20 SCK RW0 6 SDO 13 RH1 15 12 SDI DCP1 RL1 14 11 ...
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... Quad Flat No-Lead Plastic Package (QFN) Micro Lead Frame Plastic Package (MLFP) 18 ISL22444 L20.5x5 20 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE MILLIMETERS SYMBOL MIN 0. θ - NOTES: 1. Dimensioning and tolerancing conform to ASME Y14.5-1994. ...
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... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 19 ISL22444 M20.173 M B ...