DS1859E-020+ Maxim Integrated Products, DS1859E-020+ Datasheet

IC RES TEMP 20/20K 3MON 16-TSSOP

DS1859E-020+

Manufacturer Part Number
DS1859E-020+
Description
IC RES TEMP 20/20K 3MON 16-TSSOP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS1859E-020+

Taps
256
Resistance (ohms)
20K
Number Of Circuits
2
Temperature Coefficient
50 ppm/°C Typical
Memory Type
Non-Volatile
Interface
I²C, 2-Wire Serial
Voltage - Supply
2.85 V ~ 5.5 V
Operating Temperature
-40°C ~ 95°C
Mounting Type
Surface Mount
Package / Case
16-TSSOP
Resistance In Ohms
20K
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The DS1859 dual, temperature-controlled, nonvolatile
(NV) variable resistors with three monitors consists of
two 50k
resistors; three analog monitor inputs (MON1, MON2,
MON3); and a direct-to-digital temperature sensor. The
device provides an ideal method for setting and tem-
perature-compensating bias voltages and currents in
control applications using minimal circuitry. The vari-
able resistor settings are stored in EEPROM memory
and can be accessed over the 2-wire serial bus.
For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Rev 4; 2/06
DISABLE WRITE
INTERFACE
Tx-FAULT
GROUND TO
2-WIRE
PROTECT
Optical Transceivers
Optical Transponders
Instrumentation and Industrial Controls
RF Power Amps
Diagnostic Monitoring
LOS
4.7k
Dual, Temperature-Controlled Resistors with
or two 20k , 256-position, linear, variable
V
CC
Typical Operating Circuit
1
2
3
4
5
6
7
8
4.7k
*SATISFIES SFF-8472 COMPATIBILITY
SDA
SCL
OUT1
IN1
OUT2
IN2
WPEN
GND
General Description
DS1859
MON3
MON2
MON1
V
H1
H0
CC
L1
L0
Applications
16
15
14
13
12
11
10
9
______________________________________________ Maxim Integrated Products
Rx POWER*
Tx POWER*
Tx BIAS*
0.1 F
V
CC
TO LASER BIAS
CONTROL
TO LASER
MODULATION
CONTROL
= 3.3V
Internally Calibrated Monitors
DECOUPLING
CAP
DIAGNOSTIC
INPUTS
♦ SFF-8472 Compatible
♦ Five Monitored Channels (Temperature, V
♦ Three External Analog Inputs (MON1, MON2, MON3)
♦ Scalable Dynamic Range for External Analog Inputs
♦ Internal Direct-to-Digital Temperature Sensor
♦ Alarm and Warning Flags for All Monitored
♦ Two 50k or Two 20k , Linear, 256-Position,
♦ Resistor Settings Changeable Every 2°C
♦ Access to Monitoring and ID Information
♦ 2-Wire Serial Interface
♦ Two Buffers with TTL/CMOS-Compatible Inputs and
♦ Operates from a 3.3V or 5V Supply
♦ Operating Temperature Range of -40°C to +95°C
+Denotes lead-free package.
Ordering Information continued at end of data sheet.
DS1859B-020
DS1859B-020+
DS1859B-050
DS1859B-050+
MON1, MON2, MON3)
That Support Internal and External Calibration
Channels
Nonvolatile Temperature-Controlled Variable
Resistors
Configurable with Separate Device Addresses
Open-Drain Outputs
A
B
C
D
TOP VIEW
PART
WPEN
OUT2
GND
IN1
1
CSBGA (4mm x 4mm)
1.0mm PITCH
SCL
SDA
IN2
L0
2
MON1
OUT1
V
H0
CC
3
RESISTANCE
Ordering Information
MON3
MON2
Pin Configurations
H1
L1
20k
20k
50k
50k
4
1
2
3
4
5
6
7
8
SDA
SCL
OUT1
IN1
OUT2
IN2
WPEN
GND
DS1859
TSSOP
PIN-PACKAGE
16 CSBGA
16 CSBGA
16 CSBGA
16 CSBGA
Features
MON3
MON2
MON1
CC
V
H1
H0
CC
L1
L0
,
16
15
14
13
12
11
10
9
1

Related parts for DS1859E-020+

DS1859E-020+ Summary of contents

Page 1

... CAP LASER BIAS 14 CONTROL TOP VIEW TO LASER 13 A MODULATION 12 CONTROL 11 Rx POWER POWER* DIAGNOSTIC INPUTS 9 Tx BIAS ______________________________________________ Maxim Integrated Products Features Ordering Information RESISTANCE PIN-PACKAGE 20k 16 CSBGA 20k 16 CSBGA 50k 16 CSBGA 50k 16 CSBGA Pin Configurations 1 SDA V IN1 SCL SCL 3 OUT1 ...

Page 2

Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors ABSOLUTE MAXIMUM RATINGS Voltage Range on V Relative to Ground ...........-0.5V to +6.0V CC Voltage Range on Inputs Relative to Ground* ................................................-0. Voltage Range on Resistor Inputs Relative to Ground* ................................................-0.5V ...

Page 3

Dual, Temperature-Controlled Resistors with ANALOG RESISTOR CHARACTERISTICS (V = 2.85V to 5.5V -40°C to +95°C, unless otherwise noted PARAMETER SYMBOL Position 00h Resistance (50k ) Position FFh Resistance (50k ) Position 00h Resistance (20k ) Position ...

Page 4

Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors AC ELECTRICAL CHARACTERISTICS (V = 2.85V to 5.5V -40°C to +95°C, unless otherwise noted. See Figure 6 PARAMETER SYMBOL SCL Clock Frequency Bus Free Time Between STOP and START ...

Page 5

Dual, Temperature-Controlled Resistors with Note 10: After this period, the first clock pulse is generated. Note 11: The maximum t only has to be met if the device does not stretch the LOW period (t HD:DAT Note 12: A device ...

Page 6

Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors (V = 5.0V +25°C, for both 50k and 20k versions, unless otherwise noted RESISTOR 0 DNL (LSB) 1.0 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 0 ...

Page 7

Dual, Temperature-Controlled Resistors with (V = 5.0V +25°C, for both 50k and 20k versions, unless otherwise noted POSITION 00h RESISTANCE vs. TEMPERATURE 0.38 20k VERSION 0.37 0.36 0.35 0.34 0.33 -40 -25 - ...

Page 8

Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors PIN BALL NAME 1 B2 SDA 2-Wire Serial Data I/O Pin. Transfers serial data to and from the device SCL 2-Wire Serial Clock Input. Clocks data into and out of the ...

Page 9

Dual, Temperature-Controlled Resistors with AD (AUXILIARY DEVICE ENABLE A0h) DEVICE MD (MAIN DEVICE ENABLE) ADDRESS DEVICE ADDRESS ADEN ADFIX SDA ADDRESS 2-WIRE INTERFACE DATA BUS SCL R/W TxF Tx FAULT OUT1 MINT IN1 INV1 RxL LOS OUT2 INV2 IN2 INTERNAL ...

Page 10

Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors Table 1. Scales for Monitor Channels at Factory Setting +FS +FS SIGNAL SIGNAL (hex) Temperature 127.984 C 7FFC V 6.5528V FFF8 CC MON1 2.4997V FFF8 MON2 2.4997V FFF8 MON3 2.4997V FFF8 Table 2. ...

Page 11

Dual, Temperature-Controlled Resistors with Table 4. ADEN Address Configuration ADEN NO. OF SEPARATE (ADDRESS DEVICE ENABLE) ADDRESSES (Main Device only) MAIN DEVICE ENABLE AUXILIARY DEVICE ENABLE DEC 127 128 143 199 Figure 2. ...

Page 12

Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors MAIN DEVICE ENABLE DEC 127 128 143 199 255 Figure 3. Memory Organization, ADEN = 1 above is accessible only through the Main Device address. This memory is organized as ...

Page 13

Dual, Temperature-Controlled Resistors with A description of the registers is below. The registers are read only (R) or read/write (R/W). The R/W registers are writable only if write protect has not been asserted (see the Memory Description section). Auxiliary Device ...

Page 14

Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors Main Device (continued) MEMORY EEPROM/ LOCATION R/W SRAM (hex EEPROM R EEPROM R EEPROM R EEPROM R EEPROM ...

Page 15

Dual, Temperature-Controlled Resistors with Main Device (continued) MEMORY EEPROM/ LOCATION R/W SRAM (hex SRAM SRAM — 6E SRAM — Bit 7 — 6 — R/W 5 — — 4 — — 3 — — ...

Page 16

Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors Main Device (continued) MEMORY EEPROM/ LOCATION R/W SRAM (hex) 4 — R/W 3 — — 2 — — 1 — — 0 — — 70 SRAM R Bit 7 — — 6 — ...

Page 17

Dual, Temperature-Controlled Resistors with Main Device (continued) MEMORY EEPROM/ LOCATION R/W SRAM (hex) 3 — — 2 — — 1 — — 0 — — SRAM — 74 SRAM Bit 7 — — 6 — — 5 ...

Page 18

Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors Main Device (continued) MEMORY EEPROM/ LOCATION R/W SRAM (hex) 75 SRAM R Bit 7 — — 6 — — 5 — — 4 — — 3 — — 2 — — 1 — ...

Page 19

Dual, Temperature-Controlled Resistors with Table 01h MEMORY EEPROM/ LOCATION R/W SRAM (hex) 80 SRAM R/W Bit 7 — — 6 — — 5 — — 4 — — 3 — — 2 — — 1 — — 0 — — ...

Page 20

Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors Table 01h (continued) MEMORY EEPROM/ LOCATION R/W SRAM (hex) 5 — — 4 — — 3 — — 2 — — 1 — — 0 — — EEPROM — 8C ...

Page 21

Dual, Temperature-Controlled Resistors with Table 01h (continued) MEMORY EEPROM/ LOCATION R/W SRAM (hex EEPROM — EEPROM R EEPROM R EEPROM R EEPROM R ...

Page 22

Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors Programming the Look-up Table (LUT) The following equation can be used to determine which resistor position setting, 00h to FFh, should be written in the LUT to achieve a given resistance at a ...

Page 23

Dual, Temperature-Controlled Resistors with An explanation of the binary search used to scale the gain is best served with the following example pseudo- code: /* Assume that the Null input is 0.5V addition, the requirement for LSB ...

Page 24

Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors Main Device address. The control of write privileges through the Auxiliary Device address depends on the value of APEN. Care should be taken with the setting of MPEN, once set ...

Page 25

Dual, Temperature-Controlled Resistors with After receiving a matching address byte with the R/W bit set low, if there is no write protect, the device goes into the write mode of operation (see the Memory Organization section). The master must transmit ...

Page 26

Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors SDA t BUF t LOW SCL t HD:STA STOP START Figure 6. 2-Wire AC Characteristics operation, incremented by one. This data is maintained as long valid. If the most recent ...

Page 27

Dual, Temperature-Controlled Resistors with the data line while the clock line is high will be interpreted as control signals. Accordingly, the following bus conditions have been defined: Bus not busy: Both data and clock lines remain high. Start data transfer: ...

Page 28

... PART RESISTANCE DS1859B-050+T&R 50k DS1859B-050/T&R 50k DS1859E-020 20k DS1859E-020+ 20k DS1859E-020/T&R 20k DS1859E-020+T&R 20k DS1859E-050 50k DS1859E-050+ 50k DS1859E-050+T&R 50k DS1859E-050/T&R 50k +Denotes lead-free package. T&R denotes tape-and-reel package. Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied ...

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