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DS1859
User Manual
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Rainbow Electronics DS1859 User Manual

DS1859
Dual, Temperature-Controlled Resistors with
Internally Calibrated Monitors
______________________________________________ Maxim Integrated Products 1
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.
General Description
Applications
Optical Transceivers
Optical Transponders
Instrumentation and Industrial Controls
RF Power Amps
Diagnostic Monitoring
Features
♦ SFF-8472 Compatible ♦ Five Monitored Channels (Temperature, V
CC
,
MON1, MON2, MON3)
♦ Three External Analog Inputs (MON1, MON2, MON3)
That Support Internal and External Calibration
♦ Scalable Dynamic Range for External Analog Inputs ♦ Internal Direct-to-Digital Temperature Sensor ♦ Alarm and Warning Flags for All Monitored
Channels
♦ Two 50kΩ or Two 20kΩ, Linear, 256-Position,
Nonvolatile Temperature-Controlled Variable Resistors
♦ Resistor Settings Changeable Every 2°C ♦ Access to Monitoring and ID Information
Configurable with Separate Device Addresses
♦ 2-Wire Serial Interface ♦ Two Buffers with TTL/CMOS-Compatible Inputs and
Open-Drain Outputs
♦ Operates from a 3.3V or 5V Supply ♦ Operating Temperature Range of -40°C to +95°C
Ordering Information
Rev 1; 11/03
Pin Configurations
DS1859
SDA
1
2
3
4
5
6
7
8
16
0.1µF
15
14
13 12
11
10
9
SCL
OUT1
IN1
OUT2
IN2
WPEN
GND
V
CC
H1
L1
H0 L0
MON3
MON2
MON1
GROUND TO
DISABLE WRITE
PROTECT
Rx POWER*
DIAGNOSTIC INPUTS
TO LASER MODULATION CONTROL
TO LASER BIAS CONTROL
DECOUPLING CAP
Tx POWER*
Tx BIAS*
*SATISFIES SFF-8472 COMPATIBILITY
V
CC
VCC = 3.3V
4.7kΩ4.7kΩ
Tx-FAULT
LOS
2-WIRE
INTERFACE
Typical Operating Circuit
PART RESISTANCE PIN-PACKAGE
DS1859E-050 50kΩ 16 TSSOP DS1859E-020 20kΩ 16 TSSOP
DS1859E-050/T&R 50kΩ
DS1859E-020/T&R 20kΩ
DS1859B-050 50kΩ 16-Ball CSBGA DS1859B-020 20kΩ 16-Ball CSBGA
16 TSSOP (Tape-and-Reel)
16 TSSOP (Tape-and-Reel)
TOP VIEW
A
B
OUT2
C
WPEN
D
1
CSBGA (4mm x 4mm)
V
SCLIN1
CC
H0SDA
OUT1IN2
L0GND
MON1
324
1.0mm PITCH
H1
L1
MON3
MON2
1
SDA
2
SCL
3
OUT1
IN1
4
DS1859
OUT2
5
IN2
6
WPEN
7
GND
8
TSSOP
V
MON3
MON2
MON1
16
CC
15
H1
14
L1
13
H0
12
L0
11
10
9
DS1859
Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors
2 _____________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Voltage Range on VCCRelative to Ground ...........-0.5V to +6.0V
Voltage Range on Inputs Relative
to Ground* ................................................-0.5V to V
CC
+ 0.5V
Voltage Range on Resistor Inputs Relative
to Ground* ................................................-0.5V to V
CC
+ 0.5V
Current into Resistors............................................................5mA
Operating Temperature Range ...........................-40°C to +95°C
Programming Temperature Range .........................0°C to +70°C
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature .......................................See IPC/JEDEC
J-STD-020A
RECOMMENDED DC OPERATING CONDITIONS
(TA= -40°C to +95°C, unless otherwise noted.)
DC ELECTRICAL CHARACTERISTICS
(VCC= 2.97V to 5.5V, TA= -40°C to +95°C, unless otherwise noted.)
*Not to exceed 6.0V.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
Input Logic 1 (SDA, SCL, WPEN) V
Input Logic 0 (SDA, SCL, WPEN) V
Resistor Inputs (L0, L1, H0, H1) -0.3 VCC + 0.3 V
Resistor Current I
High-Z Resistor Current I
Input Logic Levels (IN1, IN2)
CC
RES
ROFF
(Note 1) 2.97 5.5 V
(Note 2) 0.7 x Vcc VCC + 0.3 V
IH
(Note 2) -0.3 +0.3 x V
IL
Input logic 1 1.5
Input logic 0 0.9
CC
-3 +3 mA
0.001 0.1 µA
V
V
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Current I
Input Leakage I
Low-Level Output Voltage (SDA, OUT1, OUT2)
Full-Scale Input (MON1, MON2, MON3)
Full-Scale VCC Monitor
I/O Capacitance C
WPEN Pullup R
Digital Power-On Reset POD 1.0 2.2 V
Analog Power-On Reset POA 2.0 2.6 V
CC
IL
V
OL1
V
OL2
I/O
WPEN
(Note 3) 1 2 mA
-200 +200 nA
3mA sink current 0 0.4
6mA sink current 0 0.6
At factory setting (Note 4)
At factory setting (Note 5)
2.4875 2.5 2.5125 V
6.5208 6.5536 6.5864 V
10 pF
40 65 100 kΩ
V
DS1859
Dual, Temperature-Controlled Resistors with
Internally Calibrated Monitors
_____________________________________________________________________ 3
DIGITAL THERMOMETER
(VCC= 2.97V to 5.5V, TA= -40°C to +95°C, unless otherwise noted.)
NONVOLATILE MEMORY CHARACTERISTICS
(VCC= 2.97V to 5.5V)
ANALOG VOLTAGE MONITORING
(VCC= 2.97V to 5.5V, TA= -40°C to +95°C, unless otherwise noted.)
ANALOG RESISTOR CHARACTERISTICS
(VCC= 2.97V to 5.5V, TA= -40°C to +95°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Position 00h Resistance (50kΩ)T Position FFh Resistance (50kΩ)T Position 00h Resistance (20kΩ)T Position FFh Resistance (20kΩ)T
Absolute Linearity (Note 6) -2 +2 LSB
Relative Linearity (Note 7) -1 +1 LSB
Temperature Coefficient (Note 8) 50 ppm/°C
= +25°C 0.65 1.0 1.35 kΩ
A
= +25°C 40 50 60 kΩ
A
= +25°C 0.20 0.40 0.55 kΩ
A
= +25°C 16 20 24 kΩ
A
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Resolution ∆VMON 610 µV Supply Resolution ∆V
Input/Supply Accuracy (MON1, MON2, MON3, V
Update Rate for MON1, MON2, MON3, Temp, or V
Input/Supply Offset (MON1, MON2, MON3, V
CC
CC
CC
)
t
)
CC
A
CC
frame
V
OS
At factory setting 0.25 0.5
(Note 14) 0 5 LSB
1.6 mV
% FS
(full scale)
30 45 ms
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Thermometer Error T
ERR
-40°C to +95°C ±3.0 °C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
EEPROM Writes +70°C
50,000
DS1859
Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors
4 _____________________________________________________________________
AC ELECTRICAL CHARACTERISTICS
(VCC= 2.97V to 5.5V, TA= -40°C to +95°C, unless otherwise noted. See Figure 6.)
Note 1: All voltages are referenced to ground. Note 2: I/O pins of fast-mode devices must not obstruct the SDA and SCL lines if V
CC
is switched off.
Note 3: SDA and SCL are connected to V
CC
and all other input signals are connected to well-defined logic levels.
Note 4: Full Scale is user programmable. The maximum voltage that the MON inputs read is approximately Full Scale, even if the volt-
age on the inputs is greater than Full Scale.
Note 5: This voltage defines the maximum range of the analog-to-digital converter voltage, not the maximum V
CC
voltage.
Note 6: Absolute linearity is the difference of measured value from expected value at DAC position. The expected value is a
straight line from measured minimum position to measured maximum position.
Note 7: Relative linearity is the deviation of an LSB DAC setting change vs. the expected LSB change. The expected LSB change
is the slope of the straight line from measured minimum position to measured maximum position.
Note 8: See the Typical Operating Characteristics. Note 9: A fast-mode device can be used in a standard-mode system, but the requirement t
SU:DAT
> 250ns must then be met. This is automatically the case if the device does not stretch the LOW period of the SCL signal. If such a device does stretch the LOW period of the SCL signal, it must output the next data bit to the SDA line t
RMAX
+ t
SU:DAT
= 1000ns + 250ns = 1250ns
before the SCL line is released.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SCL Clock Frequency f
Bus Free Time Between STOP and START Condition
Hold Time (Repeated) START Condition
LOW Period of SCL Clock t
HIGH Period of SCL Clock t
Data Hold Time t
Data Setup Time t
START Setup Time t
Rise Time of Both SDA and SCL Signals
Fall Time of Both SDA and SCL Signals
Setup Time for STOP Condition t
Capacitive Load for Each Bus Line C
EEPROM Write Time t
SCL
t
BUF
t
HD:STA
LOW
HIGH
HD:DAT
SU:DAT
SU:STA
SU:STO
Fast mode (Note 9) 0 400
Standard mode (Note 9) 0 100
Fast mode (Note 9) 1.3
Standard mode (Note 9) 4.7
Fast mode (Notes 9, 10) 0.6
Standard mode (Notes 9, 10) 4.0
Fast mode (Note 9) 1.3
Standard mode (Note 9) 4.7
Fast mode (Note 9) 0.6
Standard mode (Note 9) 4.0
Fast mode (Notes 9, 11, 12) 0 0.9
Standard mode (Notes 9, 11, 12) 0
Fast mode (Note 9) 100
Standard mode (Note 9) 250
Fast mode (Note 9) 0.6
Standard mode (Note 9) 4.7
Fast mode (Note 13) 20 + 0.1C
t
R
Standard mode (Note 13) 20 + 0.1C
Fast mode (Note 13) 20 + 0.1C
t
F
Standard mode (Note 13) 20 + 0.1C
Fast mode 0.6
Standard mode 4.0
(Note 13) 400 pF
B
(Note 14) 10 20 ms
W
B
B
B
B
300
1000
300
300
kHz
µs
µs
µs
µs
µs
ns
µs
ns
ns
µs
DS1859
Dual, Temperature-Controlled Resistors with
Internally Calibrated Monitors
_____________________________________________________________________ 5
Note 10: After this period, the first clock pulse is generated. Note 11: The maximum t
HD:DAT
only has to be met if the device does not stretch the LOW period (t
LOW
) of the SCL signal.
Note 12: A device must internally provide a hold time of at least 300ns for the SDA signal (see the V
IH MIN
of the SCL signal) to
bridge the undefined region of the falling edge of SCL.
Note 13: C
B
—total capacitance of one bus line, timing referenced to 0.9 x VCCand 0.1 x VCC.
Note 14: Guaranteed by design.
Typical Operating Characteristics
(VCC= 5.0V, TA= +25°C, for both 50kΩ and 20kΩ versions, unless otherwise noted.)
TEMPERATURE (°C)
40 60 80200-20
560
600
640
680
720
520
-40 100
SUPPLY CURRENT vs. TEMPERATURE
DS1859 toc01
SUPPLY CURRENT (µA)
SDA = SCL = V
CC
SUPPLY CURRENT vs. VOLTAGE
DS1859 toc02
VOLTAGE (V)
SUPPLY CURRENT (µA)
5.04.54.03.5
450
500
550
600
650
700
400
3.0 5.5
SDA = SCL = V
CC
RESISTANCE vs. SETTING
DS1859 toc03
SETTING (DEC)
RESISTANCE (kΩ)
20015010050
10
20
30
40
50
60
0
0250
50kΩ VERSION
RESISTANCE vs. SETTING
DS1859 toc04
SETTING (DEC)
RESISTANCE (kΩ)
20015010050
5
10
15
20
0
0250
20kΩ VERSION
ACTIVE SUPPLY CURRENT
vs. SCL FREQUENCY
DS1859 toc05
SCL FREQUENCY (kHz)
ACTIVE SUPPLY CURRENT (µA)
300200100
600
640
680
720
760
560
0400
SDA = V
CC
RESISTOR 0 INL (LSB)
DS1859 toc06
SETTING (DEC)
RESISTOR 0 INL (LSB)
225200150 17550 75 100 12525
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0 0250
DS1859
Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors
6 _____________________________________________________________________
Typical Operating Characteristics (continued)
(VCC= 5.0V, TA= +25°C, for both 50kΩ and 20kΩ versions, unless otherwise noted.)
RESISTOR 0 DNL (LSB)
DS1859 toc07
SETTING (DEC)
RESISTOR 0 DNL (LSB)
225200150 17550 75 100 12525
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0 0 250
RESISTOR 1 INL (LSB)
DS1859 toc08
SETTING (DEC)
RESISTOR 1 INL (LSB)
225200150 17550 75 100 12525
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0 0250
RESISTOR 1 DNL (LSB)
DS1859 toc09
SETTING (DEC)
RESISTOR 1 DNL (LSB)
225200150 17550 75 100 12525
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0 0250
POSITION 00h RESISTANCE
vs. TEMPERATURE
DS1859 toc12
TEMPERATURE (°C)
RESISTANCE (kΩ)
20 35 50 65 805-10-25
0.96
0.97
0.98
0.99
1.00
0.95
-40 95
50kΩ VERSION
RESISTANCE
vs. POWER-UP VOLTAGE
DS1859 toc11
POWER-UP VOLTAGE (V)
RESISTANCE (kΩ)
2341
30 20
40
50
60
70
80
90
100
110
120
0
10
05
PROGRAMMED RESISTANCE (80h)
>1MΩ 20kΩ VERSION
RESISTANCE
vs. POWER-UP VOLTAGE
DS1859 toc10
POWER-UP VOLTAGE (V)
RESISTANCE (kΩ)
2341
30 20
40
50
60
70
80
90
100
110
120
0
10
05
PROGRAMMED RESISTANCE (80h)
>1MΩ 50kΩ VERSION
DS1859
Dual, Temperature-Controlled Resistors with
Internally Calibrated Monitors
_______________________________________________________________________________________ 7
Typical Operating Characteristics (continued)
(VCC= 5.0V, TA= +25°C, for both 50kΩ and 20kΩ versions, unless otherwise noted.)
POSITION FFh RESISTANCE
vs. TEMPERATURE
DS1859 toc14
TEMPERATURE (°C)
RESISTANCE (kΩ)
80655035205-10-25
51.20
51.40
51.60
51.80
52.00
51.00
-40 95
50kΩ VERSION
POSITION FFh RESISTANCE
vs. TEMPERATURE
DS1859 toc15
TEMPERATURE (°C)
RESISTANCE (kΩ)
80655035205-10-25
19.20
19.40
19.50
19.80
20.00
19.00
-40 95
20kΩ VERSION
TEMPERATURE COEFFICIENT vs. SETTING
DS1859 toc16
SETTING (DEC)
TEMPERATURE COEFFICIENT (ppm/°C)
20015010050
100
50
0
-50
150
200
250
300
350
400
-100 0250
50kΩ VERSION
+25°C TO +95°C +25°C TO -40°C
TEMPERATURE COEFFICIENT vs. SETTING
DS1859 toc17
SETTING (DEC)
TEMPERATURE COEFFICIENT (ppm/°C)
20015010050
100
0
200
300
400
500
600
700
800
-100 0250
+25°C TO +95°C +25°C TO -40°C
20kΩ VERSION
LSB ERROR vs. FULL-SCALE INPUT
DS1859 toc18
NORMALIZED FULL SCALE (%)
LSB ERROR
755025
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
-8 0100
+3 SIGMA
-3 SIGMA
MEAN
LSB ERROR vs. FULL-SCALE INPUT
DS1859 toc19
NORMALIZED FULL SCALE (%)
LSB ERROR
9.3756.2503.125
-3
-2
-1
0
1
2
3
-4 0 12.500
+3 SIGMA
-3 SIGMA
MEAN
POSITION 00h RESISTANCE
vs. TEMPERATURE
DS1859 toc13
TEMPERATURE (°C)
RESISTANCE (kΩ)
80655035205-10-25
0.34
0.35
0.36
0.37
0.38
0.33
-40 95
20kΩ VERSION
DS1859
Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors
8 _____________________________________________________________________
Detailed Description
The user can read the registers that monitor the VCC, MON1, MON2, MON3, and temperature analog signals. After each signal conversion, a corresponding bit is set that can be monitored to verify that a conversion has occurred. The signals also have alarm and warning flags that notify the user when the signals go above or below the user-defined value. Interrupts can also be set for each signal.
The position values of each resistor can be indepen­dently programmed. The user can assign a unique value to each resistor for every 2°C increment over the
-40°C to +102°C range.
Two buffers are provided to convert logic-level inputs into open-drain outputs. Typically, these buffers are used to implement transmit (Tx) fault and loss-of-signal (LOS) functionality. Additionally, OUT1 can be asserted in the event that one or more of the monitored values go beyond user-defined limits.
Pin Description
PIN BALL NAME FUNCTION
1 B2 SDA 2-Wire Serial Data I/O Pin. Transfers serial data to and from the device.
2 A2 SCL 2-Wire Serial Clock Input. Clocks data into and out of the device.
3 C3 OUT1 Open-Drain Buffer Output
4 A1 IN1 TTL/CMOS-Compatible Input to Buffer
5 B1 OUT2 Open-Drain Buffer Output
6 C2 IN2 TTL/CMOS-Compatible Input to Buffer
7 C1 WPEN
8 D1 GND Ground
9 D3 MON1 External Analog Input
10 D4 MON2 External Analog Input
11 C4 MON3 External Analog Input
12 D2 L0
13 B3 H0
14 B4 L1 Low-End Resistor 1 Terminal
15 A4 H1 High-End Resistor 1 Terminal
16 A3 V
Write Protect Enable. The device is not write protected if WPEN is connected to ground. This pin has an internal pullup (R
Low-End Resistor 0 Terminal. It is not required that the low-end terminals be connected to a potential less than the high-end terminals of the corresponding resistor. Voltage applied to any of the resistor terminals cannot exceed the power-supply voltage, V
High-End Resistor 0 Terminal. It is not required that the high-end terminals be connected to a potential greater than the low-end terminals of the corresponding resistor. Voltage applied to any of the resistor terminals cannot exceed the power-supply voltage, V
Supply Voltage
CC
). See Table 6.
WPEN
, or go below ground.
CC
, or go below ground.
CC
DS1859
Dual, Temperature-Controlled Resistors with
Internally Calibrated Monitors
_____________________________________________________________________ 9
Figure 1. Block Diagram
DEVICE
ADDRESS
ADEN ADFIX
AD (AUXILIARY DEVICE ENABLE A0h)
MD (MAIN DEVICE ENABLE)
DEVICE ADDRESS
ADDRESS
R/W
PROT
AUX
EEPROM
128 x 8 BIT
00h-7Fh
STANDARDS
AD
TABLE
SELECT
ADDRESS
R/W
PROT MAIN
EEPROM
72 x 8 BIT
80h-C7h
TABLE 02
RESISTOR 0
LOOK-UP
TABLE
MD
TABLE
SELECT
ADDRESS
R/W
PROT MAIN
EEPROM
72 x 8 BIT
80h-C7h
TABLE 03
RESISTOR 1
LOOK-UP
TABLE
MD
SDA
SCL
OUT1
OUT2
MON1
MON2
MON3
V
GND
WPEN
2-WIRE
INTERFACE
Tx FAULT
IN1
LOS
IN2
INTERNAL
V
CC
TEMP
V
CC
CC
ADDRESS
DATA BUS
R/W
TxF
ADDRESS
MINT
INV1
RxL
INV2
INTERNAL
CALIBRATION
MUX
R
WPEN
MPEN
MUX CTRL
APEN
PROT AUX
PROT MAIN
V
CC
PROT MAIN
R/W
TxF
RIGHT
SHIFTING
ADC
12-BIT
A/D
CTRL
WARNING FLAGS
MD
EEPROM
96 x 8 BIT
00h-5Fh
LIMITS
SRAM
32 x 8 BIT
60h-7Fh
NOT PROTECTED
MEASUREMENT
ALARM FLAGS
MEASUREMENT
COMP CTRL
ALARM FLAGS
MONITORS LIMIT
HIGH
MONITORS LIMIT
LOW
TEMP INDEX
MINT (BIT)
TABLE SELECT
WARNING FLAGS
DS1859
MONITORS LIMIT HIGH
COMPARATOR
TEMP INDEX
TABLE SELECT
ADDRESS
DEVICE ADDRESS
MONITORS LIMIT LOW
REGISTERREGISTER
RESISTOR 0 50kΩ OR 20kΩ FULL SCALE 256 POSITIONS
RESISTOR 1 50kΩ OR 20kΩ FULL SCALE 256 POSITIONS
PROT
MD R/W
MAIN
TABLE 01
EEPROM
16 x 8 BIT
80h-8Fh
VENDOR
MASKING (TMP, V
INTERRUPT
TEMP INDEX
INV1 (BIT)
INV2 (BIT)
APEN (BIT)
MPEN (BIT)
ADEN (BIT)
ADFIX (BIT)
, MON1, MON2, MON3)
CC
MINT
H0
L0
H1
L1
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