DS4424N+ Fast Delivery |IC PHOENIX CO.,LIMITED

DS4424N+ ,Two-/Four-Channel, I²C, 7-Bit Sink/Source Current DACApplications ♦ I C-Compatible Serial Interface♦ Two Address Pins Allow Four Devices on SamePower-Su ..
DS4432U+ ,Dual-Channel, I²C Adjustable Sink/Source Current DACApplications ♦ I C-Compatible Serial Interface♦ Low CostPower-Supply AdjustmentPower-Supply Margini ..
DS4510U-10 ,CPU Supervisor with Nonvolatile Memory and Programmable I/OApplicationsOrdering InformationRAM-Based FPGA Bank Switching for V TRIP PIN-CC PART TEMP RANGEMult ..
DS4510U-10+ ,CPU Supervisor with Nonvolatile Memory and Programmable I/OApplicationsOrdering InformationRAM-Based FPGA Bank Switching for V TRIP PIN-CC PART TEMP RANGEMult ..
DS4510U-15 ,CPU Supervisor with Nonvolatile Memory and Programmable I/OELECTRICAL CHARACTERISTICS(V = 2.7V to 5.5V, T = -40°C to +85°C.)CC APARAMETER SYMBOL CONDITIONS MI ..
DS4510U-15+ ,CPU Supervisor with Nonvolatile Memory and Programmable I/OFeaturesThe DS4510 is a CPU supervisor with integrated 64-♦ Accurate 5%, 10%, or 15% 5V Power-Suppl ..
EC2-12NU ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-24 ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-24NU ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-4.5NJ ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-4.5NU ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE
EC2-4.5TNU ,COMPACT AND LIGHTWEIGHT, SMALL MOUNTING SIZE, HIGH BREAKDOWN VOLTAGE

DS4424N+
Two-/Four-Channel, I²C, 7-Bit Sink/Source Current DAC
General Description
The DS4422 and DS4424 contain two or four I2C pro-
grammable current DACs that are each capable of
sinking and sourcing current up to 200µA. Each DAC
output has 127 sink and 127 source settings that are
programmed using the I2C interface. The current DAC
outputs power up in a high-impedance state.
Applications
Power-Supply Adjustment
Power-Supply Margining
Adjustable Current Sink or Source
FeaturesTwo (DS4422) or Four (DS4424) Current DACsFull-Scale Current 50µA to 200µAFull-Scale Range for Each DAC Determined by
External Resistors127 Settings Each for Sink and Source ModesI2C-Compatible Serial InterfaceTwo Address Pins Allow Four Devices on Same
I2C BusLow CostSmall Package (14-Pin, 3mm x 3mm TDFN)-40°C to +85°C Temperature Range2.7V to 5.5V Operating Range
DS4422/DS4424wo-/Four-Channel, I2C, 7-Bit Sink/Source
Current DAC
DC-DC
CONVERTER
OUT
SDA
SCLOUT0
OUT1
GND
RFS0RFS1
RPURPUVCC
VCCVOUT0
FS0FS1
R0B
R0ADC-DC
CONVERTER
OUT
VOUT1
R1B
R1A
DS4422/
DS4424
Typical Operating Circuit
Ordering Information
19-4744; Rev 1; 7/09
+Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
EP = Exposed pad.
PART OUTPUTS TEMP RANGE PIN-
PACKAGE
DS4422N+ 2 -40°C to +85°C 14 TDFN-EP
DS4422N+T&R 2 -40°C to +85°C 14 TDFN-EP
DS4424N+ 4 -40°C to +85°C 14 TDFN-EP
DS4424N+T&R 4 -40°C to +85°C 14 TDFN-EP
Pin Configuration appears at end of data sheet.
DS4422/DS4424wo-/Four-Channel, I2C, 7-Bit Sink/Source
Current DAC
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONS
(TA= -40°C to +85°C.)
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 VCC, SDA, and SCL
Relative to Ground.............................................-0.5V to +6.0V
Voltage Range on A0, A1, FS0, FS1, FS2, FS3,
OUT0, OUT1, OUT2, and OUT3 Relative to
Ground................-0.5V to (VCC+ 0.5V) (Not to exceed 6.0V.)
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range.............................-55°C to +125°C
Soldering Temperature...............................Refer to the IPC/JEDEC
J-STD-020 Specification.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage VCC (Note 1) 2.7 5.5 V
Input Logic 1 (SDA, SCL, A0, A1) VIH 0.7 x VCC VCC + 0.3 V
Input Logic 0 (SDA, SCL, A0, A1) VIL -0.3 0.3 x VCC V
Full-Scale Resistor Values RFS0, RFS1,
RFS2, RFS3(Note 2) 40 160 k
DC ELECTRICAL CHARACTERISTICS
(VCC= +2.7V to +5.5V, TA= -40°C to +85°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DS4422 250 Supply Current ICCVCC = 5.5V
(Note 3) DS4424 250 μA
Input Leakage (SDA, SCL) IIL VCC = 5.5V 1 μA
Output Leakage (SDA) IL 1 μA
VOL = 0.4V 3 Output Current Low (SDA) IOLVOL = 0.6V 6 mA
RFS Voltage VRFS 0.976 V
I/O Capacitance CI/O 10 pF
OUTPUT CURRENT SOURCE CHARACTERISTICS
(VCC= +2.7V to +5.5V, TA= -40°C to +85°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Voltage for Sinking Current VOUT:SINK (Note 4) 0.5 3.5 V
Output Voltage for Sourcing
Current VOUT:SOURCE (Note 4) 0 VCC -
0.75 V
Full-Scale Sink Output Current IOUT:SINK (Notes 1, 4) 50 200 μA
Full-Scale Source Output Current IOUT:SOURCE (Notes 1, 4) -200 -50 μA
Output Current Full-Scale
Accuracy IOUT:FS+25°C, VCC = 3.3V; using 0.1% RFS
resistor (Note 2), VOUT0 = VOUT1 = 1.2V ±6 %
Output Current Temperature IOUT:TC (Note 5) ±75 ppm/°C
DS4422/DS4424wo-/Four-Channel, I2C, 7-Bit Sink/Source
Current DAC
Note 1:All voltages with respect to ground. Currents entering the IC are specified positive, and currents exiting the IC are negative.
Note 2:Input resistors (RFS) must be between the speciifed values to ensure the device meets its accuracy and linearity specifications.
Note 3:Supply current specified with all outputs set to zero current setting. A0 and A1 are connected to GND. SDA and SCL are con-
nected to VCC. Excludes current through RFS resistors (IRFS). Total current including IRFSis ICC+ (2 x IRFS).
Note 4:The output-voltage range must be satisfied to ensure the device meets its accuracy and linearity specifications.
Note 5:Temperature drift excludes drift caused by external resistor.
Note 6:Differential linearity is defined as the difference between the expected incremental current increase with respect to position
and the actual increase. The expected incremental increase is the full-scale range divided by 127.
Note 7:Guaranteed by design.
Note 8:Integral linearity is defined as the difference between the expected value as a function of the setting and the actual value.
The expected value is a straight line between the zero and the full-scale values proportional to the setting.
Note 9:Timing shown is for fast-mode (400kHz) operation. This device is also backward compatible with I2C standard-mode timing.
Note 10:CB—total capacitance of one bus line in pF.
OUTPUT CURRENT SOURCE CHARACTERISTICS (continued)
(VCC= +2.7V to +5.5V, TA= -40°C to +85°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC source 0.32 Output Current Variation Due to
Power-Supply Change DC sink 0.42 %/V
DC source, VOUT measure at 1.2V 0.16 Output Current Variation Due to
Output-Voltage Change DC sink, VOUT measure at 1.2V 0.16 %/V
Output Leakage Current at Zero
Current Setting IZERO -1 +1 μA
Output Current Differential
Linearity DNL (Notes 6, 7) -0.5 +0.5 LSB
Output Current Integral Linearity INL (Notes 7, 8) -1 +1 LSB
AC ELECTRICAL CHARACTERISTICS
(VCC= +2.7V to +5.5V, TA= -40°C to +85°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SCL Clock Frequency fSCL (Note 9) 0 400 kHz
Bus Free Time Between STOP
and START Conditions tBUF 1.3 μs
Hold Time (Repeated) START
Condition tHD:STA 0.6 μs
Low Period of SCL tLOW 1.3 μs
High Period of SCL tHIGH 0.6 μs
Data Hold Time tDH:DAT 0 0.9 μs
Data Setup Time tSU:DAT 100 ns
START Setup Time tSU:STA 0.6 μs
SDA and SCL Rise Time tR (Note 10) 20 + 0.1CB 300 ns
SDA and SCL Fall Time tF (Note 10) 20 + 0.1CB 300 ns
STOP Setup Time tSU:STO 0.6 μs
SDA and SCL Capacitive
Loading CB (Note 10) 400 pF
DS4422/DS4424wo-/Four-Channel, I2C, 7-Bit Sink/Source
Current DAC
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
DS4422/4 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
DOES NOT INCLUDE CURRENT DRAWN BY
RESISTORS CONNECTED TO FS0, FS1, FS2,
OR FS3
SUPPLY CURRENT
vs. TEMPERATURE
DS4422/4 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (6040200-20
VCC = 5.0V
VCC = 2.7V
VCC = 3.3V
DOES NOT INCLUDE CURRENT DRAWN BY
RESISTORS CONNECTED TO FS0, FS1, FS2,
OR FS3
VOLTCO (SOURCE)
DS4422/4 toc03
VOUT (V)
IOUT
40kΩ LOAD ON FS0, FS1, FS2, AND FS3
VOLTCO (SINK)
DS4422/4 toc04
VOUT (V)
IOUT
40kΩ LOAD ON FS0, FS1, FS2, AND FS3
TEMPERATURE COEFFICIENT
vs. SETTING (SOURCE)
DS4422/4 toc05
SETTING (DEC)
TEMPERATURE COEFFICIENT (
C/ppm)
+25°C TO -40°C
+25°C TO +85°C
FOR THE 50μA TO 200μA CURRENT SOURCE
RANGE
TEMPERATURE COEFFICIENT
vs. SETTING (SINK)
DS4422/4 toc06
SETTING (DEC)
TEMPERATURE COEFFICIENT (
C/ppm)
+25°C TO -40°C
+25°C TO +85°C
FOR THE 50μA TO 200μA CURRENT SINK
RANGE
INTEGRAL LINEARITY
DS4422/4 toc07
SETTING (DEC)
INL (LSB)
FOR THE 50μA TO 200μA CURRENT SOURCE
AND SINK RANGE
DIFFERENTIAL LINEARITY
DS4422/4 toc08
SETTING (DEC)
DNL (LSB)
FOR THE 50μA TO 200μA CURRENT SOURCE
AND SINK RANGE
DS4422/DS4424wo-/Four-Channel, I2C, 7-Bit Sink/Source
Current DAC
VCC
VCC
RFS0RFS1RFS2RFS3
SDASCLA1A0
GND
FS0FS1
OUT1OUT0
CURRENT
DAC0
F8h F9h
SOURCE OR
SINK MODE
FS2
OUT2
FS3
OUT3
CURRENT
DAC3
127 POSITIONS
EACH FOR SINK
AND SOURCE
MODE
FAh FBh
CURRENT
DAC1
CURRENT
DAC2
I2C-COMPATIBLE
SERIAL INTERFACEDS4422/DS4424
DS4424 ONLY
Block Diagram
PIN
DS4424DS4422NAMEFUNCTION
1 1 SDA I2C Serial Data. Input/output for I2C data.
2 2 SCL I2C Serial Clock. Input for I2C clock.
3 3 GND Ground
4 — FS3
5 — FS2
6 6 FS1
7 7 FS0
Full-Scale Calibration Input. A resistor to ground on these pins determines the full-scale
current for each output. FS0 controls OUT0, FS1 controls OUT1, etc. (The DS4422 has
only two inputs: FS0 and FS1.)
8 8 OUT0
10 10 OUT1
12 — OUT2
14 — OUT3
Current Output. Sinks or sources the current determined by the I2C interface and the
resistance connected to FSx. (The DS4422 has only two outputs: OUT0 and OUT1.)
9, 11 9, 11 A0, A1 Address Select Inputs. Determines the I2C slave address by connecting VCC or GND.
See the Detailed Description section for the available device addresses.
13 13 VCC Power Supply 4, 5, 12, N.C. No Connection — EP Exposed Pad. Connect to GND or leave unconnected.
Pin Description
DS4422/DS4424wo-/Four-Channel, I2C, 7-Bit Sink/Source
Current DAC
Detailed Description
The DS4422/DS4424 contain two or four I2C adjustable
current sources that are each capable of sinking and
sourcing current. Each output (OUT0, OUT1, OUT2, and
OUT3) has 127 sink and 127 source settings that can be
controlled by the I2C interface. The full-scale ranges
and corresponding step sizes of the outputs are deter-
mined by external resistors, connected to pins FS0, FS1,
FS2, and FS3, that can adjust the output current over a
4:1 range. Pins OUT2, OUT3, FS2, and FS3 are only
available on the DS4424.
The formula to determine RFS(connected to the FSx
pins) to attain the desired full-scale current range is:
Equation 1:
Where IFSis the desired full-scale current value, VRFSis
the RFSvoltage (see the DC Electrical Characteristics
table), and RFSis the external resistor value.
To calculate the output current value (IOUT) based on the
corresponding DAC value (see Table 1 for corresponding
memory addresses), use equation 2.
Equation 2:
On power-up the DS4422/DS4424 output zero current.
This is done to prevent them from sinking or sourcing an
incorrect amount of current before the system host con-
troller has had a chance to modify the device’s setting.
As a source for biasing instrumentation or other circuits,
the DS4422/DS4424 provide a simple and inexpensive
current source with an I2C interface for control. The
adjustable full-scale range allows the application to get
the most out of its 7-bit sink or source resolution.
When used in adjustable power-supply applications
(see Typical Operating Circuit), the DS4422/DS4424 do
not affect the initial power-up voltage of the supply
because they default to providing zero output current on
power-up. As the devices source or sink current into the
feedback-voltage node, they change the amount of out-
put voltage required by the regulator to reach its steady-
state operating point. Using the external resistor, RFS, to
set the output current range, the DS4422/DS4424 pro-
vide some flexibility for adjusting the impedances of the
feedback network or the range over which the power
supply can be controlled or margined.2C Slave Address
The DS4422/DS4424 respond to one of four I2Cslave
addresses determined by the two address inputs, A0
and A1. The address inputs should be connected to
either VCCor ground. Table 1 lists the slave addresses
determined by the address input combinations.
Memory Organization
To control the DS4422/DS4424’s current sources, write
to the memory addresses listed in Table 2.
The format of each output control register is given by:
Where:DIOUTFS=×ACValuedec()VIFSRFS××127
Table 1. Slave AddressesA0SLAVE ADDRESS
(HEX)
GND GND 20h
GND VCC 60h
VCC GND A0h
VCC VCC E0h
Table 2. Memory Addresses
MEMORY ADDRESS
(HEX)CURRENT SOURCE
F8h OUT0
F9h OUT1
FAh* OUT2*
FBh* OUT3*
*Only for DS4424.
MSBLSB
SD6D5D4D3D2D1D0
BITNAMEFUNCTIONPOWER-ON
DEFAULT Sign
Bit
Determines if DAC sources or
sinks current. For sink
S = 0; for source S = 1.
0b
DX Data
7-Bit Data Controlling DAC
Output. Setting 0000000b
outputs zero current regardless
of the state of the sign bit.
0000000b

Partno	Mfg	Dc	Qty	Available	Descript
DS4424N+ \|DS4424N	MAXIM	N/a	10274	avai	Two-/Four-Channel, I²C, 7-Bit Sink/Source Current DAC