DS4426 19-4541 Rev 1 7/09 2 Quad-Channel, I C-Margining IDACs with Three Channels of Power-Supply Tracking General Description Features 2 The DS4426 contains four I C-adjustable current DACs Four Current DACs capable of sinking or sourcing current. External resis- 50A to 200A Adjustable Full-Scale Range tors set the full-scale range of each output. Each DAC 127 Settings Each for Sink and Source output has 127 sink and 127 source steps that are pro- 2 Power-Supply Tracking grammed by the I C interface. Power-supply tracking functionality is provided for three channels using dedi- Power-Supply Sequencing cated control inputs. Once power-supply tracking is Ramp-Up and Ramp-Down Tracking Control accomplished, the current outputs default to zero. Two Ratiometric Tracking Support address pins allow up to four DS4426 devices to exist +2.7V to +5.5V Operation 2 on the same I C bus. 2 I C-Compatible Serial Interface Applications Two Address Input Pins Allow Up to Four Devices 2 Power-Supply Adjustment on Same I C Bus Power-Supply Margining Lead-Free, 28-Pin TQFN Package (4mm x 4mm) with Exposed Pad Power-Supply Tracking Industrial Temperature Range: -40C to +85C Adjustable Current Sink or Source Ordering Information Pin Configuration PART TEMP RANGE PIN-PACKAGE TOP VIEW DS4426T+ -40C to +85C 28 TQFN-EP* DS4426T+T&R -40C to +85C 28 TQFN-EP* 21 20 19 18 17 16 15 +Denotes a lead(Pb)-free/RoHS-compliant package. T&R = Tape and reel. 14 FS1 22 INN2 *EP = Exposed pad. FS2 13 INP2 23 24 12 INN1 FS3 INP1 GAIN3 25 11 DS4426 GAIN2 26 10 A1 GAIN1 27 *EP 9 A0 Functional Diagram appears at end of data sheet. + 8 N.C. 28 GND 12 3 45 6 7 THIN QFN (4mm 4mm) *EXPOSED PAD. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. SDA FS0 SCL THR1 V CC THR2 OUT0 DNC OUT1 THR3 OUT2 INN3 INP3 OUT32 Quad-Channel, I C-Margining IDACs with Three Channels of Power-Supply Tracking ABSOLUTE MAXIMUM RATINGS Voltage Range on SDA, SCL Relative to GND......-0.5V to +6.0V Operating Temperature Range ...........................-40C to +85C Voltage Range on V Relative to GND ...............-0.5V to +6.0V Storage Temperature Range .............................-55C to +125C CC Voltage Range on A0, A1, FS 3:0 , GAIN 3:1 , Soldering Temperature...........................Refer to the IPC/JEDEC INN 3:1 , INP 3:1 , THR 3:1 , and OUT 3:0 J-STD-020 Specification. Relative to GND ......................................-0.5V to (V + 0.5V)* CC *Not to exceed +6.0V. 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. RECOMMENDED OPERATING CONDITIONS (T = -40C to +85C.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V (Note 1) 2.7 5.5 V CC Input Logic 1 0.7 x V + CC V V IH (SDA, SCL, A0, A1) V 0.3 CC Input Logic 0 0.3 x V -0.3 V IL (SDA, SCL, A0, A1) V CC Full-Scale Resistor Values R (Note 2) 40 160 k FS 3:0 DC ELECTRICAL CHARACTERISTICS (V = +2.7V to +5.5V, T = -40C to +85C.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Current I V = +5.5V (Note 3) 0.9 mA CC CC Input Leakage Current I V = +5.5V -1 +1 A IL CC (SDA, SCL) RFS Voltage V T = +25C 0.940 0.990 1.040 V RFS A Reference Voltage V 1.24 V REF Temperature Coefficient 100 ppm/C Output Leakage Current (SDA) I -1 +1 A L V = +0.4V 3 OL Output-Current Low (SDA) I mA OL V = +0.6V 6 OL I/O Capacitance C 10 pF I/O DAC OUTPUT CURRENT CHARACTERISTICS (V = +2.7V to +5.5V, T = -40C to +85C.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC source, V measured at +1.2V 0.33 Output Current Variation Due to OUT %/V Power-Supply Change DC sink, V measured at +1.2V 0.33 OUT DC source, V = +3.6V 0.15 Output Current Variation Due to CC %/V Output-Voltage Change DC sink, V = +3.6V 0.30 CC 2 DS4426