general description the max1407/max1408/max1409/max1414 are low- power, general-purpose, multichannel data-acquisition systems (das). these devices are optimized for low- power applications. all the devices operate from a sin- gle +2.7v to +3.6v power supply and consume a maximum of 1.15ma in run mode and only 2.5? in sleep mode. the max1407/max1408/max1414 feature a differential 8:1 input multiplexer to the adc, a programmable three-state digital output, an output to shutdown an external power supply, and a data ready output from the adc. the max1408 has eight auxiliary analog inputs, while the max1407/max1414 include four auxil- iary analog inputs and two 10-bit force/sense dacs. the max1414 features a 50mv trip threshold for the signal-detect comparator while the others have a 0mv trip threshold. the max1409 is a 20-pin version of the das family with a differential 4:1 input multiplexer to the adc, one auxiliary analog input, and one 10-bit force/sense dac. the max1407/max1408/max1414 are available in space-saving 28-pin ssop packages, while the max1409 is available in a 20-pin ssop package. applications medical instruments industrial control systems portable equipment data-acquisition system automatic testing robotics features +2.7v to +3.6v supply voltage range in standby, idle, and run mode (down to 1.8v in sleep mode) 1.15ma run mode supply current 2.5? sleep mode supply current (wake-up, rtc, and voltage monitor active) multichannel 16-bit sigma-delta adc ?.5 lsb (typ) integral nonlinearity 30hz or 60hz continuous conversion rate buffered or unbuffered mode gain of +1/3, +1, or +2v/v unipolar or bipolar mode on-chip offset calibration 10-bit force/sense dacs buffered 1.25v, 18ppm/? (typ) bandgap reference output spi /qspi or microwire -compatible serial interface system support functions rtc (valid til 9999) and alarm high-frequency pll clock output (2.4576mhz) +1.8v and +2.7v reset and power-supply voltage monitors signal detect comparator interrupt generator ( int and drdy ) three-state digital output wake-up circuitry 28-pin ssop (max1407/max1408/max1414), 20-pin ssop (max1409) max1407/max1408/max1409/max1414 low-power, 16-bit multichannel das with internal reference,10-bit dacs, and rtc ________________________________________________________________ maxim integrated products 1 19-2229; rev 0; 10/01 pin configurations continued at end of data sheet. typical operating circuit appears at end of data sheet. spi and qspi are trademarks of motorola, inc. microwire is a trademark of national semiconductor corp. ordering information part temp. range pin-package max1407 cai 0 c to +70 c 28 ssop max1408 cai 0 c to +70 c 28 ssop max1409 cap 0 c to +70 c 20 ssop max1414 cai 0 c to +70 c 28 ssop 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 out2 in3 dv dd dgnd sclk din dout clkin clkout fout in2 in1 cpll av dd agnd ref in0 out1 fb1 do fb2 top view max1407 max1414 cs wu2 reset wu1 int drdy shdn pin configurations for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com.
max1407/max1408/max1409/max1414 low-power, 16-bit multichannel das with internal reference,10-bit dacs, and rtc 2 _______________________________________________________________________________________ absolute maximum ratings stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. av dd to agnd .........................................................-0.3v to +6v av dd to dv dd ...................................................... -0.3v to +0.3v analog inputs to agnd .........................-0.3v to +(av dd + 0.3v) digital inputs to dgnd.............................................-0.3v to +6v maximum current input into any pin ..................................50ma continuous power dissipation (t a = +70?) 20-pin ssop (derate 8.0mw/? above +70?) ...........640mw 28-pin ssop (derate 9.52mw/? above +70?) .........762mw dv dd to dgnd.........................................................-0.3v to +6v agnd to dgnd.....................................................-0.3v to +0.3v analog outputs to agnd ......................-0.3v to +(av dd + 0.3v) digital outputs to dgnd .......................-0.3v to +(av dd + 0.3v) ref to agnd.........................................-0.3v to +(av dd + 0.3v) operating temperature range: max14__ca_ ......................................................0? to +70? max14__ea_ ...................................................-40? to +85? lead temperature (soldering, 10s) ................................+300 ? storage temperature range .............................-65? to +150? junction temperature ......................................................+150? electrical characteristics (dv dd = av dd = +2.7v to 3.6v, 4.7? at ref, internal v ref , 18nf between cpll and av dd , 32.768khz crystal across clkin and clkout, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) parameter symbol conditions min typ max u n i t s adc accuracy resolution (no missing codes) res 16 bits unbuffered mode, unipolar mode, gain = 1, v neg = 0.2v, fully differential input (note 7) 1.5 3.5 u nb uffer ed m od e, u ni p ol ar m od e, g ai n = 2, v n e g = 0.625v , p seud o- d i ffer enti al i np ut 1.75 unbuffered mode, bipolar mode, gain = 1, v neg = 0.625v, fully differential input 1.70 integral nonlinearity inl buffered mode, bipolar mode, gain = 2, v neg = 0.625v, fully differential input 2.50 lsb gain = 2 5 gain = 1 ?0 unipolar gain = 1/3 ?0 gain = 2 8 gain = 1 ?6.5 output rms noise (note 1) bipolar mode gain = 1/3 ?8.5 ? rms offset error on-chip calibration removes this error ? % of fs r offset drift ?.5 ?/? gain error excludes offset and reference errors ? % of fs r gain drift excludes offset and reference errors ? p p m / c
max1407/max1408/max1409/max1414 low-power, 16-bit multichannel das with internal reference,10-bit dacs, and rtc _______________________________________________________________________________________ 3 electrical characteristics (continued) (dv dd = av dd = +2.7v to 3.6v, 4.7? at ref, internal v ref , 18nf between cpll and av dd , 32.768khz crystal across clkin and clkout, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) parameter symbol conditions min typ max u n i t s 1/3 1 pga gain see pga gain section 2 v/v power-supply rejection ratio gain = 1, unipolar and buffered mode 70 db rate bit = 0 30 output update rate continuous conversion rate bit = 1 60 hz turn-on time excluding reference 50 s signal detect comparator max1407/max1408/max1409 -10 0 10 differential input-detection threshold voltage max1414 44 50 56 mv common-mode input voltage 0 0.8 v turn-on time 10 s analog inputs adc gain = 1 0 v ref adc gain = 2 0 v ref/2 unipolar mode adc gain = 1/3 0 av dd adc gain = 1 -v ref v ref adc gain = 2 -v ref/2 v ref/2 differential input voltage range bipolar mode adc gain = 1/3 -av dd av dd v unbuffered -0.05 av dd absolute input voltage range buffered 0.05 1.40 v unbuffered agnd av dd common-mode input voltage range buffered 0.05 1.40 v common-mode rejection ratio gain = 1, unipolar and buffered mode 90 db 30hz data rate 15.360 input sampling rate fout = 2.4576mhz 60hz data rate 30.720 khz input current buffered mode 0.5 na input capacitance 15 pf f o r c e- sen se d a c ( al l m easur em ents m ad e w i th fb1( 2) shor ted to o u t1( 2) , unl ess other w i se noted ) . ( m ax 1407/m ax 1409/m ax 1414 onl y) resolution 10 bits differential nonlinearity guaranteed monotonic (note 2) 1.0 lsb integral nonlinearity (note 2) 1.0 lsb offset error (note 3) 20 mv offset drift 5 v/ c gain error excludes offset and reference drift 3.6 mv gain drift excludes offset and reference drift 10 ppm/ c line regulation 190 v/v current into fb1(2) 0.5 na
max1407/max1408/max1409/max1414 low-power, 16-bit multichannel das with internal reference,10-bit dacs, and rtc 4 _______________________________________________________________________________________ electrical characteristics (continued) (dv dd = av dd = +2.7v to 3.6v, 4.7f at ref, internal v ref , 18nf between cpll and av dd , 32.768khz crystal across clkin and clkout, t a = t min to t max , unless otherwise noted. typical values are at t a = +25 c.) parameter symbol conditions min typ max u n i t s output slew rate 010hex to 3ffhex and 3ffhex to 010hex cod e sw i ng , r l = 12k ? , c l = 200p f 18.0 v/ms output settling time to 1/2 lsb (at 10-bit accuracy) of full- scale with code transition from 010hex to 3ffhex, r l = 12k ? , c l = 200pf 65 s turn-on time 100 s out1, out2 output range no load (note 4) 0.05 av dd - 0.2 v external reference (internal reference powered down) input voltage range 1.25 0.10 v input resistance 540 k ? input current 2.3 a internal reference (av dd = 3v, unless otherwise noted) output voltage t a = +25 c 1.225 1.25 1.275 v output voltage temperature coefficient 18 p p m / c output short-circuit current 3.4 ma line regulation ? v re f / ? v dd 2.7 |