features ? ? ? ? ? 200ns maximum acquisition time ? ? ? ? ? 0.01% accuracy ? ? ? ? ? 100ns maximum sample-hold settling time ? ? ? ? ? 74db feedthrough attenuation ? ? ? ? ? 50ps aperture uncertainty ? ? ? ? ? industry standard general description datel?s SHM-4860 is a high-speed, highly accurate sample- hold amplifier designed for precision, high-speed analog signal processing applications. manufactured using modern, high- quality hybrid technology, the SHM-4860 features excellent dynamic specifications including a maximum acquisition time of only 200ns for a 10v step to 0.01%. sample-to-hold settling time, to 0.01% accuracy, is 100ns maximum with an aperture uncertainty of 50ps. the SHM-4860 is a complete sample-hold circuit, containing a precision mos hold capacitor and a mosfet switching configuration which results in faster switching and better feedthrough attenuation. additionally, a fet-input amplifier design allows faster acquisition and settling times while maintaining a considerably lower droop rate. figure 1. functional block diagram datel, inc. , 11 cabot boulevard, mansfield, ma 02048-1194 (u.s.a.) tel: 508-339-3000 fax: 508-339-6356 ? for immediate assistance 800 -233-2765 pin function pin function 1 output 24 +15v supply 2 n.c. 23 ground 3 n.c. 22 ?15v supply 4 n.c. 21 ground 5 n.c. 20 n.c. 6 n.c. 19 n.c. 7 n.c. 18 n.c. 8 n.c. 17 n.c. 9 +5v supply 16 n.c. 10 ground 15 ground 11 hold command 14 n.c. 12 hold command 13 input input/output connections innovation and ex c ell e n c e ? ? SHM-4860 industry-standard, high-speed 0.01% sample-hold amplifiers + 10 15 21 23 internal supply bypass capacitors 9 +5v supply 24 +15v suppl y 22 ?15v supply 1 output c h 1k input 13 hold command 11 hold command 12 switch driver system ground 1k
sample-and-hold amplifiers SHM-4860 ? ? physical/environmental operating temperature ranges SHM-4860mc 0 to +70c (ambient) SHM-4860mm, 883 ?55 to +125c (case) storage temperature range ?65 to +150c package type 24-pin ceramic ddip footnotes: ? input signal should not exceed the supply voltage. ? the SHM-4860?s output is current limited at approximately 65ma. the device can withstand a sustained short to ground. however, shorts from the output to either supply will cause permanent damage. for normal operation, the load current should not exceed 40ma. ? full scale (fs) = 10v. full scale range (fsr) = 20v. ? sample-to-hold offset error (pedestal) is constant regardless of input/output level. ? units are ppm of fsr/c. absolute maximum ratings 15v supply voltages, pins 24, 22 18v +5v supply voltage, pin 9 ?0.5v to +7v analog input, pin 13 ? 18v digital inputs, pins 11, 12 ?0.5v to +7v output current ? 65ma functional specifications (typical at +25c with 15v and +5v supplies unless otherwise noted.) analog input/output min. typ. max. units input/output voltage range ? 10.25 11.25 ? v input impedance ?1?k ? output current ? ? ? 40 ma output impedance 0.1 ? k ? maximum capacitive load ? 250 ? pf digital input input logic level logic "1" +2.0 ? +5.0 v logic "0" 0 ? +0.8 v loading logic "1" ? ? +40 a logic "0" ? ? ?1.6 ma transfer characteristics gain ? ?1 ? v/v gain accuracy ? 0.05 0.1 % gain linearity error ? ? 0.005 0.01 %fs sample-mode offset voltage ? 0.5 5 mv sample-to-hold offset error ? (pedestal) ? 2.5 20 mv gain tempco (drift) ? 0.5 5 ppm/c sample-mode offset drift ? 3 15 ? sample-to-hold offset drift ?4? ? dynamic characteristics acquisition time 10v to 0.01%fs ? 160 200 ns 10v to 0.1%fs ? 100 170 ns 10v to 1%fs ? 90 ? ns 1v to 1%fs ? 75 ? ns sample-to-hold settling time 10v to 0.01%fs ? 60 100 ns 10v to 0.1%fs ? 40 ? ns sample-to-hold transient ? 180 ? mv p-p aperture delay time ?6?ns aperture uncertainty (jitter) ? 50 ? ps output slew rate ? 300 ? v/ s small signal bandwidth (?3db) ? 16 ? mhz droop: +25c ? 0.5 5 v/ s +70c ? 15 ? v/ s +125c ? 1.2 ? mv/ s feedthrough attenuation ?74?db overload recovery time positive ? 200 ? ns negative ? 700 ? ns power requirements voltage range: 15v supplies ? 3 ? % +5v supply ? 5 ? % power supply rejection ratio ? 0.5 ? mv/v quiescent current drain +15v supply ? +21 +25 ma ?15v supply ? ?22 ?25 ma +5v supply ? +17 +25 ma power consumption ? 730 875 mw technical notes 1. all ground pins (10, 15, 21, 23) should be tied together and connected to system analog ground as close to the package as possible. it is recommended to use a ground plane under the device and solder all four ground pins directly to it. care must be taken to ensure that no ground potentials can exist between pin 10 and the other ground pins. 2. although the power supply pins (9, 22, 24) are internally bypassed to ground with 0.01f ceramic capacitors, additional external 0.1f to 1f tantalum bypass capacitors may be required in critical applications. 3. a logic "0" on the hold command input (pin 11), or a logic "1" on the hold command input (pin 12), will put the device in the sample mode. in this mode, the device acts as an inverting unity-gain amplifier, and its output will track its input. a logic "1" on pin 11 (logic "0" on pin 12) will put the device in the hold mode, and the output will be held constant at the last input level present when the hold command was given. if the hold command input (pin 11) is used to control the device, pin 12 must be tied to digital ground. if hold command input (pin 12) is used to control the device, pin 11 must be tied to +5v. 4. the maximum capacitive load to avoid oscillation is typically 250pf. recommended resistive load is 500 ? , although values as low as 250 ? may be used. acquisition and sample-to-hold settling times are relatively unaffected by resistive loads down to 250 ? and capacitive loads up to 50pf. however, higher capacitances will affect both acquisition and settling time.
SHM-4860 ? ? ordering information model number operating temp. range SHM-4860mc 0 to +70c SHM-4860mm ?55 to +125c SHM-4860/883 ?55 to +125c contact datel for 883 product specifications. mechanical dimensions inches (mm) 0.200 max. (5.080) 0.235 max. (5.969) 0.600 0.010 (15.240) 0.80 max. (20.32) 0.100 typ. (2.540) 0.100 (2.540) 0.018 0.002 (0.457) 0.100 (2.540) 0.040 (1.016) 1.31 max. (33.27) 112 13 24 1.100 (27.940) 0.190 max. (4.826) 0.010 (0.254) +0.002 ?0.001 seating plane 0.025 ( 0.635 )
(unless otherwise indicated): 2 place decimal (.xx) 0.010 (0.254) 3 place decimal (.xxx) 0.005 (0.127)
kovar alloy 50 microinches (minimum) gold plating over 100 microinches (nominal) nickel plating 24-pin ddip datel, inc. 11 cabot boulevard, mansfield, ma 02048-1151 tel: (508) 339-3000 (800) 233-2765 fax: (508) 339-6356 internet: www.datel.com email: sales@datel.com datel (uk) ltd. tadley, england tel: (01256)-880444 datel s.a.r.l. montigny le bretonneux, france tel: 01-34-60-01-01 datel gmbh mnchen, germany tel: 89-544334-0 datel kk tokyo, japan tel: 3-3779-1031, osaka tel: 6-6354-2025 datel makes no representation that the use of its products in the circuits described herein, or the use of other technical info rmation contained herein, will not infringe upon existing or future patent rights. the descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. specification s are subject to change without notice. the datel logo is a registered datel, inc. trademark. ds-0088a 1996
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