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SHM-4860
Industry-Standard, High-Speed 0.01% Sample-Hold Amplifiers
FEATURES
* * * * * * 200ns Maximum acquisition time 0.01% Accuracy 100ns Maximum sample-hold settling time 74dB Feedthrough attenuation 50ps Aperture uncertainty Industry standard
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INNOVATION and EXCELLENCE
GENERAL DESCRIPTION
DATEL's SHM-4860 is a high-speed, highly accurate samplehold amplifier designed for precision, high-speed analog signal processing applications. Manufactured using modern, highquality 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.
INPUT/OUTPUT CONNECTIONS
PIN 1 2 3 4 5 6 7 8 9 10 11 12 FUNCTION OUTPUT N.C. N.C. N.C. N.C. N.C. N.C. N.C. +5V SUPPLY GROUND HOLD COMMAND HOLD COMMAND PIN 24 23 22 21 20 19 18 17 16 15 14 13 FUNCTION +15V SUPPLY GROUND -15V SUPPLY GROUND N.C. N.C. N.C. N.C. N.C. GROUND N.C. INPUT
1kW
1kW INPUT 13
CH 1 OUTPUT + 9 +5V SUPPLY 24 +15V SUPPLY SWITCH DRIVER 22 -15V SUPPLY
HOLD COMMAND 11 HOLD COMMAND 12
10
15
21 SYSTEM GROUND
23
INTERNAL SUPPLY BYPASS CAPACITORS
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
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SHM-4860
ABSOLUTE MAXIMUM RATINGS
15V Supply Voltages, Pins 24, 22 +5V Supply Voltage, Pin 9 Analog Input, Pin 13 Digital Inputs, Pins 11, 12 Output Current 18V -0.5V to +7V 18V -0.5V to +7V 65mA PHYSICAL/ENVIRONMENTAL Operating Temperature Ranges SHM-4860MC SHM-4860MM, 883 Storage Temperature Range Package Type Footnotes: ANALOG INPUT/OUTPUT Input/Output Voltage Range Input Impedance Output Current Output Impedance Maximum Capacitive Load DIGITAL INPUT Input Logic Level Logic "1" Logic "0" Loading Logic "1" Logic "0" +2.0 0 -- -- -- -- -- -- +5.0 +0.8 +40 -1.6 V V A mA MIN. 10.25 -- -- -- TYP. 11.25 1 -- 0.1 250 MAX. -- -- 40 -- -- UNITS V k mA k pF 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. 0 to +70C (ambient) -55 to +125C (case) -65 to +150C 24-pin ceramic DDIP
FUNCTIONAL SPECIFICATIONS
(Typical at +25C with 15V and +5V supplies unless otherwise noted.)
TRANSFER CHARACTERISTICS Gain Gain Accuracy Gain Linearity Error Sample-Mode Offset Voltage Sample-to-Hold Offset Error (Pedestal) Gain Tempco (Drift) Sample-Mode Offset Drift Sample-to-Hold Offset Drift DYNAMIC CHARACTERISTICS Acquisition Time 10V to 0.01%FS 10V to 0.1%FS 10V to 1%FS 1V to 1%FS Sample-to-Hold Settling Time 10V to 0.01%FS 10V to 0.1%FS Sample-to-Hold Transient Aperture Delay Time Aperture Uncertainty (Jitter) Output Slew Rate Small Signal Bandwidth (-3dB) Droop: +25C +70C +125C Feedthrough Attenuation Overload Recovery Time Positive Negative POWER REQUIREMENTS Voltage Range: 15V Supplies +5V Supply Power Supply Rejection Ratio Quiescent Current Drain +15V Supply -15V Supply +5V Supply Power Consumption -- -- -- -- -- -- -- 3 5 0.5 +21 -22 +17 730 -- -- -- +25 -25 +25 875 % % mV/V mA mA mA mW -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 160 100 90 75 60 40 180 6 50 300 16 0.5 15 1.2 74 200 700 200 170 -- -- 100 -- -- -- -- -- -- 5 -- -- -- -- -- ns ns ns ns ns ns mV p-p ns ps V/s MHz V/s V/s mV/s dB ns ns -- -- -- -- -- -- -- -- -1 0.05 0.005 0.5 2.5 0.5 3 4 -- 0.1 0.01 5 20 5 15 -- V/V % %FS mV mV ppm/C
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.
Sample-and-Hold Amplifiers
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SHM-4860
MECHANICAL DIMENSIONS INCHES (mm)
1.31 MAX. (33.27)
24-PIN DDIP
Dimension Tolerances (unless otherwise indicated): 2 place decimal (.XX) 0.010 (0.254) 3 place decimal (.XXX) 0.005 (0.127) 0.80 MAX. (20.32) Lead Material: Kovar alloy Lead Finish: 50 microinches (minimum) gold plating over 100 microinches (nominal) nickel plating
24
13
1
12
0.100 TYP. (2.540) 1.100 (27.940) 0.235 MAX. (5.969) 0.200 MAX. (5.080)
0.010 -0.001 (0.254) 0.190 MAX. (4.826) 0.018 0.002 (0.457) 0.100 (2.540) 0.040 (1.016)
+0.002
SEATING PLANE 0.025 (0.635)
0.600 0.010 (15.240)
0.100 (2.540)
ORDERING INFORMATION
MODEL NUMBER SHM-4860MC SHM-4860MM SHM-4860/883 OPERATING TEMP. RANGE 0 to +70C -55 to +125C -55 to +125C
Contact DATEL for 883 product specifications.
DS-0088A 1996
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 Munchen, 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 information 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. Specifications are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark.

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