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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
PRODUCT OVERVIEW
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.
SIMPLIFIED SCHEMATIC
1k
1k 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
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MDA_SHM-4860.B01 Page 1 of 4
SHM-4860
Industry-Standard, High-Speed 0.01% Sample-Hold Amplifiers
ORDERING GUIDE SUMMARY Model Number
SHM-4860MC SHM-4860MM SHM-4860/883
INPUT/OUTPUT CONNECTIONS PIN FUNCTION 1 2 3 4 5 6 7 8 9 10 11 12 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
Operating Temperature Range
0 to +70C -55 to +125C -55 to +125C
MECHANICAL SPECIFICATIONS
1.31 MAX. (33.27)
24-PIN DDIP
(unless otherwise indicated): 2 place decimal (.XX) 0.010 (0.254) 3 place decimal (.XXX) 0.005 (0.127) 0.80 MAX. (20.32) Kovar alloy 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)
Dimensions in inches (mm)
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MDA_SHM-4860.B01 Page 2 of 4
SHM-4860
Industry-Standard, High-Speed 0.01% Sample-Hold Amplifiers
ABSOLUTE MAXIMUM RATINGS
I15V 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 Aperture Delay Time Aperture Uncertainty (Jitter) Output Slew Rate Output Slew Rate Small Signal Bandwidth (-3dB) Droop: +25C +70C
DYNAMIC CHARACTERISTICS , Continued
-- -- -- -- -- -- -- -- -- 6 50 300 300 16 0.5 15 1.2 74 -- -- -- -- -- 5 -- -- -- ns ps V/s V/s MHz V/s V/s mV/s dB
Functional Specifications
(Typical at +25C with 15V and +5V supplies unless otherwise noted.)
+125C Feedthrough Attenuation Overload Recovery Time MAX. -- -- 40 -- -- UNITS V k mA k pF Voltage Range: 15V Supplies +5V Supply Power Supply Rejection Ratio Quiescent Current Drain +15V Supply +2.0 0 -- -- +5.0 +0.8 V V -15V Supply +5V Supply Power Consumption -- -- -- -- +40 -1.6 A mA Positive Negative
ANALOG INPUT/OUTPUT
MIN. 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" 10.25 -- -- TYP. 11.25 1 -- 0.1 250
-- --
200 700
-- --
ns ns
POWER REQUIREMENTS
-- -- -- 3 5 0.5 -- -- -- % % mV/V
-- -- -- --
+21 -22 +17 730
+25 -25 +25 875
mA mA mA mW
PHYSICAL/ENVIRONMENTAL
Operating Temperature Ranges SHM-4860MC 0 to +70C (ambient) -55 to +125C (case) -65 to +150C 24-pin ceramic DDIP
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 -- -- -- -- -- -- -- -- -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
SHM-4860MM, 883 Storage Temperature Range Package Type
Output
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. 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.
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 -- -- -- 60 40 180 100 -- -- ns ns mV p-p -- -- -- -- 160 100 90 75 200 170 -- -- ns ns ns ns
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MDA_SHM-4860.B01 Page 3 of 4
SHM-4860
Industry-Standard, High-Speed 0.01% Sample-Hold Amplifiers
USA: Canada: UK: France: Germany: Japan: China: Singapore:
Mansfield (MA), Tel: (508) 339-3000, email: sales@murata-ps.com Toronto, Tel: (866) 740-1232, email: toronto@murata-ps.com Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com Munchen, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com ISO 9001 REGISTERED
10/01/08
Murata Power Solutions, Inc. 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. (c) 2008 Murata Power Solutions, Inc.
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