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SHM-49
Miniature, High-Speed 0.01% Sample-Hold Amplifiers
INNOVATION and EXCELLENCE
FEATURES
* * * * * * * Small 8-pin DIP package 200ns max. acquisition time to 0.01% 100ns max. sample-to-hold settling time to 0.01% 16MHz small signal bandwidth 74dB feedthrough attenuation 25 picoseconds aperture uncertainty 415mW maximum power dissipation
GENERAL DESCRIPTION
DATEL's SHM-49 is a high-speed, highly accurate sample/hold designed for precision, high-speed analog signal processing applications. The SHM-49 features excellent dynamic specifications including a maximum acquisition time of only 200 nanoseconds for a 10V step to 0.01%. Sample-to-hold settling time, to 0.01% accuracy, is 100 nanoseconds maximum with an aperture uncertainty of 25 picoseconds. The SHM-49 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 FUNCTION +5V SUPPLY S/H CONTROL ANALOG INPUT ANALOG RETURN -15V SUPPLY ANALOG OUTPUT +15V SUPPLY POWER GROUND
-15V SUPPLY 5
+15V SUPPLY 7
+5V SUPPLY 1
2k 100pF 2k ANALOG INPUT 3 6 ANALOG OUTPUT
S/H CONTROL 2
SWITCH DRIVER
8 POWER GROUND
4 ANALOG RETURN
Figure 1. Functional Block Diagram
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SHM-49
ABSOLUTE MAXIMUM RATINGS
15V Supply Voltage +5V Supply Voltage Analog Input Digital Input Output Current 18V -0.5V to +7V 18V -0.5V to +5.5V 65 mA POWER REQUIREMENTS Voltage Range +15V Supply -15V Supply +5V Supply Power Supply Rejection Ratio Quiescent Current Drain +15V Supply -15V Supply +5V Supply Power Consumption PHYSICAL/ENVIRONMENTAL 10 7 1.75 -- -- 100 11.5 8.5 2 -- 0.1 250 -- -- -- 40 -- -- Volts Volts k mA pF Operating Temp. Range, Case SHM-49MC SHM-49MM Storage Temperature Range Thermal Impedance jc ca Package Type Footnotes: Full Scale (FS) = 10V. Full Scale Range (FSR) = 20V. Sample-to-hold offset error (pedestal) is constant regardless of input/output level.
A
MIN. +11.5 -11.5 +4.75 -- -- -- -- --
TYP. +15.0 -15.0 +5.0 0.5 +12 -12 +1 365
MAX. +15.5 -15.5 +5.25 1 +13.5 -13.5 +1.5 415
UNITS Volts Volts Volts mV/V mA mA mA mW
FUNCTIONAL SPECIFICATIONS
(Apply over the operating temperature range with 15V and +5V supplies unless otherwise specified.) ANALOG INPUT/OUTPUT Input/Output Voltage Range 15V Nominal Supplies 12V Nominal Supplies Input Impedance Output Current Output Impedance Capacitive Load DIGITAL INPUT Input Logic Levels Logic 1 Logic 0 Loading Logic 1 Logic 0 TRANSFER CHARACTERISTICS Gain Gain Error, +25C Linearity Error Sample Mode Offset , +25C Sample-to-Hold Offset (Pedestal), +25C Gain Drift Sample Mode Offset Drift Sample-to-Hold Off. (Pedestal) Drift DYNAMIC CHARACTERISTICS Acquisition Time 10V to 0.01%FS (1 mV) +25 C -55 to +125 C 10V to 0.1%FS (10 mV) +25 C -55 to +125 C 10V to 1%FS (100 mV) 1V to 1%FS (10 mV) Sample-to-Hold Settling Time 10V to 0.01%FS (1 mV) 10V to 0.1%FS (10 mV) Sample-to-Hold Transient Aperture Delay Time Aperture Uncertainty (Jitter) Output Slew Rate Small Signal BW (-3dB) Output Droop +25 C 0 to +70 C -55 to +125 C Feedthrough Rejection
A A A
MIN.
TYP.
MAX.
UNITS
0 to +70 C -55 to +125 C -65 to +150 C 15C/W 35C/W 8-pin ceramic DIP
+2.0 0 -- --
-- -- -- --
+5.0 +0.8 +5 -5
Volts Volts A A
ORDERING INFORMATION
-- -- -- -- -- -- -- -1 0.05 0.005 2 2.5 0.5 3 -- 0.5 0.01 7 25 15 15 V/V % %FS mV mV ppm/C ppm of FSR/C ppm of FSR/C MODEL SHM-49MC SHM-49MM OPERATING TEMP. RANGE 0 to +70C -55 to +125C
--
5
20
TECHNICAL NOTES
1. All ground pins 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 ground pins directly to it. Take care to ensure that no ground potentials can exist between ground pins. 2. External 0.1 F to 1 F tantalum bypass capacitors are required in critical applications. 3. A logic 1 on S/H puts the unit in the sample mode. A logic 0 puts the unit in hold mode. 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. Greater load capacitances will affect both acquisition and settling time. 5. Gain and offset adjusting can be accomplished using the external circuitry shown in Figure 2. Adjust offset with a 0V input. Adjust gain with a FS input. Adjust so that the output in the hold mode matches the input.
-- -- -- -- -- -- -- -- -- -- -- 200 10 -- -- -- 69
160 -- 100 -- 90 75 60 40 100 10 25 300 16 0.5 15 1.2 74
200 265 150 215 -- -- 100 80 -- 15 50 -- -- 15 30 2.4 --
ns ns ns ns ns ns ns ns mVp-p ns ps V/s MHz V/s V/s mV/s dB
A
For availability of high-reliability versions of the SHM-49, contact DATEL.
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SHM-49
ANALOG INPUT
(GAIN ADJUST) R1 10k, 0.1% 50 10k, 0.1%
TO SHM-49 PIN 3 HIGH-SPEED FAST-SETTLING AMPLIFIER
5.11k
3M
-15V
+15V
R2 (OFFSET ADJUST)
Figure 2. Offset and Gain Adjustments
MECHANICAL DIMENSIONS INCHES (mm)
0.405 MAX. (10.287) PIN 1 INDENTIFIER SHM-49 0.300 MAX. (7.62) 0.140 MAX. (3.556) 0.09 (2.23) 0.035 0.010 (0.89)
Dimension Tolerances (unless otherwise indicated): 2 place decimal (.XX) 0.001 (0.25) 3 place decimal (.XXX) 0.005 (0.127)
0.200 MAX. (5.08) 0.054 (1.372) 0.018 0.002 (0.457) 0.100 TYP. (2.540) 0.300 0.005 (7.620)
0.010 0.002 (0.254)
0.300 0.015 (7.620)
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INNOVATION and EXCELLENCE
ISO 9001
REGISTERED
DS-0239C
06/2000
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 Internet: www.datel.com E-mail: 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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