SHM-4860 ® ® Industry-Standard, High-Speed ±0.01% Sample-Hold Amplifiers INNOVATION and EXCELLENCE 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 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 PIN FUNCTION OUTPUT N.C. N.C. N.C. N.C. N.C. N.C. N.C. +5V SUPPLY GROUND HOLD COMMAND HOLD COMMAND 24 23 22 21 20 19 18 17 16 15 14 13 +15V SUPPLY GROUND –15V SUPPLY GROUND N.C. N.C. N.C. N.C. N.C. GROUND N.C. INPUT 1k CH 1k INPUT 13 1 OUTPUT + 9 +5V SUPPLY 24 +15V SUPPLY HOLD COMMAND 11 SWITCH DRIVER HOLD COMMAND 12 10 15 22 –15V SUPPLY 23 21 SYSTEM GROUND 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 ® ® SHM-4860 ABSOLUTE MAXIMUM RATINGS ±15V Supply Voltages, Pins 24, 22 +5V Supply Voltage, Pin 9 Analog Input, Pin 13 ➀ Digital Inputs, Pins 11, 12 Output Current ➁ ±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 FUNCTIONAL SPECIFICATIONS 0 to +70°C (ambient) –55 to +125°C (case) –65 to +150°C 24-pin ceramic DDIP (Typical at +25°C with ±15V and +5V supplies unless otherwise noted.) Footnotes: ANALOG INPUT/OUTPUT MIN. TYP. MAX. UNITS Input/Output Voltage Range ➀ Input Impedance Output Current ➁ Output Impedance Maximum Capacitive Load ±10.25 — — ±11.25 1 — 0.1 250 — — ±40 — — V kΩ mA kΩ pF — DIGITAL INPUT Input Logic Level Logic "1" Logic "0" Loading Logic "1" Logic "0" +2.0 0 — — +5.0 +0.8 V V — — — — +40 –1.6 µA mA — — — — –1 ±0.05 ±0.005 ±0.5 — ±0.1 ±0.01 ±5 V/V % %FS mV — — — — ±2.5 ±0.5 ±3 ±4 ±20 ±5 ±15 — mV ppm/°C ➄ ➄ — — — — 160 100 90 75 200 170 — — ns ns ns ns — — — — — — — — — — — 60 40 180 6 ±50 ±300 16 ±0.5 ±15 ±1.2 74 100 — — — — — — ±5 — — — ns ns mV p-p ns ps µV/µs MHz µV/µs µV/µs mV/µs dB — — 200 700 — — ns ns — — — ±3 ±5 ±0.5 — — — % % mV/V — — — — +21 –22 +17 730 +25 –25 +25 875 mA mA mA mW POWER REQUIREMENTS Voltage Range: ±15V Supplies +5V Supply Power Supply Rejection Ratio Quiescent Current Drain +15V Supply –15V Supply +5V Supply Power Consumption ➂ Full Scale (FS) = 10V. Full Scale Range (FSR) = 20V. ➄ Units are ppm of FSR/°C. TECHNICAL NOTES 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: +25°C +70°C +125°C Feedthrough Attenuation Overload Recovery Time Positive Negative ➁ 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. ➃ Sample-to-Hold Offset Error (Pedestal) is constant regardless of input/output level. TRANSFER CHARACTERISTICS Gain Gain Accuracy Gain Linearity Error ➂ Sample-Mode Offset Voltage Sample-to-Hold Offset Error ➃ (Pedestal) Gain Tempco (Drift) Sample-Mode Offset Drift Sample-to-Hold Offset Drift ➀ Input signal should not exceed the supply voltage. 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 0.01µF ceramic capacitors, additional external 0.1µF to 1µF 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 500Ω, although values as low as 250Ω may be used. Acquisition and sample-to-hold settling times are relatively unaffected by resistive loads down to 250Ω and capacitive loads up to 50pF. However, higher capacitances will affect both acquisition and settling time. Sample-and-Hold Amplifiers ® ® SHM-4860 MECHANICAL DIMENSIONS INCHES (mm) 1.31 MAX. (33.27) 24-PIN DDIP 24 Dimension Tolerances (unless otherwise indicated): 2 place decimal (.XX) ±0.010 (±0.254) 3 place decimal (.XXX) ±0.005 (±0.127) 13 Lead Material: Kovar alloy 0.80 MAX. (20.32) 1 Lead Finish: 50 microinches (minimum) gold plating over 100 microinches (nominal) nickel plating 12 0.100 TYP. (2.540) 1.100 (27.940) 0.235 MAX. (5.969) 0.200 MAX. (5.080) +0.002 0.010 –0.001 (0.254) 0.190 MAX. (4.826) 0.100 (2.540) 0.040 (1.016) 0.018 ±0.002 (0.457) 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 +70°C –55 to +125°C –55 to +125°C 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: [email protected] 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 München, 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.