® ® 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%. INPUT/OUTPUT CONNECTIONS PIN Sample-to-hold settling time, to ±0.01% accuracy, is 100 nanoseconds maximum with an aperture uncertainty of ±25 picoseconds. 1 2 3 4 5 6 7 8 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. –15V SUPPLY 5 +15V SUPPLY 7 FUNCTION +5V SUPPLY S/H CONTROL ANALOG INPUT ANALOG RETURN –15V SUPPLY ANALOG OUTPUT +15V SUPPLY POWER GROUND +5V SUPPLY 1 2kΩ 100pF 2kΩ ANALOG INPUT 3 6 ANALOG OUTPUT SWITCH DRIVER S/H CONTROL 2 8 POWER GROUND 4 ANALOG RETURN Figure 1. Functional Block Diagram ® ® 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 FUNCTIONAL SPECIFICATIONS (Apply over the operating temperature range with ±15V and +5V supplies unless otherwise specified.) 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 ANALOG INPUT/OUTPUT MIN. TYP. MAX. UNITS Input/Output Voltage Range ±15V Nominal Supplies ±12V Nominal Supplies Input Impedance Output Current Output Impedance Capacitive Load ±10 ±7 1.75 — — 100 ±11.5 ±8.5 2 — 0.1 250 — — — ±40 — — Volts Volts kΩ mA Ω pF Operating Temp. Range, Case SHM-49MC SHM-49MM Storage Temperature Range Thermal Impedance θjc θca Package Type +2.0 0 — — +5.0 +0.8 Volts Volts Footnotes: TYP. MAX. UNITS +11.5 –11.5 +4.75 — +15.0 –15.0 +5.0 ±0.5 +15.5 –15.5 +5.25 ±1 Volts Volts Volts mV/V — — — — +12 –12 +1 365 +13.5 –13.5 +1.5 415 mA mA mA mW PHYSICAL/ENVIRONMENTAL DIGITAL INPUT Input Logic Levels Logic 1 Logic 0 Loading Logic 1 Logic 0 — — — — +5 –5 µA µA TRANSFER CHARACTERISTICS À Á 0 to +70 °C –55 to +125 °C –65 to +150 °C 15°C/W 35°C/W 8-pin ceramic DIP Full Scale (FS) = 10V. Full Scale Range (FSR) = 20V. Sample-to-hold offset error (pedestal) is constant regardless of input/output level. ORDERING INFORMATION Gain Gain Error, +25°C Linearity Error À Sample Mode Offset , +25°C Sample-to-Hold Offset (Pedestal), +25°C Á Gain Drift Sample Mode Offset Drift À — — — — –1 ±0.05 ±0.005 ±2 — ±0.5 ±0.01 ±7 V/V % %FS mV — — — ±2.5 ±0.5 ±3 ±25 ±15 ±15 mV ppm/°C ppm of FSR/°C Sample-to-Hold Off. (Pedestal) Drift — ±5 ±20 ppm of FSR/°C 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 MIN. — — 160 — 200 265 ns ns — — — — 100 — 90 75 150 215 — — ns ns ns ns — — — — — ±200 10 60 40 100 10 ±25 ±300 16 100 80 — 15 ±50 — — ns ns mVp-p ns ps V/µs MHz — — — 69 ±0.5 ±15 ±1.2 74 ±15 ±30 ±2.4 — µV/µs µV/µs mV/µs dB MODEL OPERATING TEMP. RANGE SHM-49MC 0 to +70°C SHM-49MM –55 to +125°C For availability of high-reliability versions of the SHM-49, contact DATEL. 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 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. 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. ® ® SHM-49 ANALOG INPUT (GAIN ADJUST) R1 10kΩ, 0.1% 10kΩ, 0.1% 50Ω TO SHM-49 PIN 3 5.11kΩ HIGH-SPEED FAST-SETTLING AMPLIFIER 3MΩ –15V +15V R2 (OFFSET ADJUST) Figure 2. Offset and Gain Adjustments MECHANICAL DIMENSIONS INCHES (mm) 0.405 MAX. (10.287) Dimension Tolerances (unless otherwise indicated): 2 place decimal (.XX) ±0.001 (±0.25) 3 place decimal (.XXX) ±0.005 (±0.127) 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) 0.200 MAX. (5.08) 0.054 (1.372) 0.010 ±0.002 (0.254) 0.018 ±0.002 (0.457) 0.300 ±0.015 (7.620) 0.100 TYP. (2.540) 0.300 ±0.005 (7.620) INNOVATION and EXCELLENCE 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: [email protected] ISO 9001 R E G I S T E R E D DS-0239C 06/2000 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.