® ® SHM-14 Ultra-Fast, 14-Bit Linear Monolithic Sample-Hold Amplifiers IN N O VA T IO N a n d E X C E L L E N C E FEATURES • Fast acquisition time: 10ns to ±0.1% 20ns to ±0.024% 25ns to ±0.012% • ±0.0012% Nonlinearity • 65µV rms output noise • 250MHz small signal bandwidth • 70MHz full power bandwidth • –80dB feedthrough • 1ps Aperture jitter • 250mW power dissipation • Low cost INPUT/OUTPUT CONNECTIONS — SOIC PIN 1 2 3 4 5 6 7 8 GENERAL DESCRIPTION The SHM-14 is an extremely high-speed and accurate monolithic sample-and-hold amplifier designed for fast data acquisition applications. The SHM-14 is accurate (±0.5 LSB to 14-bits over the full military temperature range) and is very fast (10ns and 20ns acquisition times to accuracies of 10 and 12 bits respectively). With this high performance and a full power bandwidth of 70MHz, the SHM-14 is an ideal device for driving flash and high-resolution subranging A/D converters. A careful design optimizes the device for accuracy and speed over the full military temperature range. The droop rate is a low ±2mV/µs and can be further reduced by adding an optional external hold capacitor. The 30mA output current and guaranteed specifications for a 100Ω load provide high drive capability. Operating from ± 5V supplies, the SHM-14 consumes only 250mW of power. –5V SUPPLY DO NOT CONNECT ANALOG INPUT DO NOT CONNECT –5V SUPPLY DO NOT CONNECT DO NOT CONNECT –5V SUPPLY PIN FUNCTION 1 2 3 4 5 6 7 8 9 10 13 SAMPLE/HOLD SAMPLE/HOLD +5V SUPPLY EXT. CAPACITOR GROUND +5V SUPPLY +5V SUPPLY ANALOG OUTPUT 20 19 18 17 16 15 14 13 12 11 FUNCTION NOT CONNECTED SAMPLE/HOLD SAMPLE/HOLD +5V SUPPLY NOT CONNECTED EXT. CAPACITOR GROUND +5V SUPPLY +5V SUPPLY ANALOG OUTPUT 10, 11, 14 3 +1 CH 15pF SAMPLE/HOLD FUNCTION +5V SUPPLY +1 SAMPLE/HOLD 16 15 14 13 12 11 10 9 PIN NOT CONNECTED –5V SUPPLY NOT CONNECTED ANALOG INPUT NOT CONNECTED DO NOT CONNECT –5V SUPPLY DO NOT CONNECT DO NOT CONNECT –5V SUPPLY EXTERNAL HOLD CAPACITOR 1, 5, 8 ANALOG INPUT PIN INPUT/OUTPUT CONNECTIONS — CLCC The SHM-14 is built using a fast complementary bipolar process. The device is available in both military and industrial temperature ranges. The SHM-14 is packaged in a 16-pin plastic SOIC or in a 20-pin ceramic LCC. –5V SUPPLY FUNCTION 15 9 ANALOG OUTPUT SWITCH DRIVE 16 2, 4, 6, 7 12 Note: SOIC Package Pinouts Shown DO NOT CONNECT GROUND Figure 1. SHM-14 Functional Block Diagram DATEL, Inc., 11 Cabot Boulevard, Mansfield, MA 02048-1151 (U.S.A.) • Tel: (508) 339-3000 Fax: (508) 339-6356 • For immediate assistance (800) 233-2765 ® ® SHM-14 ABSOLUTE MAXIMUM RATINGS PARAMETERS PERFORMANCE (Cont.) LIMITS UNITS +5V Supply –5V Supply Analog Input 0 to +6 0 to –6 +5V Supply –1 –5V Supply +1 Continuous Output Current ±50 Digital Inputs <Supply Voltages Junction Temperature +175 Lead Temperature (10 seconds) +300 Output shorted to any supply will cause permanent damage. Acquisition Time (±0.1%, ±2V) –40 to +85°C –55 to +125°C Hold Mode Settling (±0.012%) –40 to +85°C –55 to +125°C Hold Mode Settling (±0.024%) –40 to +85°C –55 to +125°C Hold Mode Settling (±0.05%) –40 to +85°C –55 to +125°C Hold Mode Settling (±0.1%) –40 to +85°C –55 to +125°C Slew Rate Full Power Bandwidth (±1V) Small Signal Bandwidth Output Noise, Hold Mode Feedthrough (2V Step) Droop Rate +25°C –40 to +85°C –55 to +125°C Volts Volts Volts Volts mA Volts °C °C FUNCTIONAL SPECIFICATIONS (Apply over the operating temperature range using a 100Ω resistive load, 10pF capacitive load, ECL digital input levels, and ±5V nominal supplies, unless specified.) INPUTS MIN. TYP. MAX. UNITS Input Voltage Range Input Impedance Digitals Inputs (Balanced ECL) Logic Levels Logic 1 Logic 0 Logic Loading Logic 1 Logic 0 –2.5 0.3 — 1 +2.5 — Volts MΩ –1.5 –2.5 — — +1.8 +0.8 Volts Volts — — +10 –30 +50 –150 µA µA –2.5 ± 30 — — — — 0.3 — +2.5 — 1 50 Volts mA Ω pF PERFORMANCE Nonlinearity (±1V) +25°C –40 to +85°C –55 to +125°C Sample Mode Offset +25°C –40 to +85°C –55 to +125°C Pedestal +25°C –40 to +85°C –55 to +125°C Gain, +25°C Gain Drift (±1V) –40 to +85°C –55 to +125°C Aperture Delay –40 to +85°C –55 to +125°C Aperture Jitter –40 to +85°C –55 to +125°C Harmonic Distortion (±1V) dc to 1MHz dc to 10MHz +25°C –40 to +85°C –55 to +125°C Acquisition Time (±0.012%, ±2V) –40 to +85°C –55 to +125°C Acquisition Time (±0.024%, ±2V) –40 to +85°C –55 to +125°C Acquisition Time (±0.05%, ±2V) –40 to +85°C –55 to +125°C TYP. MAX. UNITS — — 10 10 16 19 ns ns — — 12 15 — — ns ns — — 7 7 18 18 ns ns — — 6 6 16 16 ns ns — — ±300 45 100 — — 5 5 ±430 70 250 65 –80 12 12 — — — — — ns ns V/µs MHz MHz µVrms dB — — — ±2 ±5 ±10 ±6 ±15 ±30 mV/µs mV/µs mV/µs +4.5 –5.5 +5 –5 +5.5 –4.5 Volts Volts +17 –17 170 40 +25 –25 250 60 +30 –30 300 — mA mA mW dB –40 –55 –65 — — — +85 +125 +150 °C °C °C POWER SUPPLY REQUIREMENTS Power Supply Range +5V Supply –5V Supply Power Supply Current +5V Supply –5V Supply Power Dissipation Power Supply Rejection Ratio OUTPUTS Output Voltage Range Output Current • Output Impedance (dc) Stable Capacitive Load MIN. ENVIRONMENTAL — — — ±0.0012 — — ±0.002 — ±0.003 Operating Temp. Range, Case SHM-14S, SHM-14L SHM-14LM Storage Temperature Range Package Type SHM-14S SHM-14L, SHM-14LM % % % — — — ±12 — — — ±20 ±30 mV mV mV — — — +0.98 ±3 — — +0.995 — ±20 ±20 — mV mV mV V/V — — — — ±20 ±30 ppm/°C ppm/°C — — 2 2 — — ns ns — — 1 1 — — ps rms ps rms — –72 — dB — — — –58 — — — –50 –48 dB dB dB — — 25 35 — — ns ns — — 20 25 35 40 ns ns — — 19 20 30 35 ns ns 16-Pin plastic SOIC 20-Pin ceramic LCC Footnotes: • Short circuit protection at ±50mA. TECHNICAL NOTES The SHM-14 employs an open loop architecture in order to achieve its superior high-speed characteristics. The first stage buffer amplifier, which charges the hold capacitor, incorporates the sample-and-hold switch into its design. This technique allows for a fast acquisition time which is not limited by slew current like the traditional Schottky diode bridge switch. The output amplifier uses a closed loop voltage feedback design which provides a low (0.3Ω, typical) output impedance. Gain and linearity are not affected by heavy loads. The design has been optimized to achieve the high accuracy associated with fast transient responses over the full military temperature range. During the track-to-hold transient, the integral nonlinearity is not affected and the pedestal remains constant over the full ±2.5V input range. An external hold capacitor can be added to the 15pF internal hold capacitor to obtain a lower droop rate (the droop rate is proportional to the inverse of the total hold capacitor value) without increasing transient response times by more than few ns. Settling and acquisition times are typically increased by 5ns and 10ns respectively for 47pF and 100pF external hold capacitors. The external hold capacitor should not exceed 100pF. 2 ® ® SHM-14 GROUNDING AND LAYOUT Locate the bypass capacitors as close to the unit as possible. Obtaining fully specified performance from the SHM-14 requires careful attention to pc-board layout and power supply decoupling. For best performance, controlled impedance transmission line techniques, such as microstrip, should be used. Mount all components as close to the required pins as possible. It is strongly recommended that the SHM-14 not be socket-mounted. For optimal performance, tie all grounds directly to a large analog ground plane beneath and around the package. Bypass all power supplies to ground with 10µF tantalum capacitors in parallel with 0.1µF ceramic capacitors. SHM-14 50 Ω 50Ω SAMPLE / HOLD 16 (19) SAMPLE 0.1µF 1 (2) –5V SUPPLY SAMPLE / HOLD 15 (18) HOLD 0.1µF 14 (17) +5V SUPPLY 3 (4) ANALOG INPUT INPUT EXTERNAL HOLD CAPACITOR 50Ω 5 (7) – 5V SUPPLY GROUND C HOLD 13 (15) Refer to Table 1 for optional HOLD capacitor values. 12 (14) 0.1µF 0.1µF 11 (13) +5V SUPPLY +5V SUPPLY 10 (12) 10µF 9 (11) 8 (10) 0.1µF ANALOG OUTPUT ANALOG OUTPUT + – 5V SUPPLY 10µF R Load 100Ω NOTES: 0.1µF – 5V 1. Pin numbers in ( ) are for CLCC package. 2. For SOIC package: Pins 2, 4, 6, 7 DO NOT CONNECT 3. For CLCC package: Pins 1, 3, 5, 16, 20 NOT CONNECTED Pins 6, 8, 9 DO NOT CONNECT + 0.1µF +5V Figure 2. SHM-14 Simplified Connection Diagram -0.8 V SAMPLE HOLD HOLD -1.8 V -0.8 V SAMPLE SAMPLE HOLD -1.8 V +1 V Acquisition Time to ±0.024% ANALOG INPUT -1 V 20ns typ. +1 V ANALOG OUTPUT -1 V 7ns typ. 7ns typ. Feedthrough -80dB Track-to-hold Settling to ±0.024% 20ns typ. Figure 3. SHM-14 Control and Timing 3 ® ® SHM-14 Evaluation Board for CLCC-20 Version 0.1µF –5V SUPPLY 16, 17, 18, 19 130Ω SAMPLE SHM-14 2 –5V SUPPLY 19 SAMPLE / HOLD 0.1µF SAMPLE / HOLD ANALOG INPUT 20 4 51Ω +5V SUPPLY INPUT EXTERNAL HOLD CAPACITOR 7 GROUND –5V SUPPLY 0.1µF +5V SUPPLY +5V SUPPLY –5V SUPPLY 11, 12, 15 10 OUTPUT –5V SUPPLY 82Ω 130Ω 0.1µF 82Ω 18 17, 20 15 14, 16 Refer to Table 1. for optional HOLD capacitor values. 13 +5V SUPPLY 12 0.1µF 11 GROUND 1, 2, 3, 4 GROUND PLANE Figure 4. SHM-14 Evaluation Board Schematic Table 1. Optional External HOLD Capacitor SHM-14L, -14S SHM-14LM Operating Temperature Range –40 to +85°C –55 to +125°C 4 HOLD 13 CHOLD 0.1µF Model 14 Type of HOLD Capacitor (Ceramic, ≤100pF, ±10%) Type I or II, NPO or X7R Type I or NPO 6, 7, 8, 9, 10 ANALOG OUTPUT 5 ® ® SHM-14 INCHES (mm) 0.43 (11) PLASTIC STANDOFF 0.13 (3.3) 0.100 (2.54) 20 19 C2 R1 18 C3 17 C5 C1 15 C7 C4 R4 14 R3 13 12 1 1 20 2 2 19 3 3 18 4 4 17 5 16 6 15 5 C6 R6 CEXT 16 R5 6 7 8 9 0.018 (0.45) 10 11 (TOP VIEW) 0.85 (21.59) 7 14 8 13 9 12 10 11 (BOTTOM VIEW) 0.95 (24.13) Figure 5. SHM-14 Evaluation Board Dimensions SHM-14 Evaluation Board Connections PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 FUNCTION GROUND GROUND GROUND GROUND ANALOG OUTPUT +5V SUPPLY +5V SUPPLY +5V SUPPLY +5V SUPPLY +5V SUPPLY –5V SUPPLY –5V SUPPLY HOLD SAMPLE –5V SUPPLY –5V SUPPLY –5V SUPPLY –5V SUPPLY –5V SUPPLY ANALOG INPUT 5 1.10 (27.94) ® ® SHM-14 MECHANICAL DIMENSIONS INCHES (MM) SOIC-16 Package A J 16 K 9 C SYMBOL A B C D E F G H J K L B L H 8 1 E D G INCHES MIN. MAX. 0.402 0.412 0.400 0.410 0.292 0.299 0.014 0.019 0.0500 BSC 0.0039 0.0112 0° 8° 0.020 0.040 0.097 0.104 0.010 0.020 0.0091 0.0125 MILLIMETERS MIN. MAX. 10.21 10.46 10.16 10.41 7.40 7.60 0.35 0.48 1.27 BSC 0.10 0.30 0° 8° 0.51 1.02 2.46 2.64 0.25 0.51 0.23 0.32 F A CLCC-20 Package D B SYMBOL A B C D E F G H C E G PIN 1 INDEX (H x 45° 3 PLACES) H INCHES MIN. MAX. 0.064 0.100 0.045 0.055 0.075 REF 0.342 0.358 0.022 0.028 0.020 REF 0.050 BSC 0.040 REF MILLIMETERS MIN. MAX. 1.63 2.54 1.14 1.40 1.91 REF 8.69 9.09 0.56 0.71 0.51 1.27 BSC 1.02 F (F x 45°) BOTTOM VIEW ORDERING INFORMATION MODEL NUMBER PACKAGE TEMPERATURE RANGE SHM-14S SHM-14L SHM-14LM EVB-SHM14 SOIC-16 –40 to +85°C CLCC-20 –40 to +85°C CLCC-20 –55 to +125°C Evaluation Board (with SHM-14LM) Contact DATEL for availability of high reliability models. ® ® 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] Data Sheet Fax Back: (508) 261-2857 ISO 9001 R E G I S T E R E D DS-0311 10/96 DATEL (UK) LTD. Tadley, England Tel: (01256)-880444 DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: 1-34-60-01-01 DATEL GmbH München, Germany Tel: 89-544334-0 DATEL KK Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-354-2025 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.