®
®
S HM-1 2
Ultra-Fast, 12-Bit Linear
INN OVATION and E XCELLENCE
Monolithic Sample-Hold Amplifiers
FEATURES
• Fast acquisition time:
10ns to ±0.1%
15ns to ±0.024%
20ns to ±0.012%
• ±0.006% Nonlinearity
• 65µVrms output noise
• 120MHz small signal bandwidth
• 55MHz full power bandwidth
• –80dB feedthrough
• 1ps Aperture jitter
• 250mW power dissipation
• Low cost
INPUT/OUTPUT CONNECTIONS
(CLCC and SOIC-20 Packages)
GENERAL DESCRIPTION
PIN FUNCTION
PIN
FUNCTION
The SHM-12 is an extremely high-speed and accurate
monolithic sample-and-hold amplifier designed for fast data
acquisition applications. The SHM-12 is accurate (±1LSB at 12
bits over the full military temperature range) and is very fast
(10ns and 15ns acquisition times to accuracies of 10 and 12-
bits, respectively). With this high performance and a full power
bandwidth of 55MHz, the SHM-12 is an ideal device for driving
flash and high-resolution subranging A/D converters.
20
19
18
17
16
15
14
13
12
11
+5V SUPPLY
SAMPLE/HOLD
SAMPLE/HOLD
+5V SUPPLY
GROUND
EXT. CAPACITOR
GROUND
+5V SUPPLY
+5V SUPPLY
ANALOG OUTPUT
1
2
3
4
5
6
7
8
9
–5V SUPPLY
–5V SUPPLY
NOT CONNECTED
ANALOG INPUT
–5V SUPPLY
DO NOT CONNECT
–5V SUPPLY
DO NOT CONNECT
–5V SUPPLY
–5V SUPPLY
10
A careful design optimizes the device for accuracy and speed
over the full military temperature range. The droop rate is a low
±0.5mV/µs. The 30mA output current and guaranteed
specifications for a 100Ω load provide high drive capability.
Operating from ±5V supplies, the SHM-12 consumes only
250mW of power.
The SHM-12 is built using a fast complementary bipolar
process. The device is available in both military and industrial
temperature ranges. The SHM-12 is packaged in a 20-pin
plastic SOIC or ceramic LCC.
EXTERNAL HOLD
–5V SUPPLY
CAPACITOR
+5V SUPPLY
12, 13, 17, 20
1, 2, 5, 7, 9, 10
15
4
ANALOG INPUT
+1
11
3
ANALOG
OUTPUT
+1
CH
15pF
NOT CONNECTED
18
19
SWITCH
DRIVE
SAMPLE/HOLD
SAMPLE/HOLD
6, 8
DO NOT
CONNECT
14, 16
GROUND
Figure 1. SHM-12 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