SHM-4860
Industry-Standard, High-Speed
±0.01% Sample-Hold Amplifiers
FEATURES
•
•
•
•
•
•
200ns Maximum acquisition time
±0.01% Accuracy
100ns Maximum sample-hold settling time
74dB Feedthrough attenuation
±50ps Aperture uncertainty
Industry standard
®
®
INNOVATION and EXCELLENCE
GENERAL DESCRIPTION
DATEL’s SHM-4860 is a high-speed, highly accurate sample-
hold amplifier designed for precision, high-speed analog signal
processing applications. Manufactured using modern, high-
quality 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
OUTPUT
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
+5V SUPPLY
GROUND
HOLD COMMAND
HOLD COMMAND
PIN
24
23
22
21
20
19
18
17
16
15
14
13
FUNCTION
+15V SUPPLY
GROUND
–15V SUPPLY
GROUND
N.C.
N.C.
N.C.
N.C.
N.C.
GROUND
N.C.
INPUT
1kW
1kW
INPUT 13
C
H
1 OUTPUT
+
9 +5V SUPPLY
24 +15V SUPPLY
SWITCH
DRIVER
22 –15V SUPPLY
HOLD COMMAND 11
HOLD COMMAND 12
10
15
21
SYSTEM GROUND
23
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
Footnotes:
ANALOG INPUT/OUTPUT
Input/Output Voltage Range
➀
Input Impedance
Output Current
➁
Output Impedance
Maximum Capacitive Load
DIGITAL INPUT
Input Logic Level
Logic "1"
Logic "0"
Loading
Logic "1"
Logic "0"
+2.0
0
—
—
—
—
—
—
+5.0
+0.8
+40
–1.6
V
V
µA
mA
MIN.
±10.25
—
—
—
TYP.
±11.25
1
—
0.1
250
MAX.
—
—
±40
—
—
UNITS
V
kΩ
mA
kΩ
pF
➀
Input signal should not exceed the supply voltage.
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.
➂
Full Scale (FS) = 10V. Full Scale Range (FSR) = 20V.
➃
Sample-to-Hold Offset Error (Pedestal) is constant regardless of input/output
level.
➄
Units are ppm of FSR/°C.
0 to +70°C (ambient)
–55 to +125°C (case)
–65 to +150°C
24-pin ceramic DDIP
FUNCTIONAL SPECIFICATIONS
(Typical at +25°C with ±15V and +5V supplies unless otherwise noted.)
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
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
POWER REQUIREMENTS
Voltage Range:
±15V Supplies
+5V Supply
Power Supply Rejection Ratio
Quiescent Current Drain
+15V Supply
–15V Supply
+5V Supply
Power Consumption
—
—
—
—
—
—
—
±3
±5
±0.5
+21
–22
+17
730
—
—
—
+25
–25
+25
875
%
%
mV/V
mA
mA
mA
mW
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
160
100
90
75
60
40
180
6
±50
±300
16
±0.5
±15
±1.2
74
200
700
200
170
—
—
100
—
—
—
—
—
—
±5
—
—
—
—
—
ns
ns
ns
ns
ns
ns
mV p-p
ns
ps
µV/µs
MHz
µV/µs
µV/µs
mV/µs
dB
ns
ns
—
—
—
—
—
—
—
—
–1
±0.05
±0.005
±0.5
±2.5
±0.5
±3
±4
—
±0.1
±0.01
±5
±20
±5
±15
—
V/V
%
%FS
mV
mV
ppm/°C
➄
➄
TECHNICAL NOTES
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
Dimension Tolerances
(unless otherwise indicated):
2 place decimal (.XX) ±0.010 (±0.254)
3 place decimal (.XXX) ±0.005 (±0.127)
0.80 MAX.
(20.32)
Lead Material:
Kovar alloy
Lead Finish:
50 microinches (minimum) gold plating
over 100 microinches (nominal) nickel plating
24
13
1
12
0.100 TYP.
(2.540)
1.100
(27.940)
0.235 MAX.
(5.969)
0.200 MAX.
(5.080)
0.010
–0.001
(0.254)
0.190 MAX.
(4.826)
0.018 ±0.002
(0.457)
0.100
(2.540)
0.040
(1.016)
+0.002
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: 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 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.
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