EVB-SHM12 [ETC]
Ultra-Fast, 12-Bit Linear Monolithic Sample-Hold Amplifiers; 超高速， 12位线性单片采样保持放大器
| 型号： | EVB-SHM12 |
| 厂家： | 
ETC |
| 描述： | Ultra-Fast, 12-Bit Linear Monolithic Sample-Hold Amplifiers |
| 文件： | 总6页 (文件大小：155K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
®
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
®
®
S HM-1 2
ABSOLUTE MAXIMUM RATINGS
PERFORMANCE (Cont.)
MIN. TYP.
MAX. UNITS
PARAMETERS
LIMITS
UNITS
Acquisition Time (±0.1%, ±1V)
–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%)
+5V Supply
–5V Supply
Analog Input
0 to +6
0 to –6
+5V Supply –1
–5V Supply +1
±50
Volts
Volts
Volts
Volts
mA
Volts
°C
—
—
10
10
20
20
ns
ns
—
—
10
10
—
—
ns
ns
Continuous Output Current
Digital Inputs
JunctionTemperature
Lead Temperature (10 seconds)
<Supply Voltages
+175
—
—
7
7
18
18
ns
ns
+300
°C
Output shorted to any supply will cause permanent damage.
–40 to +85°C
—
—
6
6
15
15
ns
ns
–55 to +125°C
Hold Mode Settling (±0.1%)
–40 to +85°C
–55 to +125°C
FUNCTIONAL SPECIFICATIONS
(Apply over the operating temperature range using a 100Ω resistive load, 10pF
capacitive load, ECL digital input levels, a 47pF external hold capacitor, and ±5V
nominal supplies, unless otherwise specified.)
—
—
±220
35
50
5
5
±350
55
120
65
12
12
—
—
—
—
—
ns
ns
Slew Rate
V/µs
MHz
MHz
µVrms
dB
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
INPUTS
MIN.
TYP. MAX. UNITS
—
—
–80
Input Voltage Range
Input Impedance
Digitals Inputs (Balanced ECL)
Logic Levels
Logic 1
–1.5
0.3
—
1
+1.5
—
Volts
MΩ
—
—
—
±0.5
±2
±2.5
±1.5
±5
±10
mV/µs
mV/µs
mV/µs
–1.5
–2.5
—
—
+1.8
+0.8
Volts
Volts
Logic 0
POWER SUPPLY REQUIREMENTS
Logic Loading
Logic 1
Logic 0
—
—
+10
–30
+50
–150
µA
µA
Power Supply Range
+5V Supply
–5V Supply
Power Supply Current
+5V Supply
–5V Supply
+4.5
–5.5
+5
–5
+5.5
–4.5
Volts
Volts
OUTPUTS
Output Voltage Range
Output Current •
Output Impedance (dc)
–1.5
± 30
—
—
—
0.3
—
+1.5
—
1
Volts
mA
Ω
+17
–17
170
40
+25
–25
250
60
+30
–30
300
—
mA
mA
mW
dB
Power Dissipation
Power Supply Rejection Ratio
Stable Capacitive Load
—
50
pF
PERFORMANCE
ENVIRONMENTAL
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
Operating Temp. Range, Case
SHM-12S, SHM-12L
SHM-12LM
Storage Temperature Range
Package Type
—
—
—
±0.006
—
—
—
±0.024
±0.024
%
%
%
–40
–55
–65
—
—
—
+85
+125
+150
°C
°C
°C
—
—
—
±12
—
—
—
±20
±30
mV
mV
mV
SHM-12S
SHM-12L, SHM-12LM
20-Pin plastic SOIC
20-Pin ceramic LCC
Footnotes:
• Short circuit protection at ±50mA.
—
—
—
±3
—
—
—
±20
±20
—
mV
mV
mV
V/V
TECHNICAL NOTES
+0.98 +0.995
The SHM-12 employs an open loop architecture to achieve its
superior high-speed characteristics. The first stage buffer
amplifier incorporates the sample-and-hold switch. This 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.
—
—
—
—
±20
±30
ppm/°C
ppm/°C
—
—
2
2
—
—
ns
ns
—
—
1
1
—
—
ps rms
ps rms
–55 to +125°C
Harmonic Distortion (±1V)
dc to 1MHz
—
–75
—
dB
dc to 10MHz
+25°C
–40 to +85°C
The design has been optimized to achieve the high accuracy
associated with fast transient responses over the military tem-
perature range. During the track-to-hold transient, the integral
nonlinearity is not affected and the pedestal remains constant
over the full ±1.5V input range.
—
—
—
–62
—
—
—
–56
–54
dB
dB
dB
–55 to +125°C
Acquisition Time (±0.012%, ±1V)
–40 to +85°C
–55 to +125°C
Acquisition Time (±0.024%, ±1V)
–40 to +85°C
–55 to +125°C
Acquisition Time (±0.05%, ±1V)
–40 to +85°C
—
—
20
30
—
—
ns
ns
An innovative circuit design ensures an extremely low droop rate.
An external hold capacitor can be added to the 15pF internal
hold capacitor to obtain a lower droop rate (the droop rate is pro-
portional to the inverse of the total hold capacitor value) without
increasing transient response times by more than a few ns. The
external hold capacitor should not exceed 100pF.
—
—
15
25
30
40
ns
ns
—
—
12
15
25
30
ns
ns
–55 to +125°C
2
®
®
S HM-1 2
GROUNDING AND LAYOUT
Locate the bypass capacitors as close to the unit as possible.
Obtaining fully specified performance from the SHM-12 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 com-
ponents as close to the required pins as possible. It is strongly
recommended that the SHM-12 not be socket-mounted.
For optimal performance, tie all grounds directly to a large ana-
log ground plane beneath and around the package. Bypass all
power supplies to ground with 10µF tantalum capacitors in paral-
lel with 0.1µF ceramic capacitors.
50W
50W
19
18
SHM-12
SAMPLE / HOLD
SAMPLE
HOLD
1
2
SAMPLE / HOLD
–5V SUPPLY
–5V SUPPLY
0.1µF
0.1µF
20
+5V SUPPLY
+5V SUPPLY
4
5
7
17
ANALOG
INPUT
INPUT
HO LD
C
15
EXTERNAL HOLD
CAPACITOR
–5V SUPPLY
50W
Refer to Table 1 for optional
HOLD capacitor value.
14, 16
GROUND
–5V SUPPLY
–5V SUPPLY
0.1µF
9
13
0.1µF
10µF
+5V SUPPLY
+5V SUPPLY
12
11
10
0.1µF
10µF
ANALOG
OUTPUT
–5V SUPPLY
OUTPUT
R Load
Pin 3 is not connected;
do not connect pins 6 and 8.
100W
0.1µF
0.1µF
+5V
–5V
Figure 2. SHM-12 Simplified Connection Diagram
-0.8 V
HOLD
SAMPLE
HOLD
-1.8 V
-0.8 V
SAMPLE
HOLD
SAMPLE
-1.8 V
+1 V
Acquisition
Time to
ANALOG
INPUT
±0.024%
-1 V
15ns typ.
+1 V
7ns typ.
ANALOG
OUTPUT
7ns typ.
Feedthrough -80dB
Track-to-hold Settling
-1 V
to ±0.024%
15ns typ.
Figure 3. SHM-12 Control and Timing
3
®
®
S HM-1 2
Evaluation Board
for CLCC-20 Version
–5V SUPPLY
16, 17, 18, 19
0.1µF
W
130
SAMPLE
SHM-12
14
130W
82W
19
18
82W
1, 2
–5V SUPPLY
INPUT
SAMPLE / HOLD
0.1µF
HOLD
SAMPLE / HOLD
13
ANALOG
INPUT
17, 20
4
+5V SUPPLY
0.1µF
20
CHOLD
15
EXTERNAL HOLD
CAPACITOR
W
51
5, 7
14, 16
13
CHOLD = 100pF;
Refer to Table 1.
GROUND
–5V SUPPLY
0.1µF
+5V SUPPLY
+5V SUPPLY
6, 7, 8, 9, 10
0.1µF
12
+5V SUPPLY
OUTPUT
9, 10
11
–5V SUPPLY
–5V SUPPLY
ANALOG
OUTPUT
11, 12, 15
0.1µF
0.1µF
5
GROUND
1, 2, 3, 4
GROUND PLANE
Figure 4. SHM-12 Evaluation Board Schematic
Table 1. Optional External HOLD Capacitor
Operating
Type of HOLD Capacitor
Model
Temperature Range
(Ceramic, ≤100pF, ±10%)
SHM-12L, -12S
SHM-12LM
–40 to +85°C
–55 to +125°C
Type I or II, NPO or X7R
Type I or NPO
4
®
®
S HM-1 2
INCHES
(mm)
0.43
(11)
(TOP VIEW)
0.85
(21.59)
PLASTIC
STANDOFF
0.13
(3.3)
0.100
(2.54)
20
19
18
17
16
15
14
13
12
11
1
2
3
4
1
20
19
18
17
16
15
14
13
12
11
C2
R1
2
C3
3
4
C5
C1
C7
5
6
5
1.10
(27.94)
C4
6
R4
7
7
R3
8
8
R6
R5
C6
0.018
(0.45)
9
9
10
10
(BOTTOM VIEW)
0.95
(24.13)
Figure 5. SHM-12 Evaluation Board Dimensions
SHM-12 Evaluation Board Connections
PIN
FUNCTION
1
2
GROUND
GROUND
3
GROUND
4
GROUND
5
6
7
8
ANALOG OUTPUT
+5V SUPPLY
+5V SUPPLY
+5V SUPPLY
+5V SUPPLY
+5V SUPPLY
–5V SUPPLY
–5V SUPPLY
HOLD
9
10
11
12
13
14
15
16
17
18
19
20
SAMPLE
–5V SUPPLY
–5V SUPPLY
–5V SUPPLY
–5V SUPPLY
–5V SUPPLY
ANALOG INPUT
5
®
®
S HM-1 2
MECHANICAL DIMENSIONS
TOP VIEW
A
SOIC-20 Package
J
L
20
11
INCHES
MILLIMETERS
SYMBOL
MIN.
MAX.
0.510
0.410
0.299
0.019
MIN.
12.70
10.16
7.40
MAX.
12.95
10.41
7.60
A
B
C
D
E
F
G
H
J
0.500
0.400
0.292
0.014
C
B
0.35
0.48
0.0500 BSC
1.27 BSC
K
0.0039
0°
0.0112
8°
0.10
0°
0.30
8°
H
1
10
0.020
0.097
0.010
0.0091
0.040
0.104
0.020
0.0125
0.51
2.46
0.25
0.23
1.02
2.64
0.51
0.32
E
D
G
K
L
F
A
CLCC-20 Package
D
MILLIMETERS
INCHES
SYMBOL
MIN.
MAX.
0.100
0.055
MIN.
1.63
1.14
MAX.
2.54
1.40
A
B
C
D
E
F
0.064
0.045
B
C
0.075 REF
0.342
0.022
1.91 REF
8.69
0.56
E
0.358
0.028
9.09
0.71
G
0.020 REF
0.51
PIN 1 INDEX
G
H
0.050 BSC
0.040 REF
1.27 BSC
1.02
(H x 45°
3 PLACES)
H
F
(F x 45°)
BOTTOM VIEW
ORDERING INFORMATION
MODEL NUMBER
PACKAGE
TEMPERATURE RANGE
SHM-12S
SHM-12L
SHM-12LM
EVB-SHM12
SOIC-20
CLCC-20
CLCC-20
–40 to +85°C
–40 to +85°C
–55 to +125°C
Evaluation Board (with SHM-12LM)
Contact DATEL for availability of high-reliability models.
®
®
ISO 9001
INN OVAT ION and E XCELLENCE
R
E
G
I
S
T
E
R
E
D
DS-0310 10/96
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:sales@datel.com
Data Sheet Fax Back: (508) 261-2857
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.
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