Figure 1. Functional Block Diagram
+
–
1234567
14 13 12 11 10 9 8
NC NC NC -IN +IN -VSNC
NC NC NC +VSOUT NC COM.
FEATURES
200 Nanoseconds settling to 0.01%
100V/Microsecond slew rate
100 MHz Minimum gain-bandwidth
106 Open loop gain
1 Microvolt/°C drift
±50 mA Output current
The AM-500 series amplifi ers are ultra-fast
settling operational amplifi ers for use in inverting
applications. A unique feedforward amplifi er design
combines the characteristics of a low drift dc
amplifi er with those of a very fast AC amplifi er. For
optimum fast settling performance, this amplifi er
has an open loop gain roll-off of 6 dB per octave
to beyond 100 MHz. Miniature thin-fi lm hybrid
construction permits an optimum combination of
semiconductor devices and minimum lead lengths
to realize the amplifi er circuitry. Applications
for the AM-500 Series include fast integrators,
sample-holds, fast waveform drivers, and fast D/A
converter output amplifi ers.
Output settling time is 200 nanoseconds
maximum to 0.01% for a 10 dc volt step change.
Slew rate is 1000V/microsecond for positive output
transitions and 1800V/microsecond for negative
transitions. This high slew rate permits undistorted
reproduction of a full load, 20V peak-to-peak
sinewave out to 16 MHz. Gain bandwidth product is
100 MHz minimum.
AM-500 series dc characteristics include a dc
open loop gain of 106, 30 megohm input imped-
ance, and 1 nanoampere bias current. Input offset
voltage is ±0.5 mV and input offset voltage drift
is 1 microvolt/°C. Although these amplifi ers do
not operate differentially, a dc offset voltage in
the range of ±5V dc can be applied to the positive
input terminal.
Power supply requirement is ±15V dc at 22 mA
quiescent current. The amplifi ers will operate over
a supply range of ±10V to ±18V dc. Output current
capability is ±50 mA with output short circuit
protection. Three basic versions are available:
AM-500GC and AM-500MC for 0°C to + 10°C, and
the AM-500MM for -55°C to +125°C. The device
package is a 14-pin ceramic DIP.
PRODUCT OVERVIEW
FUNCTIONAL BLOCK DIAGRAM
PIN FUNCTION
1 N.C.
2 N.C.
3 N.C.
4 -INPUT
5 +INPUT
6 -SUPPLY
7 N.C.
8 COMMON
9 N.C.
10 OUTPUT
11 + SUPPLY
12 N.C.
13 N.C.
14 N.C.
AM-500 Series
Ultra-Fast Operational Amplifi ers
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
01 Apr 2011 MDA_AM-500.B02 Page 1 of 4
FUNCTIONAL SPECIFICATIONS
(Typical at +25°C, ±15V dc supply, unless otherwise noted.)
INPUT CHARACTERISTICS MIN. TYP. MAX. UNITS
Common Mode Voltage Range ➀— ±5 — Volts
Maximum Input Voltage, no damage — ±18 — Volts
Differential Input Impedance 3 30 — Meg
Input Bias Current — 1 4 nA
Input Offset Current — 0.5 8 nA
Input Offset Voltage — 0.5 3 mV
OUTPUT CHARACTERISTICS
Output Voltage ±10 — — Volts
Output Current, S.C. protected ±25 ±50 — mA
Stable Capacitative Load — 100 — pF
Output Impedance — 25 — Ω
PERFORMANCE
DC Open Loop Gain 106—V/V
Input Offset Voltage Drift
0°C to + 70°C — 1 5 μV/°C
-55°C to +125°C — 5 10 μV/°C
Input Bias Current Drift
0°C to + 70°C — -20 — pA/°C
-55°C to +125°C doubles every 10°C
Input Voltage Noise ➁
0.01 Hz to 1 Hz — 15 — μVp-p
100 Hz to 10 kHz — 1.6 — μVrms
1 Hz to 10 MHz — 5.2 — μVrms
Input Current Noise ➃
0.01Hz to 10Hz — 5 25 μVp-p
100Hz to 10kHz — 1 5 μVrms
10Hz to 1MHz — 20 100 μVrms
Power Supply Rejection Ratio 80 — — dB
DYNAMIC CHARACTERISTICS
Gain Bandwidth Product 100 130 — MHz
Slew Rate, positive going — 1000 — V/μs
Slew Rate, negative going — 1800 — V/μs
Full Power Frequency
(20V peak-to-peak) — 16 — MHz
Settling Time
10V step to 1%3—70—ns
10VsteptoO.1%3— 100 — ns
10VsteptoO.01%3— — 200 ns
Overload Recovery Time — 10 — μs
POWER REQUIREMENTS
Voltage, rated performance — ±15 — Vdc
Voltage, operating ± 10 — ± 18 Vdc
Quiescent Current — 22 33 mA
Footnotes:
➀ dc only
➁ - 3 dB Single-pole bandwidth
➂ 1k Input and feedback resistors, 2.4 pF feedback capacitor
PHYSICAL/ENVIRONMENTAL MIN. TYP. MAX. UNITS
Operating Temp. Range
AM-500GC 0 — +70 °C
AM-500MC 0 — +70 °C
AM-500MM, MM-QL –55 — +125 °C
Storage Temp. Range –55 — +125 °C
Package Type 14-pin ceramic
Pins 0.010xO.018˝ Kovar
Weight 0.09 ounces (2.5 grams)
TECHNICAL NOTES
1. The circuit design shows the connection of the AM-500
series for fast settling operation with a closed loop gain of
-1. It can be used for fast settling at closed loop gains up
to -10. The equivalent resistance seen by the summing
junction should be 500 ohms or less. For gains larger than
- 1 use an input resistor of 500 ohms and pick a feedback
resistor for the required closed loop gain (1k for -2, 1.5k for
-3, etc.).
2. A small feedback capacitor should be used across the
feedback resistor. Determine C in nanofarads from the
following formula:
where G is closed loop gain and Rf is in kilohms.
3. Summing point leads must be kept as short as possible.
Input and feedback resistors should be soldered close to
the body of the resistor directly to the summing point (pin
4). Summing point capacitance to ground must be kept very
low.
4. Low output impedance power supplies should be used with
1 μF tantalum bypassing capacitors at the amplifi er supply
terminals. There are internal 0.03 μF ceramic capacitors in
the amplifi er.
5. Although these amplifi ers are inverting mode only, a dc
voltage in the range of ± 5V may be applied to the positive
input terminal for offsetting the amplifi er.
6. For interrupted power applications, apply power to the AM-
500 three (3) seconds before operating the device.
1 + |G|
0.816Rf
C =
AM-500 Series
Ultra-Fast Operational Amplifi ers
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
01 Apr 2011 MDA_AM-500.B02 Page 2 of 4
Figure 3. Input Bias Current vs. Temperature
-50 -25 +25 +50 +75 +100 +1250
100 nA
10 nA
1 nA
100 pA
TEMPERATURE (°C)
BIAS CURRENT (TYPICAL)
+CURRENT −CURRENT
1 nA TYP.@
25°C DOUBLES
EVERY 10°C
−20pA/°C
Figure 2. Connection for Fast Settling with Gain of -1
AM-500
+
–
KEEP THESE
LEADS AS SHORT
AS POSSIBLE
C
INPUT
OUTPUT
ZERO
ADJ.
(±10 mV)
4
5
6
500
750K
20K
11
10
RFEEDBACK
RIN
2.4pF
+15V dc
-15V dc
+15V
-15V
1K (Rf)
1K 1μF TANTALUM
1μF TANTALUM
+
+
AM-500 Series
Ultra-Fast Operational Amplifi ers
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
01 Apr 2011 MDA_AM-500.B02 Page 3 of 4
0.500 MAX.
(12.7)
0.805 MAX.
(20.3)
0
0.300
(7.6)
78
114
0.100
(2.5)
BOTTOM
VIEW
6 SPACES
AT 0.100 EA.
(2.5)
DOT ON TOP
REFERENCES
PIN 1
NOTE: PINS HAVE 0.025 INCH STANDOFF FROM CASE
0.150 MIN.
(3.8)
0.200 (5.1) MAX.
0.700
0.100
0.010 X 0.018 KOVAR
MECHANICAL DIMENSIONS - INCHES (mm)
ORDERING INFORMATION
MODEL NUMBER OPERATING
TEMP. RANGE SEAL
AM-500GC 0 to +70°C Epoxy
AM-500MC 0 to +70°C Herm.
AM-500MM –55 to +125°C Herm.
For devices compliant to MIL-STD-883, consult the factory.
AM-500 Series
Ultra-Fast Operational Amplifi ers
. 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. Specifi cations are subject to change
without notice.
www.datel.com • e-mail: help@datel.com
®®
DATEL
11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA
ITAR and ISO 9001/14001 REGISTERED
01 Apr 2011 MDA_AM-500.B02 Page 4 of 4
