AD8036-EB Analog Devices Inc, AD8036-EB Datasheet

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AD8036-EB

Manufacturer Part Number
AD8036-EB
Description
BOARD EVAL FOR AD8036
Manufacturer
Analog Devices Inc
Series
CLAMPIN™r
Datasheet

Specifications of AD8036-EB

Rohs Status
RoHS non-compliant
Channels Per Ic
1 - Single
Amplifier Type
Voltage Feedback
Output Type
Single-Ended
Slew Rate
1200 V/µs
-3db Bandwidth
240MHz
Current - Output / Channel
70mA
Operating Temperature
-40°C ~ 85°C
Current - Supply (main Ic)
20.5mA
Voltage - Supply, Single/dual (±)
±3 V ~ 6 V
Board Type
Fully Populated
Utilized Ic / Part
AD8036
a
PRODUCT DESCRIPTION
The AD8036 and AD8037 are wide bandwidth, low distortion
clamping amplifiers. The AD8036 is unity gain stable. The
AD8037 is stable at a gain of two or greater. These devices
allow the designer to specify a high (V
clamp voltage. The output signal will clamp at these specified
levels. Utilizing a unique patent pending CLAMPIN™ input
clamp architecture, the AD8036 and AD8037 offer a 10×
improvement in clamp performance compared to traditional
output clamping devices. In particular, clamp error is typically
3 mV or less and distortion in the clamp region is minimized.
This product can be used as a classical op amp or a clamp
amplifier where a high and low output voltage are specified.
The AD8036 and AD8037, which utilize a voltage feedback
architecture, meet the requirements of many applications which
previously depended on current feedback amplifiers. The AD8036
and AD8037 exhibit an exceptionally fast and accurate pulse
response (16 ns to 0.01%), extremely wide small-signal and
CLAMPIN is a trademark of Analog Devices, Inc.
√Hz
CH
) and low (V
CL
) output
large-signal bandwidths and ultralow distortion. The AD8036
achieves –66 dBc at 20 MHz, and 240 MHz small-signal and
195 MHz large-signal bandwidths. The AD8036 and AD8037’s
recover from 2× clamp overdrive within 1.5 ns. These character-
istics position the AD8036/AD8037 ideally for driving as well as
buffering flash and high resolution ADCs.
In addition to traditional output clamp amplifier applications,
the input clamp architecture supports the clamp levels as addi-
tional inputs to the amplifier. As such, in addition to static dc
clamp levels, signals with speeds up to 240 MHz can be applied
to the clamp pins. The clamp values can also be set to any value
within the output voltage range provided that V
V
can be used in nontraditional applications such as a full-wave
rectifier, a pulse generator, or an amplitude modulator. These
novel applications are only examples of some of the diverse
applications which can be designed with input clamps.
The AD8036 is offered in chips, industrial (–40°C to +85°C)
and military (–55°C to +125°C) package temperature ranges
and the AD8037 in industrial. Industrial versions are available
in plastic DIP and SOIC; MIL versions are packaged in cerdip.
Low Distortion, Wide Bandwidth
Voltage Feedback Clamp Amps
L
. Due to these clamp characteristics, the AD8036 and AD8037
–1
–2
–3
–4
4
3
2
1
0
–4
V
V
V
L
L
L
–INPUT
+INPUT
8-Lead Plastic DIP (N), Cerdip (Q),
FUNCTIONAL BLOCK DIAGRAM
= –3V
= –2V
AD8036
= –1V
–3
–V
NC
S
1
2
3
4
–2
and SO Packages
NC = NO CONNECT
INPUT VOLTAGE – Volts
(Top View)
–1
AD8036/AD8037
AD8036/
AD8037
0
1
8
7
6
5
+V
V
OUTPUT
V
H
L
S
2
H
is greater that
V
V
V
3
H
H
H
= 3V
= 2V
= 1V
4

Related parts for AD8036-EB

AD8036-EB Summary of contents

Page 1

... MHz can be applied to the clamp pins. The clamp values can also be set to any value within the output voltage range provided that Due to these clamp characteristics, the AD8036 and AD8037 L can be used in nontraditional applications such as a full-wave rectifier, a pulse generator amplitude modulator. These novel applications are only examples of some of the diverse applications which can be designed with input clamps ...

Page 2

... Nonlinearity is defined as the voltage delta between the set input clamp voltage (V 4 Measured 50 Measured with respect to the inverting input. ations subject to change without notice. Specific ( 100 ; (AD8036 LOAD V otherwise noted) ≤ 0.4 V p-p OUT = 2.5 V p-p; 8037 3.5 V p-p 160 OUT OUT ≤ 0.4 V p-p OUT = 140 Ω; 8037 274 Ω ...

Page 3

... OUT Model AD8036 AD8036AN AD8036AR +V S AD8036AR-REEL AD8036AR-REEL7 –40°C to +85°C 7 AD8036ACHIPS AD8036-EB 5962-9559701MPA –55°C to +125°C Cerdip AD8037AN AD8037AR 6 OUT AD8037AR-REEL AD8037AR-REEL7 –40°C to +85°C AD8037ACHIPS AD8037- AD8037 AD8036/AD8037 8-LEAD PLASTIC DIP T = +150 C J PACKAGE ...

Page 4

... AD8036/AD8037 AD8036–Typical Characteristics PULSE 0.1 F GENERATOR 350ps R F AD8036 130 –V S Ω Ω PULSE 0.1 F GENERATOR 350ps OUT 130 100 IN L 49.9 0.1 F × 0.1 F AD8036 V OUT 0 100 – × Ω Ω ...

Page 5

... AD8037–Typical Characteristics R F PULSE 10 F GENERATOR + 350ps AD8037 100 –V S Ω PULSE GENERATOR 350ps 0 100 OUT 100 L 49.9 0.1 F × Ω × Ω Ω AD8036/AD8037 0.1 F AD8037 V OUT 0 100 – ...

Page 6

... AD8036/AD8037 AD8036–Typical Characteristics 300mV p-p – 102 S – 100 L 49.9 –3 –4 –5 –6 –7 –8 1M 10M 100M FREQUENCY – Hz 0.2 0.1 0 –0.1 140 V = 300mV p-p O –0 130 R = 100 L –0.3 –0.4 –0.5 –0.6 –0.7 –0.8 1M 10M 100M FREQUENCY – Hz Ω ...

Page 7

... AD8036/AD8037 3rd 4th 5th 6th 7th 8th 9th 10th 11th 3rd 4th 5th 6th 7th 8th 9th 10th 11th Ω SETTLING TIME – ns Ω ...

Page 8

... AD8036/AD8037 AD8037–Typical Characteristics 300mV p-p 274 174 R = 100 –1 –2 1M 10M 100M FREQUENCY – Hz 0.2 0 3.00mV p-p –0.1 O 249 –0 100 L 224 –0.3 –0.4 –0.5 –0.6 –0.7 –0.8 10M 1M 100M FREQUENCY – Hz Ω GAIN –5 –10 –15 10k 100k 1M 10M FREQUENCY – ...

Page 9

... AD8036/AD8037 4th 5th 6th 7th 8th 9th 10th 11th 4th 5th 6th 7th 8th 9th 10th 11th Ω SETTLING TIME – ns Ω ...

Page 10

... AD8036/AD8037–Typical Characteristics 100 1k FREQUENCY – –PSRR 70 65 +PSRR 10k 100k 1M 10M FREQUENCY – Hz 100 100 100k 1M 10M FREQUENCY – 10k 100k 100M 1G 10k 100 100M 1G 100k 100 1k 10k 100k FREQUENCY – Hz –PSRR +PSRR 100k 1M 10M 100M 1G FREQUENCY – 100 L 1M ...

Page 11

... –PSRR 66 +PSRR 100M 300M –60 – =150 100 120 140 15 AD8036/AD8037 +A OL – –A OL – 100 120 JUNCTION TEMPERATURE – C –PSRR AD8037 +PSRR AD8037 AD8036 AD8036 – 100 120 JUNCTION TEMPERATURE – JUNCTION TEMPERATURE – C 140 140 95 ...

Page 12

... AD8036/AD8037–Typical Characteristics AD8037 AD8037 –60 –40 – JUNCTION TEMPERATURE – C –2. –2.25 –2.00 AD8037 –1. –1.50 –1.25 AD8036 –1.00 –0.75 –0.50 –60 –40 – JUNCTION TEMPERATURE – WAFER LOTS 40 COUNT = 632 –6 –5 –4 –3 –2 –1 0 INPUT OFFSET VOLTAGE – mV ...

Page 13

... ABSOLUTE VALUE OF OUTPUT VOLTAGE – Volts –20 –40 –60 –80 0.8 1.0 –5 –4 –3 INPUT CLAMP VOLTAGE (V +2V +1V 0V AD8037 3RD HARMONIC AD8036 3RD HARMONIC AD8036 AD8037 V +1V +0. –1V –0. +1V +2V 0.7 0.75 0.8 0.85 0.9 0.95 1.0 POSITIVE I ...

Page 14

... AD8036/AD8037–Clamp Characteristics 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0 SETTLING TIME – ns × 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0 SETTLING TIME – ns × 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 ...

Page 15

... See Input Clamp Amp Operation and Applications sections otherwise. Feedback Resistor Choice The value of the feedback resistor is critical for optimum perfor- mance on the AD8036 (gain +1) and less critical as the gain increases. Therefore, this section is specifically targeted at the AD8036. At minimum stable gain (+1), the AD8036 provides optimum = 140 Ω ...

Page 16

... Note that the main signal path always operates closed loop, since the CLAMPIN circuit only affects A1’s noninverting input voltage ramp is applied to the AD8036’s +V for the connection just described, V OUT perfectly then should limit at exactly continues ...

Page 17

... L Unity Gain Clamping The simplest circuit for calculating the clamp levels is a unity gain follower as shown in Figure 8. In this case, the AD8036 should be used since it is compensated for noninverting unity gain. This circuit will clamp at an upper voltage set by V applied to Pin 8) and a lower voltage set by V applied to Pin 5) ...

Page 18

... AD9002 during power-up transients. Programmable Pulse Generator The AD8036/AD8037’s clamp output can be set accurately and has a well controlled flat level. This along with wide bandwidth and high slew rate make them very well suited for programmable level pulse generators ...

Page 19

... The sum of these two actions results in an output that is equal to unity times the input signal for positive input signals, see Fig- ure 13. For a input/output scope photo with an input signal of 20 MHz and amplitude ± see Figure 14. LOWER CLAMPING LEVEL WITH NO NEG INPUT OUT IN – AD8036/AD8037 +15V 0 PULSE OUT 0 –15V 604 , is left floating and plays no role in this circuit ...

Page 20

... AD8036/AD8037 Thus for either positive or negative input signals, the output is unity times the absolute value of the input signal. The circuit can be easily configured to produce the negative absolute value of the input by applying the input The circuit can get to within about ground during the time when the input crosses zero ...

Page 21

... Evaluation Board An evaluation board for both the AD8036 and AD8037 is available that has been carefully laid out and tested to demon- strate that the specified high speed performance of the device can be realized. For ordering information, please refer to the Ordering Guide ...

Page 22

... AD8036/AD8037 ...

Page 23

... MAX 0.150 0.200 (5.08) (3.81) 0.125 (3.18) MIN 15° SEATING 0° 0.023 (0.58) 0.070 (1.78) PLANE 0.014 (0.36) 0.030 (0.76) AD8036/AD8037 0.195 (4.95) 0.115 (2.93) 0.015 (0.381) 0.008 (0.204) 0.0196 (0.50) 45 0.0099 (0.25) 8 0.0500 (1.27) 0 0.0160 (0.41) 0.015 (0.38) 0.008 (0.20) ...

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