ADA4937-2YCPZ-R2

ADA4937-2YCPZ-R2 Datasheet


The ADA4937-1/ADA4937-2 are low noise, ultralow distortion, high speed differential amplifiers. They are an ideal choice for driving high performance ADCs with resolutions up to 16 bits from dc to 100 MHz. The adjustable level of the output common mode allows the ADA4937-1/ADA4937-2 to match the input of the ADC. The internal common-mode feedback loop also provides exceptional output balance as well as suppression of even-order harmonic distortion products.

Part Datasheet
ADA4937-2YCPZ-R2 ADA4937-2YCPZ-R2 ADA4937-2YCPZ-R2 (pdf)
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Data Sheet

Extremely low harmonic distortion HD −112 dBc HD2 at 10 MHz −84 dBc HD2 at 70 MHz −77 dBc HD2 at 100 MHz −102 dBc HD3 at 10 MHz −91 dBc HD3 at 70 MHz −84 dBc HD3 at 100 MHz

Low input voltage noise High speed
−3 dB bandwidth of GHz, G = 1 Slew rate 6000 V/us, 25% to 75% Fast overdrive recovery of 1 ns mV typical offset voltage Externally adjustable gain Differential-to-differential or single-ended-to-differential operation Adjustable output common-mode voltage Single-supply operation V to 5 V

ADC drivers Single-ended-to-differential converters IF and baseband gain blocks Differential buffers Line drivers

The ADA4937-1/ADA4937-2 are low noise, ultralow distortion, high speed differential amplifiers. They are an ideal choice for driving high performance ADCs with resolutions up to 16 bits from dc to 100 MHz. The adjustable level of the output common mode allows the ADA4937-1/ADA4937-2 to match the input of the ADC. The internal common-mode feedback loop also provides exceptional output balance as well as suppression of even-order harmonic distortion products.

With the ADA4937-1/ADA4937-2, differential gain configurations are easily realized with a simple external feedback network of four resistors that determine the closed-loop gain of the amplifier.

The ADA4937-1/ADA4937-2 are fabricated using Analog Devices, Inc., proprietary silicon-germanium SiGe , complementary bipolar process, enabling them to achieve very low levels of distortion with an input voltage noise of only The low dc offset and excellent dynamic performance of the ADA4937-1/ADA4937-2 make them well-suited for a wide variety of data acquisition and signal processing applications.

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Ultralow Distortion Differential ADC Driver ADA4937-1/ADA4937-2

FUNCTIONAL BLOCK DIAGRAMS

ADA4937-1
16 15 14 13
1 +IN 2 3 +FB 4
12 PD 11 10 +OUT 9 VOCM
06591-001
+VS 5 +VS 6 +VS 7 +VS 8

Figure ADA4937-1 ADA4937-2
24 +IN1 23 22 21 20 PD1 19
1 +FB1 2 +VS1 3 +VS1 4 5 +IN2 6
18 +OUT1 17 VOCM1 16 15 14 PD2
7 +FB2 8 +VS2 9 +VS2 10 VOCM2 11 +OUT2 12
06591-002

Figure ADA4937-2

HD2, VS = 5.0V

HD3, VS = 5.0V

HD2, VS = 3.3V HD3, VS = 3.3V

DISTORTION dBc
06591-003

FREQUENCY MHz

Figure Harmonic Distortion vs. Frequency

The ADA4937-1/ADA4937-2 are available in a Pb-free, 3 mm x 3 mm, 16-lead LFCSP ADA4937-1, single or a Pb-free, 4 mm x 4 mm, 24-lead LFCSP ADA4937-2, dual . The pinout has been optimized to facilitate PCB layout and minimize distortion. The ADA4937-1/ADA4937-2 are specified to operate over the automotive −40°C to +105°C temperature range and between V and 5 V supplies.

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Tel Analog Devices, Inc. All rights reserved.

Technical Support

ADA4937-1/ADA4937-2
Data Sheet
Analyzing an Application Circuit 18 Setting the Closed-Loop Gain 18 Estimating the Output Noise Voltage 18 Impact of Mismatches in the Feedback Networks 19 Calculating the Input Impedance for an Application Circuit 19 Input Common-Mode Voltage Range in Single-Supply Applications 20 Setting the Output Common-Mode Voltage 20 Power-Down Operation 20 Layout, Grounding, and 22 High Performance ADC Driving 23 V Operation 25 Outline Dimensions 26 Ordering Guide 26
Changes to Figure 5 and Figure Added EP Row to Table 7 and EP Row to Table 8 Added Figure 46, Figure 47, and Figure 48 Renumbered Sequentially 15 Changes to Table 18 Changes to Input Common-Mode Voltage Range in SingleSupply Applications 20 Changes to Ordering Guide 26
0 Initial Version

Data Sheet

ADA4937-1/ADA4937-2

SPECIFICATIONS
5 V OPERATION

TA = 25°C, +VS = 5 V, −VS = 0 V, VOCM = +VS/2, RT = Ω, RG = RF = 200 Ω, Gain G = +1, RL, dm = 1 unless otherwise noted. All specifications refer to single-ended input and differential outputs, unless otherwise noted. ±DIN to ±OUT Performance

Table Parameter DYNAMIC PERFORMANCE
−3 dB Small Signal Bandwidth for dB Flatness Large Signal Bandwidth Slew Rate Settling Time Overdrive Recovery Time NOISE/HARMONIC PERFORMANCE Second Harmonic

Third Harmonic

IMD Voltage Noise RTI Input Current Noise Figure Crosstalk ADA4937-2 INPUT CHARACTERISTICS Offset Voltage

Input Bias Current

Input Offset Current Input Resistance

Input Capacitance Input Common-Mode Voltage CMRR OUTPUT CHARACTERISTICS Output Voltage Swing Linear Output Current Output Balance Error

Test Conditions/Comments

VOUT, dm = V p-p VOUT, dm = V p-p VOUT, dm = 2 V p-p VOUT, dm = 2 V p-p 25% to 75% VOUT, dm = 2 V p-p VIN = 0 V to V step G = See Figure 51 for distortion test circuit VOUT, dm = 2 V p-p 10 MHz VOUT, dm = 2 V p-p 70 MHz VOUT, dm = 2 V p-p 100 MHz VOUT, dm = 2 V p-p 10 MHz VOUT, dm = 2 V p-p 70 MHz VOUT, dm = 2 V p-p 100 MHz f1 = 70 MHz f2 = MHz VOUT, dm = 2 V p-p f = 100 kHz f = 100 kHz G = 4 RT = 136 RF = 200 RG = 37 Ω f = 100 MHz f = 100 MHz

VOS, dm = VOUT, dm/2 VDIN+ = VDIN− = V TMIN to TMAX variation

TMIN to TMAX variation

Differential Common mode
cm = ±1 V

Maximum single-ended output RF = RG = 10 Per amplifier RL, dm = 20 f = 10 MHz dm = 1 V f = 10 MHz see Figure 50 for test circuit

Min Typ

Max Unit
1900
1700
6000

V/µs
−112 −84 −77 −102 −91 −84 −91 4 15 −72
dBc dB
µV/°C
−50 −30
−10 µA
µA/°C
−2
+2 µA
−69 −80
±70 −61

V mA dB

ADA4937-1/ADA4937-2

VOCM to ±OUT Performance

Table Parameter VOCM DYNAMIC PERFORMANCE
−3 dB Bandwidth Slew Rate Input Voltage Noise RTI VOCM INPUT CHARACTERISTICS Input Voltage Range Input Resistance Input Offset Voltage Input Bias Current VOCM CMRR Gain POWER SUPPLY Operating Range Quiescent Current per Amplifier
ORDERING GUIDE

Model1 ADA4937-1YCPZ-R2 ADA4937-1YCPZ-RL ADA4937-1YCPZ-R7 ADA4937-2YCPZ-R2 ADA4937-2YCPZ-RL ADA4937-2YCPZ-R7
1 Z = RoHS Compliant Part.

PIN 1 INDICATOR

SEATING PLANE

COMPLIANT TO JEDEC STANDARDS MO-220-WEED.

Figure 16-Lead Frame Chip Scale Package [LFCSP] 3 mm x 3 mm Body and mm Package Height CP-16-21 Dimensions shown in millimeters
19 18

EXPOSED PAD

PIN 1 INDICATOR

TOP VIEW
13 12

BOTTOM VIEW

MAX NOM

FOR PROPER CONNECTION OF THE EXPOSED PAD, REFER TO THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION OF THIS DATA SHEET.

COPLANARITY

COMPLIANT TO JEDEC STANDARDS MO-220-WGGD-8.

Figure 24-Lead Frame Chip Scale Package [LFCSP] 4 mm x 4 mm Body and mm Package Height CP-24-10 Dimensions shown in millimeters
06-11-2012-A

Temperature Range −40°C to +105°C −40°C to +105°C −40°C to +105°C −40°C to +105°C −40°C to +105°C −40°C to +105°C

Package Description 16-Lead LFCSP 16-Lead LFCSP 16-Lead LFCSP 24-Lead LFCSP 24-Lead LFCSP 24-Lead LFCSP

Package Option CP-16-21 CP-16-21 CP-16-21 CP-24-10 CP-24-10 CP-24-10
Ordering Quantity 250 5,000 1,500 250 5,000 1,500

Branding H1S

Data Sheet NOTES

ADA4937-1/ADA4937-2

ADA4937-1/ADA4937-2 NOTES

Data Sheet

Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.

D06591-0-6/16 F
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Datasheet ID: ADA4937-2YCPZ-R2 517802