Amplifier and Data Converter Selection Guide

42
Amplifiers
➔
Power Amplifiers and Buffers
High-Performance, Closed-Loop, Wideband, Unity Gain Buffer
BUF602
Get samples, datasheets and app reports at: www.ti.com/sc/device/BUF602
Key Features
• Small signal bandwidth:1000MHz
• Very high slew rate: 8000V/µs
• High FPBW: 880MHz for 5Vpp
• Low supply current: 5.8mA
• Closed-loop design
• Low output impedance (1.4Ω typ)
• Flexible supply range:
• ±1.4V to ±6.3V dual supply
• +2.8V to +12.6V single supply
Applications
• High CMRR ADC drivers
• Negative impedance converter filters
• Simple, wideband video buffers
• Flexible diode drivers
• Medical imaging
By using a closed-loop design, the BUF602 provides a very low output impedance through high frequencies
using a low 5.8mA quiescent current. An optional feature has been added to benefit single-supply
operation. A second very low power buffer takes a mid-supply reference developed through two
50kΩ resistors and drives this reference out through an internal 200Ω resistor. This feature provides
an approximate mid-supply DC operating point for the high-speed buffer in AC-coupled, single-supply
applications.
V IN
≈ 2kΩ Input Z
2kΩ
+V CC
x1
x1
V CC /2
Z O < 2Ω to 20MHz
V OUT
Single-supply, wideband buffer.
Power Amplifiers Selection Guide
I OUT V S Bandwidth Slew Rate I Q V OS V OS Drift I B
Device (A) (V) (MHz) (V/µs) (mA) (max) (mV) (max) (µV/°C) (max) (nA) (max) Package(s) Price *
OPA445/B 0.015 20 to 90 2 15 4.7 5 10 0.1 DIP8, SO8 $4.75
OPA452 0.05 20 to 80 1.8 8 6.5 3 5 0.1 TO220-7, DDPak-7 $2.55
OPA453 0.05 20 to 80 7.5 20 6.5 3 5 0.1 TO220-7, DDPak-7 $2.55
OPA541 10 20 to 80 0.055 6 25 10 40 0.05 ZIP-11 $11.10
OPA544 4 20 to 70 1.4 8 15 5 10 0.1 TO220-5, DDPak-5 $6.85
OPA2544 2 20 to 70 1.4 8 15 5 10 0.1 ZIP11 $12.00
THS3041 1.25 10 to 30 210 7300 10.5 3 10 20µA SOIC, SOIC PowerPAD $2.45
OPA547 0.5 8 to 60 1 6 15 5 25 500 TO220-7, DDPak-7 $4.35
OPA548 3 8 to 60 1 10 20 10 30 500 TO220-7, DDPak-7 $6.00
OPA549 8 8 to 60 0.9 9 35 5 20 500 ZIP11 $12.00
OPA551 0.2 8 to 60 3 15 7 3 7 0.1 DIP8, SO8, DDPak-7 $1.75
OPA552 0.2 8 to 60 12 24 7 3 7 0.1 DIP8, SO8, DDPak-7 $1.75
OPA561 1.2 7 to 16 17 50 70 20 50 0.1 HTSSOP-20 $2.65
OPA567 2.4 2.7 to 5.5 1.2 1.2 6 2 1.3 0.01 QFN-12 PowerPAD $1.85
OPA569 2.4 2.7 to 5.5 1.2 1.2 6 2 1.3 0.01 SO-20, PowerPAD $3.10
* Suggested resale price in U.S. dollars in quantities of 1,000. New products are listed in bold red.
Buffers Selection Guide (Sorted by Ascending BW at A CL )
A CL (min) Settling THD V N at
V S V S V S V S Stable BW Slew Time I Q (FC = Diff Diff Flatband V OS I B
±15 ±5 3.3 5 Gain at A CL Rate 0.01% (mA) 1MHz) Gain Phase (nV/ Hz) (mV) (µA)
Device (V) (V) (V) (V) (V/V) (MHz) (V/µs) (ns) (typ) (typ) (dB) (typ) (%) (°) (typ) (max) (max) Package(s) Price *
OPA692 — Yes — Yes 1 280 2000 12 [0.02%] 5.8 –78 0.07 0.02 1.7 2.5 45 SOT23, SOIC $1.45
OPA832 — Yes Yes Yes 1 92 350 45 [0.1%] 5.9 –84 0.1 0.16 9.3 5 0.01 SOT23, SOIC $0.70
BUF634 Yes Yes — Yes 1 180 2000 200 20 — 0.4 0.1 4 100 20 DIP, SOIC, TO220-5, $3.05
DDPak-5
OPA633 Yes Yes — — 1 260 2500 50 30 — — 0.1 — 15 35 DIP $5.45
OPA693 No Yes No Yes 1 1400 2500 12 (0.1%) — –84 0.03 0.01 1.8 2 45 SOT23, SOIC $1.30
BUF602 No Yes Yes Yes 1 1200 8000 6 (0.05%) 5.8 — 0.15 0.04 4.8 16 7 SOT23, SOIC $0.85
* Suggested resale price in U.S. dollars in quantities of 1,000. New products are listed in bold red.
Amplifier and Data Converter Selection Guide Texas Instruments 3Q 2006