THS4522

THS4521

THS4524

1

FEATURES

APPLICATIONS

DESCRIPTION

THS4521

ADS1278 (CH1)

49.9 W

1kW

49.9 W

V

OCM

V

IN+

V

IN-

5V

V

COM

1kW

1kW

2.2nF

AINN1

AINP1

0.1 F

m

0.1 F

m

x1

1/2

OPA2350

1.5nF

1.5nF

1kW

0

20

40

60

80

100

120

140

160

-

-

-

-

-

-

-

-

0

4

8

12

16

20

24 26

Frequency(kHz)

1-kHzFFT

G=1

R =R =1k

C =1.5nF

V =5V

Load=2x49.9

+2.2nF

F

G

F

S

W

W

THS4521andADS1278CombinedPerformance

Tone

(Hz)

1k

Signal

(dBFS)

0.50

-

SNR(dBc)

109.1

THD(dBc)

107.9

-

SINAD

(dBc)

105.5

SFDR

(dBc)

113.7

THS4521

THS4522

THS4524

VERY LOW POWER, NEGATIVE RAIL INPUT, RAIL-TO-RAIL OUTPUT,

FULLY DIFFERENTIAL AMPLIFIER

• Low-Power SAR and ΔΣ ADC Drivers

2

• Fully Differential Architecture

• Low-Power Differential Driver

• Bandwidth: 145 MHz

• Low-Power Differential Signal Conditioning

• Slew Rate: 490 V/µs

• HD

• HD

The THS4521, THS4522, and THS4524 family of

• Input Voltage Noise: 4.6 nV/√Hz (f = 100 kHz)

devices are very low-power, fully differential op amps

• NRI—Negative Rail Input

with rail-to-rail output and an input common-mode

range that includes the negative rail. These amplifiers

• RRO—Rail-to-Rail Output

are designed for low-power data acquisition systems

• Output Common-Mode Control (with Low

and

high-density

applications

where

power

Offset and Drift)

dissipation is a critical parameter.

• Power Supply:

The

family

includes

single

(THS4521),

dual

–

Voltage: +2.5 V (±1.25 V) to +5.5 V (±2.75 V)

(THS4522), and quad (THS4524) versions.

–

Current: 1.14 mA/ch

These fully differential op amps feature accurate

• Power-Down Capability: 20 µA (typ)

output

common-mode

control

that

allows

for

dc-coupling when driving analog-to-digital converters

(ADCs).

This

control,

coupled

with

an

input

common-mode range below the negative rail as well

as rail-to-rail output, allows for easy interfacing

between

single-ended,

ground-referenced

signal

sources. Additionally, these devices are ideally suited

for driving both successive-approximation register

(SAR) and delta-sigma (

ΔΣ) ADCs using only a single

+3V to +5V and ground power supply.

The THS4521, THS4522, and THS4524 family of fully

differential op amps is characterized for operation

over the full industrial temperature range from –40°C

to +85°C.

RELATED

PRODUCTS

THD

(dBc)

BW

at 100

RAIL-

DEVICE

(MHz)

kHz

(nV/

√Hz)

TO-RAIL

THS4520

570

15.3

–114

2

Out

THS4121

100

16

–79

5.4

In/Out

THS4130

150

16

–107

1.3

No

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2009, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.