ADS1625

ADS1626

SBAS280E − JUNE 2003 − REVISED MAY 2007

www.ti.com

4

ELECTRICAL CHARACTERISTICS (continued)

All specifications at −40

°C to +85°C, AVDD = 5V, DVDD = IOVDD = 3V, fCLK = 40MHz, External VREF = +3V, VCM = 2.0V, FIFO disabled, and

RBIAS = 37kΩ, unless otherwise noted.

PARAMETER

UNIT

MAX

TYP

MIN

TEST CONDITIONS

fIN = 10kHz, −2dBFS

104

dB

fIN = 10kHz, −6dBFS

106

dB

fIN = 10kHz, −20dBFS

99

dB

fIN = 100kHz, −2dBFS

97

dB

Spurious-free dynamic range (SFDR)

fIN = 100kHz, −6dBFS

103

dB

Spurious-free dynamic range (SFDR)

fIN = 100kHz, −20dBFS

92

102

dB

fIN = 500kHz, −2dBFS

120

dB

fIN = 500kHz, −6dBFS

113

dB

fIN = 500kHz, −20dBFS

99

dB

Intermodulation distortion (IMD)

f1 = 495kHz, −2dBFS

f = 505kHz, −2dBFS

−98

dB

Intermodulation distortion (IMD)

f1 = 495kHz, −2dBFS

f2 = 505kHz, −2dBFS

−98

dB

Aperture delay

4

ns

Digital Filter Characteristics

Passband

0

550

f

CLK

40MHz

kHz

Passband ripple

± 0.0025

dB

Passband transition

−0.1dB attenuation

575

f

CLK

40MHz

kHz

Passband transition

−3.0dB attenuation

615

f

CLK

40MHz

kHz

Stop band

0.7

f

CLK

40MHz

39.3

f

CLK

40MHz

MHz

Stop band attenuation

72

dB

Group delay

20.8

40MHz

f

CLK

µs

Settling time

To

±0.001%

36.8

40MHz

f

CLK

µs

Static Specifications

Resolution

18

Bits

No missing codes

18

Bits

Input referred noise

1.5

LSB, rms

Integral nonlinearity

−2.0dBFS signal

3.5

LSB

Differential nonlinearity

±0.5

LSB

Offset error

0.05

%FSR

Offset error drift

1

ppmFSR/

°C

Gain error

0.25

%

Gain error drift

Excluding reference drift

10

ppm/

°C

Common-mode rejection

at DC

75

dB

Power-supply rejection

at DC

65

dB