ADS1625

ADS1626

SBAS280E − JUNE 2003 − REVISED MAY 2007

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3

ELECTRICAL CHARACTERISTICS

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

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Analog Input

0dBFS

±1.467VREF

V

Differential input voltage (VIN)

(AINP − AINN)

−2dBFS

±1.165VREF

V

Differential input voltage (VIN)

(AINP − AINN)

−6dBFS

±0.735VREF

V

−20dBFS

±0.147VREF

V

Common-mode input voltage (VCM)

(AINP + AINN) / 2

2.0

V

Absolute input voltage

(AINP or AINN with respect to AGND)

0dBFS

−0.1

4.7

V

Absolute input voltage

(AINP or AINN with respect to AGND)

−2dBFS input and smaller

0.1

4.2

V

Dynamic Specifications

Data rate

1.25

f

CLK

40MHz

MSPS

fIN = 10kHz, −2dBFS

93

dB

fIN = 10kHz, −6dBFS

90

dB

fIN = 10kHz, −20dBFS

76

dB

fIN = 100kHz, −2dBFS

93

dB

Signal-to-noise ratio (SNR)

fIN = 100kHz, −6dBFS

90

dB

Signal-to-noise ratio (SNR)

fIN = 100kHz, −20dBFS

70

76

dB

fIN = 500kHz, −2dBFS

93

dB

fIN = 500kHz, −6dBFS

90

dB

fIN = 500kHz, −20dBFS

76

dB

fIN = 10kHz, −2dBFS

−101

dB

fIN = 10kHz, −6dBFS

−103

dB

fIN = 10kHz, −20dBFS

−96

dB

fIN = 100kHz, −2dBFS

−95

dB

Total harmonic distortion (THD)

fIN = 100kHz, −6dBFS

−101

dB

Total harmonic distortion (THD)

fIN = 100kHz, −20dBFS

−98

−90

dB

fIN = 500kHz, −2dBFS

−114

dB

fIN = 500kHz, −6dBFS

−110

dB

fIN = 500kHz, −20dBFS

−96

dB

fIN = 10kHz, −2dBFS

92

dB

fIN = 10kHz, −6dBFS

89

dB

fIN = 10kHz, −20dBFS

76

dB

fIN = 100kHz, −2dBFS

91

dB

Signal-to-noise and distortion (SINAD)

fIN = 100kHz, −6dBFS

89

dB

Signal-to-noise and distortion (SINAD)

fIN = 100kHz, −20dBFS

69

76

dB

fIN = 500kHz, −2dBFS

93

dB

fIN = 500kHz, −6dBFS

90

dB

fIN = 500kHz, −20dBFS

76

dB