ADS1605

ADS1606

SBAS274E − MARCH 2003 − REVISED JUNE 2004

www.ti.com

3

ELECTRICAL CHARACTERISTICS

All specifications at −40

°C to +85°C, AVDD = 5V, DVDD = IOVDD = 3V, fCLK = 40MHz, External VREF = +3V, 2XMODE = low, VCM = 2.0V,

FIFO disabled, and RBIAS = 37kΩ, unless otherwise noted.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Analog Input

0dBFS

±1.545VREF

V

Differential input voltage (VIN)

(AINP − AINN)

−2dBFS

±1.227VREF

V

Differential input voltage (VIN)

(AINP − AINN)

−6dBFS

±0.774VREF

V

−20dBFS

±0.155VREF

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

5.0

f

CLK

40MHz

MSPS

fIN = 100kHz, −2dBFS

88

dB

fIN = 100kHz, −6dBFS

84

dB

fIN = 100kHz, −20dBFS

62

70

dB

fIN = 500kHz, −2dBFS

86

dB

Signal−to−noise ratio (SNR)

fIN = 500kHz, −6dBFS

83

dB

Signal−to−noise ratio (SNR)

fIN = 500kHz, −20dBFS

69

dB

fIN = 2MHz, −2dBFS

84

dB

fIN = 2MHz, −6dBFS

82

dB

fIN = 2MHz, −20dBFS

69

dB

fIN = 100kHz, −2dBFS

−93

dB

fIN = 100kHz, −6dBFS

−99

dB

fIN = 100kHz, −20dBFS

−94

−85

dB

fIN = 500kHz, −2dBFS

−94

dB

Total harmonic distortion (THD)

fIN = 500kHz, −6dBFS

−97

dB

Total harmonic distortion (THD)

fIN = 500kHz, −20dBFS

−93

dB

fIN = 2MHz, −2dBFS

−98

dB

fIN = 2MHz, −6dBFS

−101

dB

fIN = 2MHz, −20dBFS

−92

dB

fIN = 100kHz, −2dBFS

86

dB

fIN = 100kHz, −6dBFS

84

dB

fIN = 100kHz, −20dBFS

62

70

dB

fIN = 500kHz, −2dBFS

86

dB

Signal−to−noise and distortion (SINAD)

fIN = 500kHz, −6dBFS

83

dB

Signal−to−noise and distortion (SINAD)

fIN = 500kHz, −20dBFS

69

dB

fIN = 2MHz, −2dBFS

84

dB

fIN = 2MHz, −6dBFS

82

dB

fIN = 2MHz, −20dBFS

69

dB