AD1895 datasheet(2/24 Pages) AD

2 / 24 page

REV. B

–2–

AD1895–SPECIFICATIONS

TEST CONDITIONS, UNLESS OTHERWISE NOTED.

Supply Voltages

VDD_CORE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 V

VDD_IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.0 V or 3.3 V

Ambient Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

°C

Input Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30.0 MHz

Input Signal . . . . . . . . . . . . . . . . . . . . . . . . . .

1.000 kHz, 0 dBFS

Measurement Bandwidth . . . . . . . . . . . . . . . . . . 20 to fS_OUT/2 Hz

Word Width

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Bits

Load Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 pF

Input Voltage High . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 V

Input Voltage Low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8 V

DIGITAL PERFORMANCE (VDD_CORE = 3.3 V

5%, VDD_IO = 5.0 V

10%)

Parameter

Min

Typ

Max

Unit

RESOLUTION

Bits

SAMPLE RATE @ MCLK_IN = 30 MHz

215

kHz

SAMPLE RATE (@ OTHER MASTER CLOCKS)

MCLK_IN/5000

≤ f

S_MAX < MCLK_IN/138

kHz

SAMPLE RATE RATIOS

Upsampling

1:8

Downsampling

7.75:1

DYNAMIC RANGE

(20 Hz to fS_OUT/2, 1 kHz, –60 dBFS Input) A-Weighted

44.1 kHz: 48 kHz

128

48 kHz: 44.1 kHz

128

48 kHz: 96 kHz

128

44.1 kHz: 192 kHz

128

96 kHz: 48 kHz

127

192 kHz: 32 kHz

127

(20 Hz to fS_OUT/2, 1 kHz, –60 dBFS Input) No Filter

44.1 kHz: 48 kHz

125

48 kHz: 44.1 kHz

125

48 kHz: 96 kHz

125

44.1 kHz: 192 kHz

125

96 kHz: 48 kHz

124

192 kHz: 32 kHz

124

TOTAL HARMONIC DISTORTION + NOISE

(20 Hz to fS_OUT/2, 1 kHz, 0 dBFS Input) No Filter

Worst-Case (48 kHz: 96 kHz)

–115

44.1 kHz: 48 kHz

–120

48 kHz: 44.1 kHz

–119

48 kHz: 96 kHz

–118

44.1 kHz: 192 kHz

–120

96 kHz: 48 kHz

–122

192 kHz: 32 kHz

–122

INTERCHANNEL GAIN MISMATCH

0.0

INTERCHANNEL PHASE DEVIATION

0.0

Degrees

MUTE ATTENUATION (24 BITS WORD WIDTH)(A-WEIGHT)

–127

NOTES

1Lower sampling rates than those given by this formula are possible, but the jitter rejection will decrease.

2Refer to the Typical Performance Characteristics section for DNR and THD + N numbers over a wide range of input and output sample rates.

3For any other ratio, minimum THD + N will be better than –115 dB. Please refer to detailed performance plots.

Specifications subject to change without notice.

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