PCM1850 datasheet(6/33 Pages) TI1

Part #	PCM1850

Description	6 2-CHANNEL MUX AND PGA

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Manufacturer	TI1 [Texas Instruments]

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PCM1850

PCM1851

SLES108 − MARCH 2004

www.ti.com

6

ELECTRICAL CHARACTERISTICS (Continued)

All specifications at TA = 25°C, VCC = 5 V, VDD = 3.3 V, master mode, fS = 48 kHz, system clock = 256 fS, 24-bit data, unless otherwise noted

PARAMETER

TEST CONDITIONS

PCM1850PJT, PCM1851PJT

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

OUTPUT LOGIC

VOH (1)

Output logic level

IOUT = –4 mA

2.8

VDC

VOL(1) (2)

Output logic level

IOUT = 4 mA

0.5

VDC

AFE MULTIPLEXER

Input channels

6

Input level for full scale

2

2.4

Vrms

Center voltage (VREF1)

Selected channel

0.5 VCC

V

Center voltage (VREFS)

Unselected channel

0.5 VCC

V

Input impedance

Selected channel

50

169

k

Ω

Input impedance

Unselected channel

50

57

k

Ω

AFE PGA

Gain range

–11

0

11

dB

Gain step

0.5

dB

Monotonicity

Specified

Antialiasing filter frequency response

–3 dB, PGA gain = –5.5 dB

300

kHz

MONITOR OUTPUT

Output level for full scale

AC-coupled, >10 k

Ω

0.6 VCC

Vp-p

Output load

AC-coupled

10

k

Ω

THD+N (3) (4)

AC-coupled, 10 k

Ω, 3 Vp-p output,

0.0016%

S/N ratio (3) (4)

AC-coupled, 10 k

Ω

104

dB

Gain error (3) (4)

AC-coupled, 10 k

Ω

–3

% of FSR

Center voltage

0.5 VCC

V

ADC

Resolution

24

bits

Full scale input voltage

0.6 VCC

Vp-p

ACCURACY

Gain mismatch, channel-to-channel

±1

±3

% of FSR

Gain error

±2

±5

% of FSR

Bipolar zero error

High-pass filter bypass

±2

% of FSR

(1) Pins 1–4: LRCK, BCK (in master mode), DOUT, OVER

(2) Pin 32: SDA (PCM1851) (open-drain LOW output)

(3) Analog performance specifications are tested with the System Two™ audio measurement system by Audio Precision™, using a 400-Hz HPF and

20-kHz LPF in the RMS mode at fIN = 1 kHz.

(4) Reference level (0 dB) is specified as 2-V rms input on VINL[1:6] and VINR[1:6] pins with PGA gain of –5.5 dB.

Audio Precision and System Two are trademarks of Audio Precision, Inc.

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