SAA7360 Datasheet, PDF (11/20 Pages) NXP Semiconductors – Bitstream conversion ADC for digital audio systems

Philips Semiconductors
Bitstream conversion ADC
for digital audio systems
Product specification
SAA7360
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Analog part
VOLTAGE REFERENCE V_refL AND V_refR
V_I
input voltage
Current reference I_ref (note 11)
I_O
output current
2.0
2.3
2.7
V
−
1--V--3--^r--e-k--f-Ω^R---
−
A
DAC reference
INPUT V_DACN
V_I
input voltage
INPUT V_DACP
V_I
input voltage
−
V_SSA
−
V
−
V_DDA
−
V
Sigma-Delta modulator inputs PINR, NINR, PINL and NINL
V_I(rms)
input voltage (RMS value)
note 12
−
1
−
V
ADC performance (note 13)
THD + N
DR
α_cs
G
t_gd
total harmonic
distortion + noise
dynamic range
channel separation
gain
group delay (in pass band)
at −1 dB digital output; −
note 14
note 14
93
f_i = 1 kHz; note 15
−
−1.5
note 16
−
−90
(0.003%)
97
100
−1
1.25
−85
dB
(0.0056%)
−
dB
−
dB
−0.5
dB
−
ms
Notes
1. Minimum V_IL, V_OL and maximum V_IH, V_OH are peak values to allow for transients.
2. I_LI minimum and I_LO minimum measured at V_I = 0 V; I_LI maximum and I_LO maximum measured at V_I = V_DDD.
3. f_xtal is a multiple of the system sampling frequency f_s which can vary between 18 and 53 kHz.
4. Output times are measured with a capacitive load of 35 pF; XSYS2 is the master clock frequency divided by 2.
5. t_H valid only when used with XTAL, with 50% input mark space ratio; XSYS1 (t_H) is measured at ¹â„₂V_DDD.
6. Output times are measured with a capacitive load of 20 pF.
7. Output times are measured with a capacitive load of 50 pF.
8. Relative to SCKO in master mode.
9. In slave mode the number of SCKI clocks in each channel should be <33 and the same in both. The polarity of SWSI
indicates left/right channel.
10. Relative to SCKI in slave mode.
11. I_ref connected to 0 V via a 13 kΩ resistor.
12. The maximum recommended input voltage (referred to as 0 dB) yields a −1 dB output (relative to full-scale digital
swing). The input voltage scales with V(V_DACP) − V(V_DACN); almost equal to V_DDA, hence:
V_I (0 dB) = --^[--V------⁽--V----^D----^A---^C----^P---⁾-----5^–----V------⁽--V-----^D---^A----^C---^N----⁾---^]- V (RMS value)
13. Device measured with external components as shown in recommended application diagram (see Fig.7).
1995 Apr 24
11