Document
SM5876AM
NIPPON PRECISION CIRCUITS INC.
3rd-order Σ∆, 2-channel D/A Converter
OVERVIEW
The SM5876AM is a 3rd-order Σ∆, 2-channel D/A converter LSI for CD-ROM digital audio reproduction equipment. It incorporates an 8-times oversampling digital filter, deemphasis filter, attenuator, and soft mute circuits built-in., using NPC’s Molybdenum-gate CMOS technology. The SM5876AM operates from a 2.7 to 5.5 V supply, and is available in 24-pin SSOPs.
PINOUT
MLEN CKSL CKO DVSS BCKI DI DVDD LRCI TSTN LO AVDDL LON
1 24
FEATURES
s
s s s
s
s
s s
s
s
s s
s s
System clock • 768fs (33.8688MHz) • 384fs (16.9344MHz) Crystal oscillator circuit built-in Infinity-zero detector circuit built-in MSB first, rear-packed serial data input format (≤ 64fs bit clock) 8-times oversampling digital filter • 32 dB stopband attenuation • ±0.05 dB passband ripple • −0.34 dB passband correction for 70 kHz LPF 3-line microcontroller interface for output mode and attenuator control settings 16 output modes Deemphasis filter operation • 36 dB stopband attenuation • −0.09 to +0.23 dB deviation • −0.34 dB passband correction for 70 kHz LPF Attenuator • 8-bit attenuator (linear 256 steps) • Independent left/right-channel set function • Soft mute function (approx. 1024/fs mute time) Σ∆ 2-channel D/A converter • 3rd-order noise shaper • 32fs oversampling 44.1 kHz sampling frequency 2.7 to 5.5 V operating supply voltage range (4.5 to 5.5 V operating supply voltage range with 768fs system clock) 24-pin SSOP Molybdenum-gate CMOS process
12
13
MCK MDT RSTN MUTEO XVSS XTO XTI XVDD RO AVDDR RON AVSS
PACKAGE DIMENSIONS
Unit: mm
S M5 8 7 6 AM
24-pin SSOP
5.40 0.20 7.80 0.30
10.05 0.20 10.20 0.30 1.80 0.10
0.15 − 0.05
+ 0.1
0.10 0.10 2.10MAX
0.7
0.8
0.36 0.10
0.50 0.20
0 10
NIPPON PRECISION CIRCUITS—1
SM5876AM
BLOCK DIAGRAM
LRCI BCKI DI
Input interface
MLEN MCK MDT L R
MUTEO
Microcontroller interface
Filter & attenuation operation block
L R CKO XVSS XTO
RSTN CKSL DVSS DVDD TSTN
Timing control
L
PWM data generation block
R
Noise shaper operation block
XTI
XVDD
AVDDL
AVDDR
LO
LON
AVSS
RON
RO
PIN DESCRIPTION
Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Name MLEN CKSL CKO DVSS BCKI DI DVDD LRCI TSTN LO AVDDL LON AVSS RON O O Ip Ip O Ip Ip I/O Ip Ip O Microcontroller control latch clock input 768fs/384fs clock select. 768fs when HIGH, and 384fs when LOW. Oscillator clock buffer output Digital ground pin Data bit clock input pin Serial data input pin Digital supply pin Sample data rate (fs) clock input pin. Left channel when HIGH, and right channel when LOW. Test input pin Left-channel analog output (+) Left-channel analog supply pin Left-channel analog output (−) Analog ground pin Right-channel analog output (−) Description
NIPPON PRECISION CIRCUITS—2
SM5876AM
Number 15 16 17 18 19 20 21 22 23 24 Name AVDDR RO XVDD XTI XTO XVSS MUTEO RSTN MDT MCK O Ip Ip Ip I O O I/O Right-channel analog supply pin Right-channel analog output (+) Crystal oscillator supply pin Crystal oscillator or external clock input pin Crystal oscillator output pin Crystal oscillator ground pin Infinity-zero detector output (analog mute control) Reset pin. Reset when LOW. Microcontroller control data input pin Microcontroller control clock input pin Description
I: INPUT O: OUTPUT Ip: Input with pull-up Registor
SPECIFICATIONS
Absolute Maximum Ratings
DVSS = AVSS = XVSS = 0 V, AVDD = AVDDL = AVDDR
Parameter Supply voltage range Input voltage range1 XTI input voltage range Storage temperature range Power dissipation Soldering temperature Soldering time 1. Pins MLEN, CKSL, BCKI, DI, LRCI, TSTN, MCK, MDT. Also applicable during supply switching. Symbol DV DD, AV DD, XVDD V IN1 V IN Tstg PD Tsld tsld Rating −0.3 to 7.0 DV SS − 0.3 to DV DD + 0.3 XV SS − 0.3 to XVDD + 0.3 −40 to 125 250 255 10 Unit V V V °C mW °C s
Recommended Operating Conditions
5 V operation: DVSS = AVSS = XVSS = 0 V, AVDD = AVDDL = AVDDR
Parameter Supply voltage range Symbol DV DD, AV DD, XVDD DV DD − XVDD, DV DD − AV DD, XV DD − AV DD, DV SS − XVSS, DV SS − AV SS, XV SS − AV SS Topr Rating 4.5 to 5.5 Unit V
Supply voltage variation
±0.1
V
Operating temperature range
−40 to 85
°C
NIPPON PRECISION CIRCUITS—3
SM5876AM 3 V operation: DVSS = AVSS = XVSS = 0 V, AVDD = AVDDL = AVDDR, CKSL = LOW (384fs)
Parameter Supply voltage range Symbol DV DD, AV DD, XVDD DV DD − XVDD, DV DD − AV DD, XV DD − AV DD, DV SS − XVSS, DV SS − AV SS, XV SS − AV SS Topr Rating 2.7 to 4.5 Unit V
Supply voltage variation
±0.1
V
Operating temperature range
−20 to 70
°C
DC Electrical Characteristics
5 V operation: DVSS = AVSS = XVSS = 0 V, DVDD = AVDD = XVDD = 4.5 to 5.5 V, AVDD = AVDDL = AVDDR, Ta = −40 to 85 °C
Rating Parameter DVDD digital supply current1 XVDD system clock supply current1 Symbol IDDD IDDX IDDA V IH1 V IL1 V INAC V IH2 V IL2 VOHA VOLA VOHC VOLC IIH1 IIL1 IIL2 ILH IOH = −1 mA IOL = 1 mA IOH = −1 mA IOL = 1 mA V IN = XVDD V IN = 0 V V IN = 0 V V IN = DV DD Total current Clock input Clock.