charlie@oakhill.UUCP (Charlie Thompson) (10/27/88)
I guess this question is a good one for Dr. Max Hauser. I heard a *rumor* that Crystal Semiconductor is going to announce a stereo sigma delta A/D converter next week at the AES show in LA. Max or anybody know anything about this *rumor*? Hello linear phase anti- aliasing! - C.D.T.
bill@videovax.Tek.COM (William K. McFadden) (11/09/88)
In article <1619@radio.oakhill.UUCP> charlie@oakhill.UUCP (Charlie Thompson) writes: >I guess this question is a good one for Dr. Max Hauser. I heard >a *rumor* that Crystal Semiconductor is going to announce a stereo >sigma delta A/D converter next week at the AES show in LA. Max or >anybody know anything about this *rumor*? Hello linear phase anti- >aliasing! I just returned from AES. From the Crystal CS5326 data sheet: Features: o Complete Stereo A/D System Delta-Sigma A/D Converters Digital Anti-Alias Filtering S/H Circuitry and Voltage Reference o Adjustable System Sampling Rates 32 KHz, 44.1 KHz, 48 KHz [anti-alias filter automatically scales to sampling frequency] o Low Noise and Distortion 94 dB dynamic range 0.0015% THD o Internal 64X Oversampling o Linear Phase Digital Anti-Alias Filtering 0.001 dB Passband Ripple 86 dB Stopband Rejection o Low Power Dissipation: 500 mW Power-Down Mode for Portable Applications General Description: The CS5326 is a complete Analog-to-Digital converter for stereo digital audio systems. It performs sampling, analog-to-digital conversion and anti-aliasing filtering, generating 16-bit values for both left and right inputs in serial form. The CS5326's output word rate can be up to 50 KHz per channel. The CS5326 uses delta-sigma modulation to achieve high performance. Oversampling, followed by digital filtering and decimation, greatly eases external alti-alias filter requirements. [I'll say, in the typical connection diagram, the external anti-aliasing filter is a .01uF capacitor and a 51 ohm resistor!] The CS5326 oversamples at 64X the output word rate and uses a 3-stage digital FIR filter to achieve 94dB Signal-to-Noise Ratio and 0.0015% THD over a 10 Hz to 22 KHz bandwidth. The FIR filters offer linear phase, 0.001 dB passband ripple [!], and >86 dB stopband rejection. The CS5326 is packaged in a 0.6" wide 28-pin plastic DIP. Powered from +/- 5V supplies, the CS5326 dissipates 500 mW, and includes a power-down mode for battery powered applications. Analog Characteristics (Ta = 25 C, Full-Scale Input Sinewave, 1 KHz, 48 KHz output word rate) Resolution: min 16 bits Signal-to-(Noise + Distortion): typ 92 dB, 10Hz to 22 KHz THD: max 0.003% typ 0.0015%, Vin = +/- full-scale typ 0.001%, Vin = -20 dB Dynamic Range: min 93 dB, typ 94 dB Interchannel Phase Deviation: typ 0.0001 degrees [!] Interchannel Isolation at 20 KHz: typ 105 dB Interchannel Gain Mismatch: typ 0.05 dB Gain Error: max +/- 5% [due to on-chip voltage reference, I'm told] Gain Drift: typ 150 ppm/degree C [ditto] Offset Error (after calibrtion): +/- 15 LSB [has on-chip offset calibration mode. will also cal out offset of driving source] Input Voltage Range: +/- 3.6 V for full-scale output [Differential Nonlinearity is essentially zero because of the one-bit sampler in the front-end. A plot in the data sheet shows it to be within 1/4 LSB over the entire range of the converter. The typical connection diagram shows external components consist of 11 capicators (mostly for power supply decoupling), 3 resistors, 1 inductor (decoupling), and a clock source. That's all that's needed for a complete stereo converter.] -- Bill McFadden Tektronix, Inc. P.O. Box 500 MS 58-639 Beaverton, OR 97077 UUCP: bill@videovax.Tek.COM, {hplabs,uw-beaver,decvax}!tektronix!videovax!bill GTE: (503) 627-6920 Funniest new cartoon title: Teenage Mutant Ninja Turtles
smadi@rlgvax.UUCP (Smadi Paradise) (11/09/88)
Sounds great (no pun intended). Does anybody have prices (one off)? On
bill@videovax.Tek.COM (William K. McFadden) (11/11/88)
In article <1026@rlgvax.UUCP> smadi@rlgvax.UUCP (On Paradise) writes: >Sounds great (no pun intended). Does anybody have prices (one off)? They said it would cost $48 in 1000s. The unit price will most certainly be a lot higher. I know somebody is going to ask about availability, so I'll just tell you. Samples are supposed to be available by the end of first quarter 89, will full production by mid-year. -- Bill McFadden Tektronix, Inc. P.O. Box 500 MS 58-639 Beaverton, OR 97077 UUCP: bill@videovax.Tek.COM, {hplabs,uw-beaver,decvax}!tektronix!videovax!bill GTE: (503) 627-6920 Funniest new cartoon title: Teenage Mutant Ninja Turtles
todd@ivucsb.UUCP (Todd Day) (11/13/88)
In article <5303@videovax.Tek.COM> bill@videovax.Tek.COM (William K. McFadden) writes:
_I just returned from AES. From the Crystal CS5326 data sheet:
_
_Features:
_
_ o Complete Stereo A/D System
_ Delta-Sigma A/D Converters
_ Digital Anti-Alias Filtering
_ S/H Circuitry and Voltage Reference
Are they going to do a D/A also?
/| Todd Day (805)968-9352 |\ "(sniff) (sniff) I think I smell a SNAPPER!"
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\| Isla Vista, CA 93117 |/ todd@ivucsb.UUCPbill@videovax.Tek.COM (William K. McFadden) (11/16/88)
In article <383@ivucsb.UUCP> todd@ivucsb.UUCP (Todd Day) writes: >Are they going to do a D/A also? Crystal does not list any D/A converters in its data book and did not have any at the show. I think they have left D/A to Burr-Brown and have gone after the more lucrative A/D market (in my opinion, of course). -- Bill McFadden Tektronix, Inc. P.O. Box 500 MS 58-639 Beaverton, OR 97077 UUCP: bill@videovax.Tek.COM, {hplabs,uw-beaver,decvax}!tektronix!videovax!bill GTE: (503) 627-6920 Funniest new cartoon title: Teenage Mutant Ninja Turtles