JAJSFI3A データシート

JAJSFI3A May 2018 – November 2018 TAS3251

PRODUCTION DATA.

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）

DKQ|56
- MPDS378A

サーマルパッド・メカニカル・データ

DKQ|56
- PPTD343

発注情報

jajsfi3a_oa

8.3.4.3.2.1 Examples:

If K = 8.5, then J = 8, D = 5000
If K = 7.12, then J = 7, D = 1200
If K = 14.03, then J = 14, D = 0300
If K = 6.0004, then J = 6, D = 0004

When the PLL is enabled and D = 0000, the following conditions must be satisfied:

1 MHz ≤ ( PLLCKIN / P ) ≤ 20 MHz
64 MHz ≤ (PLLCKIN x K x R / P ) ≤ 100 MHz
1 ≤ J ≤ 63

When the PLL is enabled and D ≠ 0000, the following conditions must be satisfied:

6.667 MHz ≤ PLLCLKIN / P ≤ 20 MHz
64 MHz ≤ (PLLCKIN x K x R / P ) ≤ 100 MHz
4 ≤ J ≤ 11
R = 1

When the PLL is enabled,

f_S = (PLLCLKIN × K × R) / (2048 × P)
The value of N is selected so that f_S × N = PLLCLKIN x K x R / P is in the allowable range.

Example: MCLK = 12 MHz and f_S = 44.1 kHz, (N=2048)

Select P = 1, R = 1, K = 7.5264, which results in J = 7, D = 5264

Example: MCLK = 12 MHz and f_S = 48.0 kHz, (N=2048)

Select P = 1, R = 1, K = 8.192, which results in J = 8, D = 1920

Values are written to the registers in Table 5.

Table 5. PLL Registers

DIVIDER	FUNCTION	BITS
PLLE	PLL enable	P0-R4, [0]
PPDV	PLL P	P0-R20, [3:0]
PJDV	PLL J	P0-R21, [5:0]
PDDV	PLL D	P0-R22, [5:0]
PDDV	PLL D	P0-R23, [7:0]
PRDV	PLL R	P0-R24, [3:0]

Table 6. PLL Configuration Recommendations

EQUATIONS	DESCRIPTION
f_S (kHz)	Sampling frequency
R_MCLK	Ratio between sampling frequency and MCLK frequency (MCLK frequency = RMCLK x sampling frequency)
MCLK (MHz)	System master clock frequency at MCLK input (pin 20)
PLL VCO (MHz)	PLL VCO frequency as PLLCK in Figure 22
P	One of the PLL coefficients in Equation 1
PLL REF (MHz)	Internal reference clock frequency which is produced by MCLK / P
M = K × R	The final PLL multiplication factor computed from K and R as described in Equation 1
K = J.D	One of the PLL coefficients in Equation 1
R	One of the PLL coefficients in Equation 1
PLL f_S	Ratio between f_S and PLL VCO frequency (PLL VCO / f_S)
DSP f_S	Ratio between operating clock rate and f_S (PLL f_S / NMAC)
NMAC	The clock divider value in Table 4
DSP CLK (MHz)	The operating frequency as DSPCK in Figure 22
MOD f_S	Ratio between DAC operating clock frequency and f_S (PLL f_S / NDAC)
MOD f (kHz)	DAC operating frequency as DACCK in
NDAC	DAC clock divider value in Table 4
DOSR	OSR clock divider value in Table 4 for generating OSRCK in Figure 22. DOSR must be chosen so that MOD f_S / DOSR = 16 for correct operation.
NCP	NCP (negative charge pump) clock divider value in Table 4
CP f	Negative charge pump clock frequency (f_S × MOD f_S / NCP)
% Error	Percentage of error between PLL VCO / PLL f_S and f_S (mismatch error). This value is typically zero but can be non-zero especially when K is not an integer (D is not zero). This value can be non-zero only when the TAS3251 device acts as a master.

The previous equations explain how to calculate all necessary coefficients and controls to configure the PLL. Table 7 provides for easy reference to the recommended clock divider settings for the PLL as a Master Clock.

Table 7. Recommended Clock Divider Settings for PLL as Master Clock

f_S (kHz)	R_MCLK	MCLK (MHz)	PLL VCO (MHz)	P	PLL REF (MHz)	M = K×R	K = J×D	R	PLL f_S	DSP f_S	NMAC	DSP CLK (MHz)	MOD f_S	MOD f (kHz)	NDAC	DOSR	NCP	CP f (kHz)
8	128	1.024	98.304	1	1.024	96	48	2	12288	1024	12	8.192	768	6144	16	48	4	1536
	192	1.536	98.304	1	1.536	64	32	2	12288	1024	12	8.192	768	6144	16	48	4	1536
	256	2.048	98.304	1	2.048	48	48	1	12288	1024	12	8.192	768	6144	16	48	4	1536
	384	3.072	98.304	3	1.024	96	48	2	12288	1024	12	8.192	768	6144	16	48	4	1536
	512	4.096	98.304	3	1.365	72	36	2	12288	1024	12	8.192	768	6144	16	48	4	1536
	768	6.144	98.304	3	2.048	48	48	1	12288	1024	12	8.192	768	6144	16	48	4	1536
	1024	8.192	98.304	3	2.731	36	36	1	12288	1024	12	8.192	768	6144	16	48	4	1536
	1152	9.216	98.304	9	1.024	96	48	2	12288	1024	12	8.192	768	6144	16	48	4	1536
	1536	12.288	98.304	9	1.365	72	36	2	12288	1024	12	8.192	768	6144	16	48	4	1536
	2048	16.384	98.304	9	1.82	54	54	1	12288	1024	12	8.192	768	6144	16	48	4	1536
	3072	24.576	98.304	9	2.731	36	36	1	12288	1024	12	8.192	768	6144	16	48	4	1536
11.025	128	1.4112	90.3168	1	1.411	64	32	2	8192	1024	8	11.2896	512	5644.8	16	32	4	1411.2
	192	2.1168	90.3168	3	0.706	128	32	4	8192	1024	8	11.2896	512	5644.8	16	32	4	1411.2
	256	2.8224	90.3168	1	2.822	32	32	1	8192	1024	8	11.2896	512	5644.8	16	32	4	1411.2
	384	4.2336	90.3168	3	1.411	64	32	2	8192	1024	8	11.2896	512	5644.8	16	32	4	1411.2
	512	5.6448	90.3168	3	1.882	48	48	1	8192	1024	8	11.2896	512	5644.8	16	32	4	1411.2
	768	8.4672	90.3168	3	2.822	32	32	1	8192	1024	8	11.2896	512	5644.8	16	32	4	1411.2
	1024	11.2896	90.3168	3	3.763	24	24	1	8192	1024	8	11.2896	512	5644.8	16	32	4	1411.2
	1152	12.7008	90.3168	9	1.411	64	32	2	8192	1024	8	11.2896	512	5644.8	16	32	4	1411.2
	1536	16.9344	90.3168	9	1.882	48	48	1	8192	1024	8	11.2896	512	5644.8	16	32	4	1411.2
	2048	22.5792	90.3168	9	2.509	36	36	1	8192	1024	8	11.2896	512	5644.8	16	32	4	1411.2
	3072	33.8688	90.3168	9	3.763	24	24	1	8192	1024	8	11.2896	512	5644.8	16	32	4	1411.2
16	64	1.024	98.304	1	1.024	96	48	2	6144	1024	6	16.384	384	6144	16	24	4	1536
	128	2.048	98.304	1	2.048	48	48	1	6144	1024	6	16.384	384	6144	16	24	4	1536
	192	3.072	98.304	1	3.072	32	32	1	6144	1024	6	16.384	384	6144	16	24	4	1536
	256	4.096	98.304	1	4.096	24	24	1	6144	1024	6	16.384	384	6144	16	24	4	1536
	384	6.144	98.304	3	2.048	48	48	1	6144	1024	6	16.384	384	6144	16	24	4	1536
	512	8.192	98.304	3	2.731	36	36	1	6144	1024	6	16.384	384	6144	16	24	4	1536
	768	12.288	98.304	3	4.096	24	24	1	6144	1024	6	16.384	384	6144	16	24	4	1536
	1024	16.384	98.304	3	5.461	18	18	1	6144	1024	6	16.384	384	6144	16	24	4	1536
	1152	18.432	98.304	3	6.144	16	16	1	6144	1024	6	16.384	384	6144	16	24	4	1536
	1536	24.576	98.304	9	2.731	36	36	1	6144	1024	6	16.384	384	6144	16	24	4	1536
	2048	32.768	98.304	9	3.641	27	27	1	6144	1024	6	16.384	384	6144	16	24	4	1536
	3072	49.152	98.304	9	5.461	18	18	1	6144	1024	6	16.384	384	6144	16	24	4	1536
22.05	64	1.4112	90.3168	1	1.411	64	32	2	4096	1024	4	22.5792	256	5644.8	16	16	4	1411.2
	128	2.8224	90.3168	1	2.822	32	32	1	4096	1024	4	22.5792	256	5644.8	16	16	4	1411.2
	192	4.2336	90.3168	3	1.411	64	32	2	4096	1024	4	22.5792	256	5644.8	16	16	4	1411.2
	256	5.6448	90.3168	1	5.645	16	16	1	4096	1024	4	22.5792	256	5644.8	16	16	4	1411.2
	384	8.4672	90.3168	3	2.822	32	32	1	4096	1024	4	22.5792	256	5644.8	16	16	4	1411.2
	512	11.2896	90.3168	3	3.763	24	24	1	4096	1024	4	22.5792	256	5644.8	16	16	4	1411.2
	768	16.9344	90.3168	3	5.645	16	16	1	4096	1024	4	22.5792	256	5644.8	16	16	4	1411.2
	1024	22.5792	90.3168	3	7.526	12	12	1	4096	1024	4	22.5792	256	5644.8	16	16	4	1411.2
	1152	25.4016	90.3168	9	2.822	32	32	1	4096	1024	4	22.5792	256	5644.8	16	16	4	1411.2
	1536	33.8688	90.3168	9	3.763	24	24	1	4096	1024	4	22.5792	256	5644.8	16	16	4	1411.2
	2048	45.1584	90.3168	9	5.018	18	18	1	4096	1024	4	22.5792	256	5644.8	16	16	4	1411.2
32	32	1.024	98.304	1	1.024	96	48	2	3072	1024	3	32.768	192	6144	16	12	4	1536
	48	1.536	98.304	1	1.536	64	16	4	3072	1024	3	32.768	192	6144	16	12	4	1536
	64	2.048	98.304	1	2.048	48	24	2	3072	1024	3	32.768	192	6144	16	12	4	1536
	128	4.096	98.304	1	4.096	24	24	1	3072	1024	3	32.768	192	6144	16	12	4	1536
	192	6.144	98.304	3	2.048	48	48	1	3072	1024	3	32.768	192	6144	16	12	4	1536
	256	8.192	98.304	2	4.096	24	24	1	3072	1024	3	32.768	192	6144	16	12	4	1536
	384	12.288	98.304	3	4.096	24	24	1	3072	1024	3	32.768	192	6144	16	12	4	1536
	512	16.384	98.304	3	5.461	18	18	1	3072	1024	3	32.768	192	6144	16	12	4	1536
	768	24.576	98.304	3	8.192	12	12	1	3072	1024	3	32.768	192	6144	16	12	4	1536
	1024	32.768	98.304	3	10.923	9	9	1	3072	1024	3	32.768	192	6144	16	12	4	1536
	1152	36.864	98.304	9	4.096	24	24	1	3072	1024	3	32.768	192	6144	16	12	4	1536
	1536	49.152	98.304	6	8.192	12	12	1	3072	1024	3	32.768	192	6144	16	12	4	1536
44.1	32	1.4112	90.3168	1	1.411	64	32	2	2048	1024	2	45.1584	128	5644.8	16	8	4	1411.2
	64	2.8224	90.3168	1	2.822	32	16	2	2048	1024	2	45.1584	128	5644.8	16	8	4	1411.2
	128	5.6448	90.3168	1	5.645	16	16	1	2048	1024	2	45.1584	128	5644.8	16	8	4	1411.2
	192	8.4672	90.3168	3	2.822	32	32	1	2048	1024	2	45.1584	128	5644.8	16	8	4	1411.2
	256	11.2896	90.3168	2	5.645	16	16	1	2048	1024	2	45.1584	128	5644.8	16	8	4	1411.2
	384	16.9344	90.3168	3	5.645	16	16	1	2048	1024	2	45.1584	128	5644.8	16	8	4	1411.2
	512	22.5792	90.3168	3	7.526	12	12	1	2048	1024	2	45.1584	128	5644.8	16	8	4	1411.2
	768	33.8688	90.3168	3	11.29	8	8	1	2048	1024	2	45.1584	128	5644.8	16	8	4	1411.2
	1024	45.1584	90.3168	3	15.053	6	6	1	2048	1024	2	45.1584	128	5644.8	16	8	4	1411.2
48	32	1.536	98.304	1	1.536	64	32	2	2048	1024	2	49.152	128	6144	16	8	4	1536
	64	3.072	98.304	1	3.072	32	16	2	2048	1024	2	49.152	128	6144	16	8	4	1536
	128	6.144	98.304	1	6.144	16	16	1	2048	1024	2	49.152	128	6144	16	8	4	1536
	192	9.216	98.304	3	3.072	32	32	1	2048	1024	2	49.152	128	6144	16	8	4	1536
	256	12.288	98.304	2	6.144	16	16	1	2048	1024	2	49.152	128	6144	16	8	4	1536
	384	18.432	98.304	3	6.144	16	16	1	2048	1024	2	49.152	128	6144	16	8	4	1536
	512	24.576	98.304	3	8.192	12	12	1	2048	1024	2	49.152	128	6144	16	8	4	1536
	768	36.864	98.304	3	12.288	8	8	1	2048	1024	2	49.152	128	6144	16	8	4	1536
	1024	49.152	98.304	3	16.384	6	6	1	2048	1024	2	49.152	128	6144	16	8	4	1536
96	32	3.072	98.304	1	3.072	32	16	2	1024	512	2	49.152	64	6144	16	4	4	1536
	48	4.608	98.304	3	1.536	64	32	2	1024	512	2	49.152	64	6144	16	4	4	1536
	64	6.144	98.304	1	6.144	16	8	2	1024	512	2	49.152	64	6144	16	4	4	1536
	128	12.288	98.304	2	6.144	16	16	1	1024	512	2	49.152	64	6144	16	4	4	1536
	192	18.432	98.304	3	6.144	16	16	1	1024	512	2	49.152	64	6144	16	4	4	1536
	256	24.576	98.304	4	6.144	16	16	1	1024	512	2	49.152	64	6144	16	4	4	1536
	384	36.864	98.304	6	6.144	16	16	1	1024	512	2	49.152	64	6144	16	4	4	1536
	512	49.152	98.304	8	6.144	16	16	1	1024	512	2	49.152	64	6144	16	4	4	1536