MSP430F435IPZ datasheet(65/85 Pages) TI

65 / 85 page

MSP430x43x, MSP430x44x

MIXED SIGNAL MICROCONTROLLER

SLAS344A – JANUARY 2002 – REVISED FEBRUARY 2002

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

timing requirements

12-bit ADC, timing parameters

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

ts(REF_ON)†

Settle time of internal

reference voltage (see

Figure 24 and Note 1)

I(VREF+) = 0.5 mA, C(VREF+) = 10 µF,

VREF+ = 1.5 V, V(AVCC) = 2.2 V

ADC12DIV=0 [f(ADC12CLK) =

2 2 V/3 V

f(ADC12OSC)

ADC12DIV=0 [f(ADC12CLK) =

f(ADC12OSC)]

VCC = 2.2 V/3 V

3.7

6.3

MHz

Con ersion time

AVCC(min)≤V(AVCC)≤AVCC(max),

C(VREF+) ≥ 5µF, internal oscillator,

fOSC = 3.7 MHz to 6.3 MHz

VCC = 2.2 V/3 V

2.06

3.51

µs

Conversion time

AVCC(min) ≤ V(AVCC) ≤ AVCC(max),

External fADC12(CLK) from ACLK or MCLK or SMCLK:

ADC12SSEL

≠ 0

×ADC12DIV×

1/fADC12(CLK)

µs

ts(ADC12ON)‡ Settle time of the ADC

AVCC(min) ≤ V(AVCC) ≤ AVCC(max) (see Note 2)

100

t(S

l )

‡

Sampling time

V(AVCC_min) < V(AVCC) <

V(AVCC_max)

Ri(source) = 400 Ω, Zi = 1000 Ω,

VCC = 3 V

1220

t(Sample)‡

Sampling time

Ri(source) = 400 Ω, Zi = 1000 Ω,

Ci = 30 pF

τ = [Ri(source) x+ Zi] x Ci,

(see Note 3)

VCC = 2.2 V

1400

† Not production tested, limits characterized

‡ Not production tested, limits verified by design

NOTES:

1. The condition is that the error in a conversion started after ts(REF_ON) is less than ±0.5 LSB. The settling time depends on the external

capacitive load.

2. The condition is that the error in a conversion started after ts(ADC12ON) is less than ±0.5 LSB. The reference and input signal are

already settled.

3. Ten Tau (

τ) are needed to get an error of less than ±0.5 LSB. t(Sample) = 10 x (Ri + Zi) x Ci + 800 ns

C(VREF+)

µF

1 ms

10 ms

100 ms

t(REF_ON)

t(REF_ON) ~ 0.66 x C(VREF+) [ms] With C(VREF+) in

µF

100

µF

Figure 24. Typical Settling Time of Internal Reference t(REF_ON) vs External Capacitor on VREF+

MSP430F435IPZ Datasheet(PDF) 65 Page - Texas Instruments

MSP430F435IPZ Datasheet(HTML) 65 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85

Datasheet Download

Link URL